DigiTech RPM1 User Manual

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DigiTech RPM1 User Manual

18-2124-A

RPM-1

Vacuum-Tube Rotary Speaker Emulator

Safety Precautions

Contents

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

ATTENTION: RISQUE DU CHOC ELECTRIQUE - NE PAS OUVRIR

The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash with arrow point in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is necessary for users to refer to the owner’s manual.

These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit. Do not attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the chassis for any reason will void the manufacturer’s warranty. Do not get the unit wet. If liquid is spilled on the unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during lightning storms or wind storms to prevent damage.

Power and Grounding

2

Introduction

2

Front Panel

3

Rear Panel

4

Connection Diagrams, Setting Levels

4

Performance Notes

5

Suggested Settings

5

What is a rotary speaker?

6

Specifications, Warranty

7

The information contained in this manual is subject to change at any time without notification. Some information contained in this manual may also become inaccurate due to undocumented changes in the product since this version of the manual was completed. This manual supercedes all previous versions. DigiTech RPM-1 July 26/95 Manual Copyright © 1995 IVL Technologies Ltd.

Software Copyright © 1985–1995 IVL Technologies Ltd. Patents and patent applications:

US Patents 4,688,464, 5,231,671, 5,301,259 and 5,428,708; Patent applications: International PCT/CA93/00099

Canada: 2,090,948, Japan 1994-502785, Europe: 92914139.8

DigiTech and the DigiTech logo are registered trademarks of DOD Electronics Corporation RPM-1 and the ivl logo are trademarks of IVL Technologies Ltd.

Power and Grounding

Information:

The RPM-1 is equipped with a three-prong, grounded power cord for your protection. Do not cut off the ground prong of the plug, and do not use an adapter or extension cord to plug the unit into a two prong outlet unless the adapter or extension cord is properly grounded.

The RPM-1, like any piece of music hardware, is sensitive to voltage drops, spikes, and surges; interference such as lightning or power “brownouts” can permanently damage the circuitry inside the unit. Here are some suggestions to help protect your RPM-1 from such a fate:

Turn it off: Make a habit of turning off all of your gear when it is not in use. If there is lightning or a severe windstorm, unplug all of your equipment: A surge from a nearby lightning strike or downed power line can destroy electronic equipment even if the switch is off.

Spike/Surge Protectors: This is an inexpensive solution to all but the severest of AC line conditions. Surge protected power strips are usually slightly more expensive than unprotected strips, and higher quality multi-stage surge suppressors usually start under $50, making them a worthwhile investment for protection of all your valuable electronic equipment.

AC Line Conditioners: This is the best (but most expensive) way to protect your musical equipment from line voltage fluctuations. Line conditioners constantly monitor the incoming voltage for excessive peaks and dips and make adjustments accordingly, delivering consistent power levels. For expensive studio equipment, AC line conditioners are highly recommended.

Introduction:

2

Thank you for purchasing the DigiTech RPM-1, a new effect that creates a classic sound.

When electric organs were first sold, their sound was static and needed some “animation”, so the rotating speaker cabinet was born. The rotating speaker sound became synonymous with blues, jazz and rock & roll, especially when players discovered that they could drive the cabinets’ built-in tube amplifiers into distortion and get a thick, warm sound as well as the swirling rotary effect. (See diagram, page 6)

The DigiTech RPM-1 allows you to emulate that classic rotating speaker sound without having to deal with the bulky speaker cabinets that were formerly required.

Based on extensive study of rotating speaker cabinets, the DigiTech RPM-1 incorporates speaker emulation circuitry which delivers an authentic sound by recreating the individual horn and cabinet resonances of a real rotating speaker.

There are several features of the DigiTech RPM–1 that make it unique:

1)Where competing products use solid-state distortion circuitry to simulate overdriven sounds, the DigiTech RPM-1 is unique in that it uses a vacuum tube analog distortion pre-amp. The 12AX7A pre-amp stage gives you the authentic, rich, warm overdriven sounds previously attainable only with actual rotating speaker cabinets.

2)Only the DigiTech RPM-1 gives you the flexibility to run mono, stereo, or tri-output mode to simulate the most effective microphone arrangements on stage or in the studio.

3)The DigiTech RPM-1 is a ruggedly built, 1U full rack-mount unit, with AC power. No external power supplies or flimsy plastic cases.

4)While other units are based on modified chorus or phase-shifting circuits, only the DigiTech RPM-1 incorporates patented Intelligent Pitch Shifting technology together with VLSI delay and volume modulation circuitry for maximum realism.

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