Marshall Amplification JFX-1 Handbook

S E R

A N U A L

From Jim Marshall

I would like to thank you personally for selecting the

JFX-1 Digital Signal Processor.

As a result of the success of the internationally acclaimed JMP-1 stereo valve MIDI pre-amp our first digital product, my design team’s next step was to create a Digital Signal Processor in the same style to expand the guitarist’s range of usable sounds even further.

The same team who designed the JMP-1 devoted many hours of research and development to the creation of the JFX-1, the first Marshall Digital Signal Processor.

As with all products that bear the Marshall logo, no matter how technically advanced, you can be sure that the utmost care and highest possible standards of quality control have been employed in the manufacture of your JFX-1.

Though designed to be totally user friendly and extremely intuitive to operate, I strongly suggest that you read this manual carefully to fully understand and make the most of the JFX-1’s many features.

I wish you many happy hours exploring the vast range of sonic possibilities opened up by the processing power of your new JFX-1.

Yours Sincerely,

From Jim Marshall

Warning List and Introduction

Section 1 - Connection Diagrams

A. With a Home / Recording Mixer

B. Stereo Rack System

C. With a Stereo or Mono Combo / Amp

Section 2 - Quick Reference Guide

2.1 - Selecting a Stored Pre-Set

2.2 - Editing Pre-Set Programs

2.3 - Storing Altered Parameter Values

2.4 - Naming a Program

Section 3 - Front Panel

3.1 - The Rear Panel

Section 4 - The Mixer Section

4.1 - Setting the Output Levels

Section 5 - Chorus / Flange Mode

5.1 - Chorus / Flange Types

5.2 - Chorus Parameters

5.3 - Creating a Chorus / Flange Program

Section 6 - Multi-Tap Mode

6.1 - Multi Tap Parameters

6.2 - Creating a Multi-Tap Program

Section 7 - Delay Mode

7.1 - Delay Types

7.2 - Delay Parameters

7.3 - Creating a Delay Program

Section 8 - Reverb Mode

8.1 - Reverb Mode

8.2 - Reverb Characters

8.3 - Reverb Parameters

8.4 - Creating a Reverb Program

Section 9 - Multi Effect Mode

9.1 - Multi-Effect Individual Features

9.2 - Multi-Effect Parameters

9.3 - Creating a Multi-Effect Program

Section 10 - Naming a Program

Section 11 - Storing a Program

Section 12 - The System Menu

12.1 - The Remote Jack

12.2 - MIDI Operations and Functions

12.3 - MIDI Channel

12.4 - Input and Output Mapping

12.5 - MIDI Controllers

12.6 - MIDI Controller Parameters for each Mode

12.7 - System Exclusive Back-up

12.8 - Battery Level

Section 13 - Re-Initialising the JFX-1

Section 14 - Specifications

Section 15 - JFX-1 Factory Pre-Sets

Section 16 - MIDI Implementation Chart

Section 17 - Program Information Sheets

JFX-1 Handbook Contents :

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WARNING!

PLEASE READ THE FOLLOWING LIST CAREFULLY

A. DO NOT attempt to remove the JFX-1’s lid, There are no user serviceable parts inside. B. ALWAYS have this equipment serviced or repaired by competent, qualified personnel. C. NEVER use the JFX-1 in damp or wet conditions. D. ALWAYS use only the Marshall power supply that is provided with the JFX-1. E. PLEASE READ this instruction manual carefully before switching on.

Introduction

The Marshall JFX-1 is a totally programmable 24 bit digital effects processor which features the

highest quality effects algorithms and also allows complete control via MIDI.

By utilising a 64x over-sampling 16 bit Sigma/Delta Analogue to Digital converter in conjunction with 16 bit linear dual Digital to Analogue conversion, the JFX-1 produces effects that have superb resolution and depth, with an absolute minimum of distortion and maximum dynamic range.

Also by incorporating a high quality Voltage Control Amplifier the all important dry signal is kept free from degradation - essential for maintaining the integrity of your direct sound.

Although suitable for all processing applications the JFX-1 has been designed primarily as a guitar rack effects processor. The first 50 programs have been pre-set at the Marshall factory but may be edited in full. They can also be restored without loss of data custom programmed into memories 50 to 127. The individual algorithms for Chorus/Flange, Multi-Tap Delay, Delay, Reverb and Multi-Effect, give you the ability to edit and store a superb library of effects, with no unnecessary or redundant features to confuse the issue.

If you want to use the JFX-1 with an amp head or combo which has channel switching facilities the special Remote Jack can be programmed to activate the Channel switch as part of the selected program.

Whether you are recording in a professional or home studio or playing live through a combo or full stereo rack system, the JFX-1 puts a vast range of creative possibilities instantly at your fingertips.

It is advisable to keep this manual in a safe place for future reference after studying it carefully, as gaining a full understanding of how the JFX-1 operates will ensure that you are getting the most from it’s processing power- especially when designing your own personal sounds.

MIDI In

Output

Input

Footswitch

FX Send

LOUDSPEAKER

OUTPUTS

PARALLEL

STEREO LOOP

SERIES

MONO LOOP

FOOTSWITCH

LINE OUT

RIGHT LEFT RIGHT LEFT RIGHT

RETURN

LEFT

RETURN

SEND RETURN SEND

100W/ 4 ohms per channel 80W/ 8 ohms per channel

MIDI Foot Controller

JFX-1

Combo

FX Return

Set-up C: With a Stereo or Mono combo or amp.

Section 1 - Connection Diagrams

MIDI In

MIDI Out

Input

FX Send

MIDI In

FX Returns

FX RETURNS

L&R Inputs

MIDI Foot Controller

JFX-1

Pre-Amp

Outputs

Power Amp

L&R Outputs

Speaker Cabinets

Set-up B: Stereo Rack System.

Outputs

FX Send

L&R Return

JFX-1

Mixer

Set-up A: With a Home / Recording Mixer.

Please Note: The JFX-1 will also work with amps / combos operating in Mono. In this instance follow the

directions as above and link from either the Left or Right output to the Effects Return.

Power

9V AC

1.2A

MAINS INPUT

230V ~ 50 Hz 20 Watts

Manufactured in Great Britain by:

Marshall Amplification plc, Bletchley,

Milton Keynes, England.

Marshall Amplification Plc, England.

WARNING: Fire and Shock Hazard - Do not

Expose Unit to Rain or Moisture. Shock Hazard This Unit Must Be Earthed Do Not Open.

AVIS: Risque de choc Electrique - Ne Pas Ouvrir WARNING: No User Servicable Parts Inside.

Refer to Qualified Personnel.

MIDI

THRU

FOOTSWITCH

Out

Remote

Model No. JFX-1

WARNING! No user servicable parts inside; refer servicing to qualified personel only.

EFFECTS

+4 dB

-20 dB

R. RETURN R. OUTPUT L. OUTPUT R. OUTPUT L. OUTPUTL. RETURN

Right

+4 dB

-20 dB

MIDI

OUTTHRUIN SEND LEVEL LEVEL LEVEL

Left

Input

SPEAKER EMULATORMASTER

+4 dB

-20 dB

Power

9V AC

1.2A

Manufactured in Great Britain by:

Marshall Amplification plc, Bletchley,

Milton Keynes, England.

MIDI THRU

Out

Remote

Model No. JFX-1

WARNING! No user servicable parts inside; refer servicing to qualified personel only.

Right

Left

Input

Power

9V AC

1.2A

Manufactured in Great Britain by:

Marshall Amplification plc, Bletchley,

Milton Keynes, England.

MIDI THRU

Out

Remote

Model No. JFX-1

WARNING! No user servicable parts inside; refer servicing to qualified personel only.

Right

Left

Input

2.1 - Selecting a Stored Pre-Set

When you first switch on the JFX-1 it will automatically select program : 000. Thereafter it will go to the program location last selected before switching off.

To recall a stored program in the JFX-1, press the UP or DOWN keys until you reach the desired program location.

The Display Shows:

The program is automatically selected once you stop scrolling through.

2.2 - Editing Pre-Set Programs

To alter the parameters of a stored JFX-1 program you must first press EDIT.

The Display shows:

Then press EDIT a second time.

Now use the rotary data controls to adjust the parameter values.

DATA control

❶

adjusts the first

parameter (in this example ‘dcy’).

DATA control

❷

adjusts the second

parameter (in this example ‘room’).

DATA control

❸

adjusts the third

parameter (in this example ‘bright’).

As soon as any parameter is adjusted the ‘EDIT’ light will show.

Let us assume that you have altered the decay to value ‘50’, the type of reverb to ‘hall’ and left the character of the reverb on ‘bright’.

The Display shows:

2.3 - Storing Altered Parameter Values

To store altered parameter values, press the ‘STORE’ key.

The Display shows:

If you wish to store the altered parameters to

the same location, press ‘STORE’ a second time.

The Display shows:

If you wish to store the altered parameters to a different location, before pressing the ‘STORE’ key for the second time, use the ‘UP’ and ‘DOWN’ keys to select the new program location. E.G. from program 4 to program 54.

The Display shows:

Pressing ‘STORE’ again completes the store function.

2.4 - Naming a Program

To change the name of an existing or new program, press the ‘EDIT’ key.

The Display shows:

Press the ‘UP’ key to move the cursor along.

The Display shows:

Press the ‘EDIT’ key.

The Display shows:

Move the cursor along using the ’UP’ and ‘DOWN’ keys and as it rests under each letter, that character can then be altered using the Data control

❸

Follow the Store procedure for storing altered parameters by pressing the ‘STORE’ key once to show the desired program to which the name should be assigned and then a second time to complete the store.

Once the store function has been completed the ‘EDIT’ LED will go out.

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Data

Edit

Data

Edit

t Store

Edit Sy

➤

PROGRAM

004 : Live room

STORE PROGRAM

at : 004

PROGRAM

004 : live room

STORE PROGRAM

at : 054

REVERB : NAME : MODE

NAME :

004 : live room

REVERB : dcy 32

room : bright

REVERB : dcy 50

hall : bright

➤➤➤

➤

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Section 2 - Quick Reference Guide

1. Input Level Control

Selects the input level. The peak LED should light

occasionally at optimum level.

2. Toggle Switch

Press to display output levels of direct and effects signal. Press again to return the display to the point from where you last selected the ‘Toggle’ function.

3. Data Controls

Use the rotary controls to adjust parameters displayed by the LCD window.

4. Up & Down Keys

Use these to scroll through and select programs when in Normal mode. When in Edit mode use to select the parameters to be edited.

5. Edit LED

Indicates when a selected program has been edited

but not stored.

6. Edit Key

Press once to enter the program menu. Press again

to display parameter to be edited.

7. Quit Key

Takes you back to the original program number and

title.

8. System Key

Gives access to the MIDI functions and remote

jack.

9. Store Key

Press once to show the program location to which the altered parameters will be stored. Press again to complete the store.

Power

Made in England

Input Level

Peak

Data Data Data

SIGNAL PROCESSOR

Toggle

Edit

➤

JFX-1

➤

Edit System

Quit Store

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