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Item # H83189 | Customer Ratings: Ratings ( 5 Based on 1 reviews)

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ADAM Audio A7XGB Powered Monitor
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      ADAM Audio A7XGB Powered Monitor (H83189)
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      ADAM Audio A7XGB Powered Monitor (H83189)
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Limited-edition glossy black version of the popular A7XGB powered monitor.

More than 30 glowing reviews, numerous awards, and countless dedicated fans made the A7 a true legend in nearfield monitoring. The legend continues with the A7XGB, a limited-edition glossy black version where all drivers, amplifiers, and the cabinet have been revised, resulting in a speaker that claims nothing less but to be a new benchmark in nearfield monitoring.

Driver technology
The first aspect that distiguishes the old from the new model is the 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 a higher efficiency and higher maximum sound pressure levels.

The perfect integration with the lower frequencies has been achieved with a newly designed 7” midwoofer. It has been redesigned with a much bigger voice coil (1.5”) and is driven by an amplifier with twice the power compared to its predecessor. This combination produces an amazing sound and pressure levels with an almost distortion-free musical reproduction.

Amplifiers / controls
Each driver has its own dedicated amplifier. A 50W A/B amp is responsible for the X-ART tweeter, while the midwoofer is being driven by a 100W PWM (Pulse Width Modulation) amp. The front panel includes a power switch and a control for the volume that retains the volume setting independently from the on/off switch.

On the rear panel of the A7XGB are 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.

X-ART Technology
The X-ART (eXtended Accelerating Ribbon Technology) tweeters and midranges incorporate a new approach to the Air Motion Transformer concept originally developed by Dr. Oskar Heil. ADAM Audio has improved upon this splendid idea utilizing superior geometries and materials to achieve unprecedented audio fidelity. X-ART strikes a new path concerning the kinematics of moving air, resulting in a dramatic improvement in the quality of audio reproduction.

The X-ART membrane consists of a pleated diaphragm in which the folds compress or expand according to the audio signal applied to them. The result is that air is drawn in and squeezed out, like the bellows of an accordion.

The ADAM X-ART design overcomes the piston-like motion of all conventional drivers and their inevitable problems by achieving an improvement in air loading by a factor of 4 over conventional transducers. To illustrate the basic principle by a comparison: When you breathe, your thorax is moving slowly whereas the air is moving comparably fast. Similarly, the X-ART diaphragm presses the air faster in or out of its folds than they themselves are moving. This markedly superior ”motor” is responsible for the unprecedented clarity and pristine transient reproduction that can be heard with the ADAM X-ART drive units.

In addition, the X-ART tweeter’s pleated membrane avoids the typical breakup/distortion and subsequent dynamic limiting at higher frequencies of stiffer voice coil designs, such as those found in dome and cone tweeters. Another positive result of the X-ART design is that the driving ”stripes” are in direct contact with the outer air and are cooled immediately.

Pulse Width Modulation
PWM (Pulse Width Modulation) – sometimes referred to as Class D amplification, sometimes called Switching Amp Technology – converts the incoming signal to a series of rectangular waveforms of equal height. The width of the rectangles varies in time and the relation of the width of the rectangles represents the musical signal. This waveform can be amplified much more simply, as the transistors are not modulated anymore; instead they are used as switches that only turn the power supply voltage on and off.

It is possible that a very fast mechanical switch could do the job, but power transistors are a better choice for the task, so PWM amplifiers still work pretty much like conventional Class AB designs. It is important to note there are no bits and bytes involved, so “Digital Amplifier” is a misleading and inaccurate term.

The main advantage of PWM amplifiers is their extremely high efficiency (>90%). As a consequence the heat to be dissipated is only one fifth of earlier designs, leading to much lower temperatures within the amps and making the use of heat sinks obsolete.

This principle has been known for decades, but time was needed to develop units that perform at the leading edge in sonic reproduction quality and yet still maintain the high efficiency mentioned previously. The ADAM units use the new technology for both the amp and the power supply section (i.e. no more transformers) combined with state of the art input and filter sections to achieve the best in multi-channel active studio monitoring.

ADAM Audio A7XGB Powered Monitor Features:

  • Limited-edition glossy black finish
    Excels at nearfield monitoring
    Equipped with the X-ART tweeter and a large (7") midwoofer
    50W A/B tweeter amplifier
    100W PWM midwoofer amplifier
    Upper corners slanted to minimize reflections
    Large, double bass reflex tubes
    ±4dB gain for the high frequencies
    Two shelf filters for the high and low frequencies
    XLR (balanced) and RCA (unbalanced) connectors


ADAM Audio A7XGB Powered Monitor Specifications:

  • Mid-Woofer
    Number: 1
    Basket Ø: 7" (177.8mm)
    Voice coil Ø: 1.5" (38mm)
    Cone material: Carbon/Rohacell/Glass Fiber

    Tweeter
    Number: 1
    Type: X-ART
    Diaphragm area: 4" (2420mm)
    Equivelent diaphragm Ø: 2" (56mm)
    Velocity transform ratio: 4:1
    Diaphragm weight: 0.17 g

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

    Control panel
    Input Sensitivity: -8 to +14dB
    High shelve > 5 kHz: ±6dB
    Low shelve < 300 Hz: ±6dB
    Tweeter gain: ±4dB

    Input connectors
    Analog: XLR / RCA

    General data
    Frequency response: 42Hz - 50kHz
    THD: 90dB/1m > 100 Hz: =0.5 %
    Long term output: =106dB
    Max. peak: =: 114dB
    Crossover frequencies: 2500Hz
    Input impedance: 30kOhm
    Weight: 20.3 lb. (9.2kg)
    Magnetically shielded: No
    Height x Width x Depth: 13.5" (400 mm) x 8" (255 mm) x 11" (320 mm) Warranty: 5 Years


Product Reviews
(Based on 1 reviews)
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  • Exactly the A7X but glossy...

    As reviewed by Daniel Czarnecki on 10/1/2012

    For details about the A7X, look at the A7X product reviews. I have listened to the A7X's extensively, and I own the A7XGB's, and they both sound the same. These are A7X's, just with a glossy black finish. The glossy black is surprisingly less susceptible to fingerprints as I imagined. It looks really nice, as well.

    1 of 2 people found this review helpful.
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