Do I need an Amp ?

[J4CKO]

Replaced the head unit in my MK1 TT with a Pioneer decless BT job, rear speakers dont work and the Bose amp pops when you change channel, was thinking I could just rewire the lot so the head unit drives the speakers directly or will that sound poor ?

The speakers are 6.5 inch ones so not massive, may replace them, are amps generally for bigger speakers and subs ? dont really want a sub.

[InitialDave]

Asked a friend who had a similar generation A3 and had to deal with the oddities of how Audi set up the sound system:

"check he plugged in the Canbus as that's what I needed to do and also connect the in and output rca's. The RCA thing is really really unobvious, [my headunit] came with a canbus unit"

Sounds like you need an adaptor kit for the factory loom.

[ZX10R NIN]

Go onto the Connects2 website & they'll sell you the correct lead that will fire up the amp.

[J4CKO]

I think its working but it pops as the changes, just front speakers so the amp may be goosed, think it was on the oem stereo.

Was thinking I may just hook the head unit to the speakers but not sure if it will provide enough power to the speakers.

[DuraAce]

Don't the factory bose speakers run a different impedance to non bose? 2 vs 4 ohm or something like that as I recall?

[Willber]

Hi Jacko,

You need this adapter

http://www.halfords.com/technology/car-audio/stere...

Also you need a 'ground loop isolator' which sits inline from the head unit RCA connectors into the adaptor RCA. Also you dont need to connect all the plugs from the factory wiring into the adaptor. The yellow and red bullet connector connections also need switching round (yellow to red instead of red to red) otherwise it will power up but will not have fixed live to save your settings. I have the same car and fitted a Pioneer stereo and ended up with this setup and it works fine. If you get totally stuck I could upload some pics for you.

Also im sure you're aware the 1.8t is notorious for slight boost and vacuum leaks at this age so its worth looking into those pipes, I have replaced most of mine so far. Also does your car revs rise when flooring it and dipping clutch to change gear? Mine did and turned out to be the clutch pedal switch - worth checking. There is a great MK1 TT page on Facebook too.

Hope that helps

Edited by Willber on Thursday 23 November 17:45

[J4CKO]

Cheers Willber !