Incorporating two 7-inch woofers, a midrange driver, and ADAM Audio’s X-ART tweeter, the A77H delivers an ultra-wide frequency range.

The addition of the midrange driver helps produce clear sound in the most sensitive range of human hearing. Rotatable HPS waveguide technology and onboard DSP allow you to tune the sound for your precise requirements.

General Data

Display: Front panel multi-color LED
Cabinet Design: Dual front ported
Cabinet Material: Vinyl wrapped MDF and painted MDF front panel
Mounting options: Threaded inserts on the bottom of the cabinet (4 x M8)
Power consumption (max, idle, sleep): 220 W, 15 W, 3.5 W
AC Input Voltage: 100 – 240 V, 50/60 Hz
Power Rating: 500 W max.
Operating Conditions: -10° C to +40° C (+14° F to +104° F); <75 % RH, non-condensing
Weight: 17.1 kg (37 lb 11 oz)
Dimensions (Height x Width x Depth): 236 mm x 531 mm x 350 mm (9 1/4″ x 20 7/8″ x 13 3/4″)
Warranty: 5 years (2 years warranty plus 3 years optional with product registration)
Delivery Contents: A77H loudspeaker, power cable, Quick Start Guide

Audio Input Connectors

Analog: XLR, RCA
Input Impedance: 9 kOhm / 3.3 kOhm
Max. Input Level: +19 dBu

Amplification

Woofer
- Amplifier Type: PWM
- Peak (10% THD, limiter deactivated): 250 W
- RMS (1% THD, limiter deactivated): 200 W
Midrange
- Amplifier Type: Class A/B
- Peak (10% THD, limiter deactivated): 70 W
- RMS (1% THD, limiter deactivated): 55 W
Tweeter
- Amplifier Type: Class A/B
- Peak (10% THD, limiter deactivated): 20 W
- RMS (1% THD, limiter deactivated): 15 W

Control Options [via Network]

Networking Connector: RJ45
Connection Type: Ethernet
Communication Protocol: OCA using standard IP data
Control Software: A Control (Windows and MacOS available)
Room Adaption Options: Backplate, Extended, Sonarworks SoundID Reference integration
Advanced Room Adaptation: 6 x PEQ, Level, Delay
Third-party Calibration Compatibility: Import from Sonarworks SoundID Reference

Acoustics

Frequency Response @ -3 dB: 37 Hz – 41 kHz
Frequency Response @ -6 dB: 34 Hz – 45 kHz
Crossover Frequencies: 400 Hz, 3.0 kHz
Max. peak SPL per speaker at 1 m (sine bursts): 106 dB SPL
Max. peak SPL per speaker at 1 m (IEC-weighted noise): 118 dB SPL
Max SPL in full space at 1 m with sine bursts (average 100 Hz to 6 kHz) @ 3% THD (RMS): 105 dB SPL
Max SPL in full space at 1 m with sine bursts (average 100 Hz to 6 kHz) @ 3% THD (Peak): 108 dB SPL
Max SPL in full space at 1 m with sine bursts (average 50 Hz to 100 Hz) @ 3% THD (RMS): 99 dB SPL
Max SPL in full space at 1 m with sine bursts (average 50 Hz to 100 Hz) @ 3% THD (Peak): 102 dB SPL
Dolby DARDT max SPL in full space: 118 dB SPL
Dolby DARDT max SPL in full space (bass managed): 120 dB SPL

Drivers

Woofer
- Basket Diameter: 2 x 7″
- Voice Coil Diameter: 1.5″ (38 mm)
- Cone Material: MLM
Midrange
- Type: Dome Cone Hybrid (DCH)
- Basket Diameter: 3.5″
- Voice Coil Diameter: 1.3″ (33 mm)
- Cone Material: MLM
Tweeter
- Type: X-ART
- Diaphragm Area: 4 inch² (2420 mm²)
- Equivalent Diaphragm Diameter: 2″ (56 mm)
- Velocity Transform Ratio: 4 to 1
- Diaphragm Weight: 0.17 g
- Waveguide: HPS (rotatable)
- Waveguide Dispersion: 120° horizontal, 70° vertical

Signal Processing

AD converter: 24-bit
Internal sample rate: 96 kHz
Delay range, resolution: 0 – 10 ms, 0.1 ms
Protection: Independent peak and thermo limiters for each driver, and amplifier thermo limiters

Control Options [via Backplate]

Input Sensitivity: 0 dBu = 100 dB SPL at 1 m @ 0 dB level setting
Level: -12 dB to +12 dB
Input Selection: Balanced, unbalanced
Voicings: Pure, UNR
Room Adaption:
- Bass: +2, 0, -2, -4 dB
- Desk: 0, -2, -4 dB
- Presence: +1, 0, -1 dB
- Treble: +1.5, 0, -1.5 dB

German Handmade Precision X-ART Tweeter with rotatable HPS waveguide
3.5" DCH Midrange Driver
2 x 7'' Woofer (Multi-Layer Mineral)
Total Peak Amp. Power: 340 W
Frequency Response @ -6 dB: 34 Hz – 45 kHz
Max. peak SPL per speaker at 1 m: 106 dB SPL

2 Year Warranty