Active Input Jack
The Active input jack should be used with instruments having a built-in (on board) preamp or other sound
sources that will produce output levels greater than 1 volt RMS. The number of bass manufacturers has
increased significantly over the years, and it?s impossible to try and keep track of them all. Generally, if you
have very ?hot? pickups and/or tone controls installed in your instrument, and you use them to boost the level
of your bass signal 10 dB or more, you may find the Active input more compatible. The best judge is your own
ears.
If you?re using a keyboard or bass pedal with the 350x, we have found the best choice to be the Active input.
Note: Using the Active input with passive basses (active instruments will always employ a battery) may
result in a loss of high end transients. Players who roll off their high end starting at about 2kHz, or prefer a
?darker? sound, may find this input more to their liking.
If you hear some distortion with your active bass and are using the Active Input, make sure the preamp clip
LED indicator is not lighting. If the preamp stage is not being driven into clipping, replace the battery in your
instrument.
Gain Control
The Gain control adjusts the volume of the preamp section. Since the Gain control is similar to a ?pad,? a
small amount of signal will be heard even with the Gain control rotated fully counter-clockwise (?MIN?) if the
Master Volume is up.
After all EQ settings and the Aural Enhancer are set, the Gain control should be raised until the preamp clip
LED barely flashes when your loudest note is struck. This will insure maximum signal to noise ratio and pre -
vent unwanted clipping of the preamp section.
Note:The Gain can serve as an EFFECTS SEND LEVEL ADJUSTMENT. If your effect is being
overdriven, turn down the Gain control and readjust your Master Volume for overall loudness.
Preamp Clip LED
The preamp clip LED will light whenever the preamp, tone section or output buffer reach clipping (run out of
headroom). This function does NOT monitor the first tube stage of the Passive input. See that section for
more info.
In the event the clip indicator lights, turn down the Gain control. Since this circuit monitors the tone controls,
boosting any one of them can cause the clip LED to activate. Once again, you may leave the tone control at
its desired level, but turn the Gain control down further.
Note:Even though the Preamp Clip LED lighting indicates that at some point the preamp is clipping, no
harm is being done to your amplifier. However, clipping of the power amp can cause damage to your
speakers and is not recommended.
Aural Enhancer
The Aural Enhancer is a feature that?s been on just about every SWR amplifier since the company?s inception
in 1984, and is a trademark part of the ?SWR Sound? people have come to know and love. It was developed
to help bring out the fundamental low notes of the bass guitar, enhance the high-end transients, and reduce
certain frequencies that help ?mask? the fundamentals. The ultimate result is:
1. A more transparent sound, especially noticeable when slapping and popping.
2. It can make a passive bass take on an ?active? type of quality when set at positions of ?2 o?clock? or fur -
ther clockwise.
Let?s take a second to learn how the Aural Enhancer works. Think of it as a variable tone curve that changes
depending on where you set the Aural Enhancer control knob. As you raise the control clockwise from the
?MIN? position, you are elevating a whole range of sound (lows, mids, and highs) at a variety of frequency
points selected specifically because they?re different than those selected for the individual Tone Controls.
This remains true up to about the ?2 o?clock? position. This position - a favorite for many users - brings out
both the low end fundamentals and crisp highs and, at the same time, adds a little lower midrange to help cut
through the band. However, if you go further clockwise and past the 2:00 position, selected mids will start to
drop off - specifically, a group of frequencies centered around 200 Hz. At this point and after, the effect
350x OWNER?S MANUAL ? 5 |
ACEC
