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ADAM Audio

ADAM Audio A7X and Sub10 2.1 Package

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Overview
This solid monitor pairing includes two A7X speakers with a Sub10 subwoofer.

A7X 
More than 30 glowing reviews, numerous awards, and countless dedicated fans made the A7, the predecessor of this new model, a true legend in near-field monitoring. Now, the legend continues with the A7X: All drivers, all amplifiers, as well as the cabinet have been revised, resulting in a speaker that claims nothing less but to be a new benchmark in near-field monitoring.

Driver Technology
The first aspect that distinguishes 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 mm) 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 A7X 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.

Sub10
The Sub10 Mk2 from ADAM Audio is a powerful subwoofer designed to extend the low-frequency capabilities of any near or midfield studio monitoring. A 200W Ice Power amp drives a large (50 mm) voice-coil. This amp stays cool as it uses PWM technology in both the amp and the power supply sections, producing greater than 90% overall efficiency. It can handle its maximum power without danger to the electronics or to the driver. The Sub10 Mk2 powered subwoofer houses an excellent 10" woofer, capable of a frequency response of 25Hz-150Hz.

The ADAM Audio Sub10 Mk2 works with a new down-firing bass reflex tube that, due to its shape and size, avoids unnecessary ventilation noise. For larger rooms or higher levels you can chain as many ADAM subs together as necessary.

The Sub10 Mk2 studio subwoofer has balanced (XLR) and unbalanced (RCA) in and output connectors, and numerous controls to adapt to different room acoustics and requirements. The Sub10 MK2 also has a level control from -60dB to +6dB, a phase ±180 degree switch, a variable upper barrier frequency (50-150Hz), and a switchable 85Hz high-pass filter for the satellite output. In addition, there is a 'signal-on/continuous' switch, which provides the option of automatic power up whenever the subwoofer receives signals/automatic power-
off after 15 minutes of no signal.

The Sub10 Mk2 is an ideal match for ADAM monitors such as the P series or the S1A, S2A, S2.5A or S3A studio monitors. In any small to medium sized control room, they guarantee powerful yet precise bass response.

Features

  • Active near-field with 7" woofer
  • Solid response down to 42Hz
  • Award-winning X-ART high end
  • Small footprint, great for project studios
Specs

A7X and Sub10 2.1 Package Specifications:

A7X General
  • Size: Near-field
  • System type: Active
  • Configuration: 2-way
Drivers
  • Low-frequency driver: 7 in.
  • Mid-frequency driver: Not applicable
  • High-frequency driver: 2 in.
  • Full-range driver: Not applicable
  • Driver type: Carbon Fiber
Sound
  • Frequency response: 42Hz–50kHz
  • Max peak SPL: 106dB
  • Amplifier class: A/B
  • Output power: 75W
  • Onboard Features
  • Input connectors: XLR, RCA
  • Standby mode: Info not available
  • Acoustic space control: No
  • Power indicator: Yes
Other
  • Width: 8 in.
  • Height: 13.5 in.
  • Depth: 11 in.
  • Weight: 20.3 lb.
  • Enclosure type: Ported
Sub10
     Subwoofer
    • Number: 1
    • Basket: 15.5" (390 mm)
    • Voice coil: 4" (100 mm)
    • Cone material: Aluminium
    Built-in Amplifiers
    • Subwoofer: 1
    • Type: PWM
    • Amp. power RMS/music: 1,000W/1,200W
    • Input connectors
    • Analog: XLR/RCA
    • General data
    • Frequency response: 20 Hz - 150 Hz
    • Max SPL with sine wave acoustic 100Hz to 3kHz at 1m: ‰120 dB
    • Crossover frequencies: 50 - 150 Hz
    • Height x Width x Depth: 25" (635 mm) x 18.5" (470 mm) x 20.5" (525 mm)
    • Warranty: 5 years
    • Includes: Power cord, manual
    Q&A
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