MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Sat Nav and Car Audio => Topic started by: biffobear on April 28, 2012, 08:57:32 pm

Title: alpine head unit, amp problem
Post by: biffobear on April 28, 2012, 08:57:32 pm

i fitted an alpine head unit, and have now fitted an amp in the boot. so i have connected the rca wiring the heavy duty live and earth, and blue wire from head unit for a switchable live. on the head unit i went into settings and set power ic to off, should this now power the  speakers from the amp?, but when i do it no sound comes out. help please

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 12:34:51 pm

any hi fi gurus out there?

Title: Re: Re: alpine head unit, amp problem
Post by: Nickyboy on April 29, 2012, 12:43:25 pm

I've fitted many head units and amps in my cars, mostly Kenwood and Alpine, quality goods. And the hole in the passenger footwell in civics makes wiring an amp a doddle. Not so easy is feeding the amp cable under the plastic sill covers and into the boot remaining hidden. Some people suggested I feed the cables under the car...oh how i lolled. That's just a blown battery waiting to happen.
Thankfully those days are long gone, now I simply upgrade the head unit and i'm done. Once you start fettling with amps etc, it goes on forever and ever.
Nope, call me old fashioned, but a HU upgrade is enough for me nowadays.

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 12:50:46 pm

take it you have ran the speaker wires of the amp

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 01:14:00 pm

I thought that the rca,s from the amp to the head unit was all thats required?

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 01:31:28 pm

Quote from: biffobear on April 29, 2012, 01:14:00 pm

I thought that the rca,s from the amp to the head unit was all thats required?

http://www.caraudiohelp.com/how_to_install_a_car_amp/how_to_install_a_car_amp.htm

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 01:36:43 pm

does that mean ihave to start pulling the interior apart again to run speaker cables to the amp?

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 01:38:40 pm

afraid so--its the part i hate having to hide all the wires--the rca put a low level signal into the amp,which then as its name suggest amplifier the sound

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 01:44:50 pm

is there a connector i can use behind the head unit for the speaker wiring so that i dont have to start hacking the loom?

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 01:47:50 pm

Quote from: biffobear on April 29, 2012, 01:44:50 pm

is there a connector i can use behind the head unit for the speaker wiring so that i dont have to start hacking the loom?

yes thier is but what i did was run my own and did it that way but its a pain to do or connect into the orig wiring

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 01:56:03 pm

well thats my job for next weekend, i was hoping that i would not have to but, i connected a speaker to the output on the amp and it worked ok, so thanks for the help.

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 01:59:47 pm

what header unit have you got in--

Title: Re: alpine head unit, amp problem
Post by: biffobear on April 29, 2012, 02:07:45 pm

its one i have used for about 8 years, alpine 7892r.

Title: Re: alpine head unit, amp problem
Post by: Andy on April 29, 2012, 03:21:13 pm

Quote from: biffobear on April 29, 2012, 02:07:45 pm

its one i have used for about 8 years, alpine 7892r.

excellent h/u :happy2: