Owner’s Manual
for the
BX-440H / BX-4115
I
N
P
U
T
E Q U A L I Z A T I O N
M A S T E R
CROSSOVER
LINE OUT
EFFECTS HEADPHONES
INCREASE
GAIN
MASTER
LEVEL
BLEND
LEVEL
FREQUENCY
0Hz
BALANCE
POWER
GAIN
6
CONTOUR
5
5
5
5
5
30
INPUT
4
0
4
6
4
6
4
6
4
6
4
6
3
7
3
7
3
7
3
7
3
7
3
7
OK
2
8
2
8
2
8
2
8
2
8
2
8
1
9
1
9
1
9
1
9
1
9
1
9
DECREASE
GAIN
1
0
0
10
0
10
0
10
0
10
1
0
0Hz
1kHz
L
O
HI
40 100 225 625 1.6k 4k
8k 16k
—
15dB
CONTOUR
ON/OFF
LIMIT
POST/PRE
BX-440H
HEADPHONES
®
I
N
P
U
T
E Q U A L I Z A T I O N
M A S T E R
CROSSOVER
C H O R U S
LINE OUT
EFFECTS HEADPHONES
INCREASE
GAIN
MASTER
LEVEL
BLEND
LEVEL
FREQUENCY
0Hz
BALANCE
SPECTRUM
250
DEPTH
RATE
POWER
GAIN
CONTOUR
5
5
5
5
5
30
5
5
INPUT
4
0
6
4
6
4
6
4
6
4
6
4
6
4
6
4
0
6
3
7
3
2
7
3
7
3
7
3
7
3
7
3
7
3
7
OK
2
8
8
2
8
2
8
2
8
2
8
2
8
2
8
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
CHORUS
ON/ OFF
DECREASE
GAIN
ACTIVE
1
0
0
10
0
10
0
10
0
10
0
10
1
0
1
0
0Hz
1kHz
L
O
HI
F
U
L
L
500
40 100 225 625 1.6k 4k
8k 16k
BX-4115
—
15dB
CONTOUR
ON/OFF
LIMIT
POST/PRE
®
HEADPHONES
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BX-440H / BX-4115 ThunderBass Amplifier
Introduction:
Crate’s new BX-440H/BX-4115 ThunderBass amplifiers are feature-packed, professional strength power-
houses which can deliver incredible bass sounds. Rugged construction, reliable American craftsmanship and
solid state electronics add up to create very roadworthy, stage-ready gear.
The BX-440H packs solid performance into a compact head unit, contained in a rugged Tolex® covered
cabinet. Its side-mounted handle and heavy duty rubber feet on two sides increase its value to those musi-
cians who are always “on the go.” The BX-4115 combines the same great bass amp with an equally out-
standing 15” ThunderBass American-made transducer for a small but hard hitting combo amp suitable for
the club, small hall or recording studio.
Both amplifiers will deliver 440 watts into 4 ohms, or 250 watts into 8 ohms. A listing of the features of
these amps is given below.
Features:
Additional information can be found on the pages indicated.
• Solid state circuitry for reliable service and incredible tones.
• Crate’s APM (Automatic Power Maximizer) limiter circuit for the most output without distortion.
• Variable input gain control with -15dB pad switch and 3 input LEDs for the best match between your
bass and the amplifier (page 4).
• Switchable contour control (page 4).
• 8-band graphic equalizer for optimum tone control (page 4).
• Biamp high and low outputs with adjustable crossover frequency and low-to-high balance (page 4).
• Switchable chorus with adjustable spectrum, rate and depth controls (BX-4115 only) (page 4).
• Balanced line out with adjustable level control and “pre/post” switch (pages 4 and 5).
• Headphone jack with adjustable level control for private practice sessions (page 4).
• Effects loop for noiseless use of your favorite processors and effects (page 5).
• Rugged Tolex® covered cabinets for durability with nickel and chrome accents for high cosmetic appeal.
• Removable heavy duty casters for ease of transportation (BX-4115 only).
• Musician made in the U.S.A.
• Crate’s exclusive 5-year warranty (U.S. only). Outside U.S. see local dealer for warranty terms and
information.
3
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BX-440H / BX-4115 ThunderBass Amplifier
The Front Panel:
1
2 4
5
7
8 10 12 13 15 16
1718 19 20 21
22
I N P U T
E Q U A L I ZZ A T I O N
M A S T E R
CROSSSOVER
C H O R U S
EFFECTS HEADPHONES
LINE OUT
INCREASE
GAIN
LEVEL
BLEND
LEVEL
FREQUENCY
300Hz
BALANCE
SPECTRUM
250
DEPTH
RATE
POWER
MASTER
GAIN
CONTOUR
5
5
5
5
5
5
5
INPUT
4
6
4
6
4
6
4
6
4
6
4
6
4
6
4
0
6
3
7
3
7
3
7
3
7
3
7
3
7
3
7
3
7
OK
2
8
2
8
2
8
2
8
2
8
2
8
2
8
2
8
CHORUS
ON/ OFF
1
9
1
9
1
9
1
9
1
9
1
9
1
9
1
9
DECREASE
GAIN
ACTIVE
0
10
0
10
0
10
0
10
0
10
0
10
10
100Hz
1kHz
LO
HI
FULL
500
40 100 225 625 1.6k 4k
8k 16k
BX-4115
— 15dB
CONTOUR
ON/OFF
LIMIT
POST/PRE
®
HEADPHONES
3
6
9 11
14
1. INPUT: Connect your bass to the amplifi-
8. MASTER LEVEL: Use this control to set
the output level of the amplifier. This controls
the signal level at the Speaker Output jacks
(#30), as well as the Preamp Out jack (#28).
ting of the Headphones Level control (#13).
Using headphones does not disable the speak-
er outputs or the internal speaker (BX-4115).
You may also use this output (or the line out
jack, #31) to run a signal to a tuner.
er here.
2. GAIN: Use this control to properly match
the output of your bass to the amplifier. With
the amp’s Master level control at “0”, begin
playing your bass as you normally would.
Watch the adjacent LEDs (#4) as you turn up
the Gain control: the proper setting for the Gain
control is the one where the “OK” LED lights
most often while playing. If the “Decrease
Gain” LED stays lit even with the Gain control
turned down low, press in the -15dB button
(#3) and continue adjusting the Gain control
until the proper setting is obtained.
9. LIMIT: The amplifier employs Crate’s
APM Automatic Power Maximizer protection
circuitry to keep the output distortion-free even
at high volume levels. Whenever the output
nears its clipping point, the limit circuit kicks in
to keep the output clean. The Limit LED lights
up when the APM limiter circuit is activated.
Occasional flashing of the LED is normal. Very
frequent flashing or constant illumination indi-
cates the output level is too high; reduce the
Master level control (#8) and/or your instru-
ment’s output until the LED flashes less.
15. FREQUENCY: This sets the crossover
point when using the amplifier in the biamp
mode (using two power amplifiers, one for the
low frequencies, one for the highs). Please see
the section entitled “Using the Biamp
Capabilities” on pages 6 - 9 for more details
about biamping.
16. BALANCE: This adjusts the relative level
between the low frequency and the high fre-
quency biamp output signals. Please see the
section entitled “Using the Biamp Capabilities”
on pages 6 - 9 for more details.
3. -15dB: If your bass has active electronics
or “hot” pickups, its output signal may need to
be padded to get the best signal to noise setting
from the Gain control. If the “Decrease Gain”
LED stays lit with the Gain control turned down
low, press in the -15dB button.
10. LINE OUT LEVEL: This controls the level
of the signal at the Balanced Line Out jack
(#31). You may also use this output (or the
headphone jack, #14) to run a signal to a tuner.
17-21, Chorus Section, BX-4115 Only:
17. CHORUS ON/OFF: This switch turns the
Chorus section on when pressed in, off when
switched out.
4. LEDs: These three LEDs are your guide to
properly setting the Gain control. Follow the
steps given for the Gain control (#2) until the
“OK” LED lights most often while you play.
11. POST/PRE: This switch selects the tap
point for the signal at the Balanced Line Out
jack. With the switch out, the signal is tapped
before the eq, contour and effects loop (“pre”).
With the switch pressed in, the signal is tapped
after the eq, contour and effects loop (“post”).
18. SPECTRUM: This control allows you to
adjust which frequencies (from the entire range
to only above 500Hz) are enhanced by the
chorus effect. The further to the left (toward
“Full”) you turn the control the broader the
spectrum of the chorus effect.
5. CONTOUR: This control allows you to
make additional changes to your tone and is
active only when the Contour On/Off switch
(#6) is pressed in. As the “wave” icons indicate
you can enhance both the lows and highs at the
same time, or add mid punch.
12. EFFECTS BLEND: This control propor-
tions the amount of effect added to the signal
going to the power amp stage. At the “0” posi-
tion the signal is “dry” (no effect added); as you
bring the control towards “10” the amount of
effect applied increases. (“5” is a 50/50 blend of
dry signal and effects.)
19. DEPTH: This control sets the amount of
chorus enhancement: towards “0” for less,
towards “10” for more.
6. CONTOUR ON/OFF: Use this switch to
engage the contour circuitry. With the switch
pressed in, the Contour control (#5) is active.
20. RATE: This control sets the speed for the
chorus effect: towards “0” for slower, towards
“10” for faster.
13. HEADPHONES LEVEL: This control
adjusts the signal level at the Headphones jack
(#14).
7. EQUALIZATION: This eight-band graphic
equalizer allows you to custom tailor your tone.
Each slider controls the frequency indicated
directly below it and offers a cut or boost of
10dB at various frequencies from 40Hz to
16kHz
21. ACTIVE: This LED lights when the chorus
effect is engaged. The LED pulses in relation to
the rate of the chorus.
14. HEADPHONES: Plug a pair of stereo
headphones in here for private listening. The
signal at this jack is post Gain and post EQ. The
level of the signal here is determined by the set-
22. POWER: This two-position switch turns the
amp on and off, “on” being the UP position.
The switch lights up when the amp is turned on.
4
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BX-440H / BX-4115 ThunderBass Amplifier
The Rear Panel:
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
RISQUE DE CHOC
ELECTRIQUE. NE PAS OUVRIR.
WARNING: TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
1200W MAX
MODEL
/
120V
/
60Hz
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
BX-440H
SERIAL #
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
ST. LOUIS, MO 63133
23. POWER CORD: Connect the male end
of this cord to a properly grounded AC
power outlet. Use only a grounded outlet!
DO NOT defeat the ground pin of the
cord! If the amplifier is used outside of the
United States, see the area’s Crate dealer for
the proper power cord or consult a local pro-
fessional electrician.
27. BIAMP HIGH OUT: When used in
the biamp mode, this output connects to
the high frequency power amplifier. See
the section entitled “Using the Biamp
Capabilities” on pages 6 - 9 for details.
Cab Imp.
8 ohms
16 ohms
16 ohms
# Cabs
Total Imp.
4 ohms
8 ohms
4 ohms
2
2
4
28. PREAMP OUT: A pre-amplified line
level signal may be tapped from this jack for
sending to an external amplifier, powered
monitor, recording console, mixing board or
effects processor. This is an unbalanced,
mono 1/4” jack.
31. BALANCED LINE OUT: Use this 3-pin
XLR jack to send a line level signal to the
house sound board or mixing console. The
level of the signal at this jack is determined by
the setting of the Line Out Level control on
the front panel (#10). This signal is switch-
able to be either pre or post EQ through the
front panel Pre/Post switch(#11).
24. EFFECTS LOOP RETURN: When
using an external signal processor, the best
results will be obtained when the device is
connected to the amplifier’s effects loop for
virtually noise-free operation. This jack
receives the output signal from such a
processor
29. POWER AMP IN: A pre-amplified line
level signal may be sent directly into the bass
amp’s power amp (as when slaving two
amplifiers together, for example). Connection
to this jack interrupts the signal from the inter-
nal preamp to the power amp. The Preamp
Out (#28) signal is not interrupted.
25. EFFECTS LOOP SEND: This unbal-
anced jack lets you send a signal out to an
external effects processor or tuner. The signal
at this jack is post-EQ, pre-Master. Connect
this to the input jack of the processor or
tuner. Use shielded cables with mono 1/4”
plugs for connecting the Effects Loop.
30. SPEAKERS: Use these jacks to connect
the amp to your speaker cabinet(s). Use
heavy duty speaker cables with mono 1/4”
plugs. These jacks are wired in parallel. Don’t
use cabinet combinations resulting in imped-
ance loads below 4 ohms. Use the following
chart to help determine parallel loads. If in
doubt, ask your dealer.
26. BIAMP LOW OUT: When used in
the biamp mode, this output connects to
the low frequency power amplifier. See
the section entitled “Using the Biamp
Capabilities” on pages 6 - 9 for details.
5
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BX-440H / BX-4115 ThunderBass Amplifier
Using the Biamp Capabilities – BX-440H:
About Biamping: The Biamp High and Low outputs of the BX-440H and the BX-4115 allow for a number of ways
to “biamp” your system: that is, using two amplifier/speaker combinations to share the task of reproducing the full
range of your bass. Biamping increases each amplifier’s efficiency by allowing it to “focus” on a certain frequency
range, rather than operating full range. The results of biamping include cleaner sound and more output power than
that of a single-amped system, which is especially useful during high volume live performances.
There are a number of different ways to use the BX-440H and the BX-4115 in biamp configurations. The examples
on the following pages show several biamp possiblities – you may find others. Your Crate dealer can assist you in
assembling the custom biamp ThunderBass rig to best suit your playing style and venue.
The Biamp Controls: The front panel Crossover Frequency
control (#15) sets the point where the low frequency signal rolls
off and the high frequency signal begins. This control is variable
from 100Hz to 1kHz. Adjust this control to best suit the fre-
quency range of your low frequency speaker cabinet. The
Crossover Balance control (#16) proportions the signal between
the high and the low output jacks (#26 and 27, rear panel).
Adjust this control for the most appealling blend of lows and
highs.
CROSSOVER
FREQUENCY BALANCE
300Hz
15
16
100Hz
1kHz
LO
HI
PREAMP
OUT
EFFECTS
LOOP
PREAMP
OUT
BX-220H
Example 1:
PWR AMP
IN
BX-220H
RETURN
SD
S
P
E
EFFECTS
LOOP
1
A
K
E
R
150W
220W
@
@
8
4
OHMS
OHMS
MIN. LOAD
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
LANCED
NE OUT
PWR AMP
IN
With the BX-440H and a BXE-18
RETURN
from
bass
BX-440H
CAUTION
DO NOT OPEN
RISK OF ELECTRIC SHOCK
cabinet for the low end; a BX-
220H and a BXE-410H cabinet for
the high end:
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
RAIN
R
I
S
K
OF
E
L
E
C
T
R
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S
H
O
C
K
,
D
O
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X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
O
R
MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1200W MAX
MODEL
/
120V
/
60Hz
BX-440H
3
SERIAL
#
SEND
AC LINE IN
1
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
S
P
E
BXE-410H
150W
220W
@
8
4
OHMS
OHMS
A
K
E
Plug your bass into the BX-440H, then:
(1) Run a shielded cable from the
biamp high out jack of the BX-440H to
the power amp in jack of the BX-220H.
@
4
7
-
1
4
6
-
0
4
M
Y
A
S
D
L
E
M
I
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R
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C
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T
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.
S
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.
A.
ICS
B
1
R
O
4
0
.
0
L
F
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U
G
U
M
S
O
O
N
6
A
V
3
E
3
.
S
E
R
I
A
L
#
MIN. LOAD
S
T
I
S
,
3
1
P
I
C
O
P
R
W
E
E
D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
ALANCED
LINE OUT
2
input
BX-440H
(2) Run a speaker cable from the
speaker out jack of the BX-220H to the
input jack of the BXE-410H.
(3) Run a shielded cable from the
biamp low out jack of the BX-440H to
its power amp in jack.
3
BXE-18
4
7
-
1
4
6
-
0
4
M
Y
A
S
0
D
L
F
E
M
E
I
E
R
N
L
G
T
E
U
,
H
C
S
M
E
T
O
O
U.S.A.
B
1
R
O
N
I
CS
4
0
N
6
A
V
3
E
3
.
S
E
R
I
A
L
#
S
T
.
L
O
U
I
S
3
1
P
I
C
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P
R
W
E
E
D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
(4) Run a speaker cable from the
speaker out jack of the BX-440H to the
direct in jack of the BXE-18.
4
direct
in
Adjust the Crossover Frequency and
Balance controls for the best sound.
2
4
TO
TO
BXE-18
BXE-410H
6
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BX-440H / BX-4115 ThunderBass Amplifier
Using the Biamp Capabilities – BX-440H (con’t):
Example 2:
from
bass
BX-440H
CAUTION
BX-440H
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
RAIN
R
I
S
K
OF
E
L
E
C
T
R
I
C
S
H
O
C
K
,
D
O
E
X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
O
R
MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1
1200W MAX
MODEL
/
120V
/
60Hz
BX-440H
SERIAL
#
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
3
With the BX-440H and a BXE-410H
cabinet for the high end; a mono (or
mono-bridged) power amp and a
BXE-18 cabinet for the low end:
SPEAKER
OUTPUTS
380
200
W
W
@
@
4
8
OHMS
OHMS
INPUT
power
amp
1
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
VIS:RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
WARNING:
T
OS
O
E
R
T
E
D
U
C
E
T
H
E
R
I
S
K
O
F
A
F
IN
I
R
O
E
R
O
R
ELECTRIC
O
C
K
,
DO
N
O
T
E
X
P
H
I
S
E
Q
U
I
P
M
E
N
T
TO
R
MOISTURE.
300 WAX
12
EL
SERIAL
#
3
BXE-410H
Plug your bass into the BX-440H, then:
(1) Run a shielded cable from the biamp
high out jack of the BX-440H to its power
amp in jack.
4
7
-
1
4
6
-
0
4
M
Y
A
S
0
D
L
F
E
M
E
I
E
R
N
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G
T
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U
,
H
C
S
M
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T
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.
S
N
A
1
.
A.
ICS
E
3
B
1
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4
0
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6
V
3
.
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#
S
T
.
L
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S
3
P
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W
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D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
2
input
SPEAKER
OUTPUTS
(2) Run a speaker cable from the speaker
out jack of the BX-440H to the input jack
of the BXE-410H.
power
amp
380 W @ 4 OHMS
200 W @ 8 OHMS
INPUT
(3) Run a shielded cable from the biamp
low out jack of the BX-440H to the input
jack of the mono power amp.
BXE-18
4
7
-
1
4
6
-
0
4
M
Y
A
S
0
D
L
F
E
M
E
I
E
R
N
L
G
T
E
U
,
H
C
S
M
E
T
O
O
U.S.A.
B
1
R
O
N
I
CS
4
0
N
6
A
V
3
E
3
.
S
E
R
I
A
L
#
S
T
.
L
O
U
I
S
3
1
P
I
C
O
P
R
W
E
E
D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
(4) Run a speaker cable from the speaker
out jack of the mono power amp to the
direct in jack of the BXE-18.
direct
in
4
2
4
Adjust the Crossover Frequency and
Balance controls for the best sound.
TO
TO
BXE-410H
BXE-18
from
bass
BX-440H
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BX-440H
Example 3:
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
RAIN
R
I
S
K
OF
E
L
E
C
T
R
I
C
S
H
O
C
K
,
D
O
E
X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
O
R
MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1200W MAX
MODEL
/
120V
/
60Hz
1
BX-440H
SERIAL
#
3
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
With the BX-440H and a BXE-18
cabinet for the low end; a BX-
210HP powered cabinet for the
high end:
BXE-210HP
1
500 WATTS MAX.
•
6
0
H
z
•
1
2
BXE-2P
A
MODEL
SERIAL
AC LINE IN
POWER
#
MADE IN THE U.S.A. BY SLM EENICS
1400 FERGUSON AVENUE ST. LO 63133
•
4
0
6
2
POWERAMP
OUTPUT
220 WATTS
CAUTION
–
HOT!
10
@
VOLUME
INPUT
4
MIN.LOAD
AC
OUTLET
RISK OF ELECTRIC SHOCK
DO NOT OPEN
100/120VAC: 250V
3
AVIS: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
WARNING: TO REDUCE THE RISK OF FIRE OF OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION
–
HOT!
Plug your bass into the BX-440H, then:
(1) Run a shielded cable from the
biamp low out jack of the BX-440H to
its power amp in jack.
500 WATTS MAX.
•
60 Hz
•
C
BXE-210HP
(2) Run a speaker cable from the
speaker out jack of the BX-440H to the
input jack of the BXE-18.
MODEL BXE-HP
SERIAL #
BXE-18
MADE IN THE U.S.A. BY SLM ONICS
1400 FERGUSON AVENUE
•
ST. LMO 63133
4
7
-
1
4
6
-
0
4
M
Y
A
S
0
D
L
F
E
M
E
I
E
R
N
L
G
T
E
U
,
H
C
S
M
E
T
O
O
U
.
S
N
A
1
.
A.
ICS
E
3
B
1
R
O
4
0
N
6
V
3
.
S
E
R
I
A
L
#
S
T
.
L
O
U
I
S
3
P
I
C
O
P
R
W
E
E
D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
4
0
6
(3) Run a shielded cable from the
biamp highout jack of the BX-440H to
the input jack of the BXE-210HP.
2
8
10
2
direct
in
VOLUME
INPUT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Adjust the Crossover Frequency and
Balance controls for the best sound.
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
AVIS:
WARNING: TO REDUCE THE RISK OF FIRE OF OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
2
CAUTION – HOT!
TO
BXE-18
7
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BX-440H / BX-4115 ThunderBass Amplifier
Using the Biamp Capabilities – BX-4115:
PREAMP
OUT
PREAMP
OUT
Example 1:
EFFECTS
LOOP
X-220H
PWR AMP
IN
BX-220H
RETURN
SEN
EFFECTS
LOOP
2
S
P
E
A
K
E
R
150W
220W
@
@
8
4
OHMS
OHMS
MIN. LOAD
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
BALANCED
LINE OUT
PWR AMP
IN
With the BX-4115 for the low end; a
BX-220H and a BXE-410H cabinet
for the high end:
RETURN
BXE-410H
2
SEND
4
7
-
1
4
6
-
0
4
M
Y
A
S
0
D
L
F
E
M
E
I
E
R
N
L
G
T
E
U
,
H
C
S
M
E
T
O
O
U
.
S
N
A
1
.
A.
ICS
E
3
B
1
R
O
4
0
N
6
V
3
.
S
E
R
I
A
L
#
S
T
.
L
O
U
I
S
3
P
I
C
O
P
R
W
E
E
D
S
R
H
A
C
V
N
D
L
8
R
I
O
N
H
E
G
M
Q
:
2
S
E
0
0
W
A
T
T
S
MODEL: CRATE BXE-18
M
A
N
E
E
:
O
S
O
R
F
U
N
C
Y
:
2
0
0
H
z
HIGH
OUT
DIRECT
IN
CROSSOVER
INPUTS
Plug your bass into the BX-4115, then:
(1) Run a shielded cable from the biamp
low out jack of the BX-4115 to its power
amp in jack. (Connection to the BX-
4115’s speaker is already made through
the factory-installed speaker out cable.)
S
P
E
A
K
E
3
150W
220W
@
8
4
OHMS
OHMS
@
MIN. LOAD
BALANCED
LINE OUT
-410H
from
bass
(2) Run a shielded cable from the biamp
high out jack of the BX-4115 to the power
amp in jack of the BX-220H.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BX-4115
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
RAIN
R
I
S
K
OF
E
L
E
C
T
R
I
C
S
H
O
C
K
,
D
O
E
X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
O
R
MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1200W MAX
MODEL
/
120V
/
60Hz
BX-440H
1
SERIAL
#
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
3
1
(3) Run a speaker cable from the speaker
out jack of the BX-220H to the input jack
of the BXE-410H.
TO
BXE-410H
Adjust the Crossover Frequency and
Balance controls for the best sound.
TO
BX-4115
Example 2:
PREAMP
OUT
PREAMP
OUT
EFFECTS
LOOP
X-2115
PWR AMP
IN
RETURN
BX-2115
EFFECTS
LOOP
With the BX-4115 for the low end; a
BX-2115 for the high end:
2
S
P
E
A
K
E
R
150W
220W
@
@
8
4
OHMS
OHMS
MIN. LOAD
MADE IN THE U.S.A.
BALED
LINT
BY SLM ELECTRONICS
PWR AMP
IN
RETURN
Plug your bass into the BX-4115, then:
(1) Run a shielded cable from the biamp
low out jack of the BX-4115 to its power
amp in jack. (Connection to the BX-
4115’s speaker is already made through
the factory-installed speaker out cable.)
SEND
2
S
P
E
A
K
E
150W
220W
@
8
4
OHMS
OHMS
@
MIN. LOAD
BALCED
LINUT
from
bass
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BX-4115
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
IN
TO
R
I
S
K
OF
E
L
E
C
T
R
I
C
S
H
O
C
K
,
D
O
E
X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
R
A
O
R
MOISTURE.
(2) Run a shielded cable from the biamp
high out jack of the BX-4115 to the power
amp in jack of the BX-2115. (Connection
to the BX-2115’s speaker is already made
through the factory-installed speaker out
cable.)
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1200W MAX
MODEL
/
120V
/
60Hz
BX-440H
BX-2115
1
SERIAL
#
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
BX-4115
1
Adjust the Crossover Frequency and
Balance controls for the best sound.
TO
BX-4115
8
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BX-440H / BX-4115 ThunderBass Amplifier
Using the Biamp Capabilities – BX-4115 (con’t):
Example 3:
500 WATTS MAX.
•
60 Hz
•
120 VAC
BXE-210HP
MODEL BXE-210HP
SERIAL #
BXE-210HP
With the BX-4115 for the low end; a
BX-210HP powered cabinet for the
high end:
A
MADE IN THE U.S.A. BY SLM ELECTRONICS
1400 FERGUSON AVENUE
•
ST. LOUIS, MO 63133
500 WATTS MAX.
MODEL
•
6
0
H
z
•
1
2
0
V
A
C
BXE-210HP
A
AC LINE IN
POWER
SERIAL
#
MADE IN THE U.S.A. BY SLM ELECTRONICS
1400 FERGUSON AVENUE ST. LOUIS, MO 63133
•
4
0
6
2
POWERAMP
OUTPUT
220 WATTS
4
0
6
CAUTION
–
HOT!
10
@
VOLUME
INPU
4
MIN.LOAD
AC
OUTLET
2
HOT!
RISK OF ELECTRIC SHOCK
DO NOT OPEN
100/120VAC: 250V
AVIS: RISQUE DE CHOC ELECTRIQUE. NE PAS OUR
2
8
WARNING: TO REDUCE THE RISK OF FIRE OF OIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR RE.
CAUTION
–
10
Plug your bass into the BX-4115, then:
(1) Run a shielded cable from the biamp
low out jack of the BX-4115 to its power
amp in jack. (Connection to the BX-
4115’s speaker is already made through
the factory-installed speaker out cable.)
INPUT 2
VOLUME
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE. NE PAS O
AVIS:
WARNING: TO REDUCE THE RISK OF FIRE OF TRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN TURE.
CAUTION – HOT
from
bass
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BX-4115
AVIS:
R
I
S
Q
U
E
D
E
CHOC
.
E
L
E
C
T
R
I
Q
U
E
.
N
E
P
A
S
O
U
V
R
I
R
WARNING:
T
O
R
E
D
U
C
E
THE
NOT
RAIN
R
I
S
K
OF
E
L
E
C
T
R
I
C
S
H
O
C
K
,
D
O
E
X
P
O
S
E
T
H
I
S
E
QU
IP
M
E
N
T
T
O
O
R
MOISTURE.
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
1200W MAX
MODEL
/
120V
/
60Hz
BX-440H
1
SERIAL
#
AC LINE IN
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
BX-4115
(2) Run a shielded cable from the biamp
high out jack of the BX-4115 to the input
jack of the BXE-210HP.
Adjust the Crossover Frequency and
Balance controls for the best sound.
1
TO
BX-4115
9
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BX-440H / BX-4115 ThunderBass Amplifier
Some Suggested Settings:
E Q U A L I Z A T I O N
MASTER
CONTOUR
5
4
6
4
6
3
7
3
7
2
8
2
8
1
9
1
9
0
10
40 100 225 625 1.6k 4k
8k 16k
CONTOUR
ON/OFF
LIMIT
OUT
E Q U A L I Z A T I O N
MASTER
CONTOUR
5
4
6
4
6
3
7
8
3
7
2
2
8
1
9
1
9
0
10
40 100 225 625 1.6k 4k
8k 16k
CONTOUR
ON/OFF
LIMIT
IN
E Q U A L I Z A T I O N
MASTER
CONTOUR
5
4
6
4
6
3
7
8
3
7
2
2
8
1
9
1
9
0
10
40 100 225 625 1.6k 4k
8k 16k
CONTOUR
ON/OFF
LIMIT
IN
E Q U A L I Z A T I O N
C H O R U S
SPECTRUM
DEPTH
RATE
MASTER
CONTOUR
5
5
5
250
4
6
4
0
6
4
6
4
6
3
7
3
7
3
7
8
3
7
2
8
2
8
2
2
8
CHORUS
ON/ OFF
1
9
1
9
1
9
1
9
10
10
0
10
0
FULL
500
IN
40 100 225 625 1.6k 4k
8k 16k
CONTOUR
ON/OFF
LIMIT
(4115 ONLY)
IN
10
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BX-440H / BX-4115 ThunderBass Amplifier
System Block Diagram:
INPUT
8 BAND
GRAPHIC
CONTOUR
ON / OFF
EFFECTS
SEND
GAIN
-15dB PAD
PEAK
LED
EFFECTS
BLEND
EFFECTS
RETURN
CHORUS
∑
LINE OUT
LEVEL
CHORUS ON
MASTER
POST
BALANCED
LINE OUT
BX-4115
ONLY
SPECTRUM DEPTH RATE
PRE
PREAMP
OUT
POWER
AMP IN
POWER
AMP
SPEAKER
OUT
LIMIT
LED
SPEAKER
OUT
HEAD-
PHONES
HEADPHONE
LEVEL
11
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BX-440H / BX-4115 ThunderBass Amplifier
Technical Specifications:
Maximum Input Signal Level Accepted
Input Power Requirements
Input Impedance
17 volts peak to peak (-15dB switch pressed in)
120VAC, 60Hz, 1200 watts max.
500k ohms (-15dB switch out), 75k ohms (-15dB switch in)
75dB typical
Signal to Noise Ratio
Output Power Rating
250 watts RMS @ < 5% THD w/8 ohm load, 120VAC line
440 watts RMS @ < 5% THD w/4 ohm load, 120VAC line
Gain @ 1kHz
EQ Section
67dB with EQ flat, Contour off
20dB range (±10dB) @ 40Hz, 100Hz, 225Hz, 625Hz, 1.6kHz,
4kHz, 8kHz and 16kHz
Internal Speaker
Size/Type
15” ThunderBass
Magnet
Voice Coil
Impedance
56 oz
3”
8 ohms
Size and Weight, BX-440H
Size and Weight, BX-4115
7-1/8”H1 x 19-1/2”W1 x 15-1/4”D, 42lbs.
23-5/8”H2 x 24”W x 15-3/4”D, 87lbs.
1including rubber feet
2without casters installed; casters add 1-3/4” to height
CRATE continually develops new products, as well as improves existing ones. For this reason,
specifications and information in this manual are subject to change without notice.
CRATE/SLM ELECTRONICS, A DIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON AVENUE, ST. LOUIS, MO 63133
47-593-01 • 06-96
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