Tube Preamp Reviews

Sidebar 1: Specifications

Description: Fully balanced stereo tube line stage preamplifier with mono switch, separate power supply, and app-based remote control. Tube complement: Philips ECG 5687WB (4) in the analog line stage, JJ Electronic ECC83 (1) and Philips ECG 6080WC (1) in the power supply unit. Inputs: 3 pairs balanced (XLR), impedance 40k ohms; 3 pairs single-ended (RCA), impedance 40k ohms. All inputs transformer-coupled. Outputs: 2 pairs balanced (XLR), impedance 75 ohms @1kHz, 400 ohms @20Hz; 2 pair single-ended (RCA), impedance 43 ohms @1kHz, 80 ohms @20Hz. Maximum input level: 12V. Maximum peak output level: 10V. Frequency range: 10Hz–40kHz. THD+N: 0.03% at 10V RMS output. Noise: –120dBV. Gain: 6dB or 12dB balanced (0dB or 6dB unbalanced) at customer request. Channel separation: 90dB at 10kHz. Power requirement: 120V or 240V, 50–60Hz (factory-set). Power requirement: 85W.
Dimensions: Each unit 19" (480mm) W × 12" (300mm) D × 6" (155mm) H. Weight: Amplifier, 30lb (14kg); power/ control unit, 33lb (15kg).
Finish: Black/gray.
Serial number of units reviewed: 0154/0155. Manufactured in Sweden.
Price: $60,000. Approximate number of US dealers: 2. Warranty: Two years, six months on tubes.
Manufacturer: Engström & Engström AB, Sankt Petri Kyrkogata 10, SE-222 21 Lund, Sweden. Tel: +46 733 705151. Web: engstromsound.com. US distributor: Musical Artisans, 8335 N. Keeler Ave., Skokie, IL 60076. Email: rreyes@musicalartisans.com. Web: musicalartisans.com.