ADAM Audio A77H Active Studio Monitor

With an added midrange driver for even clearer sound than its predecessor, the A77X, the ADAM Audio A77H delivers rich, detailed audio across a wide area.


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ADAM A77X Powered Studio Monitors

No longer available at zZounds
With dual 7" woofers from the A7X monitor, and ADAM's trademark ribbon tweeter in a horizontal design, the A77X studio monitors deliver a wide stereo image.

The Adam A77X is a horizontally designed monitor that combines all of the technical innovations in Adam's AX-Series. Due to its powerful, compression-free sound reproduction and excellent radiation characteristics, it is suitable both for nearfield and midfield monitoring.

The special feature of the A77X is its 2 1/2-way system. Both 7” woofers start to work together at 38 Hz. At 400 Hz, one woofer fades out as the second woofer continues to operate in the midrange up to 3 kHz. This prevents interference and possible phase cancellation in the critical midrange. Even though frequency transitions and potential distortions lie outside these areas, the human ear is particularly sensitive to midrange frequencies.

Especially noteworthy in the A77X is the extremely wide stereo foundation and brilliant stereo imaging. Treble and mids are reproduced with three-dimensional realism and the lows are, as expected from a double woofer design, massive without compromising on precision.

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-inch woofers are identical with that of the A7X. With their large voice coils read more (1.5 inch) 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.


- Responsive Dual 7-inch monitor design with 1.5-inch voice coils
- X-ART tweeter with Accelerating Ribbon Technology
- 38 Hz to 50 kHz Frequency Response
- 50-watt Class A/B tweeter Amplifier, 100 watts per 7-inch woofer
- Front mounted power switch and volume control
- Both balanced XLR and unbalanced RCA output connectors
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- Number: 1 / 1
- Basket : 7 inch (175 mm) / 7 inch (175 mm)
- Voice coil : 1.5 inch (38 mm) / 1.5 inch (38 mm)
- Cone material: Carbon / rohacell / glass / Carbon / rohacell / glass

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

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

Control panel
- Input Sensitivity: - to +14 dB
- High Shelf EQ > 5 kHz: 6 dB
- Low Shelf EQ < 300 Hz: 6 dB
- Tweeter gain: 4 d

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)
- Dimensions (HxWxD): 9.5 x 21 x 11 inches (235 x 530 x 280 mm)
- Warranty: 5 Years

For support or warranty questions, please contact the manufacturer:

Reviewers gave this product an overall rating of 5 out of 5 stars. (2 ratings)
Submitted December 30, 2018 by Bobby C in San Diego, CA

"Fantastic end-game studio monitors."

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I'm a big fan of high quality audio. I use these studio monitors primarily for music and gaming on my PC. I have them running off of my Schiit Gungnir Multibit/Mjolnir 2 and the sound is super flat, non-fatiguing and clear. The 3D imaging is unreal as well. They're super expensive but very well made and have an amazing warranty. I've owned mine for maybe 6 months now and expect them to last for many years to come. I also emailed the manufacturer regarding vertical positioning and got a super detailed response within a few hours. Highly recommended!

Musical Background:


Musical Style:

Everything except country.
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