DEH-P4500mp Pioneer HU Question

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tmstl

Member - Posts: 12

Joined: March 24, 2004

Location: United States

Posted: March 24, 2004 at 10:55 AM / IP Logged

I have a Pioneer DEH-P4500MP HU. At the moment, I have my amplifier connected to a LOC that is connected to the HU's RT RR and LT RR speaker wires. It sounds great in this configuration. When I connect the RCA cables to the HU's rear RCA connectors, it seems as if I lose a lot of volume and bass. Is this normal? Should I have it repaired? ANy help would be much appreciated.

Thanks,

Tim

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: March 24, 2004 at 12:05 PM / IP Logged

You are driving one amp using an LOC off the speaker level signal and another amp off the RCA line-level signal, and one of the levels is affected by the other one? If this is what you're saying than no, it's not normal.

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tmstl

Member - Posts: 12

Joined: March 24, 2004

Location: United States

Posted: March 24, 2004 at 4:14 PM / IP Logged

No, I'm sorry, I was not clear. I am only running 1 amp to my subs. The rca cables come from my amp to the LOC which is connected to the RR speaker level outputs of my HU. It sounds great in this configuration.

The issue is when I remove the RCA cables from the LOC and attach the RCA cables to the RR RCA outputs of my HU the volume & bass is much lower. At this point, nothing is using the RR speaker level outputs.

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DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: March 24, 2004 at 4:18 PM / IP Logged

Gotcha. The difference is only because the voltage output from your HU line level pre-amp is lower that that being produced from your LOC. All you have to do is set up your amp (set the gain) for the levels from the line outs. The line-outs should give you a much cleaner signal, by the way.

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tmstl

Member - Posts: 12

Joined: March 24, 2004

Location: United States

Posted: March 24, 2004 at 4:34 PM / IP Logged

Excellent! BTW, what is the best way to verify what the gain setting is on the LOC so I can match it on my amp?

Thanks for the help. You guys rock!!!

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Clean Install

Silver - Posts: 446

Joined: January 03, 2004

Location: United States

Posted: March 26, 2004 at 8:06 PM / IP Logged

DYohn..?..might his trouble be that the rca's are the non-fading and are not turned on? just a thought had a friend that ran rca's back and did not have the NF control turned on

though i guess he is using his RR output

If we learn from each success and

each failure, then we can improve ourselves

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DEH-P4500mp Pioneer HU Question

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