INPUTS
The The INPUT JACK (2) connects your instrument to channel 2, and accepts either a balanced XLR input (in case your gui -
tar’s pickup supplies a balanced output) or an unbalanced
GAIN and MASTER
There are three knobs on the front panel of the AC601/AC101 acoustic amplifier that control the volume of your instrument.
The GAIN (3)(4) control determines how much signal is passed through the preamp stage of the unit, which includes equa-
lization and the effects loop. The MASTER (17) volume regulates how much output comes out of the power amp into your
cabinet.
If playing through the amp causes the blue CLIP (5)(6) light to turn on at all, you should turn down the GAIN (3)(4) control
to avoid distortion.
When you first plug into the amp, start with the GAIN (3)(4) and MASTER (17) controls set at their lowest levels, in other
words turned all the way counter-clockwise. Then, turn your instrument’s volume up to its full level and play as hard as
you do in your most aggressive moments, and turn up the GAIN (3)(4) control until the blue light starts illuminating. Next,
back off on the GAIN (3)(4) just enough so that the light stays off as you play. This method will result in the optimal gain
setting for the instrument you’re playing. Different guitars have different output levels, mostly depending on their pickups
and onboard preamp and EQ settings.
Once you’ve set the GAIN (3)(4) level, use your MASTER (17) knob to control the volume of your instrument.
EQUALIZATION
The AC601/AC101 acoustic amplifier is designed to faithfully reproduce the natural sound of your guitar. If you have a good
instrument, very little equalization (EQ)-if any-should be required. Acoustic guitars produce a very wide range of frequen-
cies, and all of them need to be conveyed in order to amplify the true sound of the instrument.
Since the AC601/AC101 has been designed to give you clear, detailed and musical sound at all frequencies, when the amp
is set “flat”-with all EQ knobs at 12 o’clock-you should hear a very true mirror of the sound of your guitar and its pickup.
However, if and when equalization is required, you will find this amp’s EQ to be powerful and musical.
The LOW EQ (7) (8) control the level of low frequencies. This means that it either boosts or cuts the volume of the frequen-
cies around 40 Hz, to a maximum of 16 decibels, (see the EQ curves on page 10).
The MID EQ (9) control (available on channel 1 only) boosts or cuts the frequencies around 600 Hz, by as much as 16 decibels.
4
5
The HIGH EQ (8) control boosts or cuts the high frequencies, by as much as 16 decibels.
VPF FILTER
The AC601/AC101 features a filter that alters the equalization of your signal with specially formulated musical results. The
VPF (10) (Variable Pre-shape Filter) boosts lows (around 35 Hz) and highs (around 10 kHz), and cuts mids at 380 Hz. This
filter can only be applied to channel 2.
EFFECTS
The AC601/AC101 offers six onboard preset EFFECTS (15) to sweeten your sound: Chorus 1, Room (reverb), Reverb 1, Reverb
2, Hall (reverb) and Chorus 2.
The EFFECT MIX knobs (13) (14) control the balance between the dry signal and the effected signal. With the effect mix con-
trol in the “off” position, you will hear no effect. At the “max” position, you will hear only effect and no dry signal. You
cannot select a different effect for each channel, but you can control how much effect is applied to each channel, using
the effect mix knobs.
LINE OUT LEVEL
The LINE OUT (16) knob allows you to control how much signal comes out of the LINE OUT output (24) on the rear panel.
This is useful in live situations, when the sound engineer may ask you to provide more or less signal to the PA.
2.2 Acoustic Amplifier Rear Panel
SPEAKER OUT
The AC601/AC101 can be connected to one or two speaker cabinets. The high-quality Neutrik SPEAKON COMBO jack (23) accepts either a
SPEAKON or a The AC601/AC101 delivers 150W of power into an 8 ohm cabinet, or 250W into a 4 ohm cabinet.
By default, the AC601/AC101 head is connected to the speaker cabinet housed in the combo. However, you can either connect the head
to a separate, external cabinet (unplug the
