Eden WT550 User Manual

World Tour

Bass Guitar Amplifier

Covering Model

WT550

THE LEADER IN BASS AMPLIFICATION.

©08-10-2005 by U.S. Music Corp.

Bass Guitar Amplifier

WT550

OPERATION MANUAL

Publishing Date 08-10-2005

FORWARD

Congratulations on the purchase of your new Eden World Tour Integrated
Amplifier System. All of us at Eden are totally committed to providing you
with the very best bass guitar systems in their class. Our goals are to offer
you the outstanding performance quality of a top-notch, professional bass
amplification system at a reasonable price point, and to make World Tour
amplifiers the most musical and reliable Bass amplifiers available.

This manual will cover domestic and international versions of the WT550
Integrated Amplifier.

The WT550 delivers 300 watts RMS output @ 8 Ohms, 550 watts @ 4
Ohms and 750 watts @ 2 Ohms (per channel), with +3dB of headroom at all
impedances. This amplifier also features a thermostatically controlled, active
cooling system with built-in thermal safeties.

You have purchased what we feel is one of the finest bass amplifiers
in the world. The tube pre-amplifier section, with its familiar Eden Enhance
control and powerful 5-way, semi-parametric tone control system is coupled
to a gentle auto-compression circuit, allowing you to achieve a wide array of
sounds. This compact, rack mountable package houses modular circuits
made with superior components and designed for years of trouble-free
service.

The Eden World Tour products group is the result of our quest for ultimate
bass tone and maximum reliability. Your amplifier was designed, engineered
and manufactured equivalent to aircraft vibration standards and housed in a
one-piece aluminum case with steel top to ensure maximum reliability. The
modular design allows quick repair in the field should such a need arise.

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The Eden line of World Tour amplifiers is the result of our research and
development in combining high performance and compact size. Just as a
skilled craftsman needs good quality tools that won't let him down on the
job, so does a good musician. We hope you enjoy the tool we’ve created for
you. Have fun; play low!

Please read this manual in its entirety before operating your new amplifier.
Failure to do so could result in misuse or damage. We’ve taken the time to
write it, which was a lot longer than the time it will take for you to read it.
Help us help you by taking a few moments to learn how to properly use your
new amp. You’ll be glad you did!

CAUTION!

Your ears are your most important piece of
equipment. Unfortunately, they cannot be replaced
as easily as your other gear. Please take the
following warning seriously.

This product, when used in combination with
loudspeakers and/or additional amplification may
be capable of producing sound levels that could
cause permanent hearing loss. DO NOT operate at
high volume levels or at a level that is
uncomfortable. If you experience any discomfort or
ringing in the ears or suspect hearing loss, you
should consult an audiologist.

Thank you for your purchase of an Eden bass
guitar product. This unit has been designed and
constructed to give you years of trouble-free service.

Please take the time to review this manual

and to send in your warranty registration card.

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FRONT PANEL FEATURES

Input Jack – Designed to accept a standard ¼ inch mono phone plug. For

best results use a high quality shielded cable to connect your instrument to
the amplifier. The input is buffered and will handle standard passive, high
level active, and piezo input signals.

Gain Control – Regulates the first gain stage of the preamplifier and
controls the amount of signal available to the system.

Input Pad – Pull the Gain control out to engage a –12dB pad on the input
stage. This is especially useful for high gain instruments. When engaged, the
indicator light to the left of the Input Gain control will be lit.

Set Level Indicator – This light helps the user set the appropriate amount of
gain. When set properly, the indicator should light on your loudest/lowest
notes. We’ll go over this in more detail later in the manual.

Enhance Control – Called the “Magic Knob” by some, this complex
control simultaneously boosts the very low bass, upper middle, and high
frequencies while putting a dip in the lower middle frequencies.
It is flat when set to its minimum level (fully counterclockwise).

Compressor Defeat – To defeat the Auto-Compression circuit, pull the
Enhance Control out.

Compressor Indicator Light – Indicates compression is taking place. This
indicator is directly above the Set Level indicator.

Tone Control Section

These controls allow you to boost or cut the tone at the desired frequency.
The spacing allows the controls to interact smoothly and musically. From
left to right, the controls and switches are:

Bass – This traditional shelving tone control provides 15 dB of boost or cut
at approx. 30Hz. The control is flat in the 12:00 position.

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Semi-Parametric Controls

There are three sets of semi-parametric controls. Each set has a Frequency
control (top knob) and a Level control (bottom knob). The Level controls
provide 15 dB of cut or boost. The control is FLAT in the 12:00 position.
From left to right, the Frequency controls have the following ranges:

30-300Hz 200Hz-2KHz 1.2-12KHz

Treble – This traditional shelving tone control provides 15 dB of boost or
cut at approx. 11KHz. The control is flat in the 12:00 position.

EQ Clip Light – indicates clipping in the EQ section. Clipping is a Very
Bad Thing and should be avoided at all times. We’ll tell you how to avoid

this later in the manual.

Master Level Control – Adjusts overall system output and stage loudness.

Headphone Jack – Accepts a standard ¼ inch stereo or mono headphone

plug. It can also be used as a Master Output send to slave another amplifier.

Output Limit Indicator – Lights to indicate activity of the power amplifier
limiting circuit, which protects the speaker system from severe distortion.
These LEDs indicate that the amplifiers have reached their maximum output
level.

Mains On/Off Switch – This switch turns the system power ON or OFF.
The switch illuminates to indicate the presence of AC power present in the
chassis. This switch is prior to the fuse. The light in the switch may flicker
depending on local voltage conditions. This is normal and nothing to be
concerned about.

NOTE: The Mains Switch will illuminate even if the fuse is blown.

REAR PANEL FEATURES

Amplifier Power Rating (RMS with +3dB headroom):

300 Watts @ 8 Ohms
550 Watts @ 4 Ohms
750 Watts @ 2 Ohms

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Combination Power Cord Jack and Fuse Holder – The removable power
cord is attached here. To access the fuse holder, pull the holder out of the top
of the power receptacle. Your unit was shipped with a spare fuse inserted in
the fuse carrier. USE ONLY THE SAME SIZE AND TYPE FOR

REPLACMENT. Using a fuse with a different rating than specified is a
VERY BAD THING and can cause damage to your amplifier. All

models come with a holder marked (FUSE) or (115/230) and are factory
configured for 100/120/ 230/240 only and must be adapted by a service tech
for any voltage change.

Fuse Requirements:

USA @ 120 Volts /60 HZ – 8 Amps, 5 x 20 mm GMC/T/slow blow
Europe @ 240 Volts/50 Hz - 3 Amps, 5 x 20 mm GMC/T/slow blow
Japan @ 100 Volts/60 Hz - 10 Amps, 5 x 20 mm GMC/T/slow blow

IMPORTANT NOTE: Always use slow blow or time delay type fuses.
Do not use fast blow fuses.

To convert your amplifier from US to European fusing, remove the Fuse
Holder and insert a 5 Amp slow blow fuse. Flip the fuse holder over and
reinsert.

IMPORTANT NOTE: In order to operate properly in other parts of the
world, your amplifier may require minor modifications. These
modifications must be made by a QUALIFIED technician. Contact your
local distributor for further information.

Amp Outputs – These consist of two ¼ inch jacks and an NL-4 connector

(sometimes called a Speakon). The jacks are wired in parallel. The total
speaker load impedance should not go below 2 ohms. On NL-4 connectors,
we use +1, -1 connections.

Mono Pre-EQ Effects Send/Return – These standard ¼ inch jacks allow
you to send and receive your signal to and from external devices. This
effects loop is positioned post (behind) the compressor and before the
Enhance control and the tone section. This loop is at line level; do not use
instrument level effects in this loop as they tend to be overloaded by the
higher signal level which can cause distortion.

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