Powering Momo components and coaxials

Rogue Torino · November 2003

Ineed your guys opinions. I need a four chanel amp to power one set of MM6 (150rms 6.5 components) and one set of MMC690 (100rms 6x9 coax). Here's a few of the amps i'm considering:

USAmps USA-4300X

Four Channel Class AB Amplifier
Total Power Output: 360 Watts RMS
THD at Rated Power: <0.006%
Stereo Separation: >98dB
Signal/Noise Ratio: 102dBA
Frequency Response: 5Hz-50KHz
Variable 24dB Two-Way Active Crossover
Remote Bass Gain
Two Ohm Stable
75 Watts x 4 into 4 Ohms

USAmps TU-4360

Four Channel Class A Amplifier
Direct Tube Input
Oversized MOSFET Power Supply
Total Power Output: 360 Watts RMS
THD at Rated Power: <0.05%
Signal/Noise Ratio: >100dBA
Frequency Response: 15Hz-50KHz +/-0dB
75 Watts x 4 into 4 Ohms

Alpine MRV-F540

Max Power (EIAJ) 150Wx4 (4ohm; Stereo) 250Wx2 (Bridged 4ohm;)
12V RMS Continuous Power 4ohm; Stereo (0.08% THD) 50Wx4 2ohm; Stereo (0.3% THD) 70x4 Bridged 4ohm; (0.3% THD) 140x2
14.4V RMS Continuous Power 4ohm; Stereo (0.08% THD) 80Wx4 2ohm; Stereo (0.3% THD) 100x4 Bridged 4ohm; (0.3% THD) 200x2
Bass Engine®
S/N Ratio 100dBA
Frequency Response: 10-50kHz
12dB HP/LP Crossover
(15-400Hz)
Extra Large Gold Plated Terminals with Wire Insert Capability
Top Panel Power LED
4 Volt Input Capability
Continuously Adjustable Crossovers
DC Straight, STAR Topology
DC-DC/PWM MOSFET Power Supply
Per channel into 4 ohms : 80W x 4 RMS

Polk MOMO C400.4

Power
Channels 4/3/2 bridgeable
Total Dynamic Power (all ch. driven) 975 watts
14.4 Volts RMS Not Bridged @ 1kHz
4 Ohms 75 watts x 4
2 Ohms 100 watts x 4
14.4 Volts RMS Bridged
4 Ohms 200 watts x 2
Electrical
Signal-to-noise (Referenced to rated power) > 100 dBA
Remote Gain 0 to -30dB
Input Impedance > 10k Ohms
Output Impedance < 0.02 Ohms
Overall Frequency Response (-3 dB Points) < 10Hz to 45kHz
Protection circuitry Power and ground reversal, Thermal and Short, Current Overdraw and Low Impedance Protection with auto stand-by mode
Filter Settings
Subsonic Filter 24dB/Octave @ 15Hz
High Pass Filter frequency adjustable 50Hz - 5kHz
High Pass Filter slope 12db/oct. or 24dB/oct.
Low Pass Filter frequency adjustable 50Hz - 5kHz
Low Pass Filter slope 12db/oct. or 24dB/oct.

That's all the choices i have so far unless any of you have any better suggestions. I'm trying to stay under $500 New or Used but can go a little higher if need be. tell me what you think.

Rogue Torino · November 2003

PPI PCX-4125

Channel: 4
4 ohm: 125
2 ohm: 250
Bridged: 500
Damping: >500
S/N Ratio: >115dB
Dimension: 2.375" x 10"
Length: 25"
THD: 02%
Power Input: 4 Guage
Freq. Resp.: 4.5-100k
I/P Sens.: .15-12V
X/O Slope: 12dB
X/O Freq.: 30Hz-4KHz
X/O Type: 2 way
Input Type: 12 vDC
Cooling Fan: yes
QBass: QBass Plus

PPI PCX-480

Channel: 4
4 ohm: 80
2 ohm: 160
Bridged: 320
Damping: >500
S/N Ratio: >110dB
Dimension: 2.375" x 10"
Length: 18.5"
THD: 02%
Power Input: 4 Guage
Freq. Resp.: 4.5-100k
I/P Sens.: .15-12V
X/O Slope: 12dB
X/O Freq.: 30Hz-4KHz
X/O Type: 2 way
Input Type: 12 vDC
Cooling Fan: Yes
QBass: QBass

Systems · November 2003

Ya gotta go with the Precision Power amp. They are awesome. Their specs are some of the best on the market. .02% THD, 110+ SNR, 500+ damping! Hell yeah! They are extremely clean and accurate as well as being virtually bulletproof. As far as SQ goes, I would consider them to be the top of the line with Xtant a close 2nd.

My 2nd choice from your list would be the Alpine. The V12 series is also a very hi end amp and super clean. This is also a SQ amp.

Rogue Torino · November 2003

i may be able to get my hands on one of 2 McIntosh amps. I've heard that these are some of the best amps made, Are they as good as they are put out to be? MC440 6ch 100w x 2 50w x 4. or MC420 4ch 50x4 are what i have available. Would it be worth the effort to get one of these instead?

Rogue Torino · November 2003

Well here's yet one more amp i can get at a decent pice that looks quite attractive, anyone have any opinions on this one?

50 X 4 into 4 ohms + 200 X 1 into 2 ohms

50 X 6 into 4 ohms

100 X 6 into 2 ohms

200 x 3 into 2 ohms

Bridgeable bi-amp/tri-amp configuration

Built in 2 way or 3 way variable crossover

0-12 dB bass boost @ 40 Hz

Dynamic bass processor circuit

THD less than .005%

Signal to noise ratio greater than 102 dB

Channel separation more than 80 dB

Frequency response 10Hz-50kHz, -1dB

PoweredByDodge · November 2003

i'd do the large PPI as well.

MTXMAN · November 2003

I'd get two 2 ch amps and have one of them be the US Amps TU-600 for your mm6's give ya 150rms of tube power *grunts* then take your pick for the coax, the mm6's will probably be doing the vast majority of your sound reproducion...

Jstas · November 2003

The PPI is a nice amp, I'd go with that if you can get it for 500 or less. That Nakamichi isn't all it's cracked up to be. They have nice head units and CD players but amps and speakers are not all the impressive from them. As far as the McIntosh amps go, I haven't heard any of the new stuff from them. The old stuff was OK IMO. I though they sounded almost surgical. Very accurate and clear but not very musical. If you can get it though, they are very nice amps, they just didn't appeal to me.

Rogue Torino · February 2004

What can my old DB components handle? Should i go with the PPI 4125 or 480?

MacLeod · February 2004

The 480 will give you all the pwer you need and save you a couple hundred $$$. PPI is a tad underrated so that 4x80 is probably more like 4x90 or so. I doubt youll need more.

PoweredByDodge · February 2004

old db components? -- i dont see why they couldn't do 200 x 2 if they are crossed over at around 70 to 80 hertz or so.

i slam around 200 onto dx's... the db's were better... so u see my point.

however, that doesn't mean you NEED 200... you can probably get away with 80 or 90 watts as the above dude posted.

Powering Momo components and coaxials

Comments