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Discussion Starter · #1 ·
Ok, say you have a HU with one set of RCAs, how do you hook 2 amps to this? One for subs and one for speakers?

Ok, HU has a front and a rear set of RCAs, one could be used for speakers and the other for the sub right?

Last question, a HU has a set of front and a set of rear RCAs, and a subwoofer RCA. Now the sub RCA is only one plug, not 2 like the front/rear RCAs. How does this work? Ive talk to a couple shops in town and they were all like WTF when I asked this.
 

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you really dont need two rca coming off the deck for sub out. the two rca setup is typically left and right output. If they deck your using only has one rca for the subwoofer (amp) then all you'd need to do is connect it to either of the rca's on the amp. You could also get a Y-splitter rca to turn the single into 2 rca's for the amp, this way should gain some sound/db

im no audio expert so i could be completly wrong :crazy:
 

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Discussion Starter · #3 ·
im no audio expert so i could be completly wrong :crazy:
Yes you are because if you only have one RCA coming into the amp, the sound is cut in half. That happened when one of my RCAs broke off.

The splitter seems like it should work but my luck it would burn up everything in the car. Anyone know for sure?
 

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Ok, say you have a HU with one set of RCAs, how do you hook 2 amps to this? One for subs and one for speakers?
Most amps have a passthrough...you just run RCA's from the deck to the input of the first amp, then from the passthru on the first to the input of the second. If you don't have anything like this, you can just run a splitter on each RCA channel.

Ok, HU has a front and a rear set of RCAs, one could be used for speakers and the other for the sub right?
Yes. Just use the crossovers on the amp or HU to cut off the portion of the signal you don't want to play on each particular amp.

Last question, a HU has a set of front and a set of rear RCAs, and a subwoofer RCA. Now the sub RCA is only one plug, not 2 like the front/rear RCAs. How does this work? Ive talk to a couple shops in town and they were all like WTF when I asked this.
Just run a splitter off the sub output RCA and into each channel on the amp. There's really no reason to run bass in stereo on your everyday setup, so running one sub output from the deck is just a shortcut that the MFG can make to save a little bit of $$.
 

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Discussion Starter · #5 ·
Ok, thank you sir. You answered all my questions.

I had always though thats what the passthrough was for but wasnt 100% sure. Someone told me it was to run 2 of the same type amps off of.

Looks like Ill pick up a splitter soon too.
 

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its like that on my panasonic indash, only 1 rca for the sub and i had to get a y rca adapter to hook it up
 

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many decks have a single rca sub out. a y splitter works just fine. if a deck only has one set of rcas, you can get either a line out convertor such as a PAC SNI15 or an amp with high level inputs to run off of your speaker outputs of the deck. if the deck has front and rear, you can use a set for sub and a set for highs. you just need to be sure your deck or amp has at least a low pass filter or use a crossover if they dont.
 

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Sure hope you're not buying from them.

On the mono sub output from the head unit: If the amp is mono, you don't have to have a y-adaptor. The input on the amp is mono too. If you'd read the owner's/installer's manuals they'll tell you that.
 

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If you offered me the most expensive Jensen in the world, I'd say keep the damn thing. Poopy is right.
 
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