Martin Audio W8L Longbow Application Manual page 110

Remember that, although the transient power demand will be the same for each
W8LC section (see table earlier), medium to long-term power demand will be
greater at lower frequencies. It is wise to spread the long-term current by supplying a
mixture of low, mid and high frequency amplifiers from each breaker.
Single Phase 4 x W8LC
Breaker 3 x MA2.8S
(e.g.
32A Europe
63A USA)
A 1 LF, 1 MF,
1 HF, 1 DX1
B
C
Three Phase
Breaker
(e.g. 32A Europe
63A USA)
Phase A
Phase B
Phase C
We recommend supplying each MA2.8S amplifier via a 16A cable and 16A
single phase connector for 230Vac mains and via a 32A cable and 32A single
phase connector and breaker for 1 15Vac mains. Please refer to the MA2.8S
manual for further information.
Reminder:
This information assumes the reader is an experienced sound system technician
who is familiar with high quality, low noise system design and works to the
internationally recognized 93/68/EEC Low Voltage Directive for mains safety.
All rack systems should be fully PAT (Portable Appliance) tested for electrical
safety before use.
Why do I need a 6-output DX1 controller for a 3-way cabinet?
When line arrays are used for long throw applications air absorption can cause
significant high frequency attenuation at low humidity. Progressive mid and high
frequency shelving is applied to the upper zones of W8LC columns to partially
compensate for this air absorption. This progressive shelving is called band- zoning
8 x W8LC
6 x MA2.8S
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF, 1 DX1
12 x W8LC
9 x MA2.8S
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF, DX1
All material © 2007. Martin Audio Ltd. Subject to change without notice.
12 x W8LC 16 x W8LC
9 x MA2.8S 12 x MA2.8S
2 LF, 1 MF, 2 LF, 1 MF,
1 HF 1 HF
1 LF, 2 MF, 1 LF, 2 MF,
2 HF, 1 DX1 1 HF
1 LF, 1 MF,
2 HF, 1 DX1
16 x W8LC
12 x MA2.8S
2 LF, 1 MF,
1 HF
1 LF, 2 MF,
1 HF
1 LF, 1 MF,
2 HF, 1 DX1