More volume from 1 sub @ 300W or 2 @ 150W each?

[drpeeb 10+ year member]

The Alpine PDX-5's sub channel puts out 300W RMS @ either 2ohms or 4. (Weird that the power doesn't change even when the impedance does)

I'm considering one, but possibly two Alpine 10" subs (have both 2 & 4ohm DVC models) in sealed enclosures.

Would I get more, less, or the same volume from:

- One Alpine SWS-1043D (4ohm DVC) sub which would be powered by 300W RMS at
2
ohms.
 
- Two Alpine SWS-1043D (4ohm DVC) subs which would be powered by 150W RMS at
4
ohms.
And, what would the SQ affect be between the two choices?

Apparently the PDX-5 has some tricky circuitry to maintain the 300W RMS power at either 2ohms or 4 ... Not sure how they do that.

(Reason: Not positive I want to try to jam in two sub boxes)

Tks as always dudes ... Hope I'm getting smarter ... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Click to read more...

 

[drpeeb 10+ year member]

No opinions??

 

[SavageBlackout 10+ year member]

its impossible to get a 4 ohm load on a dvc 4 sub

 

[nickolas_j_t 10+ year member]

wire it correctly to one amp? I think you can.

 

[GAM3OVR 5,000+ posts]

No replacement for displacement

Cone area > power.

 

[drpeeb 10+ year member]

its impossible to get a 4 ohm load on a dvc 4 sub

I agree.

I meant two dvc 4 subs powered by the amp's one channel @ 4ohms.

Did I phrase it wrong in the question? Noob here ...

 

[SavageBlackout 10+ year member]

I agree.
I meant two dvc 4 subs powered by the amp's one channel @ 4ohms.

Did I phrase it wrong in the question? Noob here ...

its cool. theoretically it would be the same, but considering more power to 1 sub = more heat, more heat = more distortion, and that 1 sub would move more, meaning less coil in the gap, so 2 would probably sound better, but the difference is minimal

 

[drpeeb 10+ year member]

I agree.
I meant two dvc 4 subs powered by the amp's one channel @ 4ohms.

Did I phrase it wrong in the question? Noob here ...

Here's the wiring for the two scenarios:

1)

2)

 

[drpeeb 10+ year member]

its cool. theoretically it would be the same, but considering more power to 1 sub = more heat, more heat = more distortion, and that 1 sub would move more, meaning less coil in the gap, so 2 would probably sound better, but the difference is minimal

OK, I think I understand. Appreciate it ...

 

[drpeeb 10+ year member]

its cool. theoretically it would be the same, but considering more power to 1 sub = more heat, more heat = more distortion, and that 1 sub would move more, meaning less coil in the gap, so 2 would probably sound better, but the difference is minimal

Ahh ... One more thing. Do you believe the Alpine really does put out its 300W RMS equally perfect-o at both the rated 2 and 4 ohms? Or, do you think it could actually be a little better at the "easier" 2ohm rating? (or maybe the 4ohm for some reason I don't know yet?) ... or does it even matter?

 

[cobra65427289 10+ year member]

No replacement for displacement
Cone area > power.

No.

 

[drpeeb 10+ year member]

No.

No? No you disagree? No there's no difference ... ? Please tell it!

 

[SRim23 5,000+ posts]

The Alpine PDX-5's sub channel puts out 300W RMS @ either 2ohms or 4. (Weird that the power doesn't change even when the impedance does)
I'm considering one, but possibly two Alpine 10" subs (have both 2 & 4ohm DVC models) in sealed enclosures.

Would I get more, less, or the same volume from:

- One Alpine SWS-1043D (4ohm DVC) sub which would be powered by 300W RMS at
2
ohms.
 
- Two Alpine SWS-1043D (4ohm DVC) subs which would be powered by 150W RMS at
4
ohms.
And, what would the SQ affect be between the two choices?

Apparently the PDX-5 has some tricky circuitry to maintain the 300W RMS power at either 2ohms or 4 ... Not sure how they do that.

(Reason: Not positive I want to try to jam in two sub boxes)

Tks as always dudes ... Hope I'm getting smarter ... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

its not black magic or anything. alpine, jbl, jl, and a few others have amps that do the same power at any ohm. actually the jbl bpx1100.1 did more power at 4 ohm than 1.

 

[SavageBlackout 10+ year member]

Ahh ... One more thing. Do you believe the Alpine really does put out its 300W RMS equally perfect-o at both the rated 2 and 4 ohms? Or, do you think it could actually be a little better at the "easier" 2ohm rating? (or maybe the 4ohm for some reason I don't know yet?) ... or does it even matter?

its voltage may be regulated to keep the power the same at different ohm loads, but i would guess that it is more efficient at 4. if there is a difference it would be so small i bet you couldn't hear it

 

[cobra65427289 10+ year member]

No, meaning I disagree. I've done higher numbers on my own setup with half the power, and half the cone area.

90% of a decent setup is in the install.