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Keep in mind that in most cases, cutting offending frequencies is preferable to boosting
other frequencies.
Constant-Q
An important Q-series feature is a sophisticated design that achieves constant-Q
equalization curves. The letter “Q” is a mathematical symbol for bandwidth. Constant
bandwidth means that the bandwidth does not change as the amount of boost or cut is
varied.
Installation
The Q-Series units are intended for mounting in standard 19” equipment racks. Standard
racks come equipped with mounting rails with holes tapped for 10-32 machine screws.
Be sure to use only 10-32 screws. To avoid marring the panel when tightening the screws,
use nylon washers under the screw heads. For best results, all connecting cables should
be shielded. Balanced connections should use shielded, twisted-pair cable.
If the Q-Series unit is not permanently installed in a system, but is available to be used
when and where needed, it may be most convenient to wire the system with a Patch
Bay such as the Furman PB-48. Then, each EQ channel can be easily patched into as
needed. Each EQ input/output pair should be connected to a vertical pair of jacks on
the patch bay. The “normal” jumper on that patch bay circuit board should be cut so
that the input and output are not connected when the channel is not in use.
Available Accessories
Furman Models SC-1, SC-2 Universal Security Covers
These attractive black anodized aluminum covers install over the front panel of any rack-
mount equipment.
SC-1 is for single rack unit equipment (1.75” height) such as the Q-2151 or Q-1311, while
SC-2 is for double rack unit equipment like the Q-1312V, or Q-2312, or two singles.
Their purpose is to prevent unauthorized tampering with the controls of permanently
installed units. This is especially important when room equalization settings have been
carefully and precisely established, yet the equalizer or equalizers themselves must be
in a location where the controls could be deliberately or accidentally changed. When
changes are necessary, the covers may be removed with a screwdriver without
dismounting the underlying equipment from the rack.
Summary of Contents for Q-1311
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