Adam A77X Active Studio Monitor
[A77X012345]

More Details:

Driver technology

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 one of them is responsible for the (sub-) bass frequencies up to about 400Hz, the other takes over most of the midrange.

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.

Features/Specifications:

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

• 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

• 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

• Input Sensitivity: -∞ to +14 dB
• High shelve > 5 kHz: ±6 dB
• Low shelve < 300 Hz: ±6 dB
• Tweeter gain: ±4 dB

• Analog: XLR / RCA
• Location: Rear

• 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
• Magnetically Shielded: Optional
• Dimensions: (H) 9.5" (235 mm) x (W) 21" (530 mm) x (D) 11" (280 mm)