PARASOUND A21+ Stereo Power Amplifier - Black

• 300 watts x 2 @ 8 Ω RMS, both channels driven
• 500 watts x 2 @ 4 Ω RMS, both channels driven
• 1000 watts x 1 @ 8 Ω, in bridged mode
• Circuitry designed by legendary John Curl
• High bias Class A/AB operation
• 60 amperes peak current per channel
• Stable with speaker impedance dips to 1.5 Ω
• Balanced inputs with discrete circuits
• CHK Infinium, custom 5-way speaker binding posts
• Gold-plated RCA input & loop output jacks
• Direct-coupled signal path, no capacitors or inductors
• DC Servo and relay protection circuits
• AC turn-on inrush surge protection with relay bypass
• JFET input stage, MOSFET driver stage
• 16 beta-matched 15 ampere, 60 MHz bipolar output transistors
• 1.3 kVA shielded toroid transformer w/ independent windings for each channel
• Independent power supplies for input stage, driver stage and output stage
• 108,000 µF filter capacitors for output stages
• Full power is rated all the way down to 5Hz for unrestricted low-end bass
• Harris hyper-fast soft-recovery bridge diode rectifiers
• Automatic turn-on by 12 V trigger or audio sensing
• 4 rack space chassis with rear carry handles
• Rack mount hardware is included
• Available in silver or black

Power Output – Stereo Mode (0.1% THD)	300 watts x 2, 8 Ω both channels driven  500 watts x 2, 4 Ω both channels driven
Power Output – Bridged Mode (0.1% THD)	1000 watts x 1, 8 Ω Bridged 4 Ω operation is not recommended Power measurement are at 120 VAC: 0.1% THD, RMS continuous power, full audio band (20 Hz - 20 kHz)
Current Capacity	60 amps peak, per channel
Slew Rate	> 130 volts per microsecond
Frequency Response	5 Hz - 100 kHz, +0/-3 dB  20 Hz - 20 kHz, +0/-0.25 dB
Total Harmonic Distortion (THD)	< 0.1 % at full power  < 0.03 % at typical listening levels
IM Distortion	< 0.04 %
TIM	Unmeasurable
Inter-channel Crosstalk	> 80 dB at 1 kHz  > 70 dB at 20 kHz
Input Impedance	Unbalanced: 33 kΩ  Balanced: 66 kΩ,(33 kΩ per leg)
Total Gain	29 dB
Input Sensitivity for 28.28 V Output into 8 Ω	Unbalanced: 1 V  Balanced: 1 V per leg
S/N Ratio	> 115 dB, input shorted, IHF A-weighted  > 110 dB, input shorted, unweighted
Damping Factor	> 1100 at 20 Hz
DC Trigger Requirements	+9 Vdc to +12 Vdc, 5 mA
Audio Trigger Requirements	2 mV - 10 mV
XLR Pin Identification	1 = Ground (Shield)  2 = Positive  3 = Negative (Return)
Dimensions	448mm Width 197mm Height 508mm Depth (546 with cables fitted)
Net Weight	32.2kg
Shipping Weight	39.9kg
Power Requirement	1 Watt Standby 160 Watts Idle (no music playing) 300 Watts Typical Listing Levels 1400 Watts PEAK