Specifications

ManualsBrandsMartin Audio ManualsOtherWAVEFRONT COMPACT - APPLICATIONS GUIDE

191

192

193

194

195

196

197

198

199

200

1.5.2 DX1 Output Gain and Limiter settings for the W8

Standardising on one good model of power amplifier (preferably the Martin Audio

MA2.8) and correctly set-up controller (preferably the Martin Audio DX1) will

provide the most dynamic system performance and protection whilst simplifying

design and reducing spares inventories.

Gain settings

The following DX1 output gain settings will enable full system performance to be

obtained whilst keeping the console and drive system noise floors inaudible and

avoiding amplifier slew-rate limiting:

W8 - assuming 300Wcont - 600Wpk into 8ΩΩ power amplifiers:

Best-fit Initial DX1

Amplifier Amplifier Amplifier Output GAIN

Example Sensitivity Gain Lomid Himid High

dBu Vrms dB dB dB dB

Martin MA2.8* (38dB) -2 0.62 38 -9 -9 -7

Crest CA9 (x68) -1 0.69 37 -8 -8 -6

Crown MA1202 (0.775v) 0 0.77 36 -7 -7 -5

+1 0.87 35 -6 -6 -4

QSC PL224 +2 0.98 34 -5 -5 -3

+3 1.09 33 -4 -4 -2

Martin MA2.8* (32dB) +4 1.23 32 -3 -3 -1

Crest 4801 (x40) +4 1.23 32 -3 -3 -1

Crown K1 (1.4v) +4 1.23 32 -3 -3 -1

QSC PL218/218A (32dB) +4 1.23 32 -3 -3 -1

QSC PL224A (32dB) +4 1.23 32 -3 -3 -1

Crown MA1202 (1.4v) +5 1.38 31 -2 -2 0

+6 1.55 30 -1 -1 +1

+7 1.73 29 0 0 +2

+8 1.95 28 +1 +1 +3

+9 2.18 27 +2 +2 +4

Crown MA1202 (26dB) +10 2.45 26 +3 +3 +5

Crown K1 (26dB) +10 2.45 26 +3 +3 +5

QSC PL218A (26dB) +10 2.45 26 +3 +3 +5

QSC PL224A (26dB) +10 2.45 26 +3 +3 +5

* Set Martin Audio MA2.8 rear MLS switch to -2dB to match peak output of

unregulated power amplifiers.

Cluster balance (eg farfield-to-nearfield or inner-to-outer) should be adjusted at the

power amplifier controls to maintain limiter tracking. See Section A1.7.

Balancing the system using gain controls in the signal path before the power

amplifiers will cause the higher signal level upper row of a big cluster to start limiting

before the lower signal levels downfills causing tonal changes at the mix position.

MARTIN AUDIO - APPLICATIONS GUIDE, WAVEFRONT COMPACT SERIES

CONTENTS

GUIDES

ENGLISH ONLY