SWR Sound Bass Combo Amplifier - Manual (Page 12)

Effects Blend Control is in the full counter-clockwise (“DRY”) position, no effects will be heard. This is
normal.
CONNECTING AN EXTERNAL EFFECTS DEVICE TO THE BLACK BEAUTY EFFECTS LOOP
Obtain two high-quality shielded patch cables, preferably as short as possible. Route them in the most direct
way possible. (Running patch cables over the top of the Black Beauty—as with any amplifier—can induce
hum in the cables and is not recommended.) Take one cable and connect it from the Effects Send jack on
the Black Beauty to the input of your external effects device. Take the second cable and connect it from the
output of your external effects device to the Effects Return jack on your Black Beauty. To set levels, follow the
instructions as previously listed in the “Effects Blend Control” heading under “Front Panel Features.”
And, just so there isn’t any confusion, the Effects Loop has nothing to do with the SubWave™ effect onboard
your Black Beauty. It only is used in conjunction with an external effects device.
EFFECTS SEND
This jack’s primary function is to send a post-EQ-and-SubWave™ signal to an external effects device for use
in the Black Beauty Effects Loop. However, it can also be used as:
1. A line level output for use in conjunction with an additional (slave) power amp—such as SWR’s
Power 750.
2. An unbalanced output suitable for recording or live mixing board purposes.
The output impedance of the Effects Send jack is 100 Ohms.
EFFECTS RECEIVE
This jack’s primary function is to complete the Effects Loop circuit by routing the post-external-effects device
signal back into the power amp of the Black Beauty, where it can be blended back in with the original signal
by using the Effects Blend control on the front panel. However, it can also be used as:
1. A power amp input jack. If, for some reason, you wished to bypass the entire front end and use
the Black Beauty strictly as a power amp, you could take the output of whatever line-level audio
source you wished and connect it to this jack. Then, set the Effects Blend control to the full clockwise
(“WET”) position. Use the Master control to set the overall level, and your Black Beauty is now a
powered speaker cabinet.
2. An input for pre-recorded music, for playing along and practicing purposes. To accomplish this,
insert a CD player or other sound source into the Effects Receive jack. (It must be a MONO 1/4" plug
that goes into this input, so you’ll have to use a stereo-to-mono cable adaptor of some kind.) You can
adjust the level of recorded music versus the “live” sound of your instrument by using both the Effects
Blend control (the more clockwise the control, the more pre-recorded music
signal you’ll hear) and the volume control of your CD (or other) audio source. The mixed sound will be
heard through your speaker(s). Besides pre-recorded music, this is also an excellent way to practice
along with a drum machine.
Input impedance of the Receive jack is 27k Ohms minimum.
NOTE: Inserting a plug into the Effects 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, it will be necessary to tie the
ring and the ground together.
SubWave™ ACTIVATOR FOOTSWITCH
Your Black Beauty comes equipped with the capability for hands-free control of the SubWave™ effect. To
achieve this function, locate the footswitch included in your Black Beauty packaging. Connect the cable to the
SubWave™ Footswitch jack on the rear of your Black Beauty. Turn the effect on and off by stepping on the
switch; the illuminated switch above the SubWave™ Level control on the front panel should alternate on
(blue) and off, and the effect should engage and disengage accordingly.
NOTE: The type of switch contained inside the footswitch chassis is momentary, normally open. If you
connect the footswitch to the unit while the unit is on, the SubWave effect may engage. This
is normal.
10 • BLACK BEAUTY OWNER’S MANUAL