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RE: Amplification is likely just fine...

68.154.38.15

BigguyinATL

In Reply to: RE: Amplification posted by mrr on September 21, 2010 at 16:51:52

OK, a very fine amlifier - you can't go wrong.

But I use these Crown XTI2000 @ $700 new. Nice programmable DSP front end so if you want to biamp latter you just buy another!

XTi 2000 Power:
8 ohms: 475W
4 ohms: 800W
2 ohms: 1000W*
Frequency Response: +/-0.25 dB from 20 Hz to 20 kHz at 1 watt into 4 ohms

Phase Response (at 1 watt, 20 Hz to 20 kHz): +/-15 degrees

Load Impedance: Safe with all types of loads. Rated for 2 to 8 ohms in Stereo mode, 4 to 16 ohms in Bridge-Mono mode

Sensitivity: 1.4V

Signal to Noise Ratio (below rated 1 kHz power at 8 ohms): 105 dB (A weighted)

Damping Factor: Better than 500 from 20 Hz to 500 Hz

Crosstalk: > 80 dB below rated power, 20 Hz to 1 kHz

Common Mode Rejection (CMR): > 45 dB from 20 Hz to 1 kHz

Input Stage: Input is electronically balanced and employs precision 1% resistors

Input Impedance (nominal): 20 k ohms, balanced;10 k ohms, unbalanced

Maximum Input Signal: +22 dBu typical
Three most important things in Audio reproduction: Keep the noise levels low, the power high and the room diffuse.

Follow Ups:

Since we're comparing apples to apples...here's my K2 specs.... - kootenay 12:05:40 09/22/10 (4)
That I'm using right now to drive my Martin Logan Quest speakers in my dedicated HT room.

Specifications:

500 Wpc @ 8 ohms
800 Wpc @ 4 ohms
1,250 Wpc @ 2 ohms; in all cases with both channels driven to 0.1% or less THD
Damping factor: > 3000 from 10 to 400 Hz
Signal to Noise: greater than 110 dB below full rated bandwidth power

If a thing's worth doing, it's worth doing well
(Proverb)
- Opinion? - mrr 15:11:16 09/22/10 (2)
  So, did you have an answer to my question that you'd like to share?? Here's the question:
  
  Anybody have an opinion they'd like to share? I'd love Pass, can barely afford used Bryston, and would like to spend even less than that...
  - The Hafler amp that you're looking at.... - kootenay 22:26:59 09/22/10 (1)
    is a good one, as I have the Hafler P500 which is the pro model version of the Hafler 9505 that is configured to mono to which I'm using to drive the center channel.
    
    As far as the sound is concern the Hafler is a poor man's Bryston it has all the quality that Bryston has, except, it lacks the bottom end control.
    
    If a thing's worth doing, it's worth doing well
    (Proverb)
    - RE: The Hafler amp that you're looking at.... - mrr 08:44:23 09/23/10 (0)
      Thanks for the prompt response!
- On the side note.....here's the specs of the tube amp.... - kootenay 12:12:47 09/22/10 (0)
  that I'm using to drive my Thiel 3.6 in my dedicated listening room.
  
  ARC D-250 MKII Servo: Power output 240 watts per channel minimum continous power (both channels operating) at 16 ohms from 20Hz to 20kHz with less than 1% total harmonic distortion (typically below .005% at one watt output)
  
  Power bandwidth: 250 watts per channel minimum continuous into 16, 8, 4 ohms from 20Hz to 20kHz with less than 1% THD at rated output and below .005% at 1 watt.
  Input sensitivity: .8V RMS for rated output.
  Input impedance: 80 kOhms
  Power supply energy storage: 550 joules
  Power requirements: 105-125VAC, 2000 watts (20 amps), 900 watts at "idle".
  Tube complement D-250: (6) 6922, (4) 7119/7044, (8 matched pairs) 6550, (4) 6550, (2) 12AT7
  Dimensions: 19" W (rack panel) x 10.5" H x 20.75" D (does not include rack handles, front or back)
  Weight 120 lbs. Net, 155 lbs. Shipping
  
  If a thing's worth doing, it's worth doing well
  (Proverb)

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