HALO A23+ 2 CH Power Amp

Description The Halo A 23+ power amplifier combines exceptional power and performance. With two channels delivering 125 watts per channel into 8 Ω, it offers a compelling audio experience. The high bias Class A/AB operation ensures accurate and detailed sound reproduction Its stable operation into 2 Ω loads provides flexibility for various speaker configurations. The direct-coupled design, free from capacitors in the signal path, maintains signal purity and enhances transparency. With balanced XLR and unbalanced RCA inputs and A/B speaker terminals, it offers versatility and compatibility. Experience exceptional power and performance with the Halo A 23+ power amplifier.

• Two channels @ 125 watts per channel @ 8 Ω
• High bias Class A/AB operation
• Stable into 2 Ω loads
• Direct-coupled without capacitors in the signal path
• Balanced XLR and unbalanced RCA inputs
• A/B speaker terminals

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

Specifications 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

Todas las mediciones de potencia son a 120 VAC, potencia continua RMS, banda de audio completa (20 Hz - 20 kHz)Capacidad de corriente

• 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 %

• < 0.04 %

TIM Unmeasurable

• Unmeasurable

Inter-channel Crosstalk

• 85 dB a 1 kHz

• 70 dB a 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 a 20 Hz

DC Trigger Requirements

• +9 Vdc a +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 o 220-250 VAC 50 Hz
• AC mains voltage is set on rear panel