MM2084 8" enclosure question

rodney

which type of enclosure would be better for a pair of the MM2084 8" subwoofers, the dual sealed enclosure or the dual bandpass?

also, i have a kenwood kac-7251 amp, that does 460w rms bridged, so if i bridged it and wired it in parallel the subs would be getting 230w rms each, correct? the suggested rms for them is only 200, so can they handle 230?

also, would 2 of these be better than 2 10" GNX subs?

thanks

AustinKP

Dual sealed.
Problem with your wiring is that the amp would be seeing 2 ohms, not 4. You have to wire each sub individually to each channel. You won't be able to get 460W out of that amp into two 4-ohm subs.
yes, they could handle 230. That's just barely over their rating.
The MM series is better-sounding than the gnx series. However, you'll have a lot more cone area w/ the 2 10's than the 2 8's, so the GNX's would probably be louder, but not as clear. Tradeoff is up to you.

MacLeod

Agreed with Austin.

Sealed is better and both subs would either be a 2 ohm mono or 8 ohm mono load. Not 4.

Thom

But if the subs haven't been purchased yet you can get two MM2084DVC's and wire them as a 4 ohm final impedance.

Systems

Originally posted by Thom
But if the subs haven't been purchased yet you can get two MM2084DVC's and wire them as a 4 ohm final impedance.

how do i do that??

MacLeod

Wire them in series.

2 single voice coil subs wired in series would present an 8 ohm load and 2 dual voice coil subs wired in series would present a 4 ohm load.

Systems

so i would bridge my kenwood amp to get 460w x1, then wire the DVC subs in series, and they would be getting 230w rms a piece? thanks

Thom

Each sub has two 4 ohm voice coils, so each sub would be wired in series (for 8 ohm impedance), then parallel them together (for a final 4 ohm impedance).

If your amp is 2 ohm stable (bridged), you'd be better off with single voice coil woofers, for a 2 ohm load.. You didn't mention it, and I don't know anything about that amp.

Systems

here's the specs for my amp:

» 150 watts RMS x 2 at 4 ohms
» 230 watts RMS x 2 at 2 ohms
» 460 watts RMS x 1 bridged output at 4 ohms
» stereo or bridged mono output
» 4-ohm stable in bridged mode
» Tri-way capable (Tri-Way Crossover required)
» MOSFET power supply
» requires 4-gauge power and ground leads — wiring and hardware not included with amplifier
» variable low-pass crossover (50-200 Hz at 18 dB per octave)
» selectable high-pass crossover (150 Hz at 12 dB per octave)
» selectable bass boost (0/+6/+9/+12 dB at 90 Hz)
» wired remote control (with 20-foot cable) controls bass boost
» preamp- and speaker-level inputs
» preamp outputs
» cooling fan

neomagus00

for 2 subs going to 4 ohms, you want DVC. wire the coils in series on each sub, then the subs in parallel, like Thom said.

rodney

So the final wiring would look something like the diagram below, right? I'd bridge the amp to get 460x1 rms at 4 ohms, then wire the speaker coils in series and then the speakers in parallel so that each DVC sub is getting 230w rms at 4 ohm, correct?

neomagus00

looks good to me, yep