Alto Macro 830: 870W into 4 ohms, $219. Any good?

Discussion in 'Home Theater Projects' started by Rory Buszka, Jul 8, 2004.

  1. Rory Buszka

    Rory Buszka Supporting Actor

    Joined:
    Jun 5, 2002
    Messages:
    784
    Likes Received:
    0
    http://www.directproaudio.com/produc...directid=13499

    Has anyone ever seen this amplifier? It appears to offer an awful lot for very little: 870 watts bridged into 4 ohms. This would be a great option for subwoofer guys, and I don't think I've ever seen anything that can beat it for its price.
     
  2. Mitch N

    Mitch N Stunt Coordinator

    Joined:
    May 11, 2004
    Messages:
    74
    Likes Received:
    0
    well with a freq response of 20Hz to 20kHz, I think there are some limiting factors for certain forms of entertainment.

    But the price seems quite good. Buy it and tell us how it goes [​IMG]
     
  3. Jack Gilvey

    Jack Gilvey Producer

    Joined:
    Mar 13, 1999
    Messages:
    4,948
    Likes Received:
    0
  4. Darren_T

    Darren_T Second Unit

    Joined:
    Oct 1, 2001
    Messages:
    494
    Likes Received:
    0
    I think Mitch is saying that you won't get much below 20Hz depending on the accuracy of the frequency range. Home theater may suffer a bit as more and more movies have effects at or below 20Hz.
     
  5. Dan Hine

    Dan Hine Screenwriter

    Joined:
    Oct 3, 2000
    Messages:
    1,312
    Likes Received:
    0


    I don't know that I've ever seen a pro amp rated lower than 20hz. I'm sure they are out there but they will also be the ones that cost $5-6k. A 20hz-20khz rating is standard and would be perfectly fine for both HT and musical applications. It's not a brick wall, afterall.


    - Dan
     
  6. Darren_T

    Darren_T Second Unit

    Joined:
    Oct 1, 2001
    Messages:
    494
    Likes Received:
    0


    I was just interpreting what Mitch said... I have no opinion myself.
     
  7. Mitch N

    Mitch N Stunt Coordinator

    Joined:
    May 11, 2004
    Messages:
    74
    Likes Received:
    0
    I was more or less getting at 20Hz is may cut out some material. However, doing some figures in my head... If it's 20-20kHz +/- .1db then it would be something like -3db at 5Hz. Nothing really bad at all thinking about it. You can easily compensate for that.

    It's a good deal nonetheless. Most other amps I've seen are in the $300+ range.
     
  8. Jack Gilvey

    Jack Gilvey Producer

    Joined:
    Mar 13, 1999
    Messages:
    4,948
    Likes Received:
    0

    Just wondering what subwoofer design would be hampered by an amp -3dB at 5Hz. You certainly could compensate, though.
     
  9. Ryan Schnacke

    Ryan Schnacke Supporting Actor

    Joined:
    Feb 5, 2001
    Messages:
    876
    Likes Received:
    0
    This is directly from the PDF manual:
    POWER SPECIFICATIONS
    STEREO MODE (Both channels driven, 20Hz-20KHz)
    2ohms - 480
    4ohms - 300
    8ohms - 205

    Bridge Mono Mode (20Hz-20kHz)
    8ohms - 560
    4ohms - 800

    FREQUENCY RESPONSE (at 10dB below rated output power)
    25Hz-25KHz +0/-1dB
    -3dB points: 5Hz-50KHz

    I think you'll get very good response down to 5 or 10Hz. So long as you turn off the 30Hz high pass rumble filter. A very good deal for $215 and free shipping.

    The only comparable value I've heard mention of is the Nady XA-900 from musiciansfriend.

    Its $180 and the cheapest shipping option to Dallas is $13.
    POWER SPECIFICATIONS (1Hz, THD maximum 1%, both channels)
    2ohm: 400 + 400
    4ohm: 300 + 300
    8ohm: 200 + 200
    Bridged 4ohm: 675

    FREQUENCY RESPONSE (at 10dB below rated output power)
    20Hz-20KHz +/-1dB
    -3dB points: 5Hz-50KHz

    The Alto has defeatable rumble filter (30Hz) and defeatable clip protection. I don't think the Nady has either.
     
  10. Rory Buszka

    Rory Buszka Supporting Actor

    Joined:
    Jun 5, 2002
    Messages:
    784
    Likes Received:
    0
    I guess those Google ads really ARE good for something!
     

Share This Page