Adam A77X (B)

Like all models of the AX series, the A77X features the ADAM proprietary X-ART tweeter. The ´X’ stands for ´eXtended frequency response’ and thus for one of the features of the Accelerating Ribbon Technology that has been drastically improved: the frequency response. It now extends all the way up to 50kHz. In addition, the X-ART tweeter has higher efficiency and higher maximum sound pressure levels.

The two 7´´ woofers are identical with that of the A7X. With their large voice coils (1.5´´) and powerful amplifiers, they are capable of both very high maximum sound pressure levels as well as very deep registers. The woofers do not cover the same frequency bands: while both of them are responsible for the (sub-) bass frequencies up to about 400Hz, only one of them reproduces the midrange. This prevents interferences between the two drivers.

Amplifiers / controls

Each driver has its own dedicated amplifier. A 50W A/B amp is responsible for the X-ART tweeter, while the bass-/midwoofers are driven by a 100W PWM amp each. The front panel includes a power switch and a control for the volume that retains the volume setting independently from the on/off switch.

The rear panel features several additional controls: a gain for the high frequencies (+- 4dB) and two shelf filters for high and low frequencies.
To ensure greater compatibility, there are both XLR (balanced) and RCA (unbalanced) connectors.

WORLD PREMIERE at the Prolight+Sound 2011

The A77X will be showcased for the very first time at the Prolight+Sound 2011 (Frankfurt am Main/Germany). We are looking forward to seeing you at booth C51 in Hall 6.1!

Subwoofer
Number 1 / 1
Basket Ø 7″ (175 mm) / 7″ (175 mm)
Voice coil Ø 1.5″ (38 mm) / 1.5″ (38 mm)
Cone material Carbon / rohacell / glass / Carbon / rohacell / glass

Tweeter
Number 1
Type X-ART
Diaphragm area 4 inch (2420 mm)
Equiv. Diaphragm Ø 2″ (56 mm)
Velocity transform ratio 4:1
Diaphragm weight 0.17 g

Built-in Amplifiers
Subwoofer 1
Type PWM
Amp. power RMS / music 100 W / 150 W
Subwoofer 1
Type PWM
Amp. power RMS / music 100 W / 150 W
Tweeter 1
Type A/B
Amp. power RMS / music 50 W / 75 W

Control panel
Input Sensitivity -? to +14 dB
High Shelf EQ > 5 kHz +-6 dB
Low Shelf EQ Tweeter gain +-4 dB

Input connectors
Analog XLR / RCA
Location Rear

General data
Panel Front
Frequency response 38 Hz – 50 kHz
THD 90dB/1m > 100 Hz ?0.5 %
Long term output ?114 dB
Max. peak ?122 dB
Crossover frequencies 400 / 3000 Hz
Input impedance 30 KOhm
Weight 28.2 lb (12,8 kg)
Magnetically shielded Optional
Height x Width x Depth 9.5″ (235 mm) x 21″ (530 mm) x 11″ (280 mm)
Warranty 5 Years