A23+ stereo stiprintuvas

Parasound
1899 

Changes from the original A 23→A 23+

  • 125 → 160 Watts (8Ω)
  • 225 → 240 Watts (4Ω)
  • 400 → 500 Watts (bridged)
  • Filter cap: 40,000 uF →54,400 uF
  • Crosstalk (20kHz): 63dB → 70dB
  • Transformer size: 1.0 kVA → 1.1 kVA
  • Refined Halo cosmetic with aluminum end caps & gold highlights
  • Updated rear panel with heavy duty speaker terminals from HINT 6
  • Upgraded internal gold on gold audio connections
  • Updated auto turn on circuit

All Features

  • 160 watts x 2 @ 8 Ω RMS, both channels driven
  • 240 watts x 2 @ 4 Ω RMS, both channels driven
  • 500 watts x 1 @ 8 Ω, in bridged mode
  • Circuitry designed by legendary John Curl
  • High bias Class A/AB operation
  • 45 amperes peak current per channel
  • Stable with speaker impedance dips below 2 Ω
  • Balanced inputs with discrete circuits
  • Heavy-duty 24k gold-plated 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
  • 12 beta-matched 15 ampere, 60 MHz bipolar output transistors
  • 1.1 kVA shielded toroid transformer w/ independent windings for each channel
  • Independent power supplies for input stage, driver stage and output stage
  • 54,400 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
  • 2 rack space chassis with rear carry handles
  • Rack mount hardware available separately
  • Available in silver or black

Techninė specifikacija:

Power Output – Stereo Mode (0.06% THD)
160 watts x 2, 8 Ω both channels driven; 240 watts x 2, 4 Ω both channels driven

Power Output – Stereo Mode (0.9% THD)
210 watts x 2, 8 Ω both channels driven; 300 watts x 2, 4 Ω both channels driven

Power Output – Bridged Mode (0.06% THD)
500 watts x 1, 8 Ω; Bridged 4 Ω operation is not recommended

Power Output – Bridged Mode (0.9% THD)
600 watts x 1, 8 Ω; Bridged 4 Ω operation is not recommended

Current Capacity
45 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)
< 0.06 % at full power; < 0.03 % at typical listening levels

IM Distortion
< 0.04 %

TIM
Unmeasurable

Inter-channel Crosstalk
> 85 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 Out (8 Ω Load)
Unbalanced: 1 V; Balanced: 1 V per leg

S/N Ratio
> 112 dB, input shorted, IHF A-weighted; > 107 dB, input shorted, unweighted

Damping Factor
> 800 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
Width: 437 mm; Depth: 388 mm; Depth, with cables: 432 mm; Height, with feet: 105 mm; Height, without feet: 89 mm (2U)

Net Weight
12.2 kg

Shipping Weight
14.4 kg

Power Requirement
Standby: <1 Watt; Idle (no music playing): 75 Watts; Typical Listening levels: 125 Watts; Maximum: 800 Watts

A23+ stereo stiprintuvas

Parasound
1899