Hafler SR2800CE - Manual (Page 10)

The Hafler SR2300 and SR2800 amplifiers are two rack height, two channel, fan-cooled professional power amplifiers suit-
able for use in the most demanding sound reinforcement and commercial sound installations. These amplifiers offer out-
standing efficiency by means of three technologies: high-efficiency TRANS•nova Class-G circuitry, high-frequency switch-
ing power supplies, and constant power output/load impedance selection switches.
Introduction
Technical Design Features
WHY A NEW AMPLIFIER TOPOLOGY?
Hafler TRANS•nova amplifiers, the recording studio reference, have a floating +/- power supply for each channel and a
novel drive system covered by U.S. Patents 4,467,288 and 5,567,000. Our challenge was to convert this topology into a
high efficiency design with minimal increase in complexity-yielding an amplifier of outstanding audio qualities, high effi-
ciency and unprecedented value. TRANS•nova Class-G is that answer.
The most common high-efficiency (Class-H) methods raise the rail voltages going to the output devices for higher power
levels. TRANS•nova Class G does not do this. Instead, it operates by forming a triplet or triplex of tracking signals: A, (A+V)
and (A–V), where A is the raw audio output and +/– are the floating rails. The amplifier final output is selected to be at an
appropriate voltage between (A+V) and (A–V) for each condition of the signal. The output voltage and current capability are
each potentially doubled and the power potentially quadrupled–without having to increase the rail voltages fed to the
devices. One or more patents are expected from this technology.
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Specifications
(cont)
DIMENSIONS: (2U) 3.5H" x 19"W x 18.5"D (2U) 3.5H" x 19"W x 18.5"D
(rack handles add 1.25"D) (rack handles add 1.25"D)
WEIGHT: 32lbs. (14.51 kg) 32lbs. (14.51 kg)
19"
3.5"
18.5"
Power
70V
4 Ω
Load
2 Ω 100V
8 Ω
70V
4 Ω 2Ω 100V
8 Ω