Installation guide

The microphone should be mounted about 2 ft to 3 ft (or 60 cm to 1 metre) from the speaker and

lined up with the tweeter axis. Best results will be obtained if you use a microphone stand with a

boom to support the microphone.

If larger speakers are used it may be necessary to mount the microphone further from the

speaker, in order to reduce the angle between the drivers and the microphone (and any

associated off-axis effects). However, moving the microphone further from the speaker will

potentially increase measured room effects and /or reduce the period of the measurement before

the first room reflection, hence the reason for the suggested distance of 3 feet.

Better results may be obtained by measuring the speaker outside, provided that a quiet location is

used. One method, particularly useful for large speakers, is to rest the speaker on the ground,

pointing up at a 45 degree angle. The microphone should still be lined up with the speaker's

driver axis, i.e. it will be pointing down at the speaker at a 45 degree angle. When measured with

this method, the speaker measurement can be similar to that obtainable in an anechoic chamber.

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The microphone should be connected to the PDC using the microphone cable supplied with the

analysis kit. Note: the microphone input has 45 V phantom power on it.

Some microphones need time to 'settle', after connecting them to a phantom power source, and

prior to making a measurement, so you should ensure that you have plugged the microphone into

the PDC at least one minute prior to performing a measurement.

Each microphone has a unique calibration profile, determined by measurement of that

microphone by DEQX or the microphone manufacturer. The calibration profile for the microphone

is supplied in a microphone file, with a .mic extension, provided on the CD supplied with the PDC.

To ensure that speaker measurements are accurate, the calibration profile for the microphone

must be installed on your PC before any speaker measurements are carried out.

Note: We do not support or recommend the use of microphones other than those supplied by

DEQX.