Getting ready to calibrate – Wisdom Audio DCAB-1 User Manual

Page 20

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Getting Ready to Calibrate

System Connections

Before you start to calibrate your DCAB-1, double check the connections:

• Left and Right balanced outputs of your preamplifier to the corre-

sponding Main Inputs of the DCAB-1.

• Left and Right balanced Hi Frequency Planar Outputs of the

DCAB-1 to the amplifier that is connected to the planar sections
of your Wisdom Audio loudspeakers.

• Left and Right balanced Low Frequency Regenerator Outputs of

the DCAB-1 to the amplifier that is connected to the LFR (woofer)
sections of your Wisdom Audio loudspeakers.

If you have not done so already, now would be a good time to also make sure
that all loudspeaker cable connections are snug and cleanly made.

As in any system, we recommend that the power amplifiers be the last com-
ponents turned on, and the first components to be turned off. That way, if any
“upstream” components in the system emit a turn-on transient of some sort, the
speakers cannot be damaged.

Setting Up the Microphone

Connect the supplied microphone to its input on the rear of the DCAB-1 using
high quality microphone cable. If you need a longer cable, you can “daisy
chain” multiple mic cables together without sacrificing performance. (This is pre-
cisely what balanced cables were originally designed for, after all.
)

Using a microphone stand (not included), place the microphone at the primary
listening position, where your head would normally be.

You may find that this is more easily done if you have a microphone stand that
includes a “boom,” which is a counterbalanced arm that extends out laterally
from the stand. The boom allows the stand to be placed on the floor beside
your chair, and then extends over it to place the microphone at the correct loca-
tion.

Aim the microphone at a center point between your two speakers. The included
microphone is quite omnidirectional, so aiming it is not especially critical.
(Having the microphone’s tip in the correct location is fairly critical however,
even though aiming it is not. Try to get it where your head will be when listen-
ing.)

Connecting the Computer

Using the supplied null modem cable (which looks like a normal serial cable,
with female DB-9 connectors at both ends), connect the serial port of your com-
puter to the RS232 interface found on the DCAB-1’s rear panel.

If you need to extend this cable, you can use a normal male-female serial cable.
Do not use another null modem cable in series with the one provided, since
two null modem cables together result in a normal serial cable. (Technically,
pins 2 and 3 are “crossed” deliberately in null modem cables; if you do this
twice, you are back where you started.
)

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