Peavey StudioPro 40 - The Front Panel; EQUALIZATION SECTION; High Control with Pull Thick; Mid Control

THE FRONT PANEL
ON/OFF SWITCH
The on/off switch is a rocker-type switch and should present no problems in operation. In the on position, a
red LED will illuminate showing that power is being supplied to the unit.
MASTER REVERB
The amount of reverb is controlled by the master reverb knob. Turning the control clockwise increases the
amount of delayed (reverb) signal. Counterclockwise will decrease the reverb effect. The reverb may also be
remotely controlled with the optional footswitch.
EQUALIZATION SECTION
The equalization controls (low. mid, high/Pull Thick) are highly effective circuits and their tonal
capabilities are designed to slightly interact with each other.
The high control with Pull Thick switch
The high control is used to tailor the amount of treble (highs) of the musical instrument and the preamp. It
should be noted that when using distortion (overload) textures, too much high-end can cause a harshness that
will detract somewhat from the warm, tube-like sound of the Saturation” circuit. The high control also has a
“pull" switch called Thick. When activated. Thick acts as a mid-range boost and is especially useful for
enhancing the distortion characteristics (Saturation’") of the Studio Pro ™ 40,
NOTE:
WHEN THIS PULL SWITCH IS ACTIVATED, THE HIGH FREQUENCIES MAY BECOME LESS
PRONOUNCED BECAUSE OF THE FULLNESS ADDED BY THE BOOSTED MIDDLE
FREQUENCIES. IN ADDITION, THE ACTION OF THE TONE CONTROLS, ESPECIALLY THE
MIDDLE CONTROL, IS LESS PRONOUNCED AND EFFECTIVE.
The Mid Control
The Mid control is vital to the tone coloration of the instrument’s signal — especially guitar. A good “rule of
thumb" for the mid control is to cut (reduce) theamountofmidswhenclean, undistorted tonalities are desired.
Warmer “fatter" tonalities for enhancement of distortion sounds can be obtained by rotating the control
clockwise (boost). For maximum mid-range boost, use the Pull Thick switch located on the high control (see
high/Pull Thick).
The Low Control
The Low control determines the low frequency response of the Studio Pro'" 40. Rotating this contr'
clockwise increases the amount of bass while counterclockwise rotation reduces the low end. We recommei
that care should betaken not to overboost the low control. Overboosting low frequencies tend to prematurely
overload the power amp. Overboosting of the low control also reduces the system's projection capabilities,
usually at the expense of the middle and upper frequencies.
THE GAIN SECTION
Post Gain
Basically, the post gain control acts as a master volume and sets the overall gain (volume) level for the
Studio Pro ™ 40's power amp. The post gain control also provides a dual purpose and this must be understood to
achieve the best sounds from the Studio Pro ™ 40's clean/distortion capabilities. To achieve the best overload
(distortion) from the Studio Pro ™ 40. we recommend that the post gain control be set no higher than it’s 12
o'clock or #5 position. Setting the post gain control higher than 5 may cause the power amp (in conjunction
with the pre gain and Saturation'" controls) to generate its own harmonics and possibly create an unpleasant,
harsh sounding distortion. To attain maximum power reserve for clean sounds, the post gain control may be
rotated fully clockwise to 10. (For further setting recommendations see the tone setting charts.)
Saturation ™ Control
The Saturation'" control determines the amount of overload and can be varied from soft distortion sounds
(settings of 0 to 5) to hard rock tonalities (settings of 5 to 10). Please remember to avoid setting the post gain
control higher than 5 when using the Saturation ™ circuit to create distortion sounds (see post gain control
above).
Pre Gain/Pull Bright Control
The pre gain control is the first volume control of the system and. like the post gain control, also serves a
dual purpose. If the post gain control is set to its full 10 position for clean tonalities, the pre gain control should
be positioned somewhere in the middle of its range or lower. Placing the pre gain control higher than 5 may
cause unwanted "square waves” (distortion) and result in premature "clipping" in the power amp. If distortion is
desired, however, both the pre gain and post gain controls should be placed near their 12 o’clock or #5 positions
and the amount of distortion should then be adjusted with the Saturation'" control.
The pre gain control also employs a Pull Bright switch which adds approximately 8 dB of boost to the high
end. As with the high EQ control, use care with the Pull Bright switch when using a distortion sound as too
much treble may cause a harsh sound at the power amp/speaker of the Studio Pro'" 40-
INPUTS
The Studio Pro'" 40 has two inputs labeled 1 and 2. Input 1 is the input which should normally be used and
will deliver the highest signal level from the instrument to the amp. Sometimes, however, guitars that ar
equipped with very high output "hot" pickups will overload the high gain input. This will be apparent becau
you will hear some unwanted distortion at the loudspeaker. If this distorted sound does occur, piug yourguitai
into the #2 input, which has less gam (minus 6 dB) than input 1. When two instruments are piugged into both
inputs, the #2 input is automatically switched to the same level as input #1. NOTE: WHEN USING TWO
INSTRUMENTS OR SIGNAL SOURCES WE STRONGLY RECOMMEND THAT THE VOLUME CONTROLS
BE SET AT A REASONABLY LOW VOLUME LEVEL TO REDUCE THE POSSIBILITY OF UNDUE
DISTORTION AND/OR SPEAKER DAMAGE,