Theta Digital Citadel monoblock amplifier Specifications

Sidebar 1: Specifications

Description: Balanced, differential, solid-state monoblock amplifier. Audio inputs: one single-ended (RCA), one balanced (XLR). Polarity: noninverting, both inputs. Digital input: To Be Announced. Optional control I/O: RS-232, DB9, RJ-45 connectors. Output power: 400W into 8 ohms (26dBW), 425W typical; 600W into 6 ohms, 650W typical. Frequency response: 0.2Hz-400kHz, -3dB, at full power. THD+noise: <2%. S/N Ratio: >103dB. Input impedance: 60k ohms. Input sensitivity: 3.1V RMS (single-ended), 1.55V RMS (balanced), both for 400W into 8 ohms. Voltage gain: 25dB (single-ended), 31dB (balanced). Power consumption: 80W at Standby, 120W at idle, 800W at full power into 8 ohms, 1350W into 4 ohms, 2100W into 2 ohms.
Dimensions: 19 5/8" H by 8 13/16" W by 23 5/8" D. Weight: 110 lbs.
Finishes: silver, black.
Serial numbers of units reviewed: 024907, 024908.
Price: $15,800/pair (second set of output terminals for biwiring adds $300 per amplifier; communications I/O also adds $300 per amplifier). Approximate number of dealers: 85.
Manufacturer: Theta Digital, 5330 Derry Ave., Suite R, Agoura Hills, CA 91301. Tel: (818) 597-9195. Fax: (818) 597-1079. Web:

Theta Digital
5330 Derry Ave., Suite R
Agoura Hills, CA 91301
(818) 597-9195