Audioplex QUADTROL Installation Manual

Attenuator type:
Switch:
Connector:
Power rating:
Frequency response: +0, -1 dB worst case (-6 dB tap), +0, -0.2 dB all other taps, 35 Hz-20 KHz.
Transformers:
-34 dB in 12 steps, 8 steps @ -3 dB each, 1 step @ 4 dB, 1 step @ -6 dB, last step
Attenuation:
Fits in a modified plastic double gang box. Will not fit in a metal box!
Mounting:
OPTIMATCH (TM): Will match impedance for almost any situation. Mechanical index (furnished)
permits presetting load impedance multiplication by X2, X4, X8, X16, X32, X64,
etc. Can be changed at any time.
The AUDIOPLEX TECHNOLOGY. QUADTROL(TM) is a 4-channel (or Quad) tapped
autotransformer type volume control for use with multi-channel systems such as surround, multispeaker
stereo, etc. It incorporates the well-known OPTIMATCH(TM) impedance matching system and wide
band tri-filar wound transformers.
The QUADTROL(TM) Will fit in a modified double gang plastic box (back of box needs to be
removed). Will not fit in a metal box! Screw type connectors are provided to ease installation.
A 4-pole, 12 position switch with shorting type contacts is used to provide a wide range of control.
Attenuation steps are 3 dB each except for the last 3, which are 4 dB, 6 dB and OFF respectively for a
total range of 34dB.
The tri-filar wound transformers combined with premium grade high silicon grain-oriented steel
laminations insure the best frequency response on all attenuation taps to be found anywhere! Worst case
response is +0, -1 dB at 20 KHz with an 8 Ohm load, usually encountered at the -6 dB tap which is at
mid-winding. In most cases, response is better than this.
The OPTIMATCH(TM) feature permits adjustment of the control to reflect whatever impedance is
desired from the controlled loudspeaker to the amplifier. This is accomplished by taking advantage of the
fact that the reflected speaker impedance is doubled for each 3 dB step of attenuation. A lock is provided
so that the reflected impedance can be limited to whatever is desired--it can be used to set the maximum
volume limit for the area controlled by the QUADTROL(TM).
The OPTIMATCH(TM) is a different concept in self-impedance matching controls. It can be used
either as a full range volume control, or as an impedance matching unit that can be adjusted to meet the
requirements of your installation. One simple adjustment can be made when the control is connected, and
can be changed to accommodate additions to the installation at any time. ONE SIZE FITS ALL! It is
easily retrofitted to almost any existing system.
INSTALLATION MANUAL
TECHNOLOGY
QUADTROL w/OPTIMATCH
SPECIFICATIONS:
Tapped auto transformer. (4)
4-Pole, 12 position rotary, make-before-break contacts, low torque specifications
for smooth feel.
Screw-tight type, non-removable.
72 Watts RMS continuous 35 Hz-20 KHz, 216 Watts audio.
Measured at full power, 8 Ohm load. Most controls better these specifications.
Tri-filar wound for flat response and minimum phase shift, grain-oriented, high
silicon steel laminations.
OFF.
HOW IT WORKS:
TM
TM