Radial Engineering Ltd.
Q3 Coil Equalizer 500 Module
True to the Music
®
4
Using the Coil EQ
The Q3 features three 12 position rotary controls that are designated as BASS, MID and
HIGH. Each of these features on OFF position and 11 preset curves. Using a simple
microphone and a set of headphones, start by familiarizing yourself with the various EQ
curves in each band. As some of the EQ curves are very dramatic, using headphones will
help to eliminate feedback from occurring.
Note that the HIGH and BASS bands are made up of mostly boost type presets while the
MID band is made up of mostly cuts. This follows the way we humans like to ‘hear’ sound.
Keep in mind, the Q3 is not intended to be a surgical tool, it is designed to enthral and excite.
When using subtractive curves, you will notice that the sound level will appear to drop. This
is normal. Simply adjust the level by increasing the GAIN control to compensate. Be careful!
The Q3 has lots of gain!
CAUTION!
One of the drawbacks to passive coil EQs is that there is no noise preventative circuitry
between the induction coil circuit and the signal path. This means that when you switch
coils, you can encounter clicks and pops. Always monitor at reduced levels while setting
up the Q3. This will help avoid popping which in turn could damage more sensitive
equipment.
Using the ‘Shift Key’
One of the cool features on the Q3 is the SHIFT switch. When set to the right, the effect of
each curve is gentler. When moved to the left, it is bolder and more prevalent. This enables
you to listen to various curves to determine if the general effect is going in the right direction
and then lets you either add or subtract the effect, depending on your musical taste.
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The dashed line represents the standard curve and the solid line represents the “shifted” curve.
Note: As the space between the 12 position rotary switches is very tight, the easiest way to
move the shift switch is to use a pen or tweaker. This is the downside to jamming all of this
control into a 500 series format!
