Parasound(파라사운드) 2채널 파워앰프 A23 +

Features

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

      SPECS

•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

*All Power measurement are at 120 VAC,
RMS continuous power, full audio band (20 Hz - 20 kHz)

•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: 17-1/4" (437 mm)
Depth: 15"-1/4" (388 mm)
Depth, with cables 17" (432 mm)
Height, with feet: 4-1/8" (105 mm)
Height, without feet: 3-1/2" (89 mm), 2U

•Net Weight
27 lb. (12.2 kg)

•Shipping Weight
34 lb. (14.4 kg)

•Power Requirement
Standby: <1 Watt
Idle (no music playing): 75 Watts
Typical Listening levels: 125 Watts
Maximum: 800 Watts
110-125 VAC 60 Hz or 220-250 VAC 50 Hz
AC mains voltage is set on rear panel