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02Envoy
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How much amplification for 4 speakers?
How much do any of you recommend? I am looking for a good sound quality amp. Don't get me wrong, I want it loud, but it does not have to be extreme. I am looking at usamps or zapco running diamond hex components. Also, I have read subwoofer amps as being 4 times the amplification for the main speakers, is this a good rule of thumb?
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 05-08-2005 05:19 PM |
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N2Audio
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In a newer, high quality (quiet) car I would say 50w rms is all you'd need for each of your cabin speakers to sound excellent.
4:1 sounds about right for sub power.
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| 05-08-2005 05:54 PM |
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02Envoy
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Excellent, thank you! I have become very confused with the amplifier ratings from company to company. Is being 1 or 2 Ohm stable that much more important than being only 4 Ohm stable?
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| 05-08-2005 06:05 PM |
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02Envoy
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Also, regarding power for a subwoofer. There are D class amps, and then say an AB 1 channel amp. Does this really matter when powering a sub?
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| 05-08-2005 06:11 PM |
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N2Audio
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RE:
quote:
Originally posted on 05-08-2005 by 02Envoy
Excellent, thank you! I have become very confused with the amplifier ratings from company to company. Is being 1 or 2 Ohm stable that much more important than being only 4 Ohm stable?
one or two ohm stability depends on what type of amp it is and what you want to do with it.
Most regular full range class a/b amps are 2 ohms stable in stereo, and 4 ohms stable bridged, but often, because speakers commonly have a 4 ohm nominal resistance, a/b amps are operated at 4 ohms stereo.
2 ohms or 1 ohm stability (mono) eliminates most class a/b amps, this is usually a characteristic of only mono class D amps. There are some a/b amps capable, but compared to class D they are very inefficient and seem to be becoming a thing of the past.
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| 05-08-2005 10:36 PM |
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N2Audio
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RE:
quote:
Originally posted on 05-08-2005 by 02Envoy
Also, regarding power for a subwoofer. There are D class amps, and then say an AB 1 channel amp. Does this really matter when powering a sub?
The advantage to using a class D amp for subwoofers is that they're more efficient, especially if you're running a lot of power.
Class D mono, class a/b mono, and class a/b bridged 2 ch will all power a sub just fine. The key is matching the impedance and power requirements of your sub(s) up to the power output of the amp at that impedance.
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| 05-08-2005 10:44 PM |
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02Envoy
Member
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With that said. I can run my sub on 2ohm and generally get more amperage to the speaker. What is the benefit of running a sub at 4 ohms then? Noise?
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| 05-09-2005 08:52 AM |
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NiteScort
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RE: How much amplification for 4 speakers?
quote:
Originally posted on 05-08-2005 by 02Envoy
How much do any of you recommend? I am looking for a good sound quality amp. Don't get me wrong, I want it loud, but it does not have to be extreme. I am looking at usamps or zapco running diamond hex components. Also, I have read subwoofer amps as being 4 times the amplification for the main speakers, is this a good rule of thumb?
well the hex series are rated at 150rms, 300max. id think you would want to give them 100 or more to really get the most out of them. if you only feed em 50 you might as well get a cheaper set(but still good) that are closer to 50-75rms. you use an amp that only delivers 50w to a channel and then keep the gains down so as not to over stress the amp, whats the point in having killer comps that are only seeing 30w or so? like buying a Ferrari and then never going over 30mph.
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| 05-09-2005 08:55 AM |
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02Envoy
Member
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Good point on the speakers which is why I listed them. I also remember you had these installed in your car. I was hoping to buy one of those hybrid amps that do AB for the front and D for the sub, but I cannot find one powerful enough for what I think I need. I may need to just decide on 2 different amps. My concern there is finding a place to hide them and will there be a need to upgrade my battery or alternator? Nitescort, what amp model and what power to drive your hexes? Do you wish you had bought a more powerful amp?
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| 05-09-2005 09:25 AM |
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