Perreaux Prisma 350 - Manual (Page 35)

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Voltage Gain............................................................................................. 30.7dB
The amount of amplification the amplifier is asserting on the input signal. Gain
can be calculated by dividing the rated output by the input sensitivity.
Dynamic Headroom .................................................................................>1.1dB
This indicates the 350 can provide more than enough extra power to cope with
the sharpest musical transients. Without adequate headroom, an amplifier can
become unstable under clipping conditions. Perreaux amplifiers are intrinsically
stable under all dynamic conditions.
Voltage Swing ......................................................................................... 197V
p-p
Loud transients call for a sudden burst of power from the amplifier to drive the
speakers. This force is voltage. Peak to peak voltage is a more useful
specification than Watts when it comes to delivering power to a speaker.
Maximum Current Output......................................................80A per channel
Current is the power reserve in the amplifier necessary to deliver the burst of
voltage required by the ever-changing audio signal. With more than adequate
continuous current per channel and high volts peak-to-peak, the 350 can easily
meet any challenge music can present to it – whether instantaneous or
continuous. To be specific it can deliver high power into low-impedance loads
and provide great dynamic headroom.
Damping Factor .............................................................. >700, @ 1kHz into 8Ω
Another specification not always provided. One reason perhaps, this
specification is important when indicating an amplifier’s ability to control the
cone behaviour of speaker systems, which are difficult to drive. Perreaux power
amplifiers have high damping factors. Thus exerting massive control over the
speaker system.
Signal to Noise Ratio (unweighted) .............................................................. 100dB
The ratio of desired signal to noise signals present in the output. This figure is
referenced to the rated output of the 350, taking into full account all potentially
annoying hum components.
Input Sensitivity....................................................................................... 1.5V
RMS
Indicates the amount of input voltage required to drive the unit to its rated output
power (350W
RMS
into 8Ω).
Input Impedance..........................................................................................22kΩ
The resistance “load” that is presented to the component that is driving it. The
high value indicates that the power amplifier will not load down the output of
most high quality preamplifiers.