rcas into monoblock

[accuab 10+ year member]

So I'm looking at getting a hifonics hfi 1000d monoblock. I was reading on the hifonics website and it shows for the rca input to the amp. it says that for a unbalanced input ( rca left and rca right) to use a rca y-adapter off one of the channels to the inputs of the amp. Is this needed for a monoblock amp? It just seems weird that you would want to lose one channel of your bass. Isn't the left and right just summed up inside the amp anyway? I've only used 2 ch before for subs and never had came across this before. Any help on this is appreciated.

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[brandinooooo 10+ year member]

Hmmm...I've never heard of an amp only using one side of the input. Can you link it?

 

[accuab 10+ year member]

http://www.maxxsonics.net/manuals/hifonics/pdfs/Hifonics%20HFi%202010%20Amplifier%20Manual.pdf

There's the link to the manual. It's on page 6 of the numbering on the pdf at the bottom. On the slider at the right it's page 8. The diagram showing this is at the bottom.

Don't think it matters but I'm using a loc to keep the factory head unit.

 

[brandinooooo 10+ year member]

Its if your using a mono output where your only using the one side of the rca. You use the splitter so that both channels are being used on the amp and are getting the same signal.

Most likely this won't apply to you. Morethan likely your HU has normal rca output (left & right)

 

[accuab 10+ year member]

Its if your using a mono output where your only using the one side of the rca. You use the splitter so that both channels are being used on the amp and are getting the same signal.
Most likely this won't apply to you. Morethan likely your HU has normal rca output (left & right)

I have the l and r. But the diagram shows doing that for a full range stereo line input. It is showing for a dedicated mono input that the adapter is not needed. Just doesn't make sense because it has rca out to send to a full range amp, but with either of their diagrams it wouldn't make sense to attach an amp after that with only having mono input.

 

[brandinooooo 10+ year member]

Since you have both l and r channels you don't need to worry about that. Just plug in the rca's in the l and r channel like you normally would and call it a day.

 

[IonRL205 10+ year member]

You'll be fine just plugging your RCAs into just normal. It's saying use a Y adapter if you want use full range stereo output, you're not going to be running the amp like that, you're going to be running it mono so just plug it in normal. It's the same as any other mono amp. Don't pay any attention to the diagram. Full range is assuming you are going to be using it to run door speakers...etc and will have a wider range of frequencies.

 

[kramer_212 10+ year member]

just use a 2 chan rca and set you stereo for the woofer on mono

 

[accuab 10+ year member]

Does it change anything that I'm keeping the stock hu. I'm using a local from the left and right rear channels. So everyone is in agreement just to plug both left and right fda into the amp and be done with it.

 

[brandinooooo 10+ year member]

If you mean a LOC then yep your good to go

 

[accuab 10+ year member]

Yea I meant loc. Phone changed my word. I had thought just to hook the rcas like normal but the diagram from hifonics just confused me. Since I had never used a monoblock before I wasn't sure.

 

[Bettr n' Revrse 5,000+ posts]

There are a few amps out that use only one input for a sub channel... My Memphis big belle for instance...

 

[brad02420 10+ year member]

Sorry to thread hijack but I'm thinking about getting the Hifonics BRE1600.1D. I have a very similar question so I figured I would post it here.

My HU has a sub input. It's a wire about 4-6in. long with a female rca on the end.

So would I need the Y-adapter that it shows in that diagram to plug into the female rca on my HU?

 

[accuab 10+ year member]

From what I can tell you'll be fine just running the rcas like normal. Mine sounds good with having the l and r hooked up like normal coming from the loc