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post #31 of 70 (permalink) Old 06-12-2002, 04:22 PM
 
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Bandpass is just that. Essentially the box design will work as another crossover. Depending on how the box is tuned it will accentuate a certain band of frequencies and attenuate others. Bandpass boxes are typically much boomier than a ported or sealed encloser. If you are a big hip-hop or rap kind of person you may like it. Go to a local shop they should be able to demo one for you. Granted it will sound different in your car, but you can get an idea of how differently each type of box sounds...
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post #32 of 70 (permalink) Old 06-12-2002, 04:24 PM Thread Starter
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But wouldnt I get some element of bass from the speakers inside the cabin... that would make up for those lowtomid frequencies?
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post #33 of 70 (permalink) Old 06-12-2002, 04:24 PM
 
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Quote:
Originally posted by DjPiLL
I hear what you are saying.... but I guess with this setup I have a few options. 85W RMS per speaker inside should be more than sufficient.

However, if I want to really have headroom to power the speakers... i can always buy a third 700x. ;) Ill bridge both 700X amps and that would be 350WRMS per speaker if I have it cranked all the way on the amp (which I doubt I would do in that situation anyways - maybe 75% cranked).


Would I be able to keep the 4 gague wire with two 700x and a 750s?
I definitely would not want 350W RMS going into those Inifinitys. Maybe 150W-175W max RMS...
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post #34 of 70 (permalink) Old 06-12-2002, 04:25 PM Thread Starter
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Quote:
Originally posted by dbaudiopro

I definitely would not want 350W RMS going into those Inifinitys. Maybe 150W-175W max RMS...
Would turning the gain halfway on the AMP accomplish that?
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post #35 of 70 (permalink) Old 06-12-2002, 04:27 PM
 
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Quote:
Originally posted by DjPiLL
But wouldnt I get some element of bass from the speakers inside the cabin... that would make up for those lowtomid frequencies?
It depends on how the box is designed what frequencies you would attenuate or accentuate. Don't depend on your 6.5's to make up for frequencies your sub should be producing. Infinity specs them at 45Hz, however, I would bet they have a pretty steep rolloff around 80-100Hz...
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post #36 of 70 (permalink) Old 06-12-2002, 04:30 PM
 
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Quote:
Originally posted by DjPiLL


Would turning the gain halfway on the AMP accomplish that?
OK this is more like chat goin on here.

Gain should never be used as a volume or power control. All gains should be matched to the signal source output...
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post #37 of 70 (permalink) Old 06-12-2002, 04:31 PM Thread Starter
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So if i do end up with a seriously powerful amp for those kappas.... as long as I dont seriously crank the volume... they should be fine... no?
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post #38 of 70 (permalink) Old 06-12-2002, 04:38 PM
 
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In my '91 Sundance I had Blaupunkt 5.25" up front. The speakers were rated at 45W RMS, but I was pushing 75W RMS to them. I did blow one of the speakers after a while, but who knows if that really had anything to do with overpowering them.


How to set gain levels. Turn gain all the way down. Start to turn volume up until you start to hear distortion. Once hearing distortion, back the volume down a tad. Now, leave it at that volume. Go to the amp and start turning the gain level up until you start to hear distortion. Once you hear distortion, back the gain down a tad.


So yes, gain should NEVER be used as a "volume control".
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post #39 of 70 (permalink) Old 06-12-2002, 04:40 PM Thread Starter
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Quote:
Originally posted by Warlord187
So yes, gain should NEVER be used as a "volume control".
Maybe you guys misunderstood me.

What I was saying was.... if I have a super powerful amp 350W rms per channel.... and the infinities only run 90-100W RMS.

I was saying that wouldn't turning the gain on the amp halfway and LEAVING it that way help in not overpowering them? Any "volume" adjustments get done at the headunit... no doubt.
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post #40 of 70 (permalink) Old 06-12-2002, 04:41 PM
 
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Quote:
Originally posted by DjPiLL
So if i do end up with a seriously powerful amp for those kappas.... as long as I dont seriously crank the volume... they should be fine... no?
True (kinda), but if you run 350W RMS to each Kappa, in order not to blow the speakers, you will have to keep the volume pretty low. The downside is the volume controls ALL of your system. If you keep the volume down low as to not blow the mids/highs, you won't hear your subs very well.
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post #41 of 70 (permalink) Old 06-12-2002, 04:41 PM
 
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Quote:
Originally posted by DjPiLL
So if i do end up with a seriously powerful amp for those kappas.... as long as I dont seriously crank the volume... they should be fine... no?
You want to be reasonable with your power. Like I said before, I'd stick with something in the range of 150-175W. Something like the 800.4 would work nicely. Or you could do two 2-channel amps. Like Warlord said you really don't want your rears to be very dominant. They are there simply for fill or rear passengers. You want all your sound coming from up front. I consider it this way, when I go to a concert how do you sit? You sit facing the stage right? You wouldn't sit with your back to the stage, so why have your sound coming from behind you?

Also, I don't know how much you're planning on spending for those Infinitys, but you may want to do some shopping for Diamond Audio. The MSRP on the Infinity page seems a little high for those and the Diamonds will sound much better IMHO...
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post #42 of 70 (permalink) Old 06-12-2002, 04:44 PM Thread Starter
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What about power wire? Would four gague wire be sufficient to power three amps? Two 700x and one 750s? If it works for those three, if i go with two smaller 175W amps then that should definitely be fine.
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post #43 of 70 (permalink) Old 06-12-2002, 04:46 PM
 
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Quote:
Originally posted by dbaudiopro

Also, I don't know how much you're planning on spending for those Infinitys, but you may want to do some shopping for Diamond Audio. The MSRP on the Infinity page seems a little high for those and the Diamonds will sound much better IMHO...
Oh heck yes. Diamond audio makes killer speakers. MB Quart also makes sweet stuff.

Hey, if you have the change, why not go with some Focals?
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post #44 of 70 (permalink) Old 06-12-2002, 04:47 PM Thread Starter
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On ebay u can get the Kappas in the $150 range.
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post #45 of 70 (permalink) Old 06-12-2002, 04:49 PM
 
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Quote:
Originally posted by DjPiLL
What about power wire? Would four gague wire be sufficient to power three amps? Two 700x and one 750s? If it works for those three, if i go with two smaller 175W amps then that should definitely be fine.
Power guage, may as well go with 0 AWG from battery to distribution box, and than you could go with 2 AWG or maybe even 4 AWG from the distribution box to the amps.
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