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Proper size of the AC fuse for all countries is 3AG. Proper rating of the fuse is as follows:
Japan: 8 amp slo-blo
United States: 8 amp slo-blo
Europe (240V): 4 amp slo-blo
AC CORD RECEPTACLE
Accepts a standard AC power cable (supplied with the Bass 750), used with almost all current musical, profes-
sional and household electronic devices. If you misplace your AC power cable, a replacement can be found at
almost any computer. electronics, or pro audio store.
Note: The rating for this cable is 3 conductor, 10 amperes MINIMUM. If replacement is necessary, or if
you wish to buy a longer cable, look for the rating on the cable and be sure it is at least 10 amps. Make
sure the AC cord is plugged in all the way in both the amp and the wall socket. If your cord ever
becomes frayed or split, replace it immediately.
EFFECTS LOOP
The Effects Loop should accept any effect such as a chorus, flanger, etc. It is designed as a “side chain”
function and works exactly like that of studio consoles. Some effects units have an input level adjustment
switch. Whenever possible, set it at 0 dB. If that’s not an option, +4 dB is fine. The level going to your effect
is controlled by the Gain control on the front panel of the Bass 750.
Use of the Effects Loop should greatly reduce the noise generated by effects units (as compared to using the
effect between your instrument and the input jack). This is because the loop is after the preamp gain stages.
Note: The effects loop must be used in conjunction with the Effects Blend control on the front panel.
When that control is in the “dry” position, no effects will be heard.
All patch cords used with the Effects Loop should be as short as possible and should be routed as directly as
possible. Running patch cables over the top of the Bass 750 (as with any amplifier) can induce hum in the
cables.
SEND JACK
Run a shielded patch cable from the Bass 750’s “Send” jack to the INPUT of your effects unit. Output imped-
ance of the send jack is 100 ohms. This jack can be used as a line level output to connect a slave power
amp, such as SWR’s Power 750. It may also be used as an unbalanced record out.
RECEIVE JACK
Run a shielded patch cord from the Bass 750’s “Receive” jack to the OUTPUT jack of your effects unit. A
unique feature of the receive jack is that you can practice along with pre-recorded music. To accomplish this,
insert a tape recorder or other sound source into the “Receive” jack (make sure it is a MONO source). Using
the Effects Blend control, adjust the level of recorded music from the Receive to the “live” sound of your
instrument. The mixed sound will be heard through your speakers. This is an excellent way to practice along
with drum machines. Input impedance of the Receive jack is 27kohms minimum.
Note: Inserting a plug into the “Receive” jack activates the Effects Blend control. The control receives this
command through the ground created by the phone plug making contact with the jack. The plug must be a
mono plug (tip and ground). If you have a stereo plug only, tie the ring and the ground together.
PREAMP OUT JACK
The Preamp Out jack is a post-EQ output that allows a signal to be run to an external power amp (such as the
Power 750) or recording device.
SPEAKER FUSE
The speaker fuse is provided to protect your speakers in the unlikely event of a power amp failure or to protect
your power amplifier from incorrect speaker impedances or connections. Size and rating of the fuse is 10 amp,
fast blow. Do not defeat the purpose of this feature by using a higher rated fuse as it could void your warranty
and further damage your amp.
6 • BASS 750 USER GUIDE