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To use this feature, connect a shielded patch cord from the Tuner Out jack on your 750x to the input jack on
your tuner. Turn the amplifier on and you're ready to go. If you do not wish to monitor your sound during the
tuning process, you may turn down the Master Volume or set the Speaker On/Off switch to "Off".
Effects Loop (for external effects devices)
As mentioned previously in the "Effects Blend Control" section of the manual, the Effects Blend circuit in
your 750x is similar to that used on recording consoles, with the effects loop on a "side chain" to the nor-
mal circuit. Unless the Effects Blend control is set to the full "wet" position, you will always get the full
sound of your instrument AND get the diversity an external effects unit offers. Use of the effects loop will
reduce the noise generated by external effects units (as compared to using the effect between your instru-
ment and the input jack, though many people use it in this fashion anyway). This is because the loop is
after the preamp gain stages.
The Effects Loop is compatible with most individual or multi-effect external effects devices. Many effects
devices on the market have input level adjustments. For instance, some units have a switch that you can
set for either –20 dB or +4 dB. In all cases, these should be set for 0 dB (if available) or +4 dB. The level
going to your effect is controlled by the Gain control on the front panel.
Note: The Effects Loop is used in conjunction with the Effects Blend control on the front panel.
When the 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 750x 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 750x—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 750x 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 750x. 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 Overdrive or SubWave™
effects onboard your 750x. It is used only in conjunction with an external effects device.
Effects Send
This jack's primary function is to send a post-EQ-and-Overdrive/SubWave™ signal to an external effects
device for use in the 750x 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 750x, 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
750x 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 750x is now a power amp only.
750x • 17
