I need mono amp reccomendations - 800 watt RMS @ 4 ohm - diyAudio
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Old 27th August 2006, 04:01 AM   #1
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Default I need mono amp reccomendations - 800 watt RMS @ 4 ohm

Hi, I am needing to get a mono amp that will do 800 watts RMS @ 4 ohm. Any reccomendations appreciated.
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Old 27th August 2006, 07:09 AM   #2
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JBL GTO1201. Puts out 787 w rms at 4 ohms.
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Old 27th August 2006, 07:34 AM   #3
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Default Sorry - made a mistake

I need 600w @ 4 ohm amp reccomendations. Thanks
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Old 27th August 2006, 06:10 PM   #4
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Same amp. Just turn the gain down a little bit. It's always good to have some headroom.
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Old 27th August 2006, 07:23 PM   #5
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Ok, I've done a lot of planning on my project, and I found that I need 600w for a good sounding subwoofer and that anything above that will cause my driver to overexcurt.

How do you know when your amp is outputting exactly 600w?

What exactly is the gain, and what does it do?

Is it like when the gain is all the way up, it will output at the rated RMS wattage? (In this case, it would be 787 watts)???
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Old 27th August 2006, 08:12 PM   #6
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Quote:
Originally posted by rocko1290
Ok, I've done a lot of planning on my project, and I found that I need 600w for a good sounding subwoofer and that anything above that will cause my driver to overexcurt.

How do you know when your amp is outputting exactly 600w?

What exactly is the gain, and what does it do?

Is it like when the gain is all the way up, it will output at the rated RMS wattage? (In this case, it would be 787 watts)???

Nothing wrong with having more power than necessary

You could use tones and a measuring device (dmm and dummy load or dmm and clamp ammeter with the sub), but music is very dynamic and whatever measurement you make won't really matter once you start playing music.

It controls how much input voltage (from your headunit) is required to bring the amp to full output

No, often times you can get full power out of the amp with the gain all the way down, provided the signal coming from your headunit is strong enough. Normally the gain never needs to be raised above half, as the preout voltage of most modern headunits is more than strong enough to bring the amp to full output with the gain below that level. I set the gain on my amps so they begin clipping when the headunit volume reaches 31 (so 30 is the last clean setting), and that corresponds to about half gain on the sub amp, less than 1/4 gain on the midbass amp, and minimum gain on the tweeter amp (actually that one needs to be attenuated even further in the headunit to keep it from clipping prematurely, but it doesn't matter because it needs to be attenuated even more so the tweets don't overpower the mids)
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Old 27th August 2006, 09:37 PM   #7
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What does the little screen on most of the Alpine amps display?
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Old 27th August 2006, 09:48 PM   #8
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You use that to set the gain and bass boost. It also displays the battery voltage and crossover frequency, and the status of the amp in the event of a problem (overheating, short, etc).
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Old 27th August 2006, 10:04 PM   #9
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Quote:
Originally posted by sr20dem0n
You use that to set the gain and bass boost. It also displays the battery voltage and crossover frequency, and the status of the amp in the event of a problem (overheating, short, etc).
Does it display the wattage that the amp is sending to the sub(s)?
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Old 27th August 2006, 10:49 PM   #10
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I don't believe so, I saw nothing about that in the user manual that I looked through
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