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10-21-2009, 03:32 PM

#31

army4ever

50 Watt CAFz'r

Join Date: Dec 2007

Posts: 81

Quote:

Originally Posted by ndinadis

The two channels bridged on an amp that makes 75x4@4 will be more then enough to drive a simple 10"

so what happens to the other 2 channels if its bridged its only going to be able to power 2 channels so now u have to power the front speakers off something

10-21-2009, 04:01 PM

#32

MR2NR

4000 Watt CAFz'r

iTrader: (66)

Join Date: Dec 2003

Posts: 6,420

2 channels power the front speakers, 2 channels bridged runs the sub. In essence the 4 channel amp is now a 3 channel amp. Power wise lets say a 75w rms x 4 amp would then be 75w x 2 + 300w x 1.

10-21-2009, 06:16 PM

#33

Denonite

500 Watt CAFz'r

iTrader: (1)

Join Date: Dec 2008

Posts: 968

Quote:

Originally Posted by MR2NR

A sub does not need lots of power, in the days before readily available huge power that you accept as the norm now, we had much smaller 2 channel amps that did just fine. It is all about the box, the choice of sub to the box and then add power as the budget alllows.

If a sub "needs" lots of power, why is it that manufacturers for years built subs that only handled 100w rms of power (pick on say Rockford Fosgate here). There is no defacto standard that says you must have lots of power. It is all about the careful match of customer application - vehicle - box - sub - amp.

i agree, back in the mid/late 80's, my blue thunders ran nicely off a punch 150 for the pair, and still shook the car. Maybe those subs were a little more efficient back than, but i'm more inclined to think that we're all just a little greedy these days.