n00b amp sub question...

[Slaugh 10+ year member]

hey i have a 9815 hu and an old alpine 2channels amp connected to the sub out of the hu and finally a 12" sub connected to the bridge of the amplifier...

well the thing is i was using the balance to test the front stage speakers and i found the sub to die as i moved the balance to the right... but it worked perfectly if i moved it to the left... well i thought the right sub pre-out had been killed or soemthing.. but then i reminded the sub out on the HU was set to mono as well as the amplifier was set to mono...

so i started playing with the amp and the hu settings... there are two settings possible for the sub out in the hu (MONO and STEREO)... and on the amp there is MONO, STEREO and 1+2....

i was thinking, which one should it leave it on?

i noticed if i don't set the amp to mono it accepts input on the right chanel input... does it make a difference from any of the settings possible? i wasnt able to testify and increase, but at least amp stereo didnt let the sub die when i moved the balance...

any recomendations?

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[Prowler573 5,000+ posts]

Multi-channel amps (whether they be 2ch or more) running in bridged mono mode use the input from the left channel only (positive hooked up on the left and negative hooked up on the right)

I don't know why there would be a stereo or mono output option for your sub preouts (but I'm sure someone who does will be along shortly) but as far as the amp goes those settings do the following:

Stereo: Outputs the signal as it is presented to the amp. The left RCA input gets amplified and output on the left channel and likewise for the right.

1+2: It combines the signal from both the left and right RCA input and outputs that combined signal on both channels

Mono: For running in bridged mono mode (this is the setting you'll want to use) the amp will take the left RCA input only, multiply the output by whatever percentage that amp increases output in bridged mode and sends the output to the sub(s)

 

[Slaugh 10+ year member]

hmmm

well i realized the sub works on the amplifier bridge regardless of the way it's set on the amp/hu...

so i should leave as Mono/Mono?

 

[slicks5150 10+ year member]

hmmm
well i realized the sub works on the amplifier bridge regardless of the way it's set on the amp/hu...

so i should leave as Mono/Mono?

yup.