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A classic ATC Soft Dome Monitoring - Friends around the world (special limited edition print) poster 66/100 signed by ATC's founder and chief engineer Billy Woodman on display here at Musicraft (Derby).
The Absolute Sound reviews ATC's SCM19AT SL Active Tower monitors
http://www.theabsolutesound.com/articles/atc-scm19a-loudspeaker/
ATC SCM19AT SL Active Tower monitors
ATC SCM19AT SL RRP £4990/pair
The SCM19AT system is an active version of the Company’s SCM19 award-winner, uniting proprietary, optimised driver/amp pairings in a slender floor standing design…
ATC, Acoustic Transducer Company, is a specialist British manufacturer of loudspeaker drive units and complete sound reproduction systems, including the relevant electronic equipment. ATC designs and manufactures the finest and most accurate of monitors in the world. ATC achieves this by designing and manufacturing loudspeaker drive units and systems to achieve levels of performance far in excess of the industry norm. ATC has kept to its aims of building loudspeakers and electronics which employ the most effective of modern engineering principles. ATC don't respond to competition, instead ATC responds to advances in technology that enables ATC to improve their products. ATC's goal is to have loudspeakers as near perfection in performance as possible by having the lowest possible distortion.
By selecting ATC you join a group of music lovers, professional audio engineers, educators, studios, and musicians across the world that understand the value of the engineering that goes into every ATC product.
ATC’s products are installed at some of the world’s most prestigious multi-channel studios and auditoria. Where ever the best is required you will find ATC.
http://vimeo.com/107575611?from=outro-embed (ATC's 40th Anniversary Celebration video)
http://atcforums.co.uk/pdf/ATC%20CORP%20BROCHURE.pdf (ATC Corporate brochure)
ATC Transducer. The sound of accuracy. Naturally.
http://www.hifiwigwam.com/an-exclus...active-atc-scm-19at-by-richard-bowles-rabski/
HiFi Wigwam - An exclusive real review of ATC's SCM19AT SL Active Tower monitors by Richard Bowles (Rabski)
https://www.speakershack.co.uk/articleResult.php?subject=1&record=1729
The Speaker Shack reviews ATC's SCM19AT SL Active Tower monitors
http://www.the-ear.net/review-hardware/atc-scm19a-floorstanding-active-loudspeaker
The Ear reviews ATC's SCM19AT SL Active Tower monitors
"I could go on but hopefully the crux has been communicated, this ATC like its range mates is not designed to elaborate on the signal, it exists to let you hear it like it is. In this respect it sounds more like a studio monitor than your average domestic loudspeaker and what this does is focus on the playing, singing and performance rather than the sound. So ATCs are speakers for music junkies, especially those who like their music at the same sort of sound pressure levels enjoyed by many musicians. They are a blank canvas at the mercy of the signal, get that right and you have an unusually good loudspeaker, one that will keep you enthralled to the end of every album."
Positive Feedback reviews ATC's new SCM19AT SL Active Tower monitors
http://positive-feedback.com/reviews/hardware-reviews/atc-scm19at-active-tower-speaker-system/
“…also takes a company with diverse engineering expertise to cover electronics, mechanics, electro-mechanics, and other disciplines and this is rare. ATC clearly has the engineering talent required as they have been in business over 40 years and producing active speakers for many of them. The SCM19ATs are a wonderful advancement in the state of the art of active loudspeakers. You could easily spend three times as much on comparable separate components and not do as well. I strongly encourage you to seek out the ATCs and give them a listen.”
Michael Wechsberg | Positive Feedback 09-06-2016 | | Issue 87
http://hifipig.com/atc-scm19a-active-loudspeakers/
Hi-Fi Pig reviews ATC's new SCM19AT SL Active Tower monitors
http://atcloudspeakers.co.uk/wp-content/uploads/2016/07/HFC_413_Exotica_ATC_Reprint-LOW.pdf
Hi-Fi Choice reviews ATC's new SCM19AT SL Active Tower monitors
"Clearly shot through with the solid engineering and acoustic expertise loved by fans of ATC around the world, the SCM19A is an important and effective addition to the company’s extensive domestic line up. Used in anger with high octane rock it will make most similarly sized passive floorstanders sound somewhat flat and loose. But it does the delicate stuff with great care and finesse as well. A better advert for properly implemented active design at a relatively sane price I’ve yet to hear.”
David Vivian, Hi-Fi Choice August 2016.
ATC Loudspeaker Technology’s new SCM19 Active Tower SL speaker system will deliver the company’s reference-quality audio from an elegantly curved floor-standing design, just 370mm wide and under a metre in height. Identical acoustically to ATC’s award-winning passive SCM19SL 2-way system but utilising the 19 litre volume in a slim tower format, the SCM19AT SL combines high aesthetic appeal with the widely acknowledged performance benefits of ATC active design to create a compelling speaker proposition for music lovers.
The SCM19AT SL’s braced, sealed and curved multi-layer laminated cabinet, which is precision-finished in cherry or black ash real-wood veneer, provides a rigid and optimally damped environment for the Company’s acclaimed SH25-76 Soft Dome tweeter and 150mm Super-Linear mid/bass driver. Drive units are individually powered by an upgraded bi-amp pack (also proprietary), comprising ATC’s discrete MOSFET Class A/B modules, providing 32W of continuous power to the HF section and 150W to the bass.
ATC SH25-76 Tweeter
Sharing technology with the renowned ATC Soft Domed mid-range drive unit, the SCM19AT SL's tweeter employs a unique dual suspension system, designed to suppress rocking modes even at high power output levels. The ATC configuration of a short edge-wound voice coil in a long, narrow magnetic gap ensures exceptionally low distortion throughout the tweeter’s operating band and removes the need for ferrofluids, which can dry out over time, compromising performance. A complex-shaped, soft-domed diaphragm extends high frequency range and offers a smooth off-axis response. The tweeter’s 15,000 gauss (1.5 tesla) neodymium magnet has a black heat-treated top plate, which dissipates heat away from the voice coil to maintain high power handling and low power compression. A precision-machined 5.5mm rigid alloy waveguide provides optimum dispersion with a flat on-axis frequency response and resonance-free operation.
ATC SH25-76 HF Unit used in curved SCM19AT SL active monitors
ATC's security guard
ATC SB75-150 SL mid/bass driver
The SCM19AT SL’s 150mm ATC SL mid/bass driver utilises a carefully weighted doped fabric cone with a 75mm soft dome – exceptional for its broad and even dispersion of mid-band frequencies. The cone is driven by an ‘under-hung’ (short coil/long gap) motor using a huge 9kg ‘Super Linear’ magnet system, which is unique to ATC loudspeaker systems. The 75mm ribbon wire voice coil is meticulously milled and wound in-house by ATC. ATC’s familiar under-hung motor topology maintains linear coil force and inductance, even at high drive levels, keeping distortion low.
ATC SB75-150 SL mid/bass drive unit used in curved SCM19AT SL active monitors
Electronics
The SCM19AT SL’s proprietary two-way on-board amp pack design has been revised to reduce noise and distortion (a further -10dB @ 10kHz), while achieving a lower operating temperature for improved reliability. The design includes protection circuits for both DC offset and thermal overload. Mid frequency THD is vanishingly low at 93dB/0.002%, and a very wide bandwidth of 200 kHz ensures the accurate reproduction of musical transients. ATC’s Grounded Source output stage modules are fed by a newly developed two-way active crossover section featuring 2nd order modified Butterworth circuitry with phase compensation for each crossover point. The advantage of active crossovers is that their response remains unaffected by variable voice coil impedance, while the use of phase compensation enables phase coherency at the crossover points, improving the SCM19AT SL’s tonal balance and enhancing imaging for a pin-point stereo field. As usual system input is via balanced XLR.
The ATC SCM19AT SL – the first active 19 in the Company’s history – is designed for optimum performance with the grille attached, although the difference in performance without the grill is minimal. Finished in anthracite grey, the metal grille fixes to the cabinet via hidden magnets. Designed and manufactured by ATC entirely in-house, the SCM19AT SL offers the ownership of a hand-built ruggedly engineered speaker system, world famous for musical accuracy and high power output. Like all ATC products, the SCM19AT SL is backed by a six-year warranty.
Features
• New ATC designed and built dual suspension 25mm Soft Dome HF unit with precision alloy wave guide
• “SL” spec bass driver with 75mm integral Soft Dome
• 9kg optimised short-coil/long gap motor assembly
• On-board grounded source 182 watt Class A/B Bi-amplifier
• Active filters and overload protection
• 6 year warranty
Specification
• Drivers: HF ATC 25mm dual suspension Tweeter, Mid/LF ATC 150mm SL
• Matched Response: +/- 0.5dB
• Frequency Response (-6dB): 54Hz-22kHz
• Dispersion: ±80° Coherent Horizontal, ±10° Coherent Vertical
• Max SPL: 108dB
• Crossover Frequency: 2.5kHz
• Connectors: Male XLR
• Input sensitivity: 1V
• Filters: 2nd Order critically damped with phase compensation
• Overload Protection: Active FET momentary gain reduction
• Fault Protection: DC fault protection and thermal trip. Fault indication on rear panel mounted LED
• Amplifier Output: 150W LF, 32W HF
• Cabinet Dimensions (HxWxD): 980x370x344mm (spikes add 25mm to height, grill adds 34mm to depth)
• Weight: 31kg/68.2lbs.
The advantages of active operation
• Perfectly matched dedicated amplifiers for each frequency band
• Active crossover filters with phase correction ensure accurate timbre, excellent imaging and source location
• A flat magnitude response that is not changed with power input level
• A 20dB improvement in intermodulation distortion
• Better controlled low frequency
• A greater dynamic range for the same input power
ATC SCM100ASL Professional Monitors used here at Musicraft (Derby)
ATC SCM100ASL Professional Monitors used here at Musicraft (Derby)
ATC SCM100ASL Professional monitors
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Thanks
Rick @ Musicraft