PSI Audio | A21-M (Single)

The powerful bi-amplified output stages features the unique “AOI” output stages and has a protection circuit, which can be monitored via the red LED on the front panel.

The active crossover, with integrated “CPR”, gives the A21-M unprecedented impulse behavior – with excellent stereo imaging. The crossover is also optimized for maximum phase coherence, projecting a wide horizontal and vertical ideal listening area.

The electronics are housed in a unit mechanically isolated from the speaker cabinet to avoid resonance at high sound pressure levels.

Designed to work in harmony with the full range of A series monitors the A21-M also makes ideal front speakers in a surround sound setup, or can be developed in to a more powerful system by adding the A225-M sub – thus protecting your investment.

“Of particular note though is the remarkable step response, which is presumably helped by PSI Audio’s “Compensated Phase Response (CPR) system”. This accurate time response is very rare in this type of speaker but here, PSI Audio has proven that it is possible.”  – Keith Holland from Resolution Magazine, UK

Features: 

• Very high SPL in a compact cabinet.
• Flat frequency response.
• Optimized directivity by phase coherency.
• Class G low-temperature amplifier stage.
• Compatible with industry standard mounting systems.
• Amplifier unit acoustically uncoupled from speaker cabinet.
• Protection circuits with overload indicator.
• Real balanced input.
• Designed for stereo and multichannel monitoring.
• Magnetically shielded for use close to video monitors.
• AOI Technology.
• ALG Technology.
• CPR Technology.
• PSC Technology. 

Specifications:

• Power RMS: 120 + 50W
• Program Power: 170W
• Input Impedance: Sym, 10k Ohms
• Sensitivity for 100 dB @ 1m: 0.775 V
• Signal to Noise Ratio: 96 dBA
• Continuous Max SPL@1m: 108 dB (single)
• Input Overload: 24 Vpp
• Program Max SPL@1m: 119 dB (pair)
• Response at -6dB: 38 - 23000 Hz
• Tolerances: ±2 dB (44Hz - 20kHz)
• Distortion THD: less than 1.4% (90Hz-12kHz)
• Phase tolerances: ±45° (190Hz - 20kHz)
• Dispersion (P.N. 4 - 16 kHz) at -6 dB: 90° x 90° (H x V)
• System: 2 Way(s)
• Crossover frequency: 2.4 kHz
• Woofer's dim. Ext. / Diaphragm: Ø217 mm / Ø170 mm
• Tweeter's dim. Ext. / Diaphragm: Ø100 mm / Ø25 mm
• Connectors: 1 x XLR F / 3P
• Signal input: 1=GND, 2=(+), 3=(-)
• Material: MDF
• Dimensions W x H x D mm: 250 x 400 x 300
• Gross / Net Weight: 14.8 / 13.4 kg
• Voltage: 115/230V (50-60Hz)
• Consumption Standby-Quiescent-Max: 1.2 - 5 - 150 W
• Mean / Max Humidity: less than 75% / less than 90%
• External Temperature: 5 - 40°C