16
Quad IV & VI
FRONT CONTROL PANEL
INPUT
Socket for the connection of a bass
GAIN
C LED to adjust the input level.
LED lights green
Minimum signal
LED lights yellow
Tube compression
QUADRUMATRIX
Rotary switch to alter the
basic character of the Quadruplet. Also alters the
operating frequencies of the tone controls. (For
frequency diagrams see below)
Q1 and Q2 are pure preamp signals. The Quad
VI offers with Q3 and Q4 a tube based power amp
(EL 84 and output transformer), which gives you
the sound of a full-tube amplifier. The Quad IV
simulates this by EQ-presets.
LOW BOOST
LED to Boost low
frequencies
BASS
Rotary control to Cut or Boost low
frequencies
MID 1
Rotary control to Cut or Boost low-mid
frequencies
SHIFT 1
LED to set the operating
frequency of MID 1
MID 2
Rotary control to Cut or Boost high-mid
frequencies
SHIFT 2
LED to set the operating
frequency of MID 2
TREBLE
Rotary control to Cut or Boost high
frequencies
HIGH BOOST
LED to Boost high
frequencies
PHONES
Headphone socket (min 200?).
MUTE
LED mutes all the outputs of the
Quadruplet except the PHONES socket and
simultaneously activates the TUNER OUT socket
(Rear Panel). When the MUTE switch is
depressed, the LED shines red. In an operation
ready state, the LED shines green.
POWER
On/Off switch for the Mains Power.
MASTER
Rotary control to determine the overall
volume.
REAR PANEL
MAINS IN
AC terminal with integrated fuse
compartment for connection to the mains power
supply
GROUND LIFT
Switch to separate the
grounding conductor from the audio signal
ground. When several devices are grounded to the
same point and interconnected with shielded
cables, a ground loop hum can result. If this
happens, depress the
GROUND LIFT
switch to
eliminate the hum.
TUNER OUT
Socket for a tuning device. The
pure bass signal is available at this socket when the
Preamp is switched MUTE.
LINE OUT
Output for connection to an external
power stage (post MASTER).
DI PRE/POST
When this switch is depressed, the
signal at the DI OUT socket is the pure bass signal
(PRE). Otherwise it is the signal after the tone
controls and any connected effects devices have
done their work (POST).
DI OUT
Balanced output for the connection to a
mixing desk (PA or Studio).
