Power amplifier recommendations, Power capability – Martin Audio WLX User Manual
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WLX sub-woofers may be time aligned without test gear as follows:
1)
Start with the controller outputs delays set as per the above table
2)
Use a laser tape measure to measure the distance to the main system grille and the WLX sub-woofer grille
3)
If the WLX sub-woofers are closer than the main system, increase the WLX controller output delay (2.91ms for
every meter of misalignment)
4)
If the main system is closer than the WLX sub-woofers, increase the main system delay (2.91ms for every meter of
misalignment)
5)
Fine adjust the delay by switching the WLX sub-woofers to reverse polarity, listening to a 70Hz tone and adjusting
the delay for a dip in level
(Note: You MUST complete steps 1-3 before fine tuning!)
6)
Don’t forget to switch the WLX sub-woofers back to normal polarity for maximum summation and impact!
Power amplifier recommendations
The Wavefront WLX Subwoofer has been designed and manufactured for very high performance but will not
give that performance unless power amplifiers are chosen and used intelligently.
Power capability
WLXs provide full performance when driven by professional power amplifiers capable of delivering
undistorted output power into a range of loads as follows:
WLX
1,150 W (AES) into 8 Ohms
2,300 W (AES) into 4 Ohms
and
2,900 W(AES) into 2 Ohms
Please note:
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 the
power quoted 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 over-
sized amplifiers should be avoided.
Martin Audio MA series power amplifiers have regulated rails so it is quite permissible to use slightly
All material © 2007. Martin Audio Ltd. Subject to change without notice.