Eden Nemesis NA650 Bedienungsanleitung

Nemesis

Owners Manual

NA650

Bass Guitar Amplifier

THE LEADER IN BASS AMPLIFICATION.

Bass Guitar Amplifier

NEMESIS NA-650

OPERATION MANUAL

Publishing Date 08-10-2005

FOREWORD

Congratulations on the purchase of your new Nemesis NA650 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 Nemesis

amplifiers the most musical and reliable Bass amplifiers available.

This manual will cover domestic and international versions of the NA650

Integrated Amplifier.

The NA650 delivers 275 watts RMS output @ 8 Ohms, 440 watts @ 4

Ohms and 650 watts @ 2 Ohms, all with +3dB of headroom. 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 its class. The pre-amplifier section, with its familiar Eden Enhance control

and powerful 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 Nemesis 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

welded steel chassis with steel top to ensure maximum reliability. The

modular design allows quick repair in the field should such a need arise.

The Nemesis line of 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!

Please complete for your records:

Date of Purchase: __________________________

Model: ___________________________________

Serial Number: _____________________________

Dealer: ___________________________________

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.

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.

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.

Compressor Bypass Switch – This switch allows you to bypass the front

end Compressor/Limiter. The Compressor/Limiter in your unit is a fixed

threshold type. You adjust the Compression level by turning the gain control

up or down until you get the amount of compression you want. You may

find the bypass switch useful for getting that maximum punch when you are

slapping or popping hard.

Gain Boost Switch – Depressing this switch engages a +10dB boost. This

feature is useful for basses that have a low signal level. The light is on in the

High gain position.

Edge Control – Allows you to dial in as much or as little vintage tube style

distortion as you like. The control produces a warm single-sided, even order

harmonic distortion that sounds just like the old tube heads. With the control

turned fully counter-clockwise, the circuit is bypassed. The farther to the

right you turn the control the more distortion you will get. The distortion is

fairly subtle at low input levels and is more pronounced at high gain settings.

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).

Mute to Tune –When this switch is engaged it mutes both the stage sound

and the D.I. send. Only the tuner output stays hot. The Mute is on or muted

when the LED is on.

Semi-Parametric Equalizer –Allows you to dial in a specific frequency to

enhance or cut. This feature is especially useful for upright and acoustic bass

guitars that have a resonant frequency. Because we’ve included a bypass

switch, you can also use it to create a second tone that is available

instantaneously. (You’re welcome.) The frequency is adjustable from 40Hz

to 10KHz. The level can be adjusted +/- 15 dB. The control is FLAT when

the level control is at 12:00 position (straight up).

Three Band Tone Controls – Divides the audio spectrum into three bands:

Bass, Mid, and Treble. The Bass and Treble controls are shelving type

filters. The Mid control is a band pass type filter. These controls give you a

broad general control of the tone shaping.

D.I. Selector – Allows the user to choose to send the D.I. either pre-EQ or

post-EQ.

D.I. Level – Controls the level being sent from the XLR balanced output

jack. We suggest setting the control at approximately 12 o’clock initially. If

the signal to the board is too hot, it’s better to engage the Input Pad on your

channel of the board than to turn it down here, if at all possible. In general,

it’s better (in terms of signal-to-noise ratio and dynamic presentation) to

send as hot a signal as possible to the board. However, you can adjust the

signal level, if necessary, so make sure your soundperson or recording

engineer is aware of this capability.

Master Volume – Controls the main stage sound level and the Head Phone

outputs.

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.

DC Indicator – When lit, shows that the low voltage power supplies are

operating.

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.

However, the DC Indicators will not illuminate if the fuse is blown.

IMPORTANT NOTE: When attached, the included lighted footswitch will

defeat the Front Panel controls for the Mute to Tune and Enhance Bypass

functions.

BACK PANEL FEATURES

Amplifier Power Rating:

RMS output (with +3 dB headroom):

275 Watts @ 8 Ohms

440 Watts @ 4 Ohms

650 Watts @ 2 Ohms

Cooling System – Your amplifier features a thermostatically controlled fan,

which will switch on when the internal temperature reaches 130 degrees F.

In low volume situations (into 8 Ohm loads) the fan may not come on at all.

The cooling system also features a high temperature thermal safety system,

which will activate a circuit if the operating temperature goes above 200

degrees F. This circuit will automatically turn off the output of the system in

the event of overheating. It will automatically reset itself as soon as the unit

cools down to a safe operating temperature.

NOTE: the D.I. will continue to operate normally even when the amplifier is

in thermal safety mode. Only the stage sound will be lost.

IMPORTANT NOTE: Excessive heat is a Very Bad Thing and can

result in severe damage to your amplifier. DO NOT bypass or

disconnect any part of your thermal safety system. Doing so will

immediately void your warranty!

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 – 6 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 - 7 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 3 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.

Speaker Outputs – These consist of two ¼ inch jacks and two 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.

Ground Lift Switch – This switch lifts the ground within the balanced

output system to allow you to eliminate excessive noise/ground loops when

connected to external systems.

Recording Out (D.I.) – This fully balanced XLR output allows you to send

a pre- or post-EQ signal to a recording or sound reinforcement mixing

console. We use Pin 2 hot configuration. Adjusting the Master Volume

control will not affect this send. This output is designed to use with phantom

powered systems. However, it never hurts to turn off the phantom power at

the board, if possible.

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.

Tuner Out Jack – This standard ¼ inch jack is designed to provide a pre-

gain signal for connection to a tuner. It can also be used to provide pre-tone

signal to other devices such as a direct box or console. The signal is enough

to provide adequate signal to virtually every tuner on the market.

OPERATING INSTRUCTIONS

Mechanical and Thermal Issues – During operation, your amplifier should

always be placed away from sources of moisture or heat. Care should be

taken not to obstruct the ventilation holes on the bottom and sides of the

unit. In the event of thermal shutdown, you should eliminate the cause of the

thermal problem (poor ventilation, speaker loads lower than 2 ohms)

immediately. The supplied rack ears can be used to install your amplifier in

a conventional equipment rack for protection during transportation.

Electrical Connection – The NA650 requires at least 10 Amps of correctly

wired alternating current for proper operation. Providing less than 10 Amps

of power may result in poor amplifier performance, so it’s probably not a

good idea to plug all of your band’s gear into a single wall outlet.

Connections – All instrument-level input connections (everything but the

speakers) should be made with high quality shielded cables. The use of

speaker cables for input connections will result in excess noise. Speaker

connections should be made with high quality 16 gauge or heavier

unshielded speaker cables. We recommend 10 or 12 gauge cables. The use

of shielded line or instrument cables for speaker connections can

damage your amplifier. The speaker cable should be as short as possible.

INITIAL SET UP

As bassists, each of us has in our head a concept of our perfect sound. Eden

amplifiers are designed to help you easily achieve the sound you hear inside

you. However, it’s a multi-step process as explained below.

In order to ensure the ultimate in tone, it’s important to follow the procedure

outlined below. Don’t skip steps; don’t jump around. Yes, this may take a

minute or two, but the work is well worth it. Once they’ve done it a few

times, most users can do it time and again in about a minute.

IMPORTANT NOTE: Before you plug in your unit for the first time,

please do the following things. First, turn the power switch to the OFF

position. Check the back of your unit for the correct voltage notation for

your county of operation.

Once you’ve ensured correct voltage, set the Master Volume control to

minimum (fully counter-clockwise). Set the tone controls to the center

position (12:00 or 0). Turn the Enhance control to the minimum position. Set

the Input Gain control to the minimum (fully counter-clockwise). Set the

Compressor to the OFF position (push the switch IN). This will set your

amplifier up flat and with the Compressor disengaged. Next, plug in the

power cord to the AC inlet on the back of the unit. Use only a safe grounded

receptacle for proper operation at the correct voltage for your country.

Double check to make certain your amplifier is set for the correct voltage in

your country. Double check that all connections and switches are correct for

your chosen mode of operation.

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