Solid State Power Amp Reviews

Evolution 202: Solid-state preamplifier. Frequency responses: 20Hz–20kHz, ±0.02dB; 0.01Hz–1.5MHz, +0/–3dB. THD: <0.004%, 20Hz–20kHz at 4V or 4mA RMS. Signal/noise: >100dB wideband, unweighted; >109dB A-weighted (both at 4V or 4mA RMS). Input impedance: 45 ohms CAST (current mode operation), 95k ohms balanced, 47.5k ohms single-ended. Output impedance: >1M ohm CAST, 50 ohms balanced, 25 ohms single-ended. Input overload: 14mA RMS CAST, 14V RMS balanced, 7V RMS single-ended. Output overload: 16mA RMS CAST, 16V RMS balanced, 8V RMS single-ended. Gain: 12dB CAST or balanced, 6dB single-ended. Inputs: 2 pairs CAST (LEMO), 2 pairs balanced (XLR), 3 pairs single-ended (RCA), 1 tape loop (RCA). Power consumption: 45W standby, 70W power on.
Dimensions: Preamplifier: 17.25" (438mm) W by 3.8" (96mm) H by 18.25" (464mm) D. Power supply: 17.25" (433mm) W by 3.8" (96mm) H by 18.25" (464mm) D. Total weight: 46 lbs (20.8kg).
Serial Number Of Unit Reviewed: 17606050032.
Price: $15,000.

Evolution 600: Solid-state monoblock power. Inputs: 1 pair CAST (current mode operation, LEMO), 1 pair balanced (XLR), 1 pair single-ended (RCA). Outputs: 1 pair speaker binding posts. Output power: 600W RMS into 8 ohms (27.8dBW), 1200W into 4 ohms (27.8dBW). THD: <0.02% at 1kHz at 600W into 8 ohms, <0.15% at 20kHz at 600W into 8 ohms. Maximum output: 196V peak–peak, 69V RMS. Slew rate: 100V/µs. Input impedance: 70 ohms CAST, 200k ohms balanced, 100k ohms single-ended. Input sensitivity: 3.72mA CAST, 3.72 V RMS single-ended or balanced. Frequency responses: 20Hz–20kHz, +0/–0.13dB; <0.5Hz–150kHz, +0/–3dB. Signal/noise ratio: >110dB wideband, unweighted, ref. full power; >119dB A-weighted. Voltage gain: 25.4dB. Maximum Output current: 49A peak. Output impedance: >0.03 ohm, 20Hz–20kHz. Damping factor: >270, 20Hz–20kHz, ref. 8 ohms. Power consumption: 260W standby, 410W idle. Heat output: 890 BTU/hour standby, 1400 BTU/hour idle, 5500 BTU/hour maximum.
Dimensions: 17.25" (438mm) W by 9.75" (248mm) H by 22.05" (560mm) D. Weight: 135 lbs (61.1kg) each.
Serial Numbers Of Units Reviewed: 18706050019/20.
Price: $30,000/pair.

Both: Approximate number of dealers: 200. Warranty: 5 years, transferable.
Manufacturer: Krell Industries, 45 Connair Road, Orange, CT 06477-0533. Tel: (203) 799-9954. Fax: (203) 799-9796. Web: www.krellonline.com.