Martin Audio W8L Longbow Application Manual page 92

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
Breaker W8L/Longbow
(e.g.
3 x MA4.2S
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 MA4.2S 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 11 5Vac mains. Please refer to the MA4.2S 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 W8L/Longbow columns to
partially compensate for this air absorption. This progressive shelving is called
band- zoning because one extra mid frequency band and two extra high frequency
bands drive the upper zones of the line array.
4 x 8 x
W8L/Longbow
6 x MA4.2S
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF, 1 DX1
12 x Longbow
9 x MA4.2S
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF
1 LF, 1 MF,
1 HF, DX1
12 x
W8L/Longbow
9 x MA4.2S
2 LF, 1 MF,
1 HF
1 LF, 2 MF,
2 HF, 1 DX1
16 x Longbow
12 x MA4.2S
2 LF, 1 MF,
1 LF, 2 MF,
1 LF, 1 MF,
2 HF, 1 DX1
All material © 2007. Martin Audio Ltd. Subject to change without notice.
16 x
W8L/Longbow
12 x MA4.2S
2 LF, 1 MF,
1 HF
1 LF, 2 MF,
1 HF
1 LF, 1 MF,
2 HF, 1 DX1
1 HF
1 HF