Adam Audio-A77X Starting with the X-ART tweeter, its actual diaphragm area (if unfolded) is four square inches (the equivalent of a 56mm dome tweeter in area) with a velocity ratio of 4:1. Crossover is at 3kHz and the tweeter reaches up to 50 kHz. The A77X’s 7-inch woofers appear to share all the characteristics of the premium SX-Series, a “double sandwich” of fiberglass/carbon fiber/Rohacell and high excursion. One of its woofers handles only 400 cycles and below, while the other reproduces lows as well as mid content up to 3 kHz, where the ribbon takes over — a “2.5 way” design, perhaps? Each woofer is powered by its own 100W PWM-type amp, whereas the tweeter has its own 50W A/B-type amp. The rear panel houses both XLR and RCA inputs, a low- and high-frequency shelving EQ control (at 300 and 5kHz, respectively, + or -6 dB) and a tweeter level control (+ or -4 dB).
Features
- Optimized for Center or Left Orientation
- Dual 7″ Horizontally Mounted Drivers
- Single Extended Frequency Tweeter
- Tri-Amplified Design Totaling 250W RMS
Specifications
Subwoofer | Number: 1:1 Basket: 7″ (175 mm) / 7″ (175 mm) Voice Coil: 1.5″ (38 mm) / 1.5″ (38 mm) Cone Material: Carbon, Rohacell, Glass / Carbon, Rohacell, Glass |
Tweeter | Type: X-ART x 1 Diaphragm Area: 4″² (2420 mm²) Equivalent Diaphragm: 2″ (56 mm) Velocity Transform Ratio: 4:1 Diaphragm Weight: 0.006 oz (0.17 g) |
Amplifiers | Subwoofer: PWM x 2 Amp Power RMS: 100 W Amp Power Peak: 150 WTweeter: A/B x 1 Amp Power RMS: 50 W Amp Power Peak: 75 W |
Control Panel | Input Sensitivity: -∞ to +14 dB High Shelf EQ > 5 kHz: ±6 dB Low Shelf EQ < 300 Hz: ±6 dB Tweeter Gain: ±4 dB |
Connections | Rear XLR / RCA (analog) |
Frequency Response | 38 Hz – 50 kHz |
THD | ≤0.5% (90 dB/1 m > 100 Hz) |
Output | ≥114 dB (long term output) |
SPL | ≥122 dB |
Crossover Frequencies | 400 / 3000 Hz |
Input Impedance | 30 kOhms |
Magnetically Shielded | No |
Dimensions (HxWxD) | 9.5 x 21 x 11″ (236 x 530 x 280 mm) |
Weight | 28.2 lb (12.8 kg) |