Fender Stereo Amplifier BXR 300C User Manual

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  
 
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.  
 
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.  
 
 
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 its 18” woofer, the  
SPECTRUM is ideal for five string bass.  
Depress the two “ENHANCEbuttons and turn the VOLUME  
to zero (7 OCLOCK) and the TREBLE, MID, MID  
FREQUENCY, and BASS to “0(12:00 OCLOCK), 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 OUTto the input jack of the effects  
device, and the “POWER AMP INto the output jack of the  
effects device. Read the owners 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.  
 
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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