Stock radio clipping while using high-level input to amp

[Sizzlechest]

First a little background. I previously had my system running fine with a MTX Re-Q (LOC), crossover, and my previous amp. My prev amp only accepted low level input so I needed the LOC. I wanted remote sub level\gain control so I was using the crossover (my old amp didnt have this feature). I had all 3 devices mounted on an amp rack which was consuming space in my trunk.

I decided I would reduce my devices and buy an amp that both accepts high-level input and has a remote gain control, so I went with the Soundstream RUB1.1000D http://soundstream.com/store/car-audio/amplifiers/rubicon/rub1-1000d.html

The amp accepts high and low-level inputs. The amp has one set of RCA input jacks which are used for both types of input, with a switch to select the type of signal being inputted. The switch has 2 settings, either [.1 to 2v] or [2v to 8v].

I set it to 2v to 8v, and when my volume gets to a bit over half, the highs (powered directly by my HU) start clipping. Are there some headunits that cannot work with high-level inputs? Is there any way to get around this issue without using the MTX Re-Q? Can I used a passive LOC instead?

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[CSCStang]

Switch to the lower level and see what happens. A loc will give you more to work with if that doesn't work as far as adjustments.

 

[Sizzlechest]

Same happens on both power levels, except with the rca mode the gain is good very low.

This source that I'm tapping into is what goes into a factory amp to power door speakers. I am not sending the signal into the stock amp because those speakers make my doors rattle.

 

[CrossoverOre 10+ year member]

if you get a passive loc that should fix you up.

 

[DonH 5,000+ posts]

you should be set to .1-2v not the other... also did you adjuct the gain level accordingly on the knob? the switch acts as a buffer really. switched between two gain POT's

 

[Sizzlechest]

Yes, I've tried both switch settings with the gain at various locations. It just obviously gets much louder on the wrong setting. Clipping occurs with both.

So instead of the passive LOC, I'm guess the MTX Re-Q is better? It's 12V powered and restores bass that the HU may reduce at high output? It also has a gain pot\setting so I can properly set the gain on my amp.

 

[Jaz1068]

Not sure if you've already solved your problem with the clipping, but I figured I'd respond anyway. It's always best to place your lineout between the factory and the speakers. In some systems, the output from the radio that inputs a factory amp are extremely sensitive. Your lineout ( assuming it isn't a high quality one) could be increasing the load on the radio making it malfunction.

Placing it on the output side of the amp is better. If you still have the same problem, try getting a better Lineout, I usually only use one make by Metra and Pac.

Hope this helps,

Jaz