To ensure transparent limiter operation without obvious distortion or pumping, the
DX1 limiter attack and release times are factory preset to be inversely proportional to
the subwoofer's high pass frequency. These attack times allow the power amplifiers to
clip momentarily but not for long enough to be obvious to listeners or cause driver
overheating. It is quite normal to see amplifiers momentarily clipping on the odd
programme peak but continuous clipping would indicate a cable short circuit, wrong
controller settings, excessive power amplifier gain or low mains voltage.
High pass filter range Attack time Release time
>31Hz 45mS 720mS
31Hz - 63Hz 16mS 256mS
The following initial DX1 output limiter settings will avoid voice coil overheating
and minimise amplifier clipping for high quality, trouble free operation.
WSX - assuming 600 W into 8ΩΩ power amplifiers:
Best-fit Recommended
Amplifier Amplifier Amplifier DX1 LIMITER
Example Sensitivity Gain Settings
dBu VrmsdB dBu
Crown MA5002VZ (0.775v)-2 0.62 42 -3
Martin MA4.2** (41dB) -1 0.69 41 -2
Crest CA18 (x115) -1 0.69 41 -2
Crown MA3600VZ (0.775v)-1 0.69 41 -2
0 0.77 40 -1
+1 0.87 39 0
+2 0.98 38 +1
+3 1.09 37 +2
QSC PL236/PL236A (36dB)+4 1.23 36 +3
+5 1.38 35 +4
+6 1.55 34 +5
+7 1.73 33 +6
Martin MA4.2** (32dB) +8 1.95 32 +7
Crest 8001 (x40) +8 1.95 32 +7
Crest 9001 (x40) +8 1.95 32 +7
QSC PL236A (32dB) +8 1.95 32 +7
+9 2.18 31 +8
+10 2.45 30 +9
+11 2.75 29 +10
+12 3.08 28 +11
+13 3.46 27 +12
Crown MA3600VZ (26dB)+14 3.88 26 +13
Crown MA5002VZ (26dB)+14 3.88 26 +13
QSC PL236A (26dB) +14 3.88 26 +13
** Set Martin Audio MA4.2 rear MLS switch to 0dB to match peak output of
unregulated power amplifiers. (See illustration in Section 3.5.1)
All material © 2007. Martin Audio Ltd. Subject to change without notice.
To Next Page
Loading...
Need help?
General
