In Reply to: You need to understand the measurements before you start dismissing them as irrelevant. (nt) posted by SF tech on September 18, 2007 at 13:18:08:
Problem is SF I don't just dismiss measurements. That's something that the Lunatic Fringe Objectivists take my statement to mean. i.e: I believe ALL measurements are completely useless, which I don't believe at all!
For example: I believe speaker reactance is extremely important (especially when using an SET like I do) I believe measuring the room's affect on sound is quite important, even more important than most audio specs in fact. I simply don't believe measurements such as these listed below can in anyway tell me how an amplifier will sound! At the same time not one Objectivist has been able to tell me how an amp will sound based on these measurements below either!
Continuous power output, 20Hz - 20 kHz: 400 watts RMS x 1, 8 Ω, 800 watts RMS x 1, 4 Ω, 1200 watts RMS x 1, 2 Ω
Class A power output, 20Hz - 20 kHz: 25 watts, bias set to high, 8 Ω 10 watts, bias set to low, 8 Ω
Current capacity: 135 amperes peak
Power bandwidth: 2 Hz - 120 kHz, +0/-3 dB at 1 watt
Total harmonic distortion: < 0.15 % at full power
IM distortion: balanced 16 V rms < 0.03 %
Slew rate: > 130 V/µsecond
Dynamic headroom: > 1.8 dB
Input sensitivity: 1 V for 28.28 V, THX Reference Level
Input impedance: 100 k Ω
S/N ratio: > 120 dB, IHF A-weighted, bias set to high > 122 dB, IHF A-weighted, bias set to low
Damping factor: > 1200 at 20 Hz
Power Requirement : 250 watts idle 1280 watts full power into 4 Ω
DC trigger output capacity : +12 Vdc, 150 mA
The reality is the ONLY way to know how an amp will sound is by listening to it, period! But you can look at all the scopes, measurements and specs you choose too when selecting YOUR amp.
Thetubeguy1954
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Follow Ups
- Typical Objectivist Response - thetubeguy1954 09/18/0714:12:46 09/18/07 (21)
- Hmmm . . . you give some amp specs but not the frequency response. - Pat D 18:56:57 09/19/07 (10)
- RE: Hmmm . . . you give some amp specs but not the frequency response. - thetubeguy1954 06:42:04 09/20/07 (9)
- RE: Hmmm . . . you give some amp specs but not the frequency response. - Pat D 11:49:48 09/20/07 (8)
- RE: Hmmm . . . you give some amp specs but not the frequency response. - thetubeguy1954 13:36:49 09/20/07 (7)
- You missed the point about your confusing specs and measurements. - Pat D 15:12:03 09/20/07 (6)
- Sorry You Cannot Follow This Simple Posts. I Cannot Dumb Them Down Any Further For You.... - thetubeguy1954 19:06:47 09/20/07 (5)
- Just because measurements are of no use to *you* for predicting sound quality . . . - Pat D 06:12:20 09/21/07 (4)
- RE: Just because measurements are of no use to *you* for predicting sound quality . . . - thetubeguy1954 07:45:54 09/21/07 (3)
- RE: Just because measurements are of no use to *you* for predicting sound quality . . . - Pat D 08:28:34 09/21/07 (2)
- RE: Just because measurements are of no use to *you* for predicting sound quality . . . - thetubeguy1954 13:45:18 09/21/07 (1)
- So now you change your ground . . . - Pat D 17:09:50 09/21/07 (0)
- "I don't just dismiss measurements..." You just did! - SF tech 14:38:25 09/18/07 (9)
- RE: "I don't just dismiss measurements..." You just did! - thetubeguy1954 06:21:31 09/19/07 (6)
- Sorry, you're backtracking... - SF tech 14:01:39 09/19/07 (5)
- RE: Sorry, you're backtracking... - thetubeguy1954 08:37:26 09/20/07 (4)
- You seem to have a pathological need to label people on this forum... - SF tech 11:48:21 09/20/07 (3)
- RE: You seem to have a pathological need to label people on this forum... - thetubeguy1954 14:22:12 09/20/07 (2)
- Nah, I'm done trying to talk sense to you... - SF tech 15:01:30 09/20/07 (1)
- Nah, You're Just Tired Of Being Shown To Be Wrong! - thetubeguy1954 19:11:23 09/20/07 (0)
- RE: "I don't just dismiss measurements..." You just did! - theaudiohobby 05:14:16 09/19/07 (1)
- RE: "I don't just dismiss measurements..." You just did! - thetubeguy1954 06:24:46 09/19/07 (0)