Directed Electronics A1200/4 - Manual (Page 24)

QBASS/QBASS PLUS SPECIFICATIONS
QBASS TM ( A600/4 )
Up to 18dB of boost centered at 40Hz, with a Q-factor of 2.
QBASS PLUS TM ( A1200/4 )
Up to 18dB of boost with selectable center frequency at 30Hz, 36Hz,
44Hz or 60Hz, with a Q-factor of 2.
Optional QBASS REMOTE TM ( A1200/4 )
This boost control can be mounted in the dash and will supersede
the boost control on the amplifier endplate.
QBASS PLUS
On the A1200/4 amplifier, we’ve taken bass control to a higher level
with QBASS PLUS TM . The two QBASS TM switches (labeled 1 and 2)
on the front end of the amplifier allow you to select one of four
frequency centers 30Hz, 36Hz, 44Hz and 60Hz. On the rear end
plate you will find the
QBASS TM level control and plug-in for an
optional QBASS REMOTE TM dash mounted level control. Adjust the
level control clockwise for up to +18dB of boost at your selected
frequency.
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