[Heytree27]

Can the subs under the seat be used with a 2ohm amp?

[Heytree27]

Originally Posted by ctuna

There is no such thing as a amp rated in ohms.
The output of the amp is rated in RMS watts if it's a good one and there will be
distortion spec to.
You need to study some basic electronics.

That amp will deliver 75 at into 2 ohms load or less into 4 ohm load .
You will usually see both a 4 and 2 ohm rating in the amp manual .

Terms to know RMS power
peak power
distortion number at power .

look for articles on matching speakers to amps like this
https://audiointensity.com/blogs/car...ications-guide

Hey Ctuna: If I chose to keep the Logic 7 amp and used one of those cheap fiber optic decoder boxes, is it possible to connect a DSP ?

Example: helix mini DSP has optical/digital + RCA inputs and it also has RCA output.

The decoder box typically plugs into the Joying FR and FL out.

Is it possible to go this route:

Joying HU digital or RCA out> Helix mini DSP input (RCA/DIGITAL)> plug decoder box RCAs to Helix RCA OUT> Decoder box connects to logic 7 with most connection on side of box.

Would that work?

[ctuna]

Don't know nobody here has done that my initial feelings would be negative.
I don't think you are going to be able to time delays to separate channels because
those converters only give two channels in . control over separate channels would be the
issue and that is what DSP is for . (Delay and EQ)
I don't know if the converter would translate the DSP analog signal in an effective way.
A stand alone DSP is more like pre amp that means before the amp .

[Heytree27]

Originally Posted by ctuna

Don't know nobody here has done that my initial feelings would be negative.
I don't think you are going to be able to time delays to separate channels because
those converters only give two channels in . control over separate channels would be the
issue and that is what DSP is for . (Delay and EQ)
I don't know if the converter would translate the DSP analog signal in an effective way.
A stand alone DSP is more like pre amp that means before the amp .

Gotcha. Makes sense. I just didn't know if maybe it would help with the added sub in the trunk and EQ , even if only for the left and right sides.

[Heytree27]

Originally Posted by ctuna

Don't know nobody here has done that my initial feelings would be negative.
I don't think you are going to be able to time delays to separate channels because
those converters only give two channels in . control over separate channels would be the
issue and that is what DSP is for . (Delay and EQ)
I don't know if the converter would translate the DSP analog signal in an effective way.
A stand alone DSP is more like pre amp that means before the amp .

I looked into “2.1” stereo systems. From my understanding that is left+right+sub. So I looked deeper into whether not there are any good DSPs for 2.1 stereo systems in automobiles.

Then I came across the minidsp website. They sell what’s called the minidsp CDSP 8x12 v2.0

This DSP has optical input/rca input and rca output.

They have a webpage that goes over how to tune a 2.1 system with their software:

https://www.minidsp.com/applications/subwoofer-tuning/sub-integration-rew


This includes time delay, EQ, and crossover.

Then if I wanted to shell out more money I could but the minidsp with Dirac Live installed to give me autotune as well:

https://www.minidsp.com/applications/subwoofer-tuning/sub-integration-dirac?srsltid=AfmBOoqZeFrWQjP87FzQBQ_KulBLzYvkxqM8 mDN93hBRf8xq6YtqylOi

I know this doesn’t allow for me to tweak every speaker with the DSP- but I’m thinking it might achieve better sound quality than without.