QUOTE(Kar Leong @ Apr 15 2010, 06:34 PM)
When ur each component wrote 125watt 4Ω, you need at least 125watt RMS [nonimal watt power from amplifier] to get better performance.
Its not both 125watt RMS, its each 6.5" speaker n tweeter.
All you need, is MRP-F550 Alpine suitable for ur comp set n your SW
500 watts, 4-Channel Amplifier
RMS Power Output:
4 ohms: 90 watts x 4 channels
2 ohms: 125 watts x 4 channels
Bridged, 4 ohms: 250 watts x 2 channels Frequency Response: 10 Hz - 50 kHz
Subsonic Filter: 15 Hz
Crossover Frequency: 50 - 400 Hz
MOSFET power supply
STAR Topology (minimizes internal noise and prevents ground interference)
Gold-plated screw terminals
Speaker and preamp-level inputs
Preamp outputs
fuse rating: 30A x 2
As your SW nominal 150watt peak i think can go until 300watt so its suitable for you to bridge it AB Class Amplifier.
Or you can use better one PDX 4.150 keke... can even add 1 more 150watt SW at your rear
4-Channel Power Density Digital Amplifier
RMS Power Rating:
4 ohms: 150 watts x 4 chan. 2 ohms: 150 watts x 4 chan.
4 ohms bridged: 300 watts x 2 chan.
Class D amplifier design
Stackable installation design with front-panel controls
Quick-connect speaker connectors
HP/LP Crossover: 30 Hz - 400 Hz, 12dB/oct.
CEA-2006 Compliant
MOSFET power supply
Stackable installation design with front-panel controls
Continuously adjustable gain control
Top mounted blue LED power/status indicator
4-Layer glass epoxy PC board
150 watts x 2 channel go for the front component left n right then 150 watts x 2 channel pump your SW 2 pcs haha nice or not ?
Just help you find another good amp ^^
Good explanation !

Thank you so much
Learn a lot things de. This will help me in looking for a suitable AMP.
And I still a beginner. Got any cheaper choice ?? heh
Found this :
MA AUDIO MA-60.4iX 4 Channel Amplifier
110w rms x 4 @ 4 Ohm
220w rms x 4 @ 2 ohm
max power : 1800w PMPO
full MOFSET power supply
PWM Circuit
4 Gauge Power / Ground Connections
Full selectable crossover : High/Flat/Low
4/2 ohm stable stereo
LPF 50-250hz
HPF 120-3khz
variables 12db bass boost at 40hz
freq response 10-30khz +/-3db
power bandwidth 18hz-22khz
S/N Ration : 98db
T.H.D 0.02%
Chorme Plated RCA Jack & Terminals.
QUOTE(ckmoy007 @ Apr 15 2010, 06:50 PM)
each side requires 125w rms @ 4ohm. so just look for a matching amp dat can give u around 100w rms @ 4ohm per channel. remember joe, bigger amps need bigger cables. thus, more expensive installtion... yea, ICE is all abt money.
at bcae1, go to the 8.ohm to learn more. know the ohm law, and match the rms watts rating accordingly. this site is very helpful if u really wan to learn more, slowly read 1 by 1. know u r lazy to read up thus asking the bonus question.

Hahaa Thanks to you too
Yea lazy to read through one by one. Thanks for the bonus
This post has been edited by joequah1: Apr 15 2010, 09:15 PM