Originally Posted by zeuspaul
Are you sure it's the same amp? Isn't the S3000i the sub with two 15 inch drivers and the 1700 watt ICE amp? The V1800 has the 725 watt amp.
Assuming two different amps. If the two subs are driven to the same sound level would they draw about the same amount of juice?
I am guessing I might be ok. Your previous post got me thinking. 20 amps is a lot. I have a 20 amp circuit, But the Marantz 6005 AVR and Panasonic 65 plasma TV and SVS PC13 Ultra also have a draw and I assume the AVR and subs peak at the same time. I don't know the delay in a circuit breaker and what peak load they can handle. I am fine with my current set up which includes an SVS PC13 Ultra. I am thinking of adding the V1800. I am hoping I can integrate it, I'll try the Kill a Watt on the SVS and see what it reads. I would guess the V1800 would draw a similar amount of juice if the volume is similar to the SVS.
Oh my, yes, I was mistaken!
Thank you for noticing - If we take (27*725)/1700=11.5 amps. So basically, any number I wrote, you can take 42.6% of the value and that is an approximation
as to what numbers I used above. So if I pulled 27 amps with the 1700W amp, then the 725W (PSA-rated) should be able to pull about 42.6% of the power. I like math.
Keep in mind, that was a peak value and the 20A circuit I had for it was delivering power without issues. I will say that despite being on a separate breaker, the lights in my house still were dimming SLIGHTLY from the draw.
While the logic is there, I don't think the SVS are entirely capable of pulling the same draws of power. Only ONCE was I ever able to trip a breaker with my dual SB13 Ultras (on the same circuit as my AVR, HT gear, TV, etc) on the opening of the Edge of Tomorrow and that was me just being stupid with the MV controls, which I believe I was around -10dB on the AVR. Looking at my math above, I have no doubt that if you ran the V1800 on the same circuit as your main equipment, you could certainly exceed the breaker's capacity and trip it.
These ICE amps are serious business; they enjoy power like Charlie Sheen enjoys cocaine! Not saying it's a bad thing at all, but I would strongly recommend a separate subwoofer circuit for you guys running duals or more! When they are being under powered, you will hear a sort of 'cackle' sound from the driver not getting enough juice from the amp. I first thought I had a defective unit, which is where my testing began. I never pushed it that hard again until I figured out what was going on. Lo and behold, it was just crying for some more juice.