alpine mrv f545 or eclipse xa4000?

Alright some may disapprove of my setup up, but here it us just so you know what I'm working with. Polk Momo 6.5" components speakers in the front Polk DB 4" speakers in the rear Scion Headunit The Scion unit sounds okay to me, but I just need it to be louder for when I have the windows down on the highway. I want a powerful enough amp to run my Momo's, I'll most likely need to turn down the gain on the rear speakers. I'll be using LOC's to have RCA's running to the amp. I just need help deciding on which of the two amps to go with: Alpine MRV-F545 (specs from Alpine's online owner's manual PDF) Power Output: RMS Continuous Power (at 14.4V, 20 Hz to 20 kHz) Per channel into 4 ohms (0.3% THD) ...MRV-F545: 125Wx4 Per channel into 2 ohms (1% THD) ......MRV-F545: 250Wx4 Bridged into 4 ohms (0.3% THD) ........ MRV-F545: 125Wx2 +500Wx1 Frequency Response ................... 10 Hz to 50 kHz (+0, –1 dB) Signal-to-Noise Ratio (referenced to rated power) .......................................... 93 dBA (CEA-2006) .................................................................. 73 dBA Input Sensitivity (for rated power output) ............................................................. 200mV to 4.0V Input Impedance ....................................... Line in: 10k ohms< Speaker Impedance ............................... 4 or 2 ohms (Stereo), 4 ohms (Bridged) Active Dividing Network Frequency and Slope ....................................... 30 to 400 Hz, 12 dB per octave Power Requirement .................. 11 – 16V DC Negative Ground Dimensions (W x H x D) MRV-F545 ................................ 420mm x 228mm x 60mm Eclipse XA4000 (specs from eclipses website) Channel - 4/3/2 Power Output (max.) 10% THD 2ohm - 840W Power Output 1%THD 2ohm - 175Wx4 4ohm - 125Wx4 4ohm bridged - 350Wx2 THD @ Rated Power 4ohm - 0.005% Frequency Response, 1W out - 20 - 20,000Hz (stereo) Amp Crossover Hi-Pass 18dB/oct - 30 - 500Hz Lo-Pass18dB/oct - 50 - 500Hz Subsonic18dB/oct - 18Hz Pre-Amp Output Lo-Pass 18dB/oct - No Filter Dimensions (WxHxD) - 15 3/4" x 2 5/16" x 10 3/16" I may upgrade to an after market radio later, so I'd like to get the better of the two amp. Any input would be helpful. *Oh yeah, the car is a 91 Toyota MR2.

My personal vote would be the Eclipse. Those new amps are astoundingly good sounding pieces of gear. Always had Eclipse, and I've never been disappointed. The Alpine'll give you more power, obviously, but certainly not enough to notice the difference. The IcePowered amplifiers are very clean, quiet outputs, and as I said VERY good sounding pieces.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Awesome, thanks for the replies!!! I was leaning towards the Alpine, but you guys are definitely starting to change my mind. I do have two Subwoofers, behind the seats... each powered by it's own amp (only reason for running two amps, was for the ability to conceal them in my rear storage boxes) The woofers: Polk MOMO (MM2084) 8" woofer The woofer amps: MTX Audio 251D.

sedate wrote: haemphyst wrote: The Alpine'll give you more power, obviously, but certainly not enough to notice the difference. You give Alpine too much credit.  Both amplfiers are rated at 14.4v but the Eclipse has a lower THD at the same power level.  The Eclipse wins here too. Much, much better amplifier.

...what he said It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Well, I just placed my order for my amp yesterday for an XA4000. Can't wait to get it in!!!!