Can I bridge this amp?

[eQualized]

Hi, I'm looking for an amp that can power two 4 ohm subwoofers. The clue is that it has to be as cheap as possible, while capable of producing the required amount of power. I would like to have about 150W rms for each driver. I've been looking at a Blaupunkt GT-450 amp, and was wondering if I can bridge this to a 2-channel amp, giving me 160 watts rms per channel? If not, how much power can I get out of it? The specs can be found at:

http://www.bluespot.co.uk/stock/mpa500.asp

Four channel mode max power: 4 x 100W into 4 ohms

Four channel mode max power: 4 x 160W into 2 ohms

Four channel mode RMS power: 4 x 50W into 4 ohms

Four channel mode RMS power: 4 x 80W into 2 ohms

Two channel mode max power: 2 x 320W into 4 ohms

Two channel mode RMS power: 2 x 160W into 4 ohms

Click to read more...

 

[DJ FADE 10+ year member]

yeah, you could bridge it to a 2 channel and have 160 watts rms going to each sub. its probably not going to be the cleanest of power, but it would work. you could also wire the subs together parallel and buy a two channel and bridge it or a mono amp. either way..

 

[eQualized]

But if I bridge two channels into one, won't that make the resistance drop to 2 ohms? It says 2x160W into 4 ohm. I'm a bit confused.

 

[squeak9798 5,000+ posts]

Not if you hook a 4ohm sub up to it. 4ohm sub = 4ohm load

 

[req 5,000+ posts]

http://www.thezeb.com/p-Profile-CL300-2-Channel-Amplifier-103510.htm

why not get a cheaper amp that puts out about the same amount of power for less $?

that one does 150x2 @4ohms and is only $70... versus almost $200... but i dont know how much shipping to norway will cost =P

and it dosnt look like thezeb will ship overseas, but im sure you can find this amp over there cheaper than the blankput amp. have you looked at ebay?

 

[eQualized]

Actully, the Profile CL300 amp only puts out 2x75w rms @ 4 ohm, the 2x150w @ 4 ohm is peak rating. The Blaupunkt puts out 2x160w rms @ 4 ohm, and I expect it to be of higher quality. Plus, it's one of the cheapest amps I've found over here.

So if I get this correctly, bridging the amp won't make the resistance drop?

 

[squeak9798 5,000+ posts]

Nope

..............

 

[Rockman 10+ year member]

Bridging an amplifier doesn't have anything to do with making "the resitance drop" The final load the amplier drives is still the same. It simply has more voltage to drive the speaker with when you bridge it. That's how you get more power out of the amplifier..

4 ohm mono or 4 ohm stereo its still a 4 ohm load the amp is driving, but again when bridged there is more voltage being sent to the subwoofer, therefore driving it harder..

The only way to change the impeadance the amplifer drives is to change your subwoofer configuration.

 

[brandontw 10+ year member]

you cant bridge it at 2 ohms so only will work if your subs can be wired to run at 4 ohms

 

[eQualized]

Okay, thanks for all replies! I really appriciate your help =) I think I'll go with this amp then.