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Parasound Halo A 21+ Silver Stereo Power Amplifier - A21PLUSSIL
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Abt Model: A21PLUSSIL
UPC: 100002500052
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Your Price: $3,999.00
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Color:
Silver
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Parasound A21PLUSSIL Halo A 21+ Silver Stereo Power Amplifier
Features
- 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
California customers:
General
Type
Stereo Amplifier
Total Harmonic Distortion (THD)
< 0.1 % at full power, < 0.03 % at typical listening levels
Signal to Noise Ratio
> 115 dB, input shorted, IHF A-weighted, > 110 dB, input shorted, unweighted
Power Requirements
Standby: 1 Watt, Idle (no music playing): 160 Watts , Typical Listening levels: 300 Watts, Maximum: 1400 Watts
Frequency Response
5 Hz - 100 kHz, +0/-3 dB, 20 Hz - 20 kHz, +0/-0.25 dB
Intermodulation Distortion (IM)
< 0.04 %
Damping Factor
> 1100 at 20 Hz
Input Impedance
Unbalanced: 33 k Ohms, Balanced: 66 k Ohms, (33 k Ohms per leg)
Sensitivity (Unbalanced)
1 V
Sensitivity (Balanced)
1 V
Power Output - Stereo Mode (0.1% THD)
300 watts x 2, 8 Ohms both channels driven, 500 watts x 2, 4 Ohms both channels driven
Power Output - Bridged Mode (0.1% THD)
1000 watts x 1, 8 Ohms, Bridged 4 Ohms operation is not recommended
Power Measurement 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
Inter-Channel Crosstalk
> 80 dB at 1 kHz, > 70 dB at 20 kHz
Total Gain
29 dB
Input Sensitivity for 28.28 V Output into 8 Ohms (Unbalanced)
1 V per leg
Input Sensitivity for 28.28 V Output into 8 Ohms (Balanced)
1 V
XLR Pin Protection
1 = Ground (Shield), 2 = Positive, 3 = Negative (Return)
DC Trigger Requirements
+9 Vdc to +12 Vdc, 5 mA
Audio Trigger Requirements
2 mV - 10 mV
Approximate Weight
Unit Weight (lbs.)
71
Shipping Weight (lbs.)
88
Approximate Dimensions
Height (in)
7.75
Width (in)
17.63
Depth (in)
20
Guides
Brochure
Key Features
- High Bias Class A/AB Operation
- 60 Amperes Peak Current Per Channel
- DC Servo And Relay Protection Circuits
- Independent Power Supplies For Input Stage, Driver Stage And Output Stage
- 4 Rack Space Chassis With Rear Carry Handles
- Silver Finish
Guides
Over 87 Years Of Experience
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Parasound Halo A 21+ Silver Stereo Power Amplifier
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