SChERtLER JAM USER MANUAL

JAM

combo amplier

for acoustic instruments

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.

TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK

WARNING

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

DO NOT EXPOSE THE APPLIANCE TO RAIN OR HUMIDITY

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 blades 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 receptacles, 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 normally, or has been dropped.

WARNINGS

PRECAUTIONS

WARNINGS

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.

Please read this manual carefully before using your

JAM amplier and observe all safety precautions

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

JAM becomes the third member of Schertler’s “next generation” acoustic amplication series. The new 5-channel “all-rounder” combines a comprehensive feature set with the updated technology and enhanced “look” that denes all the models in this latest range. Equipped with a 1” dome tweeter and 8” woofer, and featuring an optimized 2-way bass reex construction, JAM offers 200W (150W + 50W) of bi-amplied power. The amplier includes a balanced microphone (XLR) input, an unbalanced mic/instrument input and an input offering both balanced microphone and unbalanced mic/instrument options. Both instrument inputs feature a Bootstrap technology that enables the input to automatically adapt to any impedance. A separate stereo input channel will additionally accommodate devices such as a computers, MP3 or CD/DVD players. A 5th FX Return channel can also be used for inputting line level devices. The 3 main microphone/instrument input channels include a Gain control for input sensitivity regulation and 3-band EQ, with parametric mids on input channels 1 and 3 and a switchable resonance (notch) lter (240Hz/150Hz) on channel 2. Phantom power is supplied for condenser and electrostatic microphones. Each of these channels also features an overload LED. Channel 1 is additionally equipped with a phase reverse switch to prevent feedback, or unwanted effects between the various channels. JAM’s Master Section controls include a new adjustable DI Out, a new Mute button, a Line Out enabling the connection of external systems, a digital reverb and an Insert for connecting an external dynamics processor. Connection options are further enhanced with an Aux Out (Channel 1) that also enables connection to other systems. A Low Cut lter (cutting frequencies below 180Hz) can be used with instruments that generate aggressive low frequencies. This also enables a separate subwoofer to be connected without causing any damage to the amplier. JAM is additionally equipped with a high voltage CLASS-A preamp that has no integrated circuits and No Negative Feedback (NFB).

1. FRONT PANEL - INSTRUMENT IN

JAM CLASS-A high voltage preamp, no integrated circuits, no NFB

PARAMETRIC MIDS

LOW HIGH REV (AUX) VOLUME AUX

300Hz 3.3KHz

RESON

700Hz

GAIN

1.8 1.9

OUT

240Hz

150Hz

REVERB

DECAY MASTER

master

LINE OUT

INSERT

1.1

GAIN

1.4

OLIN

WARM

1.5

1.6 1.7

P24

10V

GAIN VOLUMELOW MID HIGH REV (AUX)

10V

1.31.2

FLAT

GAIN

P24

LOW

PARAMETRIC MIDS

700Hz

300Hz 3.3KHz

GAIN

HIGH REV (AUX)

VOLUME

STEREO

3 4

VOLUMELEFT RIGHT

FX RETURN

DI OUT

1.1. INSTRUMENT IN Unbalanced input for the connection of jacks (6.3mm or 1/4”), with optimal sensitivity for high level signals. The electronics will adapt to any situation. No special action is required.

1.2.PHASE In case of feedback, or unwanted effects between different channels use the phase reverse switch.

1.3. 10V Phantom power supplies the Jack connector with 10V for powering electret microphones.

1.4. GAIN This variable gain preamplier adjusts the sensitivity level to ensure the best possible processing of the INSTRUMENT IN signal through the channel. It is important that this input level should be set and optimised in the best way to achieve the cleanest sound possible.

1.5. OVERLOAD This LED (when lit) indicates that the level of the input signal is too high and it might introduce distortions

1.6. WARM When engaged, this low-pass lter damps higher frequencies to produce a warmer sound when using bridge-mounted pickups such as the SCHERTLER STAT-Series for violin, viola, cello and double bass..

1.7. HIGH, MID, LOW These controls are devoted to high, medium and low frequency regulation. Offering cut and boost of ±15dB, they allow a wide range of tonal variations to be explored. Parametrics MIDS regulation offers the possibility to cut or boost a frequency range between 300Hz and 3,3kHz. When the controls are positioned centrally there is no cut or boost of the selected frequency band.

1.8. REV/AUX This rotary control sets both the level of the digital reverb on the channel and the level of the signal to the AUX OUT output. If you want to bypass the on-board reverb, you can set the Reverb Master knob to zero and use the REV/AUX to control the amount of signal you want to send to an external effect unit or to an additional monitor.

1.9. VOLUME This rotatory control regulates the channel volume.

2. FRONT PANEL MIC or INSTRUMENT IN

JAM CLASS-A high voltage preamp, no integrated circuits, no NFB

GAIN

OLIN

WARM

10V

PARAMETRIC MIDS

LOW HIGH REV (AUX) VOLUME AUX

700Hz

GAIN

REVERB

DECAY MASTER

OUT

master

P24

2.3

GAIN

10V

GAIN VOLUMELOW MID HIGH REV (AUX)

LOW

2.1 2.2 2.4 2.5

P24

300Hz 3.3KHz

2.6

FLAT

PARAMETRIC MIDS

700Hz

300Hz 3.3KHz

240Hz

RESON

150Hz

2.7 2.8 2.9 2.10 2.11

GAIN

HIGH REV (AUX)

VOLUME

STEREO

3 4

LINE OUT

INSERT

VOLUMELEFT RIGHT

FX RETURN

DI OUT

2.1. MIC INPUT This input is electronically balanced for XLR type connections. The new MIC/DYN channel is now conceived for any kind of signal sources. You can plug in vocal microphones. The electronics will adapt to any situation. No special action is required.

2.2. INSTRUMENT IN Unbalanced input for the connection of jacks (6.3mm or 1/4”), with optimal sensitivity for high level signals, the electronics will adapt to any situation. No special action is required.

2.3. P24 The amplier’s XLR input provides 24V phantom power for use with a condenser microphone. Most condenser (and dynamic) microphones, along with some preamps, can be safely phantom powered. In certain cases however, phantom power can cause damage to a device. This tends to occur with unbalanced microphones, preamps or stompboxes that have been modied for balanced XLR use. For any doubt, please contact us to check the compatibility of your audio device before using the amplier

2.4. 10V Phantom power supplies the Jack connector with 10V for powering electret microphones.

2.5. GAIN This variable gain preamplier adjusts the sensitivity level to ensure the best possible processing of the MIC and the INSTRUMENT IN signal through the channel. It is important that this input level should be set and optimised in the best way to achieve the cleanest sound possible.

2.6. OVERLOAD This LED (when lit) indicates that the level of the inputsignal is too high AND it might introduce distortions

2.7. RESON The Resonance (notch) lter cuts the frequncy of 150Hz/240Hz, to reduce low-frequncy feedback. Left: no attenuation (at), Right: maximum attenuation. Use the reson switch to select the resonant frequency of the instrument (240Hz/150Hz)

2.8. RESON switch

2.9. HIGH, MID, LOW These controls are devoted to high, medium 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.

2.10. REVERB This rotary control sets both the level of the digital reverb on the channel and the level of the signal to the AUX OUT output. If you want to bypass the on-board reverb, you can set the Reverb Master knob to zero and use the REV/AUX to control the amount of signal to send to an external effect unit or to an additional monitor.

2.11. VOLUME This rotatory control regulates the channel volume

2.11. OVERLOAD This LED (when lit) indicates that the level of the inputsignal is too high so it might introduce distortions

3. FRONT PANEL MIC / 4. STEREO IN

JAM CLASS-A high voltage preamp, no integrated circuits, no NFB

GAIN

OLIN

WARM

10V

PARAMETRIC MIDS

LOW HIGH REV (AUX) VOLUME AUX

700Hz

GAIN

REVERB

DECAY MASTER

OUT

master

3.1

3.2

300Hz 3.3KHz

RESON

3.5

240Hz

150Hz

GAIN

HIGH REV (AUX)

3.6

VOLUME

3.7

P24

10V

GAIN

3.3

3.4

P24

GAIN VOLUMELOW MID HIGH REV (AUX)

FLAT

PARAMETRIC MIDS

LOW

700Hz

300Hz 3.3KHz

STEREO

4.1

3 4

LINE OUT

INSERT

VOLUMELEFT RIGHT

FX RETURN

DI OUT

3.1. MIC INPUT This input is electronically balanced for XLR type connections. The new MIC/DYN channel is now conceived for any kind of signal sources. You can plug in vocal microphones. The electronics will adapt to any situation. No special action is required.

3.2. P24 The amplier’s XLR input provides 24V phantom power for use with a condenser microphone. Most condenser (and dynamic) microphones, along with some preamps, can be safely phantom powered. In certain cases however, phantom power can cause damage to a device. This tends to occur with unbalanced microphones, preamps or stompboxes that have been modied for balanced XLR use. For any doubt, please contact us to check the compatibility of your audio device before using the amplier

3.3. GAIN This variable gain preamplier adjusts the sensitivity level to ensure the best possible processing of the MIC signal through the channel. It is important that this input level should be set and optimised in the best way to achieve the cleanest sound possible.

3.4. OVERLOAD This LED (when lit) indicates that the level of the inputsignal is too high and it might introduce distortions

3.5. HIGH, MID, LOW These controls are devoted to high, medium and low frequency regulation. Offering cut and boost of ±15dB, they allow a wide range of tonal variations to be explored. Parametrics MID regulation, offers the possibility to cut or boost a frequency range between 300Hz and 3,3kHz. When the controls are positioned centrally there is no cut or boost of the selected frequency band.

3.6. REVERB This rotary control sets both the level of the digital reverb on the channel and the level of the signal to the AUX OUT output. If you want to bypass the on-board reverb, you can set the Reverb Master knob to zero and use the REV/AUX to control the amount of signal to send to an external effect unit or to an additional monitor.

3.7. VOLUME This rotatory control regulates the channel volume

4.1. STEREO IN Mini Jack stereo 3.5mm input for PC, MP3 and several electronic devices. The volume depends on the MASTER-VOL regulation

5. FX RETURN 6. AUX OUT / MASTER SECTION

JAM CLASS-A high voltage preamp, no integrated circuits, no NFB

GAIN

OLIN

WARM

P24

10V

GAIN VOLUMELOW MID HIGH REV (AUX)

LOW

300Hz 3.3KHz

10V

P24

5.1. FX Return Left and Right unbalanced jack plug for FX Return

PARAMETRIC MIDS

LOW HIGH REV (AUX) VOLUME AUX

300Hz 3.3KHz

RESON

FLAT

PARAMETRIC MIDS

700Hz

240Hz

150Hz

GAIN

HIGH REV (AUX)

VOLUME

STEREO

6.11

3 4

REVERB

DECAY MASTER

6.8

INSERT

6.6

master

6.7

6.3

LINE OUT

VOLUMELEFT RIGHT

5.2

FX RETURN

6.5

6.4

6.9 6.10

6.2

DI OUT

6.1

OUT

5.1

5.2. FX Return volume This rotary control sets the output level on the FX Return

6.1. DI-OUT General output. XLR balanced type connector for connections of external systems. The output volume does not depend on the regulation of the MASTER-VOL but is effected by changes in individual channel volume.

6.2. DI-OUT vol This rotary control sets the output level on the DI-OUT

6.3. LOW CUT When engaged, this lter cuts all the frequencies below 180Hz. This function is ideal if you play an instrument that generates aggressively low frequencies, It enables you to connect a subwoofer and prevent unpleasant vibration and possible damage to your JAM.

6.4. MASTER Control overall system volume

6.5. LINE OUT This unbalanced jack plug enables the connection of external systems. The output volume depends on the regulation of the MASTER-VOL.

6.6. INSERT This stereo jack plug enables the connection of an external device (compressor, equalizer, etc.) in series to all the outputs

6.7. REVERB master This control regulates the general level of the digital reverb, common to all channels. The amount of the effect can be regulated individually for the single channel through the dedicated controls.

6.8.DECAY This control regulates the length of the reverb (time of the reverb from attack to silence).

6.9. MUTE Mute switch, cuts the audio on the master

6.10. Power LED This LED indicates when the amplier is switched ON

6.11 AUX OUT Additional output. This mono jack plug enables the connection to other systems.

4. REAR PANEL

JAM

TO REDUCE RISK OF FIRE, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. FOR CONTINUED ROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH THE SAME TYPE AND RATING OF FUSE.

RISK OF ELCTRIC SHOCK DO NOT OPEN!

GND LIFT

7.1

7.3

POWER IN

7.1. POWER ON/OFF System ON/OFF switch.

7.2

150-WATT ACOUSTIC AMPLIFIER

DESGNED IN SWITZERLAND MADE IN ITALY

POWER CONSUMPTION 105W

SERIAL NR.

www.schertler.com

7.2. GROUND LIFT This switch connects and disconnects the ground

7.3. MAIN POWER CONNECTION Connection to mains Fuse carrier 220 - 230 V 50 Hz / 60 Hz T 1.6 A L 250 V 240 V~ 50 Hz T 1.6 A L 250 V 120 V ~ 60 Hz T 3.15 A L 250 V 100 V~ 50 Hz / 60 Hz T 3.15 A L 250 V

PLEASE ENSURE THE PROPER VOLTAGE AND USE THE ORIGINAL CONNECTION CABLE

XLR

SIGNAL FLOW

XLR

JACK

Parametric MID

3B EQ

P24

PHANTOM

GAIN

10V

PHANTOM

reason

3B EQ

P24

PHANTOM

GAIN

10V

PHANTOM

reverse phase

GAIN

WARM

Parametric MID

3B EQ

JACK L

FX RETURN

JACK R

DI. OUT

AUX OUT

REVERB with

DECAY

STEREO IN

INSERT

MASTER

LOW CUT

LINE OUT

TO AMP

TECHNICAL SPECS

Frequency response ...................................

Sensitivity (1W-1m) .....................................

SPL max .....................................................

Woofer ........................................................

Horn ............................................................

Crossover ...................................................

Box ..............................................................

Construction ................................................

System – Format .........................................

Max Power out ............................................

Weight .........................................................

Dimensions .................................................

INPUTS

MIC IN

Connector ...................................................

Sensitivity ....................................................