High Frequency (Treble) Response Selection:
The BQC has the added feature of allowing you to choose from 4 different
high frequency response curves. This is a nice feature especially if you are
using the BQC with passive pickups. The following diagrams show the dip-switch
positions and the graphs show the resultant frequency response.
The BQC Control is an equalizer style control, offering both boost and cut
at the same frequency locations. The control also features a center detent
(click) that lets you know when no equalization is in effect.
Low Frequency (Bass) Response:
The BQC has a fairly standard bass response boost and cut. Its slope is
6dB per octave and is centered at 50Hz. As you can see in the graph
on the left the signal can be boosted by +12db (Red Line) or cut by
-12dB (Green Line). A center detent (click) is provided on the control
to let you know when the frequency response is flat or unaffected
by boosting or cutting.
Mid-Range Frequency Response:
One of the primary features of the BQC is it’s mid-range control. It allows you to
choose the frequency you want to boost or cut from 100 to 1000 Hz. The concentric
mid-range pot has two sections. The lower control chooses the frequency, while the
upper control lets you choose the amount of boost or cut you want. The maximum slope
is 12dB per octave at full gain or cut.. There is also a center detent (click) in the center
of the upper control to let you know when the control is not having any effect.
MID FREQUENCY SELECTION (LOWER CONTROL)
MID BOOST OR CUT (UPPER CONTROL)
BASS BOOST OR CUT (LOWER CONTROL)
TREBLE BOOST OR CUT (UPPER CONTROL)
BASS/TREBLE
CONTROL
BQC-HZ System Page 2
Installation Instructions:
EMG Model: BQC-HZ System
10KHz
1KHz
20Hz
10 dB/div
BQC CONTROL BASS RESPONSE
10KHz
1KHz
20Hz
10 dB/div
ON/ON
BQC CONTROL (TREBLE RESPONSE: ON/ON)
10KHz
1KHz
20Hz
10 dB/div
OFF/ON
BQC CONTROL (TREBLE RESPONSE: 1 OFF/2 ON)
10KHz
1KHz
20Hz
10 dB/div
OFF/OFF
BQC CONTROL (TREBLE RESPONSE: 1 OFF/2 OFF)
10KHz
1KHz
20Hz
10 dB/div
ON/OFF
BQC CONTROL (TREBLE RESPONSE: 1 ON/2 OFF)
VARIABLE MID-RANGE FREQUENCY
1.0KHz
100Hz
20Hz
10 dB/div
10KHz
1KHz
