: General ? on correct Ohm sub to get...



K_cin_az
08-12-09, 12:48 AM
Amp Specs
Hi-Fonics ZXI 8010

4 x 55 W + 1 x 200 W
@ 4 Ω

4 x 110 W + 1 x 300 W
@ 2 Ω

I have 4 ohm 6x9's and 4 ohm 5.25 componets running and want to add a sub. Two questions I have that I can't seem to figure out.


1 - Should I get a dvc 2 ohm subwoofer and wire it in series so it is running at 4 ohm's like the rest of the system, or should I get a dvc 4 ohm subwoofer and wire it in parallel to run it at 2 ohms?

2 - Or is it better to go with a non DVC sub and just hook it up direct? In that case does a 2 ohm speaker at 300w actually get more power/volume that a 4 ohm speaker at 200w.

CadillacSTS42005
08-12-09, 09:22 AM
are you going to power your sub off your speaker amp
the way you have it listed is as if its a 5 channel amp with 4 for speakers and 1 for sub
if thats the case it really doesnt matter but the lower the ohm the more power youll get (dont pass the amps ohm stability though or you will send it into protect/damage it)

K_cin_az
08-12-09, 11:31 AM
Thanks, yes it is a 5 channel amp and I am just going to use that to power the sub, don't need insane power, just enough to add some thump. So getting a DVC 4 ohm speaker and wiring it in parallel so it is running at 2 ohm's is the best way to go it sounds like?

CadillacSTS42005
08-12-09, 05:12 PM
correct

K_cin_az
08-13-09, 01:19 PM
Thanks again! General question about multi channel amps....each channel is indepent correct in terms of ohms/wattage? So say if you have 4 ohms speakers running up front on this amp I would be the 55w per channel, but if I put some 2 ohm 6x9's in the back they would be getting the 110w each?

keelerdr
12-29-09, 03:22 PM
Yes, each channel should have a dedicated amp circuit within the unit itself. (Not always the case on hometheater receivers but that's different). As far as I know (for car audio) a 5 channel amp technically has 5 discrete channels (individual little amps) within it. The only thing that may be different would be if they paired them up, so one amp inside for channels 1&2, another one for channels 3&4, and a 3rd amp inside for the 5th channel...

Not sure if you have a 4 channel or 5 but the principle is the same. The 6x9's @2 ohms will be louder (b/c of more wattage) than the 5.25's at 4ohms. I don't know of any true 2 ohm 6x9's but if you have infinity or polk's "2 ohm" speakers, they are actually 2.7 ohms I believe. Regardless, they will still play louder than the 4 ohm speakers. You can also adjust the gain on the amp to compensate. I have 4 infinity kappa 50.7i's and they sound great (1 per door). Hope this helps.

keelerdr
12-29-09, 03:42 PM
Also, as far as the sub goes...

I have a JL Audio 10W3v3 in a sealed box with a JL A1400 amp and it is more than enough thump. The sub is single voice coil (dual voice coils just give you more wiring options if you are going to be hooking up multiple subs) and 2ohms. The amp puts out 500 watts RMS into 2 ohms.