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Gents: Need some advice on a stereo upgrade. Sorry for the long post, but I figured I should give you all the info.
Found at the u-pull (all circa 2005ish, but looks to be in good order):
I definitely don't need all this power. I don't plan to run a sub. I don't listen to hip-hip, rap, etc so bass is not my thing. But, you really can't listen to the stock system very well on the road in a 'vert with the top down... volume has to be way up and the sound quality suffers. I'm guessing that running a large amp at low watts into good speakers would get me much better quality.
Questions:
- Power: The amp pulls up to 54A fused 30A X 2. So, I'd need to run directly off the battery. Is this a serious load on the alternator or battery? As in battery or charging system damaging? I'd guess only be using something like 15 -20 watts a channel at most I'm guessing. So I don't expect to be pulling a lot of current. Advise me.
- Hookup: I'd like to run with a similar to stock configuration where the dash is high freq (no choice, domes), the doors are bass (and maybe some mid?), and the rears are either bass (stock limit?) or full range. I'd like to be able to use the fader per stock. Is it doable? The amp has some switchable and adjustable HP/LP/Flat filtering, but I'm guessing that my issue is more of trying to find full range feed for the rear, not filtering it out. Has anyone modded the stock radio to remove the filtering and get full signal to the rears?
Lastly... is it practical to tap into the stock wiring? I don't mean the physical part, but can I use the DIN feed to the AS3 amp and run that to the front (door) channel? Or should I pull the output from the AS3 amp and send that back since that's the signal level I will get from the rears coming out of the stock radio? Maybe feed pre-AS3 front input (unfiltered) with the amp level input set high and the rear with the input level set low? But, what happens with the dash domes then? Give me some direction.
Thanks,
Found at the u-pull (all circa 2005ish, but looks to be in good order):
- Doors: Polk DB5250 5.25" packaged with dome tweeters Polk Audio db5250 5-1/4" component speaker system Certified for marine use at Crutchfield
- Rears: Polk DB6750 6.75" (holes match stock Saab spacing) Polk Audio db6750 6-3/4" component speaker system at Crutchfield but they have the dome tweeters built in, more like these: https://www.crutchfield.com/S-iaI67XWERQq/p_107DB651/Polk-Audio-db651.html
- Dash: the dome tweeters from the above DB5250 package creatively mounted via stock Saab speaker frames.
- Amp: 4-channel x 110 Infinity 7450/7451 Infinity Reference 7540a 111W x 4 car amplifier at Crutchfield (Amp panel view: Infinity Reference 7540a 111W x 4 car amplifier at Crutchfield )
- No Polk supplied crossovers in evidence.
- Rears were set up with soldered on 27 uF crossover capacitors that I think feed the built in domes (need to test). Might just be filters(?). but the dome wires didn't appear to be cut free.
- The door speakers were wired direct, no crossovers/filters evident.
- I think he had the rears feeding the dash speakers but have to go back and study that. He was using non-stock feeds at the dash.
- Amp had RCA input feeds, so there must be some LOC's in the lines somewhere. Have to look.
I definitely don't need all this power. I don't plan to run a sub. I don't listen to hip-hip, rap, etc so bass is not my thing. But, you really can't listen to the stock system very well on the road in a 'vert with the top down... volume has to be way up and the sound quality suffers. I'm guessing that running a large amp at low watts into good speakers would get me much better quality.
Questions:
- Power: The amp pulls up to 54A fused 30A X 2. So, I'd need to run directly off the battery. Is this a serious load on the alternator or battery? As in battery or charging system damaging? I'd guess only be using something like 15 -20 watts a channel at most I'm guessing. So I don't expect to be pulling a lot of current. Advise me.
- Hookup: I'd like to run with a similar to stock configuration where the dash is high freq (no choice, domes), the doors are bass (and maybe some mid?), and the rears are either bass (stock limit?) or full range. I'd like to be able to use the fader per stock. Is it doable? The amp has some switchable and adjustable HP/LP/Flat filtering, but I'm guessing that my issue is more of trying to find full range feed for the rear, not filtering it out. Has anyone modded the stock radio to remove the filtering and get full signal to the rears?
Lastly... is it practical to tap into the stock wiring? I don't mean the physical part, but can I use the DIN feed to the AS3 amp and run that to the front (door) channel? Or should I pull the output from the AS3 amp and send that back since that's the signal level I will get from the rears coming out of the stock radio? Maybe feed pre-AS3 front input (unfiltered) with the amp level input set high and the rear with the input level set low? But, what happens with the dash domes then? Give me some direction.
Thanks,