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  1. #1

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    Default Powering Momo components and coaxials

    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.
    -Joe
    1993 Nissan 240SX (rip, parting out and looking for a better one)
    polkaudio DB3065 Components
    2 Alpine SWR-1041D sealed
    PPI PC2200 running fronts
    USAmps US1000x running subs (for sale)
    Alpine CDA-9815

    PPI PCX2400 awaiting 2 polkaudio SR104-DVC

  2. #2

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    Default a few more i'm considering

    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™
    -Joe
    1993 Nissan 240SX (rip, parting out and looking for a better one)
    polkaudio DB3065 Components
    2 Alpine SWR-1041D sealed
    PPI PC2200 running fronts
    USAmps US1000x running subs (for sale)
    Alpine CDA-9815

    PPI PCX2400 awaiting 2 polkaudio SR104-DVC

  3. #3
    MacLeod
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    Default

    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.

  4. #4

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    Default

    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?
    -Joe
    1993 Nissan 240SX (rip, parting out and looking for a better one)
    polkaudio DB3065 Components
    2 Alpine SWR-1041D sealed
    PPI PC2200 running fronts
    USAmps US1000x running subs (for sale)
    Alpine CDA-9815

    PPI PCX2400 awaiting 2 polkaudio SR104-DVC

  5. #5

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    Default NAKAMICHI PA-506

    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
    -Joe
    1993 Nissan 240SX (rip, parting out and looking for a better one)
    polkaudio DB3065 Components
    2 Alpine SWR-1041D sealed
    PPI PC2200 running fronts
    USAmps US1000x running subs (for sale)
    Alpine CDA-9815

    PPI PCX2400 awaiting 2 polkaudio SR104-DVC

  6. #6

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    Default

    i'd do the large PPI as well.
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
    - Anurag

  7. #7

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    Default

    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...
    Hemi: (HEM -e) adj. Mopar in type, V8, hot tempered, native to the United States, carnivorous, eats primarily Mustangs, Camaros, and Corvettes. Also enjoys smoking a good import now and then to relax.

  8. #8

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    Default

    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.

  9. #9

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    Default How bout old DB components?

    What can my old DB components handle? Should i go with the PPI 4125 or 480?
    -Joe
    1993 Nissan 240SX (rip, parting out and looking for a better one)
    polkaudio DB3065 Components
    2 Alpine SWR-1041D sealed
    PPI PC2200 running fronts
    USAmps US1000x running subs (for sale)
    Alpine CDA-9815

    PPI PCX2400 awaiting 2 polkaudio SR104-DVC

  10. #10

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    Default

    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.

  11. #11

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    Default

    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.
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
    - Anurag

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