Operating Instruction Manual
ELECTRONIC MUSIC MIXER
Model D-5.5, D-5.5E
ToaElectricCo.,Ltd.
KOBE, JAPAN
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General Description
The TOA D-5.5 is a 19" rackmount or console configuration, eight-input stereo mixer especially designed
for electronic music and sound. It is expandable to a 32-input mixing system, with group, stereo and
mono outputs, and 16 MIDI-THRU jacks, when combined with two D-5.5E 12-input expansion units.
The D-5.5 was designed to perform many different applications in broadcast, live sound reinforcement,
and recording environments.
The D-5.5 provides four Group outputs, and mixing busses for Aux 1, Aux 2, Effects, Reverb, and Cue.
System features include: Sum output selectable pre- or post-fader (St. L + R); two Aux sends, selectable
pre-EQ/fader, post-EQ/pre-fader, or post-EQ/fader; Aux returns to Groups 1~4 and Stereo L, R, with pan,
level and crossfade controls; an effects patching loop and an internal spring reverb effect are returnable
to the 4 groups, stereo L, R, and Aux 1 & 2, with pan, level, and crossfade controls; dual bargraph meters,
selectable to Sum/Cue or Stereo L/R; a Headphone output with level control, a Cue buss output with
level control, and a Cue buss input.
Each input channel features a writing block to identify the source; tape/source selection switch; cue
switch; 60 mm fader; pad and trim controls; two-color LED to indicate signal prescence (green), or
clipping (red); channel on/off switch with orange LED indicator; 3-band EQ (high and low shelving-type,
and mid peaking-type with frequency sweep control); two Aux sends, selectable pre- or post-EQ; reverb
send to internal spring reverb; effects send; and four group sends via two pan and level controls.
Each of the four Groups features level and crossfade controls for returning Aux and Effects signals to the
Group mixing busses, and a stereo pan for assigning Group signals to the stereo Left and Right mixing
busses. The four groups and Stereo L, R also feature dual-color signal prescence/clip LED indicators; an
on/off switch with orange LED; writing block; 60 mm fader; and cue switch.
The D-5.5 rear panel features an RCA tape input, a 1/4" phone jack, and an electronically balanced XLR
(with switchable 48-volt phantom powering) for each input channel. Each input also has separate pre
and post accessory patch points and a direct output. Input channels 7 and 8 are front panel switchable to
stereo RIAA inputs, for use with magnetic cartridge turntable.
Group 1~4 output connections are RCA and 1/4" phone jacks; each features separate pre and post
accessory patch points (RCA). Stereo L, R and Sum output connections are individual RCA's, 1/4" phone
jacks, and electronically balanced XLR's with ground lift switches. Stereo L, R and Sum outputs also
feature pre and post accessory patching jacks.
The MIDI jacks are also located on the rear panel. "A" or "B" MIDI inputs are assignable to four
MIDI-THRU outputs (expandable to 16), allowing the use of multiple MIDI instruments without the data
loss or delay that may occur when several instruments are connected serially through their internal
MIDI-THRU jacks. Each MIDI-THRU output is provided with a front panel mounted on/off switch.
Also on the rear panel are a Buss-Link connector for connecting D-5.5 Expander units, separate 1/4"
phone jacks for stereo L, R Cue buss input and outputs, Aux 1, 2 sends and returns, external Reverb send
and return, and Effects send and return; a push button circuit breaker, chassis ground post, and six-foot
AC power cord complete the rear panel.
The D-5.5 combines with one D-5.5E for 20-inputs or two D-5.5E's for 32 input channels. Both units can
be mounted in a standard 19" rack, or may be used in a console configuration by removing the rack ears,
rotating the rear panel 90 degrees, and attaching the included wooden side panels. The mixers are
finished in an attractive and durable gray enamel, with 3-color control identification markings.
— 2 —
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Features
The D-5.5 is an 8 input, 19" rack mountable mixing console, featuring superior
audio performance, system expandability, and unique "user friendly" design.
Each Input Channel Feature:
System Features:
Tape/Source Selection switch.
8×4×2×1 configuration: 8 inputs; 4 sub groups;
stereo L & R; mono sum.
2-color LED indicator for signal presence (green) and
clip (red).
Expandable to 32 inputs with two 12 input D-5.5E
expansion unit.
Pad and trim controls.
Rear panel rotates 90 degrees to enable use as console
type mixer, or as 19" rack mount mixer with the
included mounting brackets; removable wooden side
panels.
3-band EQ; shelving type for high and low; peaking
mid with sweep control.
2 Aux sends; selectable pre or post.
Selectable 2×4 MIDI Thru function; expandable to
2×16.
Reverb send to internal spring reverb; post EQ and
fader.
Stereo RIAA Inputs for turntables with magnetic
cartridge; selectable from front panel; input channels
7 & 8.
Effect send; post EQ and fader.
4 group sends via 2 level and pan controls.
Channel on/off switch with LED indicator (orange).
Writing block.
2 Aux returns to four groups and Stereo L & R, with
level and crossfade controls.
Internal spring reverb with dedicated 2-band EQ. Can
return to four groups, stereo L & R, and Aux 1, 2 with
pan, level, and crossfade controls.
60 mm fader.
Cue switch.
Effects patching loop, returnable to four groups,
stereo L & R, and Aux 1, 2 with pan, level, and
crossfade controls.
Each Group Features:
Level and crossfade controls for returning aux and
effects signals to group busses.
Dual bargraph meters; selectable between Sum/Cue
and St L & R.
Stereo pan pot to Stereo L & R busses.
Sum Output (St L & R); selectable pre or post fader.
2-color LED indicator for signal presence (green) and
clip (red).
2 Aux sends; selectable "pre-EQ and fader," "post-
EQ, pre-fader," "post-EQ and fader."
Channel on/off switch with LED indicator (orange).
Mono reverb send and mono effects send; both are
"post EQ and fader."
Writing block.
60 mm fader.
Cue switch.
Headphones output with level control.
Push button circuit breaker instead of fuse.
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— 3 —
Features
Stereo L & R Features:
Sum Connections:
Separate pre and post accessory patch points: RCA.
2-color LED indicator for signal presence
(green) and clip (red).
Direct Output: RCA. 1/4" phone jack, and electroni-
cally balanced XLR with ground lift switch.
Channel on/off switch with LED indicator
(orange).
Writing block.
60 mm fader.
Cue switch.
Other Connections:
L & R Cue input: 1/4" phone jacks.
L & R Cue Buss output: 1/4" phone jacks.
Aux 1 & 2 sends and Aux 1 & 2 returns: 1/4" phone
jacks.
REAR PANEL:
Rev send, and return: 1/4" phone jacks.
Effects send, and return: 1/4" phone jacks.
A and B MIDI Input: DIN plug.
Input Channel Connections:
Separate pre and post accessory patch points: RCA.
Direct Output: RCA.
1-4 MIDI Thru: DIN plug.
Source inputs: 1/4" phone jack, and electronically
balanced XLR with individually switchable 48-volt
phantom power.
Buss Link: Multi-pin computer-type connector.
Tape input: RCA.
RIAA inputs on channels 7 & 8: RCA.
Group 1-4 Connections:
Separate pre and post accessory patch points:
RCA.
Direct Output: RCA, 1/4" phone jack.
Stereo L & R Connections:
Separate pre and post accessory patch points: RCA.
Direct Output: RCA, 1/4" phone jack, and electroni-
cally balanced XLR with ground lift switch.
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— 4 —
Front Panel (D-5.5)
INPUT CHANNEL
(D-5.5)
Phono EQ (RIAA) IN/OUT Switch (RIAA IN/OUT)
This switch is available for input channels 7 and 8 only and is active when a
turntable with magnetic type cartrige is connected to the Phono input channel.
The switch is a "push-in push-out" type. The "out" position provides a flat
frequency response.
Tape/Source Switch (TAPE/SOURCE)
This switch is provided for selecting the desired input signals. When monitoring
the signals from the XLR connector, phone jack and phono inputs, the switch
should be set to the "SOURCE" position. When the signal from the "Tape In"
input is desired, the switch should be set to the "TAPE" position.
Signal/Peak LED Indicator (SIG/PEAK)
The dual color LED indicator lights green when the pre or post EQ signal level
reaches more than -30dB, and turns red when the signal level reaches 3dB
below clipping, giving a visual reference for optimum setting of the trim control.
Input Level Selector (PAD)
The selector provides 30dB attenuation of the sensitivity of the XLR connector,
phone jack and phono inputs at the "30" position. The "0" position shows the
sensitivity indicated on the panel. The correct setting should be made according
to the output level of the equipment connected.
Input Trim Control (TRIM)
The trim control adjusts the gain of the preamp stage of the associated channel,
providing 30dB of gain control. When the trim control is set to the "0" position
with the input level selector at the "0" position, the nominal levels of the
associated inputs are as follows.
a. Mic input: -60dB
b. Tape input: -20dB
c. Phono input: -50dB (Input channels, 7 and 8 only)
The trim control and input level selector of each channel should be properly
adjusted so that the peak LED just begins to turn red from green or only flash red
occasionally. This will ensure lowest distortion level and optimum signal to
noise ratio.
High Equalizer Control (HIGH)
The high EQ control alters the high frequency response of the input channel,
providing 10dB at 4kHz, and 15dB at 20kHz of continuously variable active
shelving equalization. The "0" detented position provides flat audio response.
Mid Equalizer Center Frequency Control (MID FREQ)
This control alters the center frequency of the mid EQ control in the range from
200Hz to 5kHz.
Mid Equalizer Control (MID LEVEL)
This control alters the mid frequency response of the input channel, providing
15dB at the center frequency of peaking equalization. The "0" detented
position provides flat audio response.
Low Equalizer Control (LOW)
The low EQ control provides 10dB at 150Hz and 15dB at 20Hz of
continuously variable active shelving equalization. The "0" detented position
provides flat audio response.
AUX 1 Control (AUX 1)
This control determines the level of the input signal to be fed to the aux 1 buss.
When in the center detent position the control is off, and no signal is assigned.
Rotating the control counter-clockwise increases the amount of pre-fader/post-
EQ signal assigned to the buss. Rotating the control clockwise increases the
amount of post-fader/post -EQ signal.
Note: "Pre-fader/post-EQ" can be changed to the pre-EQ signal with an internal
switch. (See page 19 for details.)
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Front Panel (D-5.5, D-5.5E)
Group Assign Control 3 and 4 (GROUP LEVEL)
This control determines the amount of a given input
signal assigned to the group 3 and 4 via the group
assign control.
AUX 2 Control (AUX 2)
This control determines the level of the input signal
to be fed to the aux 2 buss. When in the center detent
position the control is off, and no signal is assigned.
Rotating the control counter-clockwise increases the
amount of pre-fader/post-EQ signal assigned to the
buss.
Group Assign Pan control 3 and 4 (GROUP PAN)
This pan control assigns the amount of signal
determined by the group assign control to the group
3 and 4 busses, providing equal output to the group 3
and 4 busses at the detent center position. Rotating
the pan control counter-clockwise decreases the
amount of the signal to be fed to the group 4 buss,
keeping the original level of the signal for the group 3
buss, while rotating the pan control clockwise
decreases the amount of the signal to be fed to the
group 3 buss, keeping the original level of the signal
for the group 4 buss.
Rotating the control clockwise increases the amount
of post-fader/post-EQ signal.
Note: "Pre-fader/post-EQ" can be changed to pre-EQ
signal with an internal switch. (See page 19 for
details.)
Reverb Control (REV)
This control determines the amount of post-fader/
post-EQ signal assigned to the reverb buss from a
given input channel, and thus the level of reberb for
that channel.
Channel Switch ON Indicator (CHANNEL ON)
The LED indicator lights orange when the channel
on/off switch is "on".
Effects Control (EFF)
This control determines the amount of post-fader/
post-EQ signal assigned to the effect buss from a
given input channel, and thus the level of effects for
that channel.
Channel ON/OFF Switch (CHANNEL)
This pushbutton connects or disconnects the input
signal to the mixing busses.
Group Assign Control 1 and 2 (GROUP LEVEL)
This control determines the level of input signal
assigned to the group buss 1 and 2 via the group
assign pan control.
Writing Block
The name of the input equipment or microphone
setting can be written in with an erasable felt pen or
grease pencil.
Group Assign Pan Control 1 and 2 (GROUP PAN)
This pan control assigns the amount of signal
determined by the group assign control to the group
1 and 2 busses, providing equal output to the group 1
and 2 busses at the center position. Rotating the pan
control clockwise decreases the amount of signal to
be fed to the group 2 buss, keeping the original level
of the signal for the group 1 buss, while rotating the
control counter-clockwise decreases the amount of
signal to be fed to the group 1 buss, keeping the
original level of the signal for the group 2 buss.
Input Fader
The fader provides continuously variable adjustment
of the channel's output to the mixing busses. The
nominal level is at the "0" position, with the fader
retaining a l0dB margin.
Cue Switch (CUE)
The cue switch is for monitoring the post-EQ,
pre-fader signal in each input channel through
headphone and cue output. The switch is a "push-on
push-off" type. When more than two switches are
"on" the signals are combined.
MIDI THRU
(D-5.5E)
(D-5.5)
MIDI THRU ON/OFF Switch (MIDI THRU ON/OFF)
This switch is for "on" or "off" function of each MIDI
THRU output. The MIDI THRU is "on" in the "push"
position.
The D-5.5 incorporates two, switchable MIDI inputs
and four MIDI THRU outputs. With the D-5.5E, six
additional MIDI THRU outputs are available.
MIDI LED Indicator (MIDI IN)
This yellow LED indicates the presence of MIDI data
at the MIDI input jack on the rear panel (MIDI IN).
CAUTION
While the MIDI LED indicator is flashing, do not
operate either the MIDI input selector switch or
the MIDI THRU on/off switch in order to avoid
malfunction of connected MIDI equipment.
MIDI Input Selector Switch (MIDI IN, A, B)
This switch selects either the MIDI input B signal in
the "push" position, or A signal in the "release"
position.
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— 6 —
Front Panel (D-5.5)
OUTPUT CHANNEL
Level Control for Return to Group (RET TO GROUP,
LEVEL)
This control adjusts the level of signal from the AUX
1 return and AUX 2 return, or the EFF return and
REV return.
Cross-fate Control to Group (RET TO GROUP,
X-FADE)
With the return signal select switch set to the
REV/EFF position, the EFF and REV return signal
levels are equally assigned to the group buss. When
the control is in its center, detent position. Rotating
the control counter-clockwise decreases the signal
level of the EFF return, keeping the original level of
the REV return signal, while rotating the control
clockwise decreases the signal level of the REV
return, keeping the original level of the EFF return
signal.
With the return signal select switch set to the aux
1/aux 2 position, the aux 1 and aux 2 return signal
levels are equally assigned to the group buss when
the control is in its center, detent position. Rotating
the control counter-clockwise decreases the signal
level of the aux 2 return signal, keeping the original
level of the aux 1 return signal, while rotating the
control clockwise decreases the signal level of the
aux 1 return, keeping the original level of the aux 2
return signal.
Return Signal Select Switch (REV/EFF, AUX 1 /
AUX 2)
This switch selects either the REV/EFF return signals
or the AUX 1 / AUX 2 return signals to feed them to
the group buss.
Pan Pot (PAN)
The pan pot control assigns the fader output signal of
each group channel to the stereo L and R mixing
busses. At the detented center position, the pan pot
routes the signal equally to the L and R mixing
busses. Panning from one side to the other gradually
assigns the input signal to either the stereo L or R
mixing busses exclusively.
Signal/Peak LED Indicator (SIG/PEAK)
The LED indicator lights in green colour when the
group output signal reaches more than -30dB, and
turns to red when the groups signal reaches -3dB
below clipping, giving a visual reference for adjust-
ment of the group fader. (See NOTE 1)
Group Channel ON indicator (CHANNEL ON)
The LED indicator lights orange when the group
channel ON/OFF switch is "on".
Group Channel ON/OFF Switch (CHANNEL)
This pushbutton connects or disconnects the signal
to the group output and stereo L/R busses.
NOTE 1:
Levels should be adjusted so that the LED only
flashes red intermittently. A steady red light
indicates that the channel is being over driven
and the level should be reduced.
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Front Panel (D-5.5)
Writing Block
The name of the source signal can be written in with
an erasable felt pen or grease pencil.
Cue Switch (CUE)
The switch permits monitoring the signal prior to the
effect return level control.
Group Fader (GROUP 1 - 4)
Sum Select Switch (SUM SLECT, PRE/POST)
This switch selects either the channel pre-fader or
post-fader signals derived from the stereo L and R
busses, and sends them to the SUM output. The
switch provides pre-fader signal in the "push"
position, and post-fader signal in the "release"
position.
The 60mm fader provides continuously variable
adjustment of the group level to the stereo L and R
busses, and the group output connectors.
Cue Switch (CUE)
The cue switch is for monitoring the pre-fader signal
in each group channel through the headphones and
cue out. This function is for independent audition of
the group mixes.
Signal/Peak LED Indicator (SIG/PEAK)
The LED indicator lights green when the sum output
signal reaches more than -30dB, and turns to red
when the signal level reaches -3dB below clipping,
giving a visual reference for adjustment of the SUM
channel fader. (See NOTE 1)
Level Control for Aux 1 Return to Stereo L and R
(AUX/RET, LEVEL)
This control adjusts the signal level from the AUX 1
return and feeds it to the stereo L and R busses via
the pan control.
Sum Channel ON Indicator and Channel ON/OFF
Switch (CHANNEL ON)
The LED indicator lights orange when the channel
on/off switch is "on".
Pan Pot (PAN)
The pan control assigns the signal from the AUX 1
return to the stereo L and R busses.
Writing Block
Cue Switch (CUE)
The switch permits monitoring the AUX 1 signal
prior to the AUX 1 return level control.
Sum Out Fader (SUM)
The fader provides continuously variable adjust-
ment of the SUM output.
Level Control for Aux 2 Return to Stereo L and R
(AUX 2 RET, LEVEL)
This control adjusts the signal level from the AUX 2
return and feeds it to the stereo L and R busses via
pan control.
Cue Switch (CUE)
The cue switch permits monitoring the pre Sum-
fader signal through the headphone and cue output.
Aux 1 / 2 Send Control (AUX SEND, AUX 1 / AUX 2)
The aux 1 and aux 2 send controls govern the overall
level of signal sent to on-stage monitor amplifiers, or
an outboard effect device thought the aux 1 and 2
send jacks on the rear panel.
Pan Pot (PAN)
The pan control assigns the signal from the AUX 2
return to the stereo L and R busses.
Cue Switch (CUE)
Reverb Send Control (REV/EFF SEND, REV)
This control governs the overall level of signal sent
to the built-in reverb unit or an outboard effect
device through the reverb send jack on the rear
panel.
The switch permits monitoring the AUX 2 signal
prior to the AUX 2 return level control.
Level Control for Reverb Return or Built-in Reverb
to Stereo L and R (REVERB RET, LEVEL)
The control adjusts the signal level from the reverb
or the built-in reverb and feeds it to the stereo L and
R busses via the pan control.
Effect Send Control (REV/EFF SEND, EFF)
This control governs the overall level of signal sent
to an outboard effects device through the Effect Send
jack on the rear panel.
Pan Pot (PAN)
The pan control assigns the signal from the reverb
return to the stereo L and R busses.
Internal Reverb Equalizer Control (INT REV EQ,
HIGH/LOW)
These controls alter the frequency response of the
built-in reverb circuitry. The high EQ control pro-
vides 10dB at 4kHz, and 15dB at 20kHz of
continuously variable active shelving equalization.
Cue Switch (CUE)
The switch permits monitoring the signal prior to the
reverb return level control.
Level Control for Effect Return to Stereo L and R
(EFF RET, LEVEL)
This control adjusts the signal level from the effects
return and feeds it to the stereo L and R busses via
the pan control.
The low EQ control provides 10dB at 150Hz and
15dB at 20Hz of continuously variable active
shelving equalization. The "0" detented position of
both controls provide flat audio response.
Pan Control (PAN)
The pan control assigns the signal from the effects
return to the stereo L and R busses.
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— 8 —
Signal/Peak LED Indicator (SIG/PEAK)
Level Control for Effect and Reverb Return to Aux 1
(REV/EFF TO AUX, LEVEL AUX 1)
The LED indicator lights green when the stereo out L
or R signals reach more than -30dB, and turns to red
when the stereo out L or R signals reach -3dB below
clipping, giving a visual reference of adjustment of
the stereo L or R faders. (See NOTE 1)
This control governs the amount of reverb signal
(built-in or outboard) returned through the reverb
return jack (REV RET), and effect signal returned
through the effect return jack (EFF RET) to AUX 1
mixing buss. The signals of REV RET and EFF RET
are controlled simultaneously.
Stereo Channel ON Indicator and Channel ON/OFF
Switch (CHANNEL ON)
The LED indicator lights orange when the channel
switch is "on".
Cross-fade Control to Aux 1 (REV/EFF TO AUX,
X-FADE)
When this control is in the center position, the REV
RET and EFF RET signals are equally assigned to the
AUX 1 mixing buss. Rotating the control counter-
clockwise decreases the EFF RET signal level,
keeping the original level of the REV RET signal.
Rotating the control clockwise decreases the REV
RET signal level, keeping the original level of the
EFF RET signal.
Writing Block
Stereo Left and Right Fader (STEREO L, R)
The fader provides continuously variable adjust-
ment of the stereo L or R output, and the signal level
to the Sum out channel when the sum select switch
is set in the "POST" position.
Cue Switch (CUE)
The cue switch permits monitoring the pre stereo L,
R fader signals through the headphones and cue out.
Level Control for Effect and Reverb Return to Aux 2
(REV/EFF TO AUX, LEVEL AUX 2)
This control governs the amount of reverb signal
(built-in or outboard) returned through the reverb
return jack (REV RET), and effect signal returned
through the effect return jack (EFF RET) to AUX 2
mixing buss. The signal ofREV RET and EFF RET are
controlled simultaneously.
Power LED indicator and Switch (POWER)
The power switch alternately turns AC power to the
D-5.5 "on" and "off". The LED indicator lights when
the switch is "on".
Dual LED Bargraph Meter and Meter Select Switch
(METER SELECT, SUM/CUE, L/R)
Cross-Fade Control to Aux 2 (REV/EFF TO AUX,
X-FADE)
The meter indicates the sum output (left side) and
cue output (right side) when the meter select switch
is set in the "push" position, and indicates the stereo
L output (left side) and stereo R output (right side)
when the meter select switch is set in the "release"
position.
When the control is in the center position, the REV
RET and EFF RET signals are equally assigned to the
AUX 2 mixing buss. Rotating the control counter-
clockwise decreases the signal level of the EFF RET,
keeping the original level of the REV RET signal.
Rotating the control clockwise decreases the signal
level of the REV RET, keeping the original level of
the EFF RET signal.
Cue Out Level Control and Cue ON LED Indicator
(CUE OUT, CUE)
The cue out level control adjusts both the stereo L
and R signals and the Cue in (L, R) signal fed to the
Cue output on the rear panel (CUE OUT) and permits
stereo monitoring when the cue switch is "off".
When the cue switch is "on", the control adjusts the
corresponding cue signal. When two or more of the
cue switches are "on", the control adjusts the
corresponding combined cue signals. The cue on
LED lights when one of the cue switches is "on".
Headphone Level Control and Jack (PHONES)
The phones level control adjusts both the stereo L
and R signals and the Cue IN (L, R) signal fed to the
phones output and permits stereo monitoring when
the cue switch is "off". When the cue switch is "on",
the control adjusts the corresponding cue signal.
When two or more of the cue switches are "on", the
control adjusts the corresponding combined cue
signals. The headphone jack will accept any stereo
headphone with 8 ohms impedance, or higher.
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Front Panel (D-5.5E)
* The names of the functions on the D-5.5E are specified below as function of the input channel on the D-5.5 is
the same as the D-5.5E. Difference in functions are explained.
Power LED indicator and Switch (POWER)
The power switch alternately turns AC power to the D-5.5E "on" and "off".
The LED indicator lights when the switch is "on".
Tape/Source Switch (TAPE/SOURCE)
Signal/Peak LED Indicator (SIG/PEAK)
Input Level Selector (PAD)
Input Trim Control (TRIM)
High Equalizer Control (HIGH)
Mid Equalizer Center Frequency Control (MID FREQ)
Mid Equalizer Control (MID LEVEL)
Low Equalizer Control (LOW)
AUX 1 Control (AUX 1)
AUX 2 Control (AUX 2)
Reverb Control (REV)
Effects Control (EFF)
Group Assign Control 1 and 2 (GROUP LEVEL)
Group Assign Pan Control 1 and 2 (GROUP PAN)
Group Assign Control 3 and 4 (GROUP LEVEL)
Group Assign Pan Control 3 and 4 (GROUP PAN)
Channel Switch ON Indicator (CHANNEL ON)
Channel ON/OFF Switch (CHANNEL)
Writing Block
Input Fader
Cue Switch (CUE)
— 13 —
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Rear Panel (D-5.5E)
* The names of the functions on the D-5.5E are specified below as connection of the
input channel on the D-5.5 is the same as the D-5.5E. Difference in functions and
connection are explained.
RCA Pre Accessory
Buss Link Connector
(BUSS LINK OUT)
Patch Points
This connector is used to
link the D-5.5E Expander
(PRE IN/OUT)
with the D-5.5.
A
six-foot
RCA Post Accessory
Patch Points
(POST IN/OUT)
connecting cord is included
with the D-5.5E.
Buss Link Connector
(BUSS LINK IN)
This connector is used to
link the D-5.5E Expander
with another D-5.5E Expan-
der.
Direct Output
(DIRECT OUT)
RCA Tape Input
(TAPE IN)
Earth Terminal
Balanced XLR Microphone
Input (MIC)
MIDI Thru Connectors
AC Power Cord
(6 ft.)
(MIDI THRU)
The MIDI signal from the
MIDI input connector (MIDI
IN) is split and sent un-
altered to the four MIDI Thru
connectors on the D-5.5, and
to six more MIDI Thru con-
nectors on the D-5.5E, if
used. Each of the MIDI Thru
jacks can be connected to a
different synthesizer's MIDI
input jack, allowing one
MIDI keyboard or sequencer
to control up to four other
MIDI synths. (ten when using
the D-5.5E and sixteen when
using the two D-5.5E's.)
Phantom Power Switches
(PHANTOM 9~20)
Pushbutton Circuit Breaker
(1A)
(PUSH RESET)
This breaker is designed to
protect the D-5.5E in the
event of internal or external
fault. Wait about two mi-
nutes after correcting the
fault and push the button to
reset the system and restore
proper operation.
1/4" Phone Channel
Input (INPUT)
— 14 —
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Block Diagrams
D-5.5 BLOCK DIAGRAM
D-5.5E BLOCK DIAGRAM
— 15 —
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Level Diagrams
D-5.5 LEVEL DIAGRAM
D-5.5E LEVEL DIAGRAM
— 16 —
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Specifications (D-5.5, D-5.5E)
GENERAL SPECIFICATIONS
Frequency Response
Equalization
LOW
15dB
15dB
15dB
20Hz Shelving
200Hz to 5kHz Variable Peaking
20kHz Shelving
MID
+0dB, -0.5dB
+0dB, -3.0dB
50Hz to 20kHz
20Hz to 50kHz
HIGH
Sig./Peak Indicator
Total Harmonic Distortion
Sig. (Green) LED turn on at -30dB below nominal level
Peak (Red) LED turn over from Sig. (Green) at -3dB below clipping
Less than 0.3%
Less than 0.1%
+4dB* 1kHz
+4dB* 1kHz
(MIC IN)
(INPUT)
Phantom Power
Hum and Noise (20Hz to 20kHz)
48V DC is applied to MIC Input for powering condenser mic-
rophones
-125dB* Equivalent Input Noise
(MIC IN)
-127dB*
Equivalent Input Noise IHF-A weighted (MIC IN)
Meter ("0" = Nominal level of STEREO, SUM OUT and CUE bus)
pair of 12 segment bargraph LED meter for STEREO L, R or SUM,
CUE
-100dB* All Fader minimum
-70dB*
-65dB*
-61dB*
Master (GROUP, STEREO or SUM) Fader
Nominal, D-5.5 only
Master (GROUP) Fader Nominal, D-5.5E con-
nection
Master (GROUP) and One Input Fader
Nominal
Power Consumption
D-5.5
D-5.5E
41W
39W
Dimensions (W×D×H)
Maximum Voltage Gain
104dB
94dB
MIC IN to SUM OUT
MIC IN to STEREO OUT
84dB
64dB
54dB
34dB
MIC IN to GROUP OUT
Weight
INPUT to GROUP OUT
D-5.5, D-5.5E
22kg (48.5lbs)
INPUT to AUX½, REV, EFF SEND
AUX½, REV, EFF RET to GROUP OUT
Accessory (D-5.5E ONLY)
BUSS LINK CABLE 6ft.
1
* 0dB is referenced to 0.775V RMS
Specifications are subject to change without notice.
0dB is referenced to 0.775V RMS
INPUT SPECIFICATIONS (D-5.5, D-5.5E)
Input Level (Trim "0" to Trim "-30")
Nominal MAX. Before Clip
-40dB (7.8mV)
Actual Load
Input
For Use
Connector
Impedance
With Nominal
PAD
0
-60dB(0.78mV)
to -30dB (25mV)
to -10dB (250mV)
-30dB (25mV) -10dB (250mV)
to 0dB (780mV)
to +20dB (7.8V)
-40dB (7.8mV)
-20dB (78mV)
to -10dB (250mV) to +10dB (2.5V)
-10dB (250mV)
to + 20dB (7.8V)
-20dB (78mV)
MIC 1~8
<9~20>
XLR-3-31 TYPE
MICROPHONES
30
0
INPUT 1~8
<9~20>
or LOWER
IMP. LINES
¼" PHONE JACK
+10dB (2.5V)
0dB (780mV)
-30dB (25mV)
30
to +40dB (78V)
to +30dB (25V)
TAPE 1~8
<9~20>
or LOWER
IMP. LINES
RCA PIN JACK
RCA PIN JACK
to + 10dB (2.5V)
-50dB (2.5mV)
PHONO (RIAA) 7 & 8
to 0dB (780mV) at 1kHz
+ 10dB (2.5V)
to -20dB (78mV) at 1kHz
ACCESSORY IN PRE/POST
(INPUT, GROUP, STEREO,
SUM)
EXCEPT GROUP, STERO,
SUM. ACCESSORY IN POST
+6dB (1.6V)
or LOWER
IMP. LINES
-10dB (250mV)
RCA PIN JACK
AUX1 RET, AUX2 RET
REV RET, EFF RET
or LOWER
-20dB (78mV)
-10dB (250mV)
+10dB (2.5V)
+24dB(12V)
¼" PHONE JACK
¼" PHONE JACK
IMP. LINES
or LOWER
IMP. LINES
CUE IN L & R
D-5.5EONLY
All XLR type connectors are electronically balanced.
The XLR type connectors are wired as follows. Pin No.1-Ground, Pin No.2-Cold (Low), Pin No.3-Hot (High)
0dB is referenced to 0.775V RMS
Connector
OUTPUT SPECIFICATIONS (D-5.5, D-5.5E)
Output Level
Output
Actual Source Impedance
For Use With Nominal
Lines
Nominal
+4dB (1.2V)
MAX. Before Clip
+20dB (7.8V)
+6dB (1.6V)
+20dB (7.8V)
+ 20dB (7.8V)
+ 6dB (1.6V)
¼" PHONE JACK
RCA PIN JACK
XLR-3-32TYPE
¼" PHONE JACK
RCA PIN JACK
GROUP 1~4
-10dB (250mV)
+4dB (1.2V)
Lines
+4dB (1.2V)
STEREO L & R SUM
-10dB (250mV)
AUX1 SEND, AUX2 SEND
REV SEND, EFF SEND
ACCESSORY OUT
PRE/POST (INPUT, GROUP,
STEREO, SUM)
DIRECT OUT 1~8
<9~20>
CUE OUT L & R
+4dB (1.2V)
+20dB (7.8V)
Lines
Lines
¼" PHONE JACK
RCA PIN JACK
RCA PIN JACK
+ 10dB (250mV)
+ 20dB (7.8V)
-10dB (250mV)
+4dB (1.2V)
+ 10dB (2.5V)
+ 20dB (7.8V)
-6dB (390mV)/8
+ 20dB (7.8V)/OPEN
Lines
Lines
¼" PHONE JACK
¼" STEREO
or higher
PHONES
PHONE JACK
D-5.5E ONLY
Stereo phone jack is wired : Tip=Left, Ring=Right and Sleave=Common.
All XLR type connectors are electronically balanced.
The XLR type connectors are wired as follows Pin No.l-Ground, Pin No.2-Cold (Low), Pin No.3-Hot (High)
— 17 —
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Rack Mounting Instructions
The D-5.5 and D-5.5E are designed for either console or rack-mount use, using a pair of
brackets (included). The following procedure should be observed for the rack-mount use.
1. Remove both side panels
and armrest
unscrewing
and removing 6 screws.
2. Mount the brackets on both
sides of the chassis, using the
screws removed from the
side panels.
and blank
should be inter-
3. The rear panel
panel
changed to allow for easy
connection when the D-5.5
and D-5.5E are rack
mounted.
a. Remove the rear panel
corner frame
and blank panel
b. Put the rear panel in the original position of the blank panel.
c. Put the corner frame back in place.
d. Put the blank panel in the original position of the rear panel.
WARNING
The D-5.5 and D-5.5E contain voltage levels that may be hazardous to human life. Always
disconnect the power cord from wall outlet prior to removing either unit's outer case.
— 18 —
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Procedure for Changing Internal Switch Setting
NOTE:
The internal switches have been provided for added
versatility when using the D-5.5 and D-5.5E in a
variety of applications.
AUX 1 / AUX 2 SEND PRE/POST EQ SELECTION
SWITCH: Each input features an auxiliary send control
for use as either an additional effects send, or as an
on-stage monitor send. You should note that the Aux 1
and 2 control are a "split" pot with the
detent
position (12o'clock) being the off position. Typically,
the control would be rotated clockwise ("post") when
used as an effects send. This enables the effects level to
be automatically increased as the input channel level
increases. Obviously, since this signal is also derived
"post" EQ, any changes made in the input channel's EQ
settings will be reflected in the effects signal. When the
AUX 1 or 2 control is to be used as an on-stage
monitoring send, the control would typically be rotated
counter clockwise ("pre"). This allows the on-stage
monitor mix to operate independently of the input
channel's fader. In other words, any change in the input
channel's fader will not affect the level of the monitor
mix. The Aux Send Pre/Post EQ Selection Switch is
active only when the Aux 1 or 2 Control is used in the
"pre" (counter clockwise) position. When the switch is
set to the "pre" EQ position, the input channel's EQ
controls will not affect the on-stage monitor mix. This is
particularly desirable when the input source is a
microphone. Since an on-stage monitor system is
normally operated near acoustic feedback, a change in
EQ (especially an increase in high frequencies) may
cause ringing or squealing (feedback) through the
on-stage monitor speaker system. However, when the
input source is a synthesizer, musical instrument, etc.,
which is not so susceptible to feedback, you may desire
to place the switch in the "post" EQ position so that the
input channel EQ will affect that instrument in the
monitor mix.
Fig l
INPUT
CHANNEL
PCB
PRE
PRE
PRE
POST
POST
POST
BUSS LINK
CONNECTOR
NOTE:
The Aux 1 and 2 controls are unable to independently
derive the pre or post EQ signal via the pre/post EQ
selection switch, but always derive the same signal.
Also the selection switch provides the pre or post EQ
signal for the cue switch.
Fig 2
WARNING
3. Refer to block diagrams and Figure 2 for location and
orientation of switches.
4. Set switches to desired positions.
5. Carefully replace the bottom panel and secure with
four screws.
6. The Aux send pre/post EQ switch is factory preset at
"POST" position (post-EQ).
The D-5.5 and D-5.5E contain voltage levels that may be
hazardous to human life. Always disconnect the power
cord from wall outlet prior to removing either unit's
outer case.
1. Disconnect the power cord from the wall outlet.
2. Remove the four screws that secure the bottom panel
to the main chassis, and carefully remove the panel
(See Fig 1)
— 19 —
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Characteristics Diagrams
FREQUENCY RESPONSE
INPUT EQ CHARACTERISTICS
FREQUENCY
FREQUENCY
Appearance
D-5.5
*Dimensions with brackets
D-5.5E
*Dimensions with brackets
— 20 —
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Toa Electric Co., Ltd.
KOBE, JAPAN
Printed in Japan
133-02-748-80
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