Amps specs: Ok for a subby?

N

nathan_silly

Guest
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.
 
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
 
Probably wouldn't turn my nose up at any of them nuff said
 
Thoughts please on these three amps. Not mentioning any brands...just the specs.
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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