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Thermal Overheat Protections<br />
High Frequency Protection<br />
Temperature sense for both, power transistors and transformer(s).<br />
Front-to-rear cooling system by means of extremely<br />
quiet 3-speed fans.<br />
High frequencies, significantly exceeding the human audio<br />
spectrum may damage the connected speaker’s voice coils.<br />
All DYNACORD amplifiers are equipped with reliable HF<br />
protection circuits.<br />
Peak Current Limiters<br />
Short Circuit Protection<br />
keep the amplifier reliably within safe operating conditions.<br />
In addition they activate the dynamic audio limiters<br />
in case that the peak current threshold is exceeded and<br />
thus keep the signal fed into the speakers at a level of<br />
maximum 1% THD. This protects the speakers from being<br />
blown due to clipping amplifier signal.<br />
A short circuit in the speaker cable or the speaker itself<br />
may damage the power transistor of the amplifier. All<br />
DYNACORD amplifiers are equipped with respective short<br />
circuit protections that reliably protect the amplifier even<br />
under full load or in bridged operation.<br />
DC - Protection<br />
Back-EMF Protection<br />
DC voltage at the output will kill the connected speaker’s<br />
voice coils. All DYNACORD amplifiers feature reliable DC<br />
protection.<br />
By nature of physics loudspeaker systems represent a complex<br />
reactive load and feed a significant portion of the<br />
energy back into the amplifier. This EMF {Electro Motive<br />
Force} phenomenon is permanently existing regardless the<br />
type or brand of the amplifier and speaker. In the standard<br />
situations where the speaker cabinets work properly. The<br />
EMF-phenomenon does not cause any damage to the<br />
amplifier. In case of a faulty speaker or crossover however,<br />
the amount of energy fed back into the amplifier may significantly<br />
exceed normal levels resulting in damage of the<br />
amplifiers power transistors.<br />
All DYNACORD power amplifiers are equipped with a<br />
unique back-EMF protection that reliably protects the<br />
amplifier against such conditions even in case of cabling<br />
faults when somebody i.e. connects output A with output B<br />
by mistake.<br />
22 P O W E R A M P L I F I E R S
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