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Adam Audio A8X Powered Monitor Blemished - Like New
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Compact yet powerful suitable for both nearfield and midfield monitoring

With its power and radiation characteristics, the ADAM Audio A8X Powered Monitor is suitable for both nearfield and midfield monitoring. With a price/performance ratio that could hardly be better, this monitor is a perfect entry into these monitoring fields.

The A8X is equipped with the X-ART tweeter and a large (8.5") midwoofer, a combination that adds both a very deep and yet very tight bass response to the unsurpassed reproduction qualities of the ADAM proprietary tweeter: a licence to thrill.

Cabinet- and bass reflex-construction
Like the other AX-Series models, the upper corners of the A8X are slanted to minimize reflections. The very large, double bass reflex tubes on the front have been specifically designed to perfectly match the midwoofer with its large voice coil.

Amplification and controls
With a 50W A/B amplifier for the tweeter and a 150W PWM amplifier for the midwoofer, the A8X has power in abundance and is the brawny monitor of the AX-Series.

On the rear panel are several controls: a gain for the high frequencies (± 4dB) and two shelf filters for the high and low frequencies. There are both XLR (balanced) and RCA (unbalanced) connectors on the rear panel of the speaker, which allow the A8X to be used in almost any application.

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 A8X Powered Monitor Features:

  • Suitable for both nearfield and midfield monitoring
    Equipped with the X-ART tweeter and a large (8.5") midwoofer
    50W A/B tweeter amplifier
    150W 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 A8X Powered Monitor Specifications:

  • Mid-Woofer
    Number: 1
    Basket Ø: 8.5" (220 mm)
    Voice coil Ø: 1.5" (38 mm)
    Cone material: Carbon/Rohacell/Glass Fiber

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

    Built-in Amplifiers
    Mid-Woofer: 1
    Type: PWM
    Amp. power RMS / music: 150 W / 225 W
    Tweeter: 1
    Type: A/B
    Amp. power RMS / music: 50 W / 75 W

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

    Input connectors
    Analog: XLR / RCA

    General data
    Frequency response: 38 Hz - 50 kHz
    THD: 90dB/1m > 100 Hz: =0.5 %
    Long term output: =112 dB
    Max. peak: =: 120 dB
    Crossover frequencies: 2300 Hz
    Input impedance: 30 Kohm
    Weight: 28.7 lb. (13 kg)
    Magnetically shielded: No
    Height x Width x Depth: 15.5" (400 mm) x 10" (255 mm) x 12.5" (320 mm) Warranty: 5 Years


Product Reviews
(Based on 3 reviews)
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Viewing Reviews 1 - 3 of 3
  • Wow

    As reviewed by Marcus Waughop on 3/26/2012

    I knew I was getting good speakers when I purchased the A8X's, but I had no idea they would be this good...If you are struggling with getting a good mix, these speakers will definitely help...the sound clarity is top notch, and the bass is pristine...I will not need a sub in the bedroom sized room I'm in...The bass ports, the volume knob, and the power switch located on the front panel is a huge plus for me, as i like to feel how much air is coming out of the ports as a reference...The bass is super clear and tight....way more than i expected from the woofer...The tweeter is amazingly clear...In the price range, I don't think you will find a better speaker.

    1 of 1 people found this review helpful.
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  • Amazing speakers

    As reviewed by Kevin Sheridan on 1/6/2012

    I previously owned a pair of Krk V6's with a subwoofer, my mixdown process was never consistent and I struggled often to get a good mix. I wanted to get some speakers with a broad frequency range so I could eliminate the need for a subwoofer. I've heard great things about Adam Audio, and the extended low end on these speakers definitely made these my top choice considering their price. I was a little concerned when I got them that they may suffer from port noise or something similar, but nothing but crystal clear audio from the bad boys, I love them, and I can't wait to continue mixing on them, they are so pleasant to listen to, where the V6's I had previously were kind of harsh. I definitely recommend these speakers to anyone who serious about sound.

    1 of 1 people found this review helpful.
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  • Wow

    As reviewed by chuck w. on 3/28/2011

    This new adam 8x speaker is amazing. I have been so iffy about picking out a new set of monitors listening to everything i could find I listened to the digi designs , equators, and my old favorites the event opals. for the price you can't beat these speakers i was listening to the event opals then the a8x's and wow they did not sound like half the the price of the opals. granite i will say if money wasn't an issue i would go with the opals but with this price it is a steal compared to the higher priced monitors out there

    2 of 3 people found this review helpful.
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