Q4.80 / Q4.150 4-Channel Amplifiers - MB QUART Q4.150 Installation Manual

Q4.80 / Q4.150
4-Channel Amplifiers
4 Channel Full Range Stereo:
Interconnect cable checklist:
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.
Switch setting checklist:
- 1/2CH X-OVER: HP-FULL
- MULTIPLIER FREQUENCY: X1
- FILTER SLOPE: 12dB
- 3/4CH X-OVER: HP-FULL
2 or 3 Channel System:
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking
advantage of the mono bridging capability of all MB Quart amplifiers. In order to create
a 2 channel system, simply follow the example to also mono bridge channel pair 1/2.
Interconnect cable checklist:
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
with good quality RCA cables.
- A MONO signal source is required to bridge channel pair 3/4, such as would be
available from the mono sub bass output of an active crossover, whether standalone, or
built into a head unit or equalizer.
Important: Do not be tempted to connect the hot, or positive outputs, from any source
together to obtain a mono signal, as this could very well damage the output stage of
that source.
- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter
RCA cable.
MONO LINE INPUT
STEREO LINE INPUT
4
CLIP INDICATOR CLIP INDICATOR
AMBER- AMBER-
GREEN- SOFT CLIP GREEN- SOFT CLIP
PRE CLIP RED- PRE CLIP RED-
HARD CLIP HARD CLIP
LEVEL LEVEL
9V 0.2V
9V 0.2V
BASS BOOST
BASS BOOST
0dB 12dB 0dB 12dB
BASS FREQUENCY
MULTIPLIER
FREQUENCY
30Hz 80Hz
X15 X1 HIGH PASS
FILTER SLOPE
6dB 12dB
15Hz 1KHz
CHANNELS 1&2
CHANNELS 3&4
HIGH PASS LOW PASS
(x1) 20Hz 300Hz 40Hz 4.5KHz
(x15) 300Hz 4.5KHz
CROSSOVER
CROSSOVER
LP-BP LP-BP HP-FULL
DUPE HP-FULL
MONO STEREO
(3&4)
INPUT MODE
PROTECT
POWER
4CH 2CH
CLIP INDICATOR CLIP INDICATOR
AMBER- AMBER-
GREEN- SOFT CLIP GREEN- SOFT CLIP
PRE CLIP RED- PRE CLIP RED-
HARD CLIP HARD CLIP
LEVEL LEVEL
9V 0.2V
9V 0.2V
BASS BOOST
BASS BOOST
0dB 12dB 0dB 12dB
BASS FREQUENCY
MULTIPLIER
FREQUENCY
30Hz 80Hz
X15 X1 HIGH PASS
FILTER SLOPE
6dB 12dB
15Hz 1KHz
CHANNELS 1&2 CHANNELS 3&4
HIGH PASS
LOW PASS
(x1) 20Hz 300Hz 40Hz 4.5KHz
(x15) 300Hz 4.5KHz
CROSSOVER
CROSSOVER
LP-BP LP-BP HP-FULL
DUPE HP-FULL
MONO STEREO
(3&4)
INPUT MODE
PROTECT
POWER
4CH 2CH
INPUT MODE: 4CH since 2 sets of RCA's are connected.
Control checklist:
- Refer to the section "Settings for Best Performance"
Minimum final loudspeaker impedances:
- 2 ohm per channel.
- Connect the mono speaker positive terminal to the Ch3 +, and its negative terminal to Ch4 - as
shown.
Switch setting checklist:
- 1/2CH X-OVER: HP-FULL
- MULTIPLIER FREQUENCY: X1
- FILTER SLOPE: 12dB
- 3/4CH X-OVER: LP-BP MONO
INPUT MODE: 4CH, Stereo Left and Right to CH1&2 and MONO to CH3&4
Control checklist:
- Refer to the section "Settings for Best Performance"
Minimum final loudspeaker impedances:
- 2 ohm per channel in stereo mode.
- 4 ohm mono bridged.