User Manual

eXtended Accelerating Ribbon Technology
The X-ART tweeter
The lack of a traditional voice coil in X-ART tweeters results in a very
flat impedance (fig. 1). Please note the vertical scaling - in a normal
plot, the impedance rise would disappear in the line itself, as it is
1/500 of the normally expected value. Correspondingly, the phase
response is extremely flat within ±1.5°.
In summary, ART tweeters have a high efficiency (approximately 96
dB/W/m), a perfectly linear impedance (3.9 ±0.21), an equally
perfect phase response (±1° within the utilized bandwidth, fig. 2),
excellent directivity characteristics and a superb power handling
capacity; plus, the neodymium magnets and yoke (ring) utilized
in the X-ART units result in perfect magnetic shielding.
A groundbreaking technological innovation with easily discernible
superior performance and no technical flaws, the X-ART driver is
clearly unequalled in the annals of audio history.
The X-ART midrange
Because midrange is musically speaking the most significant
frequency band, the ADAM development team was particularly
interested in building a midrange driver using the same principle as
the X-ART tweeter.
The X-ART midrange driver uses a diaphragm that weighs only a
fraction of comparable voice coil units, and can theoretically
cover the range from 400Hz to 20kHz. The large diaphragm area –
comparable to a 7” conventional midrange unit – permits very high,
uncompressed SPL without compromising dispersion. The unit
has an absolutely flat impedance curve and consequently exhibits
linear phase behavior, with a mere ±0.75° deviation within the
utilized frequency band.
New A/B amplifiers for the X-ART tweeter
Every progress comes with new questions and difficulties. The new
X-ART tweeter with its extended frequency band up to 50kHz (-3dB
point) caused an interesting kind of problem: PWM amplifiers need a
low pass filter to separate the modulation frequency from the audio
band, and this may limit the reproduction capabilities of the new
tweeter.
The perfect partner for X-ART
So ADAM decided to design its own high frequency power amp to
allow the new high frequency unit to live up to its unique talents. A
power amp module was created that shows ultra low distortion (see
fig. 8) figures together with an excellent damping factor. An internal
bandwith of more than 1MHz is externally limited so that the unit
delivers an ultra wide response up to 300kHz. With nothing limiting
the talents of the X-ART tweeter, the monitor has unsurpassed clarity
and openness which will please, amaze and thrill even the most
experienced professional ear.
The result of this technological superiority is unmistakable. There is
a special openness that is immediately apparent to the listener when
auditioning ADAM monitors utilizing the ART midrange drivers. These
monitors are a quantum leap forward in musical accuracy, closely
approaching the ideal loudspeaker.
Fig. 8: THD + Noise @ 1 W, 6,25 W, 25 W (AES17)
Fig. 7: As unspectacular it looks, as spectacular is the audible result:
A/B amplifier for the new X-ART tweeter
Fig. 6: New X-ART tweeter
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