ATI vs CINEPRO, shall we?
Home Theater Magazine Review of Earthquake/ATI Seven-Channel Amplifier:
http://hometheatermag.com/poweramplifiers/905earthquake/index2.html
All channels driven continuously into 8-ohm loads, 1% distortion =
329.6 watts (per company Spec: 8-ohms = 300 watts).
2 channels driving 8-ohm loads, 1% distortion = 374.4 watts.
Into 4 ohms, 1% distortion = 564.7 watts.
THD+N =
0.013% (XLR).
Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –101.90 dB left-to-right and
–101.14 dB right-to-left using the XLR inputs.
The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 Hz to 24 kHz with "A" weighting was –102.60 dB using the XLR input.
Home Theater Magazine Review of Cinepro 3k6SE3 Gold Six-Channel Amplifier:
http://hometheatermag.com/poweramplifiers/91/index2.html
All channels driving 8-ohm loads, 1% distortion =
348.5 watts (per company Specs: 8-ohm = 425 wpc).
2 channels driving 8-ohm loads, 1% distortion = 414.5 watts.
Into 4 ohms, 1% distortion = 693.7 watts.
THD+N =
0.13%.
Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was
-59.78 dB left to
right and -60.56 dB right to left.
The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 Hz to 24 kHz with "A" weighting was -98.55 dB.
What concerns me about the Cinepro:
1) Cinepro listed their amp as 425 watts @ 8 ohms, but with all channels driven, it’s only 349 watts! In contrast, ATI listed their amp as only 300 watts, but it measured 330 watts!
2) Distortion on the Cinpro is ten times that of ATI!
3) But the most troublesome fact is that the CROSSTALK of the Cinepro is –59.78dB @ 1 kHz!!! That means that at 20 kHz, it is most likely -34dB!!!
[-59.8 dB] + [log2(20) * 6dB per Octave] = -59.8 + 26.1 = -33.7dB @ 20 kHz.
