Parasound Halo A21 Two-Channel Amplifier

Features:

Circuitry designed by legendary John Curl
THX Ultra 2 certified
High bias Class A/AB operation
Balanced inputs with discrete circuits and XLR connectors
Direct Coupled - no capacitors or inductors in signal path
Complementary MOSFET driver stage and JFET input stage
16 beta-matched 15 amp, 60 MHz bipolar output transistors
1.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel
100,000 µF power supply filter capacitance
DC Servo and relay protection circuits
AC present, channel status, high temperature indicators
Gold-plated RCA input jacks, loop output jacks
Heavy-duty 24k gold-plated 5-way speaker binding posts
Auto turn-on by 12v trigger or audio signal, 12v trigger out
Rear panel gain controls; ground lift switch
4u Chassis; carry handles; rack mounting adapter included

Specifications:

Continuous power output (20 Hz - 20 kHz): 250 watts RMS x 2 at 8 ohms, 400 watts RMS x 2 at 4 ohms, 750 watts RMS x 1 (bridged mono mode) at 8 ohms
Current capacity: 60 amperes peak per channel
Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt
Total harmonic distortion: < 0.2 % at full power
IM distortion: < 0.04 %
Slew rate: >130 V / µsecond
Dynamic headroom: > 1.5 dB
Interchannel crosstalk: > 80 dB at 1 kHz; > 63 dB at 20 kHz
Input sensitivity: 1 V for 28.28 V, THX Reference Level
Input impedance: 33 k ohm unbalanced; 66 k ohm balanced
S/N ratio: > 112 dB, input shorted, IHF A-weighted
Damping factor: > 1100 at 20 Hz
Voltage: 110V – 120V
Dimensions: 17.25" wide, 7.625" high (7" without feet), 19.12" deep
Net weight: 60 lbs.