Hello I have a 2001 p38 an the radio comes on but no sound... I hear a clicking sound coming from the sub area ...can anyone help me figure out what happen an how to fix it plz 🙏🏻
Hi Marty,The DSP amp controls everything in the later models - whilst the subwoofer has it's own amp, the actual feed to it comes from the head unit, and then into the DSP amp - where it's processed (the level is boosted/attenuated as required) before then being fed into the subwoofer amp.
As Richard says - pressing the music note button will scroll through the head unit options and there should be a DSP one there - with the options being "OFF, Spatial, Driver".Hi Marty,
I've just spent a few hours reading all your posts and they're great. Just one question - how do you know if you have a DSP amp model vehicle or if the amps are in the doors...you mention later models? (Its pouring here in Aus so I can't pull of doors trims just yet to see if there are amps there). My P38 is 11/2000 and my goal is to just replace the Alpine head unit with something newer with bluetooth/usb support.
That is true for the UK and US market I suppose but it does not apply eveywhere.Oh, also, most DSP vehicles had factory nav fitted - so if you don't have that, then I would have a hunch that you'll have door amps.
Ok great, I'll be removing it this weekend and I'll check it out. I can't scroll through the options because its a dead unit atm. But I don't have sat nav either so my money's on my P38 having door amps.As Richard says - pressing the music note button will scroll through the head unit options and there should be a DSP one there - with the options being "OFF, Spatial, Driver".
Another way to tell is to release the head unit and pull it out. On DSP versions the audio output ISO block will only have 4 wires in it instead of 8 (as the DSP unit only takes a left/right feed and then mixes it for each door, models with amps in the doors have 8 wires for 4 outputs - one to each door, and the head unit does the mixing internally). Also on DSP versions, then mini ISO connectors at the top of the head unit will have a pink/black wire coming out of the green on - which is the communication line to the DSP amp. If there isn't a pink/black wire and 8 wires in the audio ISO, then you'll have door amps. Pink/black wire, and 4 wires in the audio ISO and it's a DSP version.
Oh, also, most DSP vehicles had factory nav fitted - so if you don't have that, then I would have a hunch that you'll have door amps.