2.6Power amplifier recommendations
Wavefront Longthrow loudspeakers have been designed and manufactured for very
high performance over great distances. They are very easy - particularly if power
amplifier racks and controllers are standardised within a system.
Power capability
W8CTs and W8CMs will provide full performance when driven by professional
power amplifiers capable of delivering undistorted output power into a range of loads
as follows:
W8CT & W8CM
250-300W(av) into 8 ohms,
500-600W(av) into 4 ohms
and
1,000-1,200W(av) into 2 ohms.
Please note:
Amplifiers with inadequate headroom before clipping may age high frequency
components due to excessive signal density.
Amplifiers with excessive output may damage voice-coils or age driver suspensions
due to excessive heat dissipation and excursion.
A note about power amplifier output specifications
Most power amplifier manufacturers keep their costs down by using unregulated
supply rails which sag under load. To allow for this sag, manufacturers set their rails
high so that they still meet their quoted output into specified loads. These high rail
voltages allow such power amplifiers to provide outputs 1.5 - 2 times their quoted
power for short-term bursts. Martin Audio products will withstand this potential
doubling of instantaneous power - with suitably set controller limiters - but further,
long-term increases caused by oversized amplifiers should be avoided.
Martin Audio MA series power amplifiers have regulated rails so it is quite
permissible to use slightly overpowered models - with suitably set controller limiters -
without risking uncontrolled power bursts. The MA series power amplifiers’
regulated power rails also ensure maximum performance under the real-world concert
conditions of less-than-optimum mains supplies and low impedance loads.
See Section 1.6.1 for information on the Martin Audio MA2.8 power amplifier.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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