Pradžia - Namų garsas - Įranga namų garsui - Galios stiprintuvai - A21+ stereo stiprintuvas
A21+ stereo stiprintuvas
Changes from the original A 21→A 21+
- 250 → 300 Watts (8Ω)
- 400 → 500 Watts (4Ω)
- 750 → 1000 Watts (bridged)
- Filter cap: 88,000 uF → 108,000 uF
- S/N: 112dB → 115 dB
- THD (at full power): 0.2% → 0.1%
- Crosstalk (20kHz): 63dB → 70dB
- Transformer size: 1.2 kVA → 1.3 kVA
- Weight: 60 LB → 71 LB
- Refined Halo cosmetic with aluminum end caps & gold highlights
- Updated rear panel with heavy duty speaker terminals from JC 5
- Upgraded internal gold on gold audio connections
- Updated auto turn on circuit
All 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
- Available in silver or black
Techninė specifikacija:
300 watts x 2, 8 Ω both channels driven; 500 watts x 2, 4 Ω both channels driven
1000 watts x 1, 8 Ω; Bridged 4 Ω operation is not recommended
60 amps peak, per channel
> 130 volts per microsecond
5 Hz – 100 kHz, +0/-3 dB; 20 Hz – 20 kHz, +0/-0.25 dB
< 0.1 % at full power; < 0.03 % at typical listening levels
< 0.04 %
Unmeasurable
> 80 dB at 1 kHz; > 70 dB at 20 kHz
Unbalanced: 33 kΩ; Balanced: 66 kΩ,(33 kΩ per leg)
29 dB
Unbalanced: 1 V; Balanced: 1 V per leg
> 115 dB, input shorted, IHF A-weighted; > 110 dB, input shorted, unweighted
> 1100 at 20 Hz
+9 Vdc to +12 Vdc, 5 mA
2 mV – 10 mV
1 = Ground (Shield); 2 = Positive; 3 = Negative (Return)
Width: 448 mm; Height without feet: 181 mm; Height with feet: 197 mm; Depth: 508 mm; Depth with cables: 546 mm
32.2 kg
39.9 kg
Standby: 1 Watt; Idle (no music playing): 160 Watts; Typical Listening levels: 300 Watts; Typical Listening levels: 300 Watts
