The PQM-1 is designed to be adjusted with the aid of a Real Time
Spectrum Analyzer. The analyzer will provide visual feedback when
following this simple procedure.
A. Plug-in one of the supplied frequency
modules into the PQM-1’s module socket.
It is from this module’s range of frequencies
that you will select your center frequency.
B. Turn-off amplifier. Remove amplifier
cover and locate the Accessory Port.
C. Remove the two header jumpers and
locate the missing pin (“key”) on the port.
D. Align the blocked receptacle on the right
angle header connector with the missing
pin and press the PQM-1 onto the mount-
ing port. Note: after adjusting, you must
follow Step 3 for final installation.
E. Set system to a moderate volume level
and play pink noise.
F. Rotate the boost/cut control clockwise
(fully) to +18 dB. The RTA’s display will
now show you the position of the center
frequency
and “Q” settings of the PQM-1.
G. Rotate the frequency control to the frequency you wish to adjust.
H. Next, rotate the “Q” control to the width of the dip or peak in
response that you are equalizing
I. Finally, adjust the gain control to achieve the desired response curve.
BOOST
/
CUT
FREQUENCY
VERTICAL HEADER
ACCESSORY PORT
FREQ
.
MODULE
SOCKET
“Q”
MOUNTING
PORT
HEADER
CONNECT
OR
FREQUENCY
BOOST
/
CUT
“Q”
STAND
-
OFF MOUNTING HOLE
INSTALLING THE PQM-1
STEP 1: Locating the Connectors
INSTALLING THE PQM-1
STEP 2: Adjusting the PQM-1
INSTALLING THE PQM-1
STEP 3: Final Installation of the PQM-1
A. Turn-off amplifier. Remove PQM-1 from its “vertical” mount-
ing position. See Step 2
B. Align the white stand-off with the hole on the rear of the PQM-
1 circuit board. Next, align the blocked receptacle with the miss-
ing pin on the mounting port. Press the PQM-1 onto the port and
secure it to the stand-off by applying downward pressure.
C. Turn amp on and audition the system. If further adjustment is
necessary, the PQM-1 may be adjusted when mounted in this final
mounting position.
A. Remove the PQM-1 from the packaging and inspect the
circuit board.
B. Locate the header connectors soldered onto the top and
bottom of the circuit board. See illustrations 1.
C. Notice that one of the openings on both header connec-
tors is blocked by white filler material. The PQM-1’s mount-
ing system utilizes this blocked receptacle as the “key” to
insure proper positioning when installing the PQM-1 onto
the amplifier’s mounting port. See illustration 2 and 3.
D. During the “tuning process”, the PQM-1 may be
installed “vertically” using the right angle header connec-
tor. See illustration 2. However, the final mounting position
must be in a “horizontal” position (using the header con-
nector on the bottom of the circuit board) to allow the cover
to be re-attached. See illustration 3
illustration 3
illustration 2
illustration 1
BOTTOM OF
PQM-1
CIRCUIT BOARD
TOP OF
PQM-1
CIRCUIT BOARD
HEADER CONNECTOR
LOCATING
“
KEY
”
RIGHT ANGLE
HEADER CONNECTOR
