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Class D Switching Power Amplifiers and Power D/A conversion

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Old 10th March 2006, 04:42 AM   #1
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Default car audio system needs help

hi. my car audio system needs help( a cheap way preferably, i am a college student). currently i have :
Sub- audiobahn immortal 15 4000w/2250w rms
amp- audiobahn A2300hc 2x300@4ohm-2x600@2-1200x2@1ohm
components- audiobahn 5.25 w/tweets and crossovers 120w rms
Audiobahn 3way 6x9's 200 w rms
Jvc head unit
audiobahn 3 channel crossover
1 farad capacitor
ok here is my problem. i used to have an audiobahn A1300hc amp. it made my sub pound. my fiance could here me about 6-8 blocks away. the speaker was in a downfiring box( the box was originally for a 18 in pa system.) the box was sealed and not built to the speaker's specs but sounded great. then i had a ported 3.5 cu ft box built to specs for the speaker. it sounded great until the speaker died from underpowering it(1200rms was not enough) so then i had the 05 model immortal sent to me from audiobahn and bought the new amp which was twice the power. now my system is embarrassing. the new amp is really dissappointing and it is not cool that i spent 400+ dollars on it. recently i was out-hit by 2 bazooka reverb 10s in bass tubes pushed by a punch 250. any suggestions? i would just put the 1300 back on it but my friend fried it(one of the windows came off and a piece of metal laid across the power supply in it) is it possible to fix my old amp or is there a way to build an amp with all the parts i have from the two amps? sorry this is so long and thanks for reading this post. any help would be appreciated
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Old 10th March 2006, 05:12 AM   #2
Pano is offline Pano  United States
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The 1300 is a class-D amp, so someone here might able to help you.

Did you also post this in the car sound forum? You want to know if you can fix your amp, there might be more people over there who know the amp.

BTW, if you can be heard 6-8 blocks away - pleeeese stay out of my neighborhood. Kids these days.... what you gonna do?
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Old 10th March 2006, 06:38 AM   #3
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Quote:
until the speaker died from underpowering
I am sceptical....does this mean if a song has a quiet intro or you turn your system off the speaker dies?

Its sounds like the marketing guys have you.
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Old 10th March 2006, 11:17 AM   #4
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Quote:
Originally posted by Gorilla


I am sceptical....does this mean if a song has a quiet intro or you turn your system off the speaker dies?

Its sounds like the marketing guys have you.
Nah, see, it's what happens when you crank it up way too high thinking the speaker can handle it, and drive the amp well into clipping, because it's underpowered, then both your speakers and your ears say to hell with this and give out.
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Old 10th March 2006, 12:33 PM   #5
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means that by playing it for extended periods of time while underpowering it is worse than overpowering due to the distortion that you will get from lack of power.
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Old 10th March 2006, 03:27 PM   #6
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When music is played at high level, ears pogressively lose its sensitivity. In fact one would start to become more deaf, and if exposed for prolonged period, one may need a pair of Miracle Ear pretty soon.
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Old 10th March 2006, 06:01 PM   #7
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underpowered=overdriven, guess which term the salesmen use?

From your post your real issue isn't with amplifiers.

Your original setup could not have sounded very great either if you were overdriving it like that consistantly.

You need to realize there's much more to audio than highest SPL.
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Old 10th March 2006, 10:56 PM   #8
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Quote:
Originally posted by classd4sure
You need to realize there's much more to audio than highest SPL.
Yes, well, I was going to say that - but. High SPL is his thing, it's away of showing off and proving who's the biggest bad *** on the block. Not my thing, but hey... A guy has got to show off somehow.

One need only read a few of the threads on this forum to see a lot of the "My Class-D is better than your Class-D" chest thumping. We're just more subtle about it because we're old.

Stephan really just wants to know how to, or if he can, fix his amp. He may take a few knocks on the head for his thumping loud ways, but maybe we can lead him to some really GOOD car auto, not just loud audio.

Anyone know if his amp is fixable? He probably can't do it himself, if he's never worked on amps before. Have you Stephan?
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Old 11th March 2006, 12:25 AM   #9
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Can't really say if it's fixable. It might be a lump of coal or perhaps just a blown fuse? Start by taking it apart I guess.

Panomaniac, I realized I'd gotten old and cranky as I wrote the previous post..
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Old 11th March 2006, 02:31 AM   #10
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Originally posted by classd4sure
Panomaniac, I realized I'd gotten old and cranky as I wrote the previous post..
I'm right there with you, buddy!
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