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Amps specs: Ok for a subby?

Discussion in 'AV Receivers & Amplifiers' started by nathan_silly, Sep 22, 2003.

  1. nathan_silly

    nathan_silly
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    Thoughts please on these three amps. Not mentioning any brands...just the specs. :)

    Amp number 1

    Rated Output Power, per channel (1 kHz, THD 0.1%, Both Ch
    Drive)
    Stereo / Parallel modes
    per channel (into 4 ohms) 545 W
    per channel (into 8 ohms) 340 W
    Bridged mode
    per channel (into 8 ohms) 1090 W
    Frequency Response (0 dB, +0, -.5 dB) 10 Hz - 20 kHz
    Total Harmonic Distortion
    (1/2 power @ 20 Hz - 20 kHz, Both Ch Drive into 4 ohms)
    0.04%
    Dynamic Range 103 dB
    Channel Separation (4 ohm, 125 W, 1 kHz) 80 dB
    Residual Noise (0 dB ref. = .775 VAC rms, 22 Hz - 22 kHz)
    (Att. Min.) -65 dBu
    (Att. Max.) -68 dBu
    Voltage Gain (4 ohm, 1 kHz) 35.2 dB
    DC Offset Voltage 0 ± 100 mV
    Damping Factor More than 200
    Indicators
    Clipping LED 1 kHz THD 0.1%
    Signal LED Right -20 dB ± 2 dB
    Signal LED Left -40 dB ± 2 dB

    Amp number 2

    Rated Output Power, per channel (1 kHz, THD 0.1%, Both Ch Drive)
    Stereo / Parallel modes
    per channel (into 4 ohms) 780 W
    per channel (into 8 ohms) 550 W
    Bridged mode
    per channel (into 8 ohms) 1550 W
    Frequency Response (0 dB, +0.5, -1 dB) 9 Hz - 42 kHz
    Total Harmonic Distortion
    (1/2 power @ 20 Hz - 20 kHz, Both Ch Drive into 4 ohms)
    0.021%
    Dynamic Range 101 dB
    Channel Separation (4 ohm, 250 W, 1 kHz) 82 dB
    Residual Noise (0 dB ref. = .775 VAC rms, 22 Hz - 22 kHz)
    (Att. Min.) -70 dBu
    (Att. Max.) -65 dBu
    Voltage Gain (4 ohm, 1 kHz) 37.3 dB
    DC Offset Voltage 0 ± 100 mV
    Damping Factor More than 100
    Indicators
    Clipping LED 1 kHz THD 0.1%
    Signal LED Right -20 dB ± 2 dB
    Signal LED Left -40 dB ± 2 dB


    Amp number 3
    2 ohm Stereo (per channel) 750W
    4 ohm Stereo (per channel) 550W
    8 ohm Stereo (per channel) 350W
    *1 kHz Power: refers to maximum average power in watts
    at 1 kHz with 0.1% or less TRUE THD.
    Frequency Response: ±0.25 dB from 20 Hz to
    20 kHz. The frequency response is band limited
    with an 8 Hz double-integrated 3rd-order Butterworth
    high-pass fi lter and a 30 kHz 7th-order
    Gaussian low-pass fi lter.
    Signal to Noise (A-weighted): >100 dB below
    rated power.
    Damping Factor: >3,000 from 10 to 400 Hz.
     
  2. slingshot

    slingshot
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    Is this some kind of test Nathan, to see if we can spot a good amp from a bad one on specs alone ?

    If the specs are correct then any of them should easily drive most subs, however on specs I'm going to have to plump for no.2 has a nice +-5 db from 9Hz and lower THD than 1. But hey what do I know ?

    Slingshot
     
  3. Ed Selley

    Ed Selley
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    Probably wouldn't turn my nose up at any of them nuff said
     
  4. avanzato

    avanzato
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    I know what Amp no. 3 is.

    Can I ask how you picked these amps?
     
  5. NicolasB

    NicolasB
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    If there's one thing I do know about amplifiers, it's that the specs very rarely tell you anything useful at all.
     

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