[JPrieur]

I am in the middle of doing my install. A/D/S tech support has told me two different things:
1. One guy told me that the diff output from the HU can be spliced into the DIN adapter they give you with the amp

2. Another one told me that you need a converter

Whats correct. I would like to avoid the ven 4, has anyone installed diff to a p650.2 amp directly to the din input. Whats the deal here???

 

[SpaceMonkey]

I'm pretty sure you need the VEN4. I'm also putting in a/d/s equipment, and am planning on getting one.

This is based on what I found here and here.

I remember I did read somewhere that you wouldn't need a Vendetta, but the above two posts make more sense to me.

Any reason why you don't want to use it?

 

[SrCsTc]

http://peripheralelectronics.com/periph_products/cd_changer_autos/instructions/ven4_4.5.pdf

 

[HaN-hAn]

i am not familiar with the model amp u are going to use, but any middle and upper range A/D/S amp made in the last year and a half or even two, should accept the signal from the head unit directly.

the reason why you would want to do this, is because keeping a balanced signal from HU to AMP gives greater signal integrity, making for better SQ.

 

[Hota]

Use the Ven4 - it converts the differential signal to ground reference and takes out the noise that may have entered on the way from the head unit to the trunk.

HaN-hAn makes a point, but the amp doesn't take out any induced noise since it never converts to ground reference. Just make sure your Ven4 wiring is as short as possible leading to your amp.

 

[SpaceMonkey]

Use the Ven4 - it converts the differential signal to ground reference and takes out the noise that may have entered on the way from the head unit to the trunk.

HaN-hAn makes a point, but the amp doesn't take out any induced noise since it never converts to ground reference. Just make sure your Ven4 wiring is as short as possible leading to your amp.

Okay, I think I'm catching on (I'm just starting to learn about car stereo systems). So you could use a mini-DIN adapter to take the balanced HU signals directly into the amp, but may introduce noise.

Doesn't the HU use balanced signals instead of standard RCA's to eliminate noise? If so, that must mean the H/K (or stock) amp converts to ground reference, but the a/d/s amp does not.

Correct?

 

[Hota]

Okay, I think I'm catching on (I'm just starting to learn about car stereo systems). So you could use a mini-DIN adapter to take the balanced HU signals directly into the amp, but may introduce noise.

Doesn't the HU use balanced signals instead of standard RCA's to eliminate noise? If so, that must mean the H/K (or stock) amp converts to ground reference, but the a/d/s amp does not.

Correct?

You got it. Any intoduced noise is removed by the factory amp or any amp that takes differential inputs.

Differential signal voltages are centered around a certain level so if external noise gets into the system, it will no longer be centered around that voltage. The factory amp corrects this thereby removing the noise.

Yes, I think you could trick the amp to think you're using ground reference signals with your mini-DIN adapter, but the noise might be horrendous.

The Ven4 adapter does the trick nicely.