Cinema Grand
Three great systems for a thousand and change
(continued)
By Daniel Kumin
November 2005
ATLANTIC TECHNOLOGY SYSTEM 1200 The 1200 SAT had extremely uniform directivity, producing virtually identical curves for the front left/right and surround channels, with a 6-dB double-dip swoon between 1.5 and 4 kHz. Extreme high frequencies were somewhat less extended than usual for this class of speaker. At ±15° off-axis, the 1200 C center speaker had moderate lobing in the horizontal plane, which became significant by ±22.5° and severe at wider angles. The boundary-compensation feature reduced output by 2 dB below 200 Hz. The High Frequency Energy control cut response by 0.7 dB above 3 kHz in the Reverberant position and allowed 1.5 dB more energy into the room above 3 kHz in the Damped Room position.
The 212 SB subwoofer had modest dynamic capability. Although the crossover dial is marked from 40 to 140 Hz, the actual acoustic turnover frequencies varied only between 70 and 120 Hz over the full range of rotation. There was virtually no crossover/level control in the top half of control range, but the level dropped nearly 5 dB in the 40-Hz position.
