Channel Selector
The Quad AMPBUS system carries channels for normal stereo signals as
well as the centre, subwoofer and rear channels required for AV
applications.
The rotary switch on the back of the amplifier should be used to select the
appropriate channel. These channels are:
CH1
Stereo Left
CH2 Stereo Right
CH3 Rear
Left
CH4
Rear
Right
CH5
Centre
CH6 Subwoofer
The INPUT setting selects the RCA phono input. This setting should be
used only when the amplifier is used with non-Quad 99 series equipment.
System connections using AMPBUS and the 99 Stereo Power Amplifier
Each amplifier has two AMPBUS sockets on the rear panel. Plug an
AMPBUS lead into the upper socket of the amplifier. The other end should
be plugged into the AMPBUS socket of the Quad 99 preamplifier or AV
processor which will be sited above the units.
System connections using AMPBUS and the 99 mono Power Amplifier
Under normal circumstances, two 99 mono amplifiers will be used as the
left and right channels respectively of a stereo installation, as part of a Quad
99 system.
Place one amplifier on top of the other.
Each amplifier has two AMPBUS sockets on the rear panel. Plug an
AMPBUS lead into the upper socket of the upper amplifier. The other end
should be plugged into the AMPBUS socket of the Quad 99 preamplifier or
AV processor which will be sited above the units.
The other AMPBUS lead is connected between the lower AMPBUS socket
of the upper amplifier and the upper socket of the lower amplifier so that
you have a daisy chain. AMPBUS sockets are alternately male and female
so this should be relatively straightforward.
Note: Always check that the channel selector has been positioned correctly.
Bi-Amping for Mono or Stereo Amplifier
The AMPBUS system is both simple and versatile. By using the AMPBUS
system, you can add two more 99 mono amplifiers for bi-amping. As all
Quad 99 series amplifiers are gain matched, you can use a pair of 99 mono
amplifiers in combination with a Quad 99 stereo power amplifier. When bi-
amping, remember to have the channel switch set to the correct channel.
7