1800 watt class d mono amp

[joker187]

how does a mono amp work i have 2 15 polk 400/800 rms/peak and a 1800 watt max amp it is 500 watts x 1 chan. @ 4 ohms 900 watts x 1 chan. @ 2 ohm...will that be okay? also how does mono work, is it the 500 is split so 250 wat by 250 watt will 900 watt peak to both subs?

[ben62670]

A mono amp is just one channel. Your amp may have 4 speaker terminals, but both negs, and pos terminals are actually tied together. This makes it easy to hook up two speakers. How many ohms are your subs?

[joker187]

there dual 4 ohms...i have both of them hook up at 4 ohms. so the ++-- on the amp are tied together so that means the 500 watt x 1 chan is split right. so there's only 250 watt goin into both speakers then? and is the 1800 watt peak split so then the peak is 900 watt for each?

[disneyjoe7]

If you got 2 subs @ 4 ohms hooked to amp together ++-- then the amp sees 2 ohms and your feeding them the 900 watts. But you're correct whatever the amp pushes the 2 subs will split the feed equally together.

[ben62670]

Dual 4 ohm vc's each. Ok read the instruction carefully on wiring each sub for 8ohms then parallel the two subs at the amp for a 4ohm load. This will give each sub 250 watts. Even though you can get more out of wiring for 1 ohm you may like the SQ at a 4ohm load more. Try it.
Ben

[ben62670]

You may want to move this to the car audio section. Those guys know much more than I about car stuff.
Ben

[curved]

Here is the deal with that amp.....

-Mono Amp = 1 channel - only 1 positive and 1 negative terminal.

Are you speakers DVC (dual voice coil)? You better hope your amp is 1 ohm stable running 2 DVC subs because you'll be dipping down below 2 ohms for sure!!

You generally do the following:
a. Buy a mono amp and 2 single voice coil subs - amp will be running at about 2 ohms
b. Buy a 2-channel amp and 2 DVC subs - run them in stereo (will be running at about 2 ohms)

[ben62670]

Here is the deal with that amp.....

-Mono Amp = 1 channel - only 1 positive and 1 negative terminal.

Are you speakers DVC (dual voice coil)? You better hope your amp is 1 ohm stable running 2 DVC subs because you'll be dipping down below 2 ohms for sure!!

You generally do the following:
a. Buy a mono amp and 2 single voice coil subs - amp will be running at about 2 ohms
b. Buy a 2-channel amp and 2 DVC subs - run them in stereo (will be running at about 2 ohms)

Or wire them for 4 ohms;)

[curved]

Or wire them for 4 ohms;)

You can't do that with a mono amp and DVC subs. Each voice coil has it's own positive and negative connection. Running 1 4 ohm DVC sub on a mono amp will have you dipping below 4 ohms. I thought it is roughly 2.7ohms. It's been a while since my car stereo days though. ;)

[ben62670]

It actually works pretty good. Less watts per sub, but not a big difference. Most half way decent sub amps are 1 ohm stable, but I don't like less than 2 ohms. Wire the VC's in series, and hook them up to the amp.
Joker pretend that the two speaker terminals are one, because that is what they really are;)
Ben

[Jstas]

If it's gonna be crossed over below 100 Hz and the sole intent is to make noise than less than 2 ohms will be fine. Just might be a bit muddy and you will be pushing that amp hard.

So if you wanna go boom, wire for 1 ohm as long as the amp is 1 ohm stable. if you want clean sound, a 4 ohm load is the way to go.