Hands On: Atlantic Technology H-PAS-1 Speaker
Atlantic Technology demoed floorstanding prototype at CEDIA Expo 2009 in Atlanta.
Atlantic Technology H-PAS-1
Atlantic Technology H-PAS-1
September 17, 2009 by Audioholics.com

Atlantic Technology demoed a new prototype speaker system at CEDIA Expo 2009, the floorstanding H-PAS-1, featuring H-PAS technology (Hybrid Pressure Acceleration System) that it claims allows speakers to achieve targeted bass performance with 50 percent smaller cabinets, smaller drivers, and lower costs.

The company will be licensing H-PAS to other manufacturers. Atlantic Technology has joined forces with Solus/Clements to develop, market, and license a revolutionary new loudspeaker design protocol capable of delivering deep, low-distortion bass response at output levels unobtainable through conventional bass-alignment techniques.

What is H-PAS Technology?

H-PAS technology will allow speakers with smaller cabinets and drivers to achieve levels of performance normally associated with much larger speaker systems.

The new patent-pending H-PAS system combines elements of several speaker technologies: Bass reflex, inverse horn, and transmission line. Using a unique cabinet design, these technologies are cascaded to pressurize and accelerate low frequencies. The signals travel through a passive resonance/harmonic distortion line filter. The final result is the ability of an H-PAS design to deliver extended deep bass with exceptionally low distortion.

H-PAS does not require the use of special drivers, any kind of on-board electronics or outboard equalization. It is a purely passive system, completely compatible with all amplifiers and AV receivers.

Listening Impressions

The H-PAS-1 demo used two 4.5-inch drivers in an enclosure of approximately 1.4 cubic feet to produce bass that extends to 29 Hz (-3dB) at Sound Pressure Levels that exceed 105dB. Bass harmonic distortion is under 3 percent. Atlantic Technology says comparable performance in a conventionally designed loudspeaker system would require bass drivers of at least triple the size in an enclosure at least twice as large.

The H-PAS-1 had unfinished cabinets and crossover boards laid out on the floor and jury rigged to the speakers. Atlantic Technology played musical score sample tracks from various movies. The low end bass extension was impressive. We would have never imaged a pair of 4.5-inch drivers were capable of pressurizing the room to provide good tactile response.

Music with sustained bass and acoustical instruments was played towards the end of the demo. With normal program material, the bass extension seemed less pronounced, but the system remained clean with no hint of woofer distress. It seemed the benefit of this enclosure was most notable towards the lower end of the bass spectrum near its tuning frequency.

For small driver, moderate sized cabinet constraints H-Pass could be a viable solution, albeit not an in-expensive one. The H-PAS-1 will retail for around $2k/pair. We’d really like to face off a pair of these speakers with a conventional design with larger drivers at around the same retail price to understand its full potential.

The H-PAS-1 tower will ship in Q4 2009 with a larger version featuring dual 6.5-inch drivers early in 2010.

Click here for more on the H-PAS-1 from Audioholics.

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