I having Sony 4 channel amp 1000 watts I want to connect it in my home how much power did it requires volt and amps

kanewolf

Splendid
Moderator
High wattage car amps, especially for woofers are hard to run in a home environment because have a 12VDC power supply with enough amps to supply the large surges of amperage required is difficult. A car battery can supply hundreds of amps instantly. Home power systems don't have that reserve power.
 

doolittle

Distinguished
It's more about how much output you want, I am using a Boss R1100M with a passive sub (4-ohm dual voice coil bridged into 8-ohm) connected to my Onkyo's LFE output. The Onkyo has about 65W/ch and I only listen to it at 50% or less, so rough safe estimate is 33W on the mains. To match sub power I estimate about 60W max output (since lows are more power demanding). double to 120W for inefficiency compensation. Old 350W PC power supply that has +12v@11A (~130w) is good enough, at max it gets quite loud where you have to yell to speak and things are shaking off the shelf from the bass.

have this setup for about 2 years now and listen to it daily, no problems.
 

kanewolf

Splendid
Moderator
High wattage car amps, especially for woofers are hard to run in a home environment because have a 12VDC power supply with enough amps to supply the large surges of amperage required is difficult. A car battery can supply hundreds of amps instantly. Home power systems don't have that reserve power.
 

doolittle

Distinguished
Well one way to "cheat" is to just drive a higher ohm load so it does not draw as much power - was one of the main reason I bridged my sub into an 8-ohm load, if you look at the R1100M specs:

1100 W MAX Power 1 Channel
825 W X 1 RMS @ 2 ohm
413 W X 1 RMS @ 4 ohm

And following ohms law, max power for an 8-ohm load is 205W. So if I wanted to drive 200W into that amp, safe to assume 50% efficiency (usual for auto amps) I would need at least 410W or +12v@34A on a single rail. Kind of how I derived my max wattage since I knew I was not going to drive it very hard so what I am using is plenty for it.
 
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