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BM15A Owner’s Manual - Issue 2 Page 2
November 1997
Setting Up
Mains Power Connections
Mains power is applied via a fused IEC inlet. The unit must be earthed. The voltage selector
switch is used to match the unit to the mains voltage in your territory. The mains fuse must be
the correct value for the voltage selected, 115v requires a T4A fuse while 230v requires a
T2A fuse. The ‘T’ signifies a slow blow type fuse.
You must ensure that the correct voltage and fuse have been selected before
switching the unit on.
Audio Connections
Audio input is via a female XLR connector. The input is electronically balanced with +ve on
pin 2, -ve on pin 3 and ground on pin 1. If your signal source is unbalanced it is usual to
connect the unused signal pin (i.e. Pin 3) to ground. This is normally done inside the
connecting cable. For best results use only good quality screened cables and connectors.
Positioning
The BM15A is designed as a ‘nearfield’ or 'mid-field' monitor and would normally be
positioned 1-3m from the listener. They can be mounted on stands or on the meter bridge of
the console (providing this is substantial enough). For best results the speakers should be
‘aimed’ at the listener in both vertical and horizontal planes.
They may be used in a horizontal orientation i.e. lying on their sides, but the acoustic
dispersion has been optimised for vertical use. Also the heatsink will provide improved
cooling when used vertically.
In any situation ensure that there is adequate space for ventilation around the heatsink.