MACRO range installation manual. Issue 6
The Locking DIN pin connections are:-
Pin 1 | No connection | .775V RMS @ 10k ohms |
Pin 2 | out of phase audio | |
Pin 3 | in phase audio | balanced (floating) |
It would normally be appropriate to interconnect two pieces of equipment using
As this is a fully floating input facility, either single or twin core screened cable may be used. This will depend upon the specification of the equipment supplying the input signal.
The input impedance of balanced input slave amplifiers is 10k ohms.
See Fig. 11 for further clarification.
Line surveillance. Mustang product code - TB/S
The standard module fitted to a mixer or
The amplitude of the injected signal is adjusted using the
The loudspeaker current monitoring function as mentioned above would be facilitated by using a MACRO SL/10 unit.
INSTALLATION
Selection of signal input cables
It is essential that input connections are made carefully, using appropriate screened cable, soldered to DIN connector plugs, and using the appropriate terminal numbers indicated in the section describing the input modules in this manual. Unscreened ìtelephoneî type cables are NOT suitable. Either twin conductor, or single conductor types may be used depending upon the application. For long fixed cable runs, a cable with a conventionally braided outer shield is preferable to a
It is not possible in this manual to be specific about the exact types of input cable for use in any particular amplification system, as many practical factors will need to be taken into account. However, as a guide, we would recommend the following:
Balanced lines should be wired in twin, twisted core, screened cable with a conductor size of at least 0.22sq.mm., and preferably 0.5sq.mm. This is equally valid for dynamic or
Paging microphone lines will need an extra two conductors to operate the priority circuit of the amplifier. These need not be screened. For short runs, (up to 2 Metres), paging microphones may be connected using
Line level cables, such as those between a tape recorder and the amplifier, which may be up to a few metres in length are less critical and may be run using
Selection of loudspeaker cables
Use of an appropriate cable for the connection of loudspeakers to the amplifier will ensure that a minimum amount of audio power is lost during transmission to the loudspeaker network. The loss will depend upon several factors - loudspeaker loadings, size of cable conductor, length of cable, etc.
As a general rule, for any particular loudspeaker system, the longer and the thinner the cable, the greater will be the loss. We therefore recommend, that the system is planned such that the amplifier is as near as possible to the loudspeakers, and that the cable used is as large as practicable.
Mineral insulated cables may be used without problem.
Either solid or flexible conductor cables may be used, or a combination of both. It would be appropriate for a heavy duty cable to be used between the amplifier location and the general loudspeaker location - carrying the full load, and for the subsequent loudspeakers of the network to be interconnected with thinner cable.
Fitting Locking DIN connectors
Signal input connections are made via a locking DIN
When connecting the input cables to the locking DIN plugs, it is most important to observe the following:- Page 22