All our amplifiers
includes a wide range of features.
Over the next couple of pages we have attempted to detail some of these benefits....
Thermal Protection...
A two stage thermal protection circuit keeps all our entire amplifier range well protected from embarrassing shut-downs and increases reliability. Auto-resetting thermal protection is also fitted to the large, no compromise, toroidal transformer in the power supplies and each individual channel has separate circuitry and protects independently from DC offset, short circuit, output-clip, and over-temperature....
Clip Compressors...
The whole range of amplifiers have a highly accurate clip detection circuit that operates on any speaker load, monitoring both positive and negative output signal swings. If the output signal becomes large enough to be limited by the supply voltage, clipping occurs. When this happens the respective channel clip LED (CC range) or peak red LED PF & PFX range) will flash for a short period. If excessive clipping is present the output becomes distorted, causing intense heat loss not only in the amplifier but also In the speaker system used.
This can cause considerable damage and eventual destruction of the speaker. By using this accurate clip detection circuit, the amplifier can be limited to deliver only its maximum output by switching in the clip compressor circuit at the rear of the amplifier (CC range) (permanently connected PF & PFX ranges).
Operating in this mode, the amplifier will function normally until clipping occurs which then activates the compressor circuit reducing the signal to give maximum output, clipping occasionally. It should be noted that the duration of the signal clip LED turning red is not respective to the duration of clip but is set to give a clear indication of clip.
As the output is reduced by the compressor circuit, an amber LED is illuminated to display this status (CC range only). The compressor circuit has been developed to give ample speaker protection while remaining virtually inaudible.
Over Temperature Protection...
Should the amplifier overheat due to excessive dust build ups incorrect cabinet venting or fan failure, it will shut down until it has cooled. However sufficient warning will be given by the clip LEDs, clipping before maximum output. If the clip compressors are switched on (CC range) the amplifier output will reduce to avoid unnecessary shutdown. Normal operation is resumed when the amplifier cools.
Short Circuit/Crowbar Protection...
A short circuit or low impedance situation requiring the amplifier to deliver excessive high power will activate the crowbar protection circuitry and the respective channel will shutdown. To reset the protection circuit, turn the amplifier off and then on again.
DC Offset Protection...
If a DC offset occurs across the output, the protection
circuit will activate, disconnecting the load. If the fault clears, the amplifier
will resume normal operation. Inputs are also DC protected.
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