WSX - assuming 600Wcont - 1200Wpk into 8ΩΩ power amplifiers:
Best-fit Initial DX1
Amplifier Amplifier Amplifier Output GAIN
Example Sensitivity Gain When used as:
Sub-bass Full bass
dBu VrmsdB (>60Hz) (>160Hz)
dB dB
Crown MA5002VZ (0.775v)-2 0.62 42 -4 -9
Martin MA4.2** (41dB) -1 0.69 41 -3 -8
Crest CA18 (x115) -1 0.69 41 -3 -8
Crown MA3600VZ (0.775v)-1 0.69 41 -3 -8
0 0.77 40 -2 -7
+1 0.87 39 -1 -6
+2 0.98 38 0 -5
+3 1.09 37 +1 -4
QSC PL236/236A (36dB) +4 1.23 36 +2 -3
+5 1.38 35 +3 -2
+6 1.55 34 +4 -1
+7 1.73 33 +5 0
Martin MA4.2** (32dB) +8 1.95 32 +6 +1
Crest 8001 (x40) +8 1.95 32 +6 +1
Crest 9001 (x40) +8 1.95 32 +6 +1
QSC PL236A (32dB) +8 1.95 32 +6 +1
+9 2.18 31 +7 +2
+10 2.45 30 +8 +3
+11 2.75 29 +9 +4
+12 3.08 28 +10 +5
+13 3.46 27 +11 +6
Crown MA3600VZ (26dB)+14 3.88 26 +12 +7
Crown MA5002VZ (26dB)+14 3.88 26 +12 +7
QSC PL236A (26dB) +14 3.88 26 +12 +7
** Set Martin Audio MA4.2 rear MLS switch to 0dB to match peak output of
unregulated power amplifiers.
Limiter settings
The Rated Power specification in Section 4.2 indicates the maximum long-term
power dissipation that can be tolerated before driver ageing or damage occurs through
overheating or over-excursion.
When choosing power amplifiers, do not be tempted to exceed the 600W into 8Ω
power rating unless the amplifier's power rails are well regulated (see Section 4.6) -
even with properly set controllers in place. Although Martin Audio drivers are
mechanically designed to survive normal road use and the occasional operator error,
overpowered or bridged amplifiers can cause over-excursions that stress and age
drivers. The best way to get the clean, relaxed sound of an overpowered amplifier is
to choose an amplifier with plenty of current reserve - ie an amplifier with good 2Ω
specification - and avoid running more than two cabinets in parallel.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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