QUAD AMPLIFIER
6
QD-4240/4480/4960, QX-4960
3. SPEAKER OUTPUT TERMINALS
These five-way binding posts are used to connect speakers to the unit. Do not connect the two outputs of a
single channel by connecting them together, or in parallel with any other amplifier.
Speakers may be connected in Stereo or Bridged Mono mode. Pleaser refer to the illustrations below.
- STEREO MODE - BRIDGED MODE
4. MODE SELECTOR
Use this switch to select the amplifier’s mode of operation.
- STEREO MODE
In this mode, each channel operates independently, with channels 1 and 2 operating as a stereo pair, and
channels 3 and 4 operating as a second stereo pair. In this mode the minimum speaker impedance is 4Ω.
- BRIDGED MODE
In this mode, all four channels are bridged together and function as a single mono amplifier. In this mode
the minimum speaker impedance is 8Ω. (Note that in this mode the volume controls for channels 2 and 4
are inactive.)
- PARALLEL MODE
In this mode, channels 1 and 2 operate as two separate mono amplifiers. In this mode the minimum speaker
impedance is 4Ω. (Note that in this mode the volume controls for channels 3 and 4 operate identically to the
volume controls for channels 1 and 2.)
5. CROSSOVER MODE SWITCH (QX-4960 ONLY)
This switch selects the operational mode of the built-in crossover circuitry.
- BYPASS: Select this setting when using the amp in bridged mono mode. The crossover is not used.
- X-Over: Select this mode when running in bi-amped mode. Amp channels 1 and 3 are used for high
frequencies, channels 2 and 4 are used for low frequencies. Crossover frequency range is 60Hz ~
250Hz.
- X-Over x 10: In this mode the crossover frequencies from 60Hz to 250Hz or from 600Hz to 2.5kHz are
chosen by the Crossover Frequency Adjustment switch (6).
IMPORTANT: To prevent speaker damage, switch off the power before changing Crossover Mode.
The TRS connectors are wired as Tip as hot (+),
Ring as cold (-), and sleeve as ground, as shown
below.
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