tion with the level of the clean “Channel One.” How do you control the level of “Channel One?” By using
the Gain Control, which controls the level of the clean bass signal in the preamp.
Also, the EQ Controls are located after the Overdrive circuitr y, so they can have a drastic effect on the
distorted tone. (The treble control is especially useful for adding or removing a nasty edge to your
Overdrive sound.) And don’t forget about the Limiter, which, when dialed higher than you might think nec-
essar y, is often useful in combination with distor ted signals to create warm, smooth overdriven tones.
Finally, if you engage the effect and both the Drive and Level controls are set to minimum, there will be
little or no change in your tone. This is normal.
SubWave™ Controls
Once again, based on the circuit from SWR’s Mo’ Bass, the SubWave™ on your 750x is a lightning-quick
sub-octave wave engine with tracking superior to other models of sub-octave ef fects currently on the mar-
ket. In plain terms, it hears the note you play and immediately generates a signal one octave below it—all
the way down to low “C#,” “C,” or even low “B” on some basses!
SubWave™ Activator Switch
Located directly above the SubWave™ Level Control, this is an illuminated push-button switch that acti-
vates the SubWave™ effect. When engaged, the switch cap will illuminate in blue. Push once to engage,
then again to disengage. (The SubWave™ effect can also be switched on and off via footswitch; please
see the heading titled “Effects Footswitch” in the “Rear Panel Features” section later in this manual.)
SubWave™ Level Control
Once the SubWave™ effect is engaged, you can use this control to determine the amount of effect to be
blended in with your original (“clean”) bass signal. Turning the control clockwise will increase the amount
of effect, while turning the control counter-clockwise will decrease the amount of effect. When the control
is set fully counter-clockwise to “MIN”, no effect will be heard, even though the effect is engaged and the
Activator switch is illuminated in blue. This is normal. Also, when the control is set fully clockwise to
“MAX”, the “clean” bass signal will still be present…along with plenty of sub-octave effect. As always,
your ears and the desired musical application will be the best judge in setting this control.
(Keep in mind that the Bass Level control will have a significant impact on the perceived level of the
SubWave™ effect as well, as it follows immediately after the SubWave™ in the signal chain. Please read
below.)
Balancing Levels When Using Both Onboard Effects
If you wish to use the Overdrive and Subwave™ effects at the same time, here’s something you should
know. The Gain control effects the level of the Subwave™ effect, but it does not affect the Overdrive. So, if
you’re balancing the overall Overdrive signal against the clean sound, it’s worth remembering that if you
turn the Gain Control down, you’re also reducing the amount of Subwave™ present in the final blended sig-
nal. Basically, when it comes to setting levels for using both effects at once and switching back and for th
between sounds, you have three controls you can adjust: the Gain Control, the Overdrive “Drive” Control,
and the Subwave™ Level Control. Experimentation is encouraged.
750x – ACTIVE TONE CONTROL SECTION
Bass Control
The Bass control employs a shelving-type circuit and boosts or cuts the bass re/–15dB, from
about 30 Hz to 100 Hz, centered at around 80 Hz. Star ting at the control’s mid-position (“center-click”),
turning the control counter-clockwise cuts the bass response, and turning the control clockwise boosts the
bass response.
You’ll find that the Bass Level control will boost or cut the SubWave™ effect along with the “clean” bass
signal; that’s because of the range of frequencies covered by this particular control. You can use both the
Bass and SubWave™ Level controls to get a good balance between how much bass you want in your clean
sound, and how much of a bass boost you want when engaging the SubWave™. Some users will want a sig-
nificant boost, while others may be striving for a more consistent level (or “unity gain”). Again, let your ears
and musical taste be the judge.
750x OWNER’S MANUAL • 7
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