Peavey JSX User Manual

JSX

™

Joe Satriani Signature All-Tube Amplifier

For more information on other great Peavey products, visit your local Peavey dealer or go online at www.peavey.com

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Intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Intended to alert the user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the product.

CAUTION: Risk of electrical shock — DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside.

Refer servicing to qualified service personnel.

WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture.
Before using this appliance, read the operating guide for further warnings.

Este símbolo tiene el propósito, de alertar al usuario de la presencia de “(voltaje) peligroso” sin
aislamiento dentro de la caja del producto y que puede tener una magnitud suficiente como para
constituir riesgo de descarga eléctrica.

Este símbolo tiene el propósito de alertar al usario de la presencia de Instrucciones importantes sobre la
operación y mantenimiento en la información que viene con el producto.

PRECAUCION: Riesgo de descarga eléctrica ¡NO ABRIR!
PRECAUCION: Para disminuír el riesgo de descarga eléctrica, no abra la cubierta. No hay piezas útiles

dentro. Deje todo mantenimiento en manos del personal técnico cualificado.

ADVERTENCIA: Para evitar descargas eléctricas o peligro de incendio, no deje expuesto a la lluvia o
humedad este aparato Antes de usar este aparato, Iea más advertencias en la guía de operación.

Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur la présence d’une tension dangereuse
pouvant être d’amplitude suffisante pour constituer un risque de choc électrique.

Ce symbole est utilisé dans ce manuel pour indiquer à l’utilisateur qu’il ou qu’elle trouvera d’importantes
instructions concernant l’utilisation et l’entretien de l’appareil dans le paragraphe signalé.

ATTENTION: Risques de choc électrique — NE PAS OUVRIR!
ATTENTION: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve

à l’intérieur aucune pièce pouvant être reparée par l’utilisateur. Confiez I’entretien et la réparation de
l’appareil à un réparateur Peavey agréé.

AVERTISSEMENT: Afin de prévenir les risques de décharge électrique ou de feu, n’exposez pas cet
appareil à la pluie ou à l’humidité. Avant d’utiliser cet appareil, lisez attentivement les avertissements
supplémentaires de ce manuel.

Dieses Symbol soll den Anwender vor unisolierten gefährlichen Spannungen innerhalb des Gehäuses
warnen, die von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.

Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam
machen, die Handhabung und Wartung des Produkts betreffen.

VORSICHT: Risiko — Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen.

Es befinden sich keine Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von
qualifiziertem Fachpersonal durchführen lassen.

ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses Gerät nicht dem
Regen oder Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.

2

IMPORTANT SAFETY INSTRUCTIONS

WARNING: When using electrical products, basic cautions should always be followed, including the following:

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 a dry cloth.

7. Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including
amplifiers) 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 plug. The wide blade or
third prong is provided for your safety. If the provided plug does not fit 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 they exit from the apparatus.

11. Note for UK only: If the colors of the wires in the mains lead of this unit do not correspond with the terminals in your
plug‚ proceed as follows:

a) The wire that is colored green and yellow must be connected to the terminal that is marked by the letter E‚ the

earth symbol‚ colored green or colored green and yellow.

b) The wire that is colored blue must be connected to the terminal that is marked with the letter N or the color black.
c) The wire that is colored brown must be connected to the terminal that is marked with the letter L or the color red.

12. Only use attachments/accessories provided by the manufacturer.

13. Use only with a cart, stand, tripod, bracket, or table specified 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.

14. Unplug this apparatus during lightning storms or when unused for long periods of time.

15. Refer all servicing to qualified 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.

16. Never break off the ground pin. Write for our free booklet “Shock Hazard and Grounding.” Connect only to a power
supply of the type marked on the unit adjacent to the power supply cord.

17. If this product is to be mounted in an equipment rack, rear support should be provided.

18. Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in
susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently
intense noise for a sufficient time. The U.S. Government’s Occupational and Health Administration (OSHA) has
specified the following permissible noise level exposures:

Duration Per Day In Hours Sound Level dBA, Slow Response

8 90
6 92
4 95
3 97
2 100
1 1/2 102
1 105

According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear plugs or protectors to
the ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss, if
exposure is in excess of the limits as set forth above. To ensure against potentially dangerous exposure to high sound pressure levels, it is
recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be
protected by hearing protectors while this unit is in operation.

1

/2 110

1

/4 or less 115

SAVE THESE INSTRUCTIONS!

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ENGLISH

™

Congratulations on purchasing a Peavey JSX guitar amplifier. The
JSX is a guitar player’s dream come true, an amp that delivers
superior sound quality and high performance for any style of
guitar playing. Only the finest materials are used to create this
great-sounding, rugged, tour-worthy and very unique-looking tone
machine. I hope you like this amp as much as I do!

Joe Satriani

Features

• Three 12AX7 preamp tubes

• Four EL34 power amp tubes driven by a 12AX7

• Power amp convertible to use four 6L6GC tubes

• Footswitchable effects loop with independent send and return controls

• Resonance and presence damping controls

• Fully adjustable noise gate circuitry on Ultra and Crunch channels

• Line out with level control

• Cabinet impedance switch (4, 8 or 16 Ohms)

• Heavy duty power, standby and channel select toggle switches

• Classic power status indicator lamp

• Chrome-plated brass control knobs

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F RO N T PA N E L

4

1

3 5 7 9

6 8 10

11

13

12

14

152

16 10

17

20

18

19

(1) POWER SWITCH

This two-way toggle switch applies mains power to the unit. The red POWER STATUS LAMP (3) will
illuminate when this switch is in the ON position.

(2) STANDBY SWITCH

This two-way toggle switch allows the amp to be placed in STANDBY mode. In the STANDBY position
the tubes stay hot but the amplifier is not operational. Switching to the ON position places the amp in
active mode.

(3) POWER STATUS LAMP

This indicator illuminates when mains power is being supplied to the amp.

(4) PRESENCE

Used to fine-tune the high frequency range of the speaker enclosure by varying the damping factor of
the amplifier at high frequencies.

(5) RESONANCE

Used to fine-tune the low frequency range of the speaker enclosure by varying the damping factor of
the amplifier at low frequencies.

(6) MASTER VOLUME

This control sets the overall volume level of the amp. Once the desired balance between the three
channels in the amplifier has been achieved, the entire output level of the unit can be increased or
decreased by rotating this control. Clockwise rotation increases level; counterclockwise rotation
decreases level.

(7) TREBLE

This control, on both the Ultra and Crunch channels, varies the high frequency response of the
amplifier. It is an active control (shelving type) and allows ˜12 dB of boost or cut.

(8) MID

This control, on both the Ultra and Crunch channels, varies the mid frequency response of the amplifier.
It is an active control (peak/notch type) and allows ˜12 dB of boost or cut.

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(9) BASS

This control, on both the Ultra and Crunch channels, varies the low frequency response of the
amplifier. It is an active control (shelving type) and allows ˜12 dB of boost or cut.

(10) VOLUME

This control, on all three channels, sets the overall level of its respective channel.

(11) GAIN

This control, on both the Ultra and Crunch channels, controls the input volume level of the channel.
Rotating this control clockwise will increase the amount of preamp distortion and sustain.

(12) CHANNEL ACTIVATION LEDs

These indicators signify which channel is active. Ultra channel activation illuminates the red LED;
Crunch channel activation illuminates the yellow LED; and Clean channel activation illuminates the
green LED.

(13) FAT SWITCH

These two-position toggle switches on the Ultra and Crunch channels modify the low frequency
responce of the amplifier and have the most noticeable effect when the guitar is "cleaned up," i.e.
with the guitar's volume control turned down. This control affects the tightness of the attack of the
notes; the attack is sloppier when the switch is in the "FAT" position.

(14) NOISE GATE

This control is shared by the Ultra and Crunch channels and adjusts the effectiveness of the noise
gate circuitry. Noise is reduced more as the control is turned clockwise. Avoid using high settings of
the noise gate when using lower gain settings, since at these settings the decay of the note will be
adversely affected.

(15) TREBLE

This passive control regulates the high frequencies for the Clean channel.

(16) MID

This passive control regulates the mid frequencies for the Clean channel.

(17) BASS

This passive control regulates the low frequencies for the Clean channel.

(18) HIGH GAIN INPUT

Used for most electronic guitars. It is 6 dB louder than the Low Gain input.

(19) LOW GAIN INPUT

Provided for instruments that have etremely high outputs that tend to overdrive (distort) the High Gain
input. If both inputs are used simultaneously, the output levels are the same (both are Low Gain).

(20) CHANNEL SELECT SWITCH

This three-position toggle switch allows selection between the amplifier’s three channels. LED (12)
illumination indicates which channel is active. Channel switching can also be accomplished by
footswitch. See the FOOTSWITCH section of this manual for explanation of switch operation. The
CHANNEL SELECT SWITCH must be set in the Ultra position in order for the footswitch to operate
properly.

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R EA R PA N E L

31

21

22

24 26

25

(21) EFFECTS SEND LEVEL

This calibrated (0 – 10) control sets the level of signal being sent to external effects and/or signal
processors. Clockwise rotation increases the amount of signal being sent; counterclockwise rotation
decreases the amount. For the quietest operation, the EFFECTS SEND LEVEL should be set as high as
possible. Generally, the SEND and RETURN levels should be set oppositely. If the EFFECTS SEND LEVEL
is set low, the EFFECTS RETURN LEVEL (24) is set high to achieve unity gain. If volume boost is desired,
turn both controls to higher settings.

(22/23) EFFECTS SEND/EFFECTS RETURN

These 1/4" mono (TS) jacks allow signal to be sent to and returned from external effects and/or signal
processors. Using shielded cables with 1/4" mono (TS) phone plugs, patch from EFFECTS SEND to
the input of the external device and from the output of the external device to EFFECTS RETURN. Only
devices that do not increase signal gain should be used in this effects loop (chorus, delay, reverb, etc.).
If the footswitch is used, the EFFECTS SELECTOR (37) switch must be depressed to activate the effects
loop. See the FOOTSWITCH section of this manual for explanation of switch operation.

27

28 30

2923

32

33

(24) EFFECTS RETURN LEVEL

This calibrated (0 – 10) control sets the level of signal being returned from external effects and/or
signal processors. Clockwise rotation increases the amount of signal being returned; counterclockwise
rotation decreases the amount. Again, SEND and RETURN levels should be set oppositely, with the
SEND level being high and the RETURN level low to ensure the quietest operation.

(25) REMOTE SWITCH

This seven-pin DIN connector is provided for the connection of the remote footswitch. The footswitch
cable should be connected before the amp is powered up. See the FOOTSWITCH section of this manual
for an explanation of switch operation.

(26) BIAS TEST TERMINALS

These terminals are provided to measure the bias of the amplifier’s power tubes. A knob behind the
back panel grill allows for adjustment. Bias adjustment should only be done by a qualified technician.

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(27) CABINET IMPEDANCE SWITCH

This three-position switch allows appropriate selection of speaker cabinet impedance. If two
enclosures of equal impedance are used, the switch should be set to half the individual value. For
example, two 16 Ohm enclosures necessitate an 8 Ohm setting, while two 8 Ohm enclosures would
require a 4 Ohm setting. Minimum speaker impedance is 4 Ohms.

(28) SPEAKER OUTPUTS

These paralleled 1/4" mono (TS) jacks are provided for the connection of speaker enclosure(s). Again,
minimum speaker impedance is 4 Ohms. The CABINET IMPEDANCE SWITCH (27) should be set to
match the load of the speaker cabinet(s).

(29) LINE OUT LEVEL

This control sets the level of signal being sent out of the LINE OUT (30) jack. It may be used to balance
the level of slave power amp/speaker systems driven from the LINE OUT (30) to the level of cabinets
driven from the SPEAKER OUTPUTS (28).

(30) LINE OUT

This 1/4" mono (TS) jack provides a post-power amp signal to drive another power amp/speaker
system while maintaining the amplifier’s tone.

(31) FUSE

A fuse is located within the cap of the fuse holder. This fuse must be replaced with one of the same
type and value to avoid damaging the amplifier and voiding the warranty. If the amp repeatedly blows
the fuse, it should be taken to a qualified service center for repair.

WARNING: THE FUSE SHOULD ONLY BE REPLACED AFTER THE POWER CORD HAS BEEN
DISCONNECTED.

(32) GROUND POLARITY SWITCH

This three-position, rocker-type switch should normally be placed in the center (0) position. If hum
or noise is noticed coming from the speaker enclosure(s), the switch may be placed in the “+” or “-”
position to minimize hum/noise. If changing the polarity does not alleviate the problem, consult your
authorized Peavey dealer, the Peavey factory or a qualified service technician.

(33) IEC MAINS CONNECTOR

This is a standard IEC power connector. An AC mains cord having the appropriate AC plug and ratings
for the intended operating voltage is included in the carton. The mains cord should be connected to
the amplifier before connecting to a suitable AC outlet.

U.S DOMESTIC AC MAINS CORD

The mains cord supplied with the unit is a heavy duty, three-conductor type with a conventional 120
VAC plug with ground pin. If the outlet used does not have a ground pin, a suitable grounding adapter
should be used and the third wire should be properly grounded.

Never break off the ground pin on any equipment. It is provided for your safety.

NOTE FOR UK ONLY:
If the colors of the wires in the mains lead of this unit do not correspond with the colored markings identifying
the terminals in your plug, proceed as follows: (1) The wire that is colored green and yellow must be connected
to the terminal that is marked by the letter E, the earth symbol or colored green or green and yellow; (2) The
wire that is colored blue must be connected to the terminal that is marked with the letter N or the color black;
(3) The wire that is colored brown must be connected to the terminal that is marked with the letter L or the
color red.

8

F O OT S W IT CH

34

35

(34) CABLE CONNECTOR

This seven-pin DIN connector is provided for connecting the footswitch to the amplifier REMOTE
SWITCH (25) via the cable included in the carton. Connections at the switch and the amplifier should
be made before the amp is powered up.

(35) ULTRA/CRUNCH SELECTOR

This switch selects between the Ultra and Crunch channels on the amplifier. The adjacent LED will
illuminate when the Ultra channel is selected. When the LED is dark, the Crunch channel is selected.
The CLEAN SELECTOR (36) must be in the BYPASS mode to activate either the Ultra or Crunch channel.

(36) CLEAN SELECTOR

This switch selects the Clean channel and will activate regardless of the position of the ULTRA/CRUNCH
SELECTOR (35). The adjacent LED will illuminate when the Clean channel is selected. This switch must
be in the BYPASS position, indicated by a dark LED, in order to utilize the ULTRA/CRUNCH SELECTOR
(35).

36

37

(37) EFFECTS SELECTOR

This switch activates the amplifier’s effects loop (21 – 24). The adjacent LED will illuminate when the
effects loop is active.

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JSX Block Diagram

™

10

™

JSX

SPECIFICATIONS

POWER AMPLIFIER SECTION:

Tubes:

Four EL34 tubes with 12AX7 driver

Rated Power & Load:

120 Watts RMS into 16, 8 or 4 Ohms

Power @ Clipping:

(typically @ 5% THD, 1 kHz, 120 VAC line)
120 Watts RMS into 16, 8 or 4 Ohms

Frequency Response:

+/-3 dB, 50 Hz to 20 kHz @ 90 Watts RMS
into 8 Ohms

Hum & Noise:

Greater than 76 dB below rated power

Power Consumption:

Domestic: 400 Watts, 50/60 Hz, 120 V AC
Export: 400 Watts, 60 Hz, 220-230/240 V AC

PREAMP SECTION:

Tubes:

Three 12AX7 tubes

The following specs are measured @ 1 kHz
with the controls preset as follows:

All EQ controls @ 5
Ultra & Crunch Volumes @ 10
Master Volume @ 5
Resonance and Presence controls @ 5
Effects Send @ 0
Effects Return @ 10
Nominal levels are with Gain @ 5
Minimum levels are with Gain @ 10
All levels increased by 6 dB if using
Low Gain input

Clean Channel:

Nominal Input Level: -10 dBV, 300 mV RMS
Minimum Input Level: -22 dBV, 80 mV RMS
Maximum Input Level: 0 dBV, 1 .0 mV RMS

Crunch Channel:

Nominal Input Level: -60 dBV, 1 mV RMS
Minimum Input Level: -90 dBV, 0.03 mV RMS

Ultra Channel:

Nominal Input Level: -70 dBV, 0.3 mV RMS
Minimum Input Level: -90 dBV, 0.03 mV RMS

Effects Send:

Load Impedance: 47 k Ohms or greater
Minimum Output:

-10 dBV, 300 mV RMS
Maximum Output:
0 dBV, 1 V RMS

Effects Return:

Impedance: High Z, 80 k Ohms
Minimum Input Sensitivity:

-10 dBV, 300 mV RMS
Maximum Input Sensitivity:
0 dBV, 1 V RMS

Line Output:

Load Impedance: 47 k Ohms or greater
Adjustable Output:
+/- 20 dBV, 0.1V RMS-10 V RMS

Remote Footswitch:

Special three-button metal footswitch
with LED indicators and detachable cord
(supplied) selects between three channels
and bypasses effects loop

System Hum & Noise @ Nominal Level:

(Clean channel - 20 Hz to 20 kHz unweighted)
Greater than 74 dB below rated power
(Adjustable noise gate circuitry for Ultra & Crunch)

Equalization:

Custom bass, mid & treble passive-type EQ
on Clean channel
Separate active +/-12 dB bass, mid & treble
EQs on Ultra & Crunch channels
Fat switches on Ultra & Crunch modifies low
frequency response
Resonance and presence damping EQ
controls in power amp

Dimensions & Weight:

11" (279 mm) H x 26.5" (673 mm) W x
11" (279 mm) D
52 lbs.(23.6 kG)

Note: For proper ventilation‚
allow 24" clearance from
nearest combustible surface.

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