Rolls FX953 Handleiding
Rolls
Niet gecategoriseerd
FX953
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Connection guide
Rolls Corporation
Salt Lake City, UT
10/23
What's in the box?
1 - Made in USA FX953
1 - 15V power supply PN PS27s
1 - This owners manual
FX953 Bad Bass Preamp
Introducing the FX953 “Bad Bass Preamp” pedal – a versatile preamplier pedal designed to repli-
cate the eects of intentionally over or under biasing a preamp to achieve specic desired sonic
results. Our extensive experience in biasing ampliers and preamps over the years has revealed
that deviating from the correct biasing circuit can yield striking changes in sound quality.
The FX953 empowers musicians to explore this creative avenue by providing a safe and con-
trolled means to manipulate bias settings without risking damage or unwanted voltage surges
to their equipment. While initially tailored for bass guitar applications, the FX953 is compatible
with any guitar, making it a valuable tool for shaping your unique sound.
SPECIFICATIONS
Connectors: Inputs: 1/4”
Outputs: Mono - XLR balanced, 1/4”
Max Output Level: +10 dBV
Max Gain: 43 dBv
Phase Shift: 0 deg. 20 Hz - 20 kHz
THD: < Well a lot..... 1000%
Switch: Active switch with true bypass.
Power: 15 VDC adapter or 9V battery
Weight: 1.8 lbs
Size: 6.75” x 4” x1.4”
The primary function of this pedal is to intentionally manipulate a circuit by either over-biasing
or under-biasing it, thereby achieving a desired eect. This manipulation often results in a
signicant and potentially dramatic impact on both the sound level and distortion. In most in-
stances, this eect is favorable, enhancing the overall sound. However, in certain cases, the bias
manipulation can be so extreme that it causes the signal to shift to one extreme and become
nearly non-existent. This outcome is intentionally designed into the pedal to provide users with
the opportunity to explore the full spectrum of bias shift eects. It’s essential to be aware that
using this pedal can yield a wide range of outcomes, some highly favorable and others less so.
Be warned you can get some pretty dramatic out-
comes from using this pedal, some are good and
some are “Bad Bass Preamp”.
DC jack for connec-
tion to the included
Rolls PS27s power
supply
OUTPUT: 1/4” jack
for signal output.
Single 9V battery
VDC
+
-
FX953
BAD BASS PREAMP
OUT BIAS IN
LPF
IN
DIRECT
OUT
OUT
MADE IN USA
Designed by avid . iFrancescoD O D
1K
3K
500
MADE IN USA
www.rolls.com
1/4” jack for signal
input.
Mono XLR output: This is a
mono balanced output for
direct out.
The FX953 features custom-designed class A preampliers meticulously crafted to emulate the characteristics of tube
amplication when subjected to both under and over biasing within the circuit.
The LPF (Low Pass
Filter) is designed to
replicate the distinctive
tonal characteristics
of dierent bass guitar
cabinets.
The Input potentiometer
and Bias control function
collaboratively to man-
age the signal, adjusting
it to either underbias
or overbias conditions.
Through a blend of these
controls, you can am-
plify the initial signal or
potentially introduce such
extreme underbias or
overbias that it may result
in overload, causing the
circuit to disconnect due
to excessive DC. It’s
crucial to exercise caution
as using these controls in
combination can lead to
excessive distortion and
complete signal cuto.
Out: Sets the otput
level of the FX953.
This is not part of
the bias and is only
for level matching.
Active switch with true
bypass.
Product specificaties
| Merk: | Rolls |
| Categorie: | Niet gecategoriseerd |
| Model: | FX953 |
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