Problems with new headunit installation

Alexdc

Good morning everyone,

Sorry I am posting this again with more details. Pioneer AVH 3300NEX without much success. At first I wired up everything I did in my previous head unit on other cars. I got noticed that I got to the point in the blue wire to get the amp in my limited to power up. Got some sound but it is very thin and super low at max volume. It is not listable. Something is wrong. Then I noticed the sticky threads (from the US forums). Do I need to interchange the wires with the red or the yellow? I tried the latter and now my headunit does not even power up.

Please help me. I have been clueless about my problems with the last few days. When I put the stock back on everything works as it should.

Thank you kindly,
Alex

Markus

Hi Alex,

i don't know the Pioneer AVH 3300NEX in detail, so i downloaded the owners manual: https://www.pioneerelectronics.com/StaticFiles/Ma…anual051718.pdf

Does your AVH 3300NEX have the optional integrated power amp? If not, how did you connect the output of the AVH 3300NEX to the input of the Infinity amp? Chinch to Input? That won't work well, because the Infinty amp is designed for a high-input signal from a hu power amp.

If you used chinch out, next step should be checking if you configured a full-range signal in the AVH 3300NEX as output signal. But as said above, that won't be a sufficient input signal for the Infinity amp.

Regards, Markus

Alexdc

I did not know that there was an optional integrated power amp?

Markus

Hi Alex,

i didn't know that too, but the user manual says there is an optional power amp available. So if the AVH 3300NEX doesn't have an integrated power amp, it's no wonder that the signal is too low.

The stock Infinty / Becker radios have an integrated power amp. It's been driven by a Philips TDA8569Q chip which generates 4x 40 Watts. So the input of the Infinity amp wants to see at least 2x 40 Watts.

One option would be to get the amp module for the AVH 3300NEX. Another option would be to get a small stereo amp with chinch in and line out that generates around 2x 40 watts RMS and sits between the AVH 3300NEX and the stock Infinity amp.

Regards, Markus

Alexdc

It says built in amplifier MOSFET 50 W x 4.

Do I need this?

https://www.crutchfield.ca/p_142SLC4/Scos…-Converter.html

Markus

Hi Alex,

so how did you connect the AVH 3300NEX to the Crossfire Infinityamp. Via Chinch-out of the AVH 3300NEX or via speaker outs of the AVH 3300NEX?

Regards, Markus

Alexdc

I used this harness with the chinch out (rca?).

https://www.amazon.ca/gp/aw/d/B0007W…g?ie=UTF8&psc=1

Straight from an harness to the headunit harness. Will this make the Amp work?

Markus

Hi Alex,

no, that won't work, because the chinch (rca) output signal of the AVH 3300NEX is way to low for the Infinity amp. As said above the Infinity amp was designed to get 2x 40 watts from the Infinity radio as an input.

I'm not shure if your AVH 3300NEX has an integrated power amp (manual says no, Pioneer website says yes – i don't know).

If yes, you need to connect the speaker outputs (power amp out) of the AVH 3300NEX to the input of the Infinity amp. The infinty amp was designed to get 2x 40 watts as an input signal. So 2x 50 watts from the AVH 3300NEX would be OK.

Else you need an 2x 40 watts amplifier with chinch in. You connect the chinch out of the AVH 3300NEX to that amp. And than you connect the speaker out of that amp to the Infinity amp.

I know it sounds crazy, that you need an amp to power an amp, but the Infinity amp has high power inputs only.

Regards, Markus

Alexdc

Ok. It's weird because someone with the same head unit said they used the chinch of the head unit straight through the stock amp.

It says that my headunit output is 4v. I don't understand why it would need a power amp.

It also says that the built in amplifier outputs 50w

Markus

Hi Alex,

so somebody said something on the internet. Wow, i'm impressed.

As said above, the Infinity radio output is 40 watts. The input sensitivity of the Infinity amp is designed for 40 watts. 4 volts is not 40 watts.

If your AVH 3300NEX has an integrated amp with 50 watts, why don't you connect the AVH 3300NEX speaker output to the Infinity amps input?

Regards, Markus

Alexdc

I plug it on the harness? Isn't it hooked up to the amp already?

Markus

I don't know how you've wired the Pioneer head unit to the Infinity amp in detail. You know what you did. I'm not a clairvoyant.

You've said you've used a rca / chinch out adapter to connect the head unit to the amp. I said that won't work and you have to connect the head unit speaker outputs to the amps input.

So, what exactly is your problem?

Regards, Markus

Alexdc

Where are the amp inputs? Where is the amp?

I plugged the rca with the rca of the harness. No need to be a clairvoyant.

Markus

The Infinity amp only has inputs for 2 channels. You've connected the rca outputs to the amps inputs. So just connect the power amp outputs to the same inputs you've connected the rca outputs to.

Regards, Markus

Alexdc

I don't need a power amp. It works now. Thanks. My head unit has a built in amp has specified earlier.

If it is two channel only? Is it usually powering the rear speakers only?

Markus

The Infinity amp is a 6 channel amp with 2 inputs. 2 channels got to the front speakers. The other 4 channels go to the subs in the rear. The subs are double coil speakers, so every coil get its own output channel.

The Infinity amp has an integrated processor with an active crossover. So it handles the frequency crossover for the subs and the front speakers. The front speakers are a 2 way system. The tweeters are cut off by a simple cheap 4.7 uF electrolytic capacitor. So defintely no rocket science there.

Just do me a favour, use google translator and read this: Carhifi im Chrysler Crossfire

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