T H E S O U N D T H A T C R E A T E S L E G E N D S
BXR 300C
BXR 300R
,
Owners Manual
P/N 040294
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FRONT PANEL DESCRIPTIONS
The front panel contains all items necessary for system
(E) MID: - Can be used to add or subtract the frequency range
operation and observation. Please read this section of the
manual carefully to make sure you understand all the
operational features of your new Fender BXR 300. The Front
Panel is similar for both the 300R and 300C.
set by MID FREQUENCY control.
(F) MID FREQUENCY: - Adjusts the frequency of boost or cut
by the MID control.
(A) INPUT: Two inputs are provided;
(G) BASS - adjusts the low frequency part of spectrum, the
Input 1 - High gain
area where the "deep" fundamental reside.
Input 2 - Low gain
The high gain input (INPUT 1) should be used for most
instruments. This input can handle as much as 3.5 volts
R.M.S., while the low gain input (INPUT 2) accepts 7 volts
R.M.S. without audible distortion. For both cases this is
greater than any active bass with a 9 volt battery can
produce. if you are using a bass with dual 9 volt batteries, or
a "hot" passive bass it might be wise to try input 2. For the
rare case where two players want to use one amplifier, or
where two instruments are to be used during the
performance, both inputs may be used.
(H) PREAMP OUT: The preamp jack is a source of signal as it
appears at the power amp input. This jack can be used as a
"LINE OUT" or as a "SEND" point for an external effects
device.
(I) POWER AMP IN: Use of this jack allows the default input
signal from the preamp to be replaced by an external source,
(usually the "return" from an effects device).
(J) DELTACOMP™: With this button in, DELTACOMP™ is
active, in the out position, DELTACOMP™ is deactivated,
and a special ASYMMETRIC LIMITER circuit is enabled. The
LED next to this button indicates that the power amplifier has
reached full power and that either DELTACOMP™ or
LIMITING has occurred, depending which position that the
switch is in. The unit may seem louder without DELTACOMP™
since the power amp will be allowed to go into clipping. With
DELTACOMP™ on, your volume level will be rather loud
before the compressor turns on; this is normal.
(B) ENHANCE: HIGH ENHANCE provides high frequency
boost. LOW ENHANCE provides low frequency boost, while
eliminating sub-sonic noises below 40 Hz.
(C) VOLUME: This control sets the gain of the preamp and
serves as an adjustment for the "loudness" of the amplifier.
(D) TREBLE: - adjusts the high frequency part of the spectrum.
Turning the treble up will cause the sound to become
"BRIGHT" or more "CRISP".
(K) POWER: Turns the BXR 300 on or off.
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REAR PANEL DESCRIPTIONS
(L) SPEAKER: Speaker connections are four ohms minimum.
(N) POWER RATING: This indicates how much power the
amplifier can "draw" from the wall socket when the amplifier
is at full power (1200VA). The marking directly below
indicates what the wall socket Voltage and frequency must be.
Incorrect line voltage will damage your amplifier and VOID
THE WARRANTY!
The two jacks are wired in parallel. The BXR 300 is not
designed for speaker impedance lower than 4 ohms total.
(M) TWO SPEED FAN: The two speed fan normally runs at low
speed, and will automatically go to high speed when things
get loud. High speed operation during high level performance
is quite OK. If you suddenly reduce your level, the fan speed
(if high) may take a while to return to low (normal) speed. Do
not block air flow to the rear of the amplifier.
(O) LINE CORD: The line cord should be connected to a
suitable power source, with the correct voltage and frequency,
as shown in the power rating at the amplifier rear (item N
above). if your not sure check some other piece of equipment
in your area. DO NOT ALTER THE AC PLUG.
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FIGURE 1 is a common connection favored by the bassist who
wants extremely high level. it should be noted that two 15”
speakers have 50% more cone area than one 18” speaker.
SUGGESTED FIRST TIME OPERATION
If this the first time you’ve used a FENDER BXR 300 we
suggest that you try the following first time control setting
procedure.
FIGURE 2 is an example of two FENDER BXR 410 ‘s
connected in parallel.
Be sure the speaker is connected with a speaker cable (not an
instrument cable) and the line cord is plugged into a suitable
power source. If you own a BXR 300C, the internal 15 inch
speaker will already be connected.
FIGURE 3 shows a BXR 115 and a BXR 410 connected in
parallel, which provides a well balanced wide range
arrangement.
FIGURE 4 illustrates one FENDER BXR SPECTRUM system
operating in full range mode. With it’s 18” woofer, the
SPECTRUM is ideal for five string bass.
Depress the two “ENHANCE” buttons and turn the VOLUME
to zero (7 O’CLOCK) and the TREBLE, MID, MID
FREQUENCY, and BASS to “0” (12:00 O’CLOCK), and
DELTACOMP™ off. With your instrument connected, press the
power rocker switch to “ON” The RED PILOT lamp will
illuminate, and the fan in the rear panel will begin to rotate
slowly.
PARALLEL SPEAKERS
When speakers are connected in parallel, as in the example
of FIGURE 1, 2, and 3 above, the impedance of two equal
systems will halve. impedance of equal impedance systems
will have a new impedance equal to the individual identical
impedance divided by the number of systems. The minimum
for the FENDER BXR 300 is 4 ohms, there is no maximum (if
no speakers are connected, no harm will result).
Advance the volume while playing a few notes on the bass.
Experiment with the controls to become familiar with the
features that are available to you.
SETTING UP EXTERNAL SIGNAL PROCESSING
MECHANICAL OPTIONS
External signal processors may be used as previously
described. Devices used with the preamp out, power amp in
may be set up as follows:
For those users who will not be “rack mounting” their BXR
300R we have provided the option of removable rack ears.
with the rack ears removed, an optional strap handle kit may
be installed. If you should use a handle kit other than
FENDER, be sure that the mounting screws protrude no more
than 1/ 2 inch past the mounting plane (underside) of the
handle.
Connect the “PREAMP OUT” to the input jack of the effects
device, and the “POWER AMP IN” to the output jack of the
effects device. Read the owner’s manual for the device as
required. if you get no sound when the device is in the “IN”
mode, you may have the wires to the external device crossed
(exchanged) or the device may not be turned on.
If you decide at a later time to re-install the rack ears, make
sure that you use the same screws that were originally
supplied.
SUGGESTED SPEAKER ARRANGEMENTS
WITH BXR 300R
There are an almost infinite number of speaker setups
possible, what with the variety of speaker systems available.
We will attempt to describe four typical situations.
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SPECIFICATIONS
POWER AMPLIFIER SECTION:
Power output
300 Watts
Rated load impedance
Distortion at rated power
Damping factor, at 4 Ohms
Power bandwidth
4 Ohms
Less than .05%
Greater than 100
20 Hz - 20 kHz
1.33 volt R.M.S.
>10k Ohms
Input sensitivity
Input impedance
Slew factor
Greater than 1
-100 dB Re/ 300 Watts
20 dB
Signal to noise ratio
DELTACOMP™ range
PREAMP :
Input impedance:
Input 1 > 100k Ohms
Input 2 > 800k Ohms
Sensitivity:
Volume at max., enhance
buttons out, all equalization
controls at 12 o'clock, power
amp at 300 Watts, 4 ohms
Input 1 < 10mV
Input 2 < 20mV
Equalization range:
Enhance:
Low +9dB at 80 Hz.
High +12dB at 5kHz.
Bass:
Treble:
Mid:
+/ - 14dB at 40 Hz.
+/ - 17dB at 5kHz.
+/ - 20 dB at 150 Hz through 4kHz.
Overall signal to noise ratio, volume at min.,
-95 dB below
rated output
PHYSICAL SPECIFICATIONS:
BXR 300R
Width (rack ears installed)
19 inches
17 inches
3.5 inches
10.125 inches
19 lbs.
Width (without rack ears)
Height
Depth
Weight
BXR 300C
Width
21-7/ 8 inches
Height
29-11/ 16 inches
15-5/ 8 inches
Depth
Weight
78 lbs.
Speaker
1 -15" Fender Special
Design (part number 027577)
A product of:
FENDER MUSICAL INSTRUMENTS
1130 Columbia Street, Brea, California
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