Κώστας Φ.
Truth hurts. Here's a teddy bear.
- Μηνύματα
- 8.978
- Reaction score
- 895

"You should check out the Pass Labs website for a technical description of what it means to be an X-600.5 vs. an X-600, but I’ve heard both, and the X-600.5 is definitely better in all respects. Like the X-600, the X-600.5 is hugely powerful, but the .5 version incorporates technology used in Pass Labs’ XA line, which are of pure class A designs. (Listening to the X-600.5 makes me think I should listen to the XA line, though I’d likely have to bi-amp to get the power I need).
...
The Pass X-650.5 is not a pure Class A design. Strictly speaking, it is a Class A/B design. However, I understand that it runs in Class A up to 110 watts, which is very good since you get Class A operation even at high volume levels. (I don’t know if the meters are a good indicator, but the needles only moved at extremely high volumes.) High bias causes the X-600.5 mono’s to idle at about 550 watts, most of which dissipates as heat across the heatsinks, so be prepared for a warm room. (This can be a real benefit in winter!)
...
My B&W 800D speakers demand lots of power and sound best with high current amps. My room is fairly large and needs a lot of power to move all that air around. The X-650.5’s easily fit this bill. If you are building your system around speakers that need dynamic yet delicate high-power amps, you have got to have the Pass Labs X-600.5 monoblocks on your short list. This is especially true if you listen to a wide variety of music and need an amp that has the power, dynamics, delicacy and soundstage to cover all the musical bases of rock, jazz, classical, opera, synth, techno, etc. Highly recommended."
Full Review: Dagogo.com
Specifications:
Power Output: 600 watts maximum @ 1% THD, 1kHz, 8Ω
Frequency Response: -3dB @1Hz, -3dB @100kHz
Gain: 30dB
Damping Factor: 250 ref 8Ω nominal
Slew Rate: ± 50V/µS
Maximum Output Voltage: ± 110 volts
Maximum Output Current: ± 25 amps
Input Impedance: 22kΩ balanced
Output Noise: 400µV 20-20kHz (unweighted)
Balanced CMRR: -60dB @ 1kHz
DC Offset: <100mv differential
Temperature: 25°C above ambient at idle
Power Consumption: 550 watts idle, 1800 watts max.
Dimensions: 19 W x 22 D x 11.5 H (inch)
Shipping Weight: 150lbs.
Price: $20,000 per pair
