Schertler Yellow Blender User manual

YELLOW BLENDER
Class-A preamplier
for acoustic instruments and not only...

IMPORTANT SAFETY INSTRUCTIONS
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF
UNINSULATED “DANGEROUS VOLTAGE” WITHIN THE PRODUCT ENCLOSURE THAT MAY BE OF A SUFFICIENT MAGNITUDE TO CONSITUTE A RISK OF
ELECTRIC SHOCK TO PERSONS.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND
MAINTENANCE INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE PRODUCT.
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK
DO NOT EXPOSE THE APPLIANCE TO RAIN OR HUMIDITY
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (inclu-
ding ampliers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two bla-
des with one wider than the other. A grounding type plug has two blades and a third grounding prong. The
wide blade or the third prong are provided for your safety. If the provided plug does not t into your outlet,
consult an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched particularly at plugs, convenience recepta-
cles, and the point where they exit from the apparatus.
11) Only use attachments/accessories specied by the manufacturer.
12) Use only with the cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury
from tip-over.
13) Unplug this apparatus during lightning storms or when unused for long periods of time.
14) Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate nor-
mally, or has been dropped.

WARNINGS
PRECAUTIONS
WARNINGS Please read this manual carefully before using your
YELLOW pre-amplier and observe all safety precautions
Keep this manual for future reference
Do not pour any liquids onto this device, or operate it in excessively humid conditions.
Do not use or install this device near sources of excessive heat. Do not expose it to direct sunlight, or position it in a
dusty environment without any form of protection.
Ensure that the mains voltage does not exceed the value indicated on the back panel.
Do not use this device if either the mains cable or its plug is not in perfect condition. (Replace if necessary.)
If the mains cable needs replacing, it must be done by an appropriately qualied person. The replacement cable must
be exactly the same as the original.
To avoid interference, do not use this device near power transformers, TVs, RF transmitters, electric motors or any
other source of electrical energy.
Do not point a microphone towards any speakers as this could result in feedback (Larsen effect) and ultimate damage
to your device.
Only use the original connection cables – if supplied with the device. Otherwise this could prove both costly and
inconvenient.
To completely disconnect this device from the AC mains, remove the power cable plug from the mains socket.
When cleaning, do not use solvents (e.g acetone or alcohol). These could damage the external nish and the serigraphy.
Do not attempt to service this device. If any malfunction is detected, call the nearest technical assistance centre, or a
specialist technical centre.
To maintain good ventilation, never cover or obstruct the heat sink with blankets, sofas or any other furnishings.
Always leave sufcient clearance between the heat sink and any other surface.
No ammable sources, i.e. candles, should be placed on or near the device.
This device should never be exposed to water, even in small amounts. No object containing liquids should be placed
on or near the device.
This device should only be connected to a mains socket outlet that has a protective ground.
When using or installing this device, always make sure that the mains socket and the mains cable plug are easily
accessible.

INTRODUCTION
YELLOW has been developed with the purpose of improving design and performances of the
previous Pre-A series preampliers and offering to the musician all that can be necessary for his
needs.
Yellow offers:
- modern and sophisticated design, build in a robust and light aluminum.
- maximum three input channels for all kind of microphones and pick-ups
- maximum four output lines with multiple connections
- headphones output
- send&return for effect loop
- four band eq for the two main channels to ensure wide range of tonal controls
- hi-end pure class A electronics for the best possible sound performance
Every single section has been thought and engineered to ensure the maximum potential from
any kind of sound source.
PRACTICAL ADVICE
When you are using an amplied speaker, one of the most important recommendations is to
avoid at all costs a distorted input signal.
In other words, when you are controlling the sound in your amplier’s mixer section (or any sother
preamplier), you must avoid reaching saturation level.
While playing your instrment or singing in the microphone, start turning up the Gain knob until the
Overload LED begins to blink. At this point, turn the Gain knob back down slightly. This correctly
sets the preamp level depending on your actual input signal. Now set the Master volume between
30% and 60%. With the Gain and Master levels appropriately set, you can now set the channel
volume as you please.
In the case of amplied speakers, the arrival of a distorted signal (square wave) may damage the
internal amplier beyond repair, which may in turn damage the loudspeakers.
Correct use of speakers guarantees their long life.

INPUTs PANEL
1. MIC-IN: enables the connection of a condenser microphone or a dynamic microphone (if necessary,
press the PHANT button to power the microphone).
2. LINE-IN: enables the connection of guitars equipped with SCHERTLER LYDIA or STAT-Series systems,
electric guitars and bass guitars (if necessary, press the 10V button to power the microphone).
3. SEND: enables you to send your signal to an external device. Adjust output volume using the SEND-
VOL potentiometers on both channels.
4. RETURN: enables the conncetion of any external audio control effect. Use the RETURN potentiometer
to adgust the volume of the return channel.
5. PHONES: enables the connection of your headphones with a 3.5mm mini-jack connector.
3. 2.
4. 1.
5.
6.
7.
8.
9.
10.
OUTPUTs PANEL
6. MASTER-OUT UNBALANCED: signal can be sent to an active loudspeaker or/and to another device.
The output volume depends on both the potentiometer VOLUME and MASTER-VOL: use the last one to
adjust only the volume to be sent to the speakers and leave the other settings unchanged.
7. MASTER-OUT BALANCED: signal can be sent to an active loudspeaker or/and to another device. The
output volume depends on both the VOLUME and MASTER-VOL potentiometer: use the last one to adjust
only the volume to be sent to the speakers and leave the other settings unchanged.
8. DI-OUT: signal can be sent to external systems, for example to another mixer. If you wish to record your
music, connect your recorder to the same output and start recording.
9. DC 24V: Power supply plug-in connector.
10.Power supply LED: indicate when the preamp is ON

FRONT PANEL
-20dB MODE
-12dB -12dB
||
SEND 2 (PRE)SEND 1 (PRE)
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.2.1
2.2.2
2.2.3
2.3
3.1.1
3.1.2
3.1.3
3.1.4
3.2.1
3.2.2
3.2.3
3.2.4
3.3
4.1.1 4.1.2

CONTROLS - CHANNEL 1, MIC
POTENTIOMETERS:
2.1.1. GAIN
This variable gain preamplier adjusts the sensitivity
level to ensure the best possible processing of the
signal through the channel. It is important that this
input level is set and optimised in the best way to
achieve the cleanest sound possible.
2.1.2. RESON
The Resonance (notch) lter cuts the frequency of
150Hz / 220Hz, to reduce low-frequency feedback.
- Left: no attenuation (at)
- Right: maximum attenuation
Use the reson switch to select the resonant
frequency of the instrument (150Hz / 220Hz).
2.1.3. HIGH, HIGH MID, LOW MID, LOW
These controls are dedicated for high, mid and low
frequency regulation. Offering cut and boost of +/-
15dB, they allow a wide range of tonal variations
to be explored. When the controls are positioned
centrally there is no cut or boost of the selected
frequency band.
2.1.4. SEND 1
This rotary control sets the output level on the
SEND OUT.
2.1.5. VOLUME
This rotary control regulates the channel volume. It
effects: SEND 1, DI-OUT, MASTER-OUT, PHONES.
SWITCHES:
2.2.1. ø (PHASE)
In case of feedback, or unwished effects between
different channels use the phase reverse switch!
2.2.2. PHANT (24V)
Phantom power supplies the XLR connector with
24V for powering condenser microphones.
2.2.3. -12dB (PAD)
If the input signal from jack input is too powerful and
you have overloads, use the PAD switch to have
12dB reduction.
LEDS:
2.3. OVERLOAD
This LED (when lit) indicates that the level of
the input signal is too high so it might introduce
distortions.
CONTROLS - CHANNEL 2, INSTRUMENT
POTENTIOMETERS:
3.1.1. GAIN
This variable gain preamplier adjusts the sensitivity
level to ensure the best possible processing of the
signal through the channel. It is important that this
input level is set and optimised in the best way to
achieve the cleanest sound possible.
3.1.2. . HIGH, HIGH MID, LOW MID, LOW
These controls are dedicated for high, mid and low
frequency regulation. Offering cut and boost of +/-
15dB, they allow a wide range of tonal variations
to be explored. When the controls are positioned
centrally there is no cut or boost of the selected
frequency band.
3.1.3. SEND 2
This rotary control sets the output level on the
SEND OUT.
3.1.4. VOLUME
This rotary control regulates the channel volume. It
effects: SEND 2, DI-OUT, MASTER-OUT, PHONES.
SWITCHES:
3.2.1. WARM
When engaged, this low-pass lter damps higher
frequencies to produce a warmer sound when using
bridge-mounted pickups such as Schertler STAT
series transducers for violin, cello and double bass.
3.2.2. 10V
Phantom power supplies the jack connector
with 10V for powering electret microphones and
Schertler Stat, Basik and Lydia series.
3.2.3. -12dB (PAD)
If the input signal from jack input is too powerful and
you have overloads, use the PAD switch to have
12dB reduction.
3.2.4. LOW CUT
The low cut switch cuts the frequencies below
120Hz.
LEDS:
3.3. OVERLOAD
This LED (when lit) indicates that the level of
the input signal is too high so it might introduce
distortions.

CONTROLS - MASTER
MASTER SECTION:
4.1.1. MASTER-VOLUME
This rotary control regulates the master volume, on
which depend: MASTER-OUT, PHONES.
4.1.2. RETURN LINE-IN
This rotary control sets the input level on the
RETURN input channel.
SIGNAL FLOW
+10V
PAD
-15dB
JACK-MONO
INPUT
JACK-STEREO
SEND
OUTPUT
MINI JACK
PHONES
OUTPUT
XLR
MASTER
OUT
JACK MONO
MASTER
OUTPUT
RETURN CH3
JACK-STEREO
INPUT
VOLUME
MASTER
XLR D.I.
OUTPUT
GAIN
O.L.
+
VOL CH3
VOL
SEND2
+
ON / OFF ON / OFF
LOW CUT
FILTER
WARM
PAD
-15dB
PHANTOM
POWER
XLR
INPUT
GAIN
EQ
150 / 220 Hz
O.L.
VOL CH1
RESONPHASE
EQ
VOL CH2
VOL
SEND1

TECHNICAL SPECS
Construction ................................................
Weight .........................................................
Dimensions .................................................
INPUTS
MIC IN
Connector ...................................................
Sensitivity ....................................................
Impedance ..................................................
STAT IN
Connector ...................................................
Sensitivity ....................................................
Impedance ..................................................
RETURN
Connector ...................................................
Sensitivity ....................................................
Impedance ..................................................
EQUALIZER
Low (shelving) ..............................................
Low-mid (peaking) .......................................
High-mid (peaking).......................................
High (shelving) .............................................
FILTER
Reson (notch lter) ......................................
Warm ...........................................................
Low cut ........................................................
OUTPUTS
SEND
Connector ....................................................
Level ............................................................
Impedance ..................................................
D.I. OUT
Connector ...................................................
Level ...........................................................
Impedance ..................................................
MASTER OUT
Connector ...................................................
Level ...........................................................
Connector ...................................................
Level ...........................................................
Impedance ..................................................
PHONES
Connector ...................................................
Level ...........................................................
Impedance ..................................................
Anodized aluminum box
0.4 kg
200x 108 x 38 mm
XLR balanced
-56 dB
4.7 kohm
Jack 6.3mm. unbalanced
-52 dB
3 kohm / 300 kohm
Jack 6.3mm. stereo
-30 dB
22 kohm
+15 / -23dB (@60 Hz)
+12 / -12dB (@300Hz)
+12 / -12dB (@1.3 kHz)
+23 / -23 dB (@12 kHz)
-20 dB @150 Hz or 220 Hz
1st order Low Pass lter (2kHz cut freq.)
2nd order Hig Pass lter (120Hz cut freq.)
Jack 6.3mm. unbalanced
+5dBu
100ohm
XLR balanced
0dBu
100ohm
XLR balanced
+20dBu
Jack 6.3mm. unbalanced
+14dBu
100ohm
Jack 3.5mm.
+10dBu
10ohm

NOTES

NOTES

ALL SCHERTLER® PRODUCTS ARE COVERED BY A LIMITED THREE-YEAR WARRANTY (FROM
THE DATE OF PURCHASE) AGAINST MANUFACTURES DEFECTS. DETAILS CAN BE OBTAINED
FROM YOUR LOCAL DEALER/REPRESENTATIVE. SCHERTLER SA STRONGLY BELIEVES IN
“COMMON SENSE” AND THUS, MISUSE OF OUR PRODUCTS ARE NOT COVERED UNDER
RIGHTS OBTAINED THROUGH OUR WARRANTY POLICY OR THAT OF INTERNATIONALLY
RECOGNIZED TERMS AND CONDITIONS.
SCHERTLER SA IS CONSTANTLY AIMING TO IMPROVE ITS RANGE OF PRODUCTS THEREFORE,
SCHERTLER SA RESERVES THE RIGHT TO AMEND PRODUCT
SPECIFICATIONS WITHOUT NOTICE.
THE SCHERTLER® NAME/LOGO ARE REGISTERED TRADE-NAMES/ TRADEMARKS OF
SCHERTLER SA, SWITZERLAND.
All SCHERTLER® PRODUCTS ARE OF PROPRIETARY TECHNOLOGY AND COVERED BY ONE
OF MORE WORLDWIDE PATENTS.