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[ryan_u89]

Hi
My sub isnt working when i play a CD but is when the radio is on?? i cant work out wots wrong with it, all the settings on CD player are the same when its on radio.
any ideas?
cheers
ryan

[Priezti]

is it a fairly old sony unit by any chance

[ryan_u89]

well it is sony. but its quite a new one i think. could it be something not wired up?

[dontpannic]

Sounds like your particular head unit only outputs a feed to the auto antenna when the radio is on rather than CD, for the blue remote wire. Put it on a switched feed with the ignition, or if the head unit has one, an amp output. More than likely have to go with the ignition switched feed though...

Nick

[ryan_u89]

wots an ignition switched feed. im not so good on that so can i have it dumb terms please. the blue remote wire...

[dontpannic]

wots an ignition switched feed. im not so good on that so can i have it dumb terms please. the blue remote wire...

Ignition switched feed is something that comes on when the ignition is on. I don't know where to find one unfortuneatly but someone on here will.

The blue wire coming from your headunit to the amp/sub controls when the amp should be on (i.e. when the head unit is on). What most people do is connect the blue wire to the "Electric Antenna" feed, which on some cars pushes up the aerial when the head unit is on.

Unfortunatly some sony's switch this feed off when the radio is not on - playing CD's.

Another way to do it is buy yourself a switch, and bring the blue wire from the battery, into the switch, then out to the amp, then you have a switch at the front of the car for the amp...

Hope this helps,
Nick

[Jay]

When the headunit is in the CD setting.. switch 'AF' on

Basically.. someone has connected the amplifier remote turn on lead to the electric antenna turn on wire. The 'AF' function turns the aerial on and off so if you switch it on when in CD mode it should be fine

[dontpannic]

When the headunit is in the CD setting.. switch 'AF' on

Basically.. someone has connected the amplifier remote turn on lead to the electric antenna turn on wire. The 'AF' function turns the aerial on and off so if you switch it on when in CD mode it should be fine

I thought AF was Automatic Frequency - where you move throughout the country, the radio searches for the strongest frequency for that particular PI. I've got mine connected to the Auto Antenna with AF off and mine works a treat...

Nick

Edit: Knew it:

# Alternative Frequency. The AF flag contains information about a station's other FM frequencies, so that the radio can switch to a better signal whilst driving.

Its a part of RDS, nothing to do with turning the aerial on and off...

http://www.radioandtelly.co.uk/rds.html

[Jay]

Yeah thats what I always thort.. but there is an AF wire coming out the back on my sony headunit.. and If I switch AF on or off on the headunit then it switches my amp on and off..

I did mine on purpose so I couldt switch the sub on and off at the touch of a button etc...

[dontpannic]

Yeah thats what I always thort.. but there is an AF wire coming out the back on my sony headunit.. and If I switch AF on or off on the headunit then it switches my amp on and off..

I did mine on purpose so I couldt switch the sub on and off at the touch of a button etc...

Hmm, very odd! Maybe when AF is enabled its searching for stations in the background and enabling the output...?

[ryan_u89]

thx for the help but i got it sorted...the guy who had this guy before me wired it up weird! i just had to find the remote lead and plug it into that blue wire coming out the back of my headunit sayin REM 0.3max or something...works fine now...cheers