Eden NEMESIS NA-600 User manual

NEMESIS NA-600

OWNERS MANUAL

600 WATT RMS

BASS GUITAR AMPLIFIER

DRAFT RELEASE 6-17-97

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Congratulations on your purchase of the New Nemesis NA-600 Bass

Guitar Amplifier by Eden Electronics. We are proud to present our

Retro styled Hi tech Bass Guitar Amplifier, the NA-600. This Amplifier

represents a great deal of research and design effort. We have put our

best new technologies and some eye catching styling together to create a

great sounding Bass head with an exciting visual appeal, great features

and a monster 600 Watt RMS power Amplifier.

General Description

The NA-600 is 24” x 14 “ x 10”. It weighs only 45 Lbs. It has abuilt in

lighting ,both for effect and control panel illumination. The NA-600

features a massive 18 gauge steel chassis, back lighting, thermostatically

controlled fan, automatic limiter, built in road case, a high temperature

Auto-limiting system, and international power supply voltages are

available on every model. The Output Power of the NA-600 is 630

Watts RMS @ 2 Ohms, 435 Watts RMS @ 4 Ohms, and 270 Watts @ 8

Ohms output. THD less than .02%, all modular construction, and all Bi-

Fet operational amplifiers.

Other professional features include: Fan cooling, Dual effect loops,

Front panel controlled D.I., Front end compressor, Edge control,

Enhance Control, Three Band E.Q. with semi parametric E.Q.,

Compressor Bypass, Gain Booster, Tune to Mute, Pre/Post D.I. selector,

and Head Phones.

The unit carries a two year limited Warranty. Always use an authorized

service center or the factory if you ever have a problem with your unit. If

you have any questions about the operation of your unit, please call us at

the Eden factory and ask for technical assistance @ 612-675-3650.

Description of the Front Panel Controls

Input Jack

The input signal is inserted here for standard operation. Because of the

wide level range available from our special input and gain circuitry, only

one input jack is required for both passive and active instruments.

Gain Control

The gain control is used to match the output level of your instrument to

the proper operating level for the Amplifier and Compressor Limiter.

For normal operation you should set the control between 10:00 and 1:00,

unless you have an unusually high signal output Bass or a very low

output Bass.

Level set light

This is the red LED indicator next to the Gain Control. It should be set

to blink on the peaks for normal operation. In hard playing conditions it

will come on more or less depending on how high the gain is set.

Compressor and the 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 your slapping or popping

hard.

Gain Booster Switch

This switch is set up to let you switch between standard gain and high

gain on the fly. The Booster switch provides 6 dB of Boost to the signal

when engaged. The light is on in the High gain position. Engaging the

high gain switch may also work very well for older very low output

Instruments.

Edge Control

This is a great new feature for Nemesis. It 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 at (min.) 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

The Enhance control is a complex tone shaping pre-set. It is designed to

boost the lower Bass frequencies, to scoop out the low midrange and

boost the high end up all at the same time. The control is designed to

give you a very quick and simple way to get a good quality modern Bass

tone. 12:00 is considered about max. effect on this control and min. is

off. This can be blended with the other controls to create many unique

sounds.

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 (Quazi-Parametric)

A fully Parametric Equalizer has controls for Band width, center

frequency and the level of boost or cut. These filters can be very difficult

to set up correctly. These EQs have lots of good as well as bad sound

combinations. Our Semi-Parametric filter has the Bandwidth fixed at a Q

of (1), or in musical terms it is set a one octave in width. The center

frequency is adjustable from 40 Hz to 10KHz. The level of boost or cut

is +/– 15 dB. There is also a switch to bypass the EQ so that it can be

used alone as a separate sound or with the other tone controls.

Three Band Tone Controls

The main tone control section is a simple Three Band tone equalizer. It

divides the audio spectrum into three bands: Low, Mid, and High. The

Low and High filters are shelving type filters. The Mid control is a band

pass type filter. This control gives you a broad general control of the

tone shaping.

Artist Controlled D.I. Selector and Level Control

This D.I. is adjustable from Microphone Level to line level. It can be

selected for pre tone or post tone operation. The front panel Level

Control makes adjusting the send to the house P.A. very quick and easy.

Output Limit Light

This LED indicator is located between the D.I. Level and Master Control

Level pots. It will come on when the amplifier hits full output power.

This should light up on occasion when the amplifier is played hard. It

should not be on all the time.

Master Level Control

This control is directly ahead of the output power amplifier. It controls

the main stage sound level and the Head Phone outputs.

Head Phones

The Head Phone jack is provided for practicing and can be used as an

additional signal send or slave output as it follows the Master Control.

Light Switch and Internal Lighting

This lighted switch turns the internal light on and off. The internal

lighting on your unit is designed to ( PULSE and DIM ) just as the

amplifier reaches full power. These lights respond in the same way as

the old vacuum tube systems did when they sucked all the available

power out of power supplies at high playing levels.

Mains AC Power Switch

This turns your unit on and off. Due to the international voltage selector

that your unit is equipped with the AC Mains power switching is placed

ahead of the fuse. It is possible for the fuse to be blown and the indicator

light to be on. It is set up that way to meet certain European Safety

regulations. Always be certain the unit is properly set up for the correct

voltage of the country it is being used in. If you have any questions

about this call either the factory or an authorized service center and find

out before you attempt to use your unit. If you need to change operating

voltages for international travel call ahead and make certain that you

know the voltage and line cord required by the country you will be going

to. Always have a qualified technician do the voltage changes.

The Back Panel Operation

Main AC Inlet (IEC standard)

This inlet fits a standard computer office machine AC cord interconnect.

The Fuse is located just above the plug receptacle. The correct voltage is

displayed in the upper left corner of the holder and should read correctly

with the rest of the printing on the amplifier. If a fuse blows replace it

ONLY WITH THE SAME TYPE AND SIZE. The voltage of operation

will be marked on the back of the unit.

Speaker Outputs

There are (4) speaker outputs provided (2) NL4 connectors and (2) ¼”

jacks. For 4 and 2 Ohm operation we recommend using the NL4

connectors as they are much more robust than the ¼” type and will

deliver more power to the speakers. The hot pins on the NL4 are the pins

1 + and -. The NA-600 power amplifier @ full limit puts out: @ 8

Ohms 270 Watts RMS, @ 4 Ohms 435 Watts RMS, and @ 2 Ohms 630

Watts RMS.

Recording Output and Ground Lift

The 3 pin XLR jack provides the direct connection for a recording or

live P.A. console. It is fully balanced and is controlled by the D.I. level

control on the front panel. The ground lift effects only pin (1) of the

XLR and breaks the ground path from that pin to the chassis to reduce

ground loop induced hum and noise.

Post Tone Effects Loop

This loop is set up after the tone controls and just before the power

amplifier input. It breaks the circuit between the preamplifier and the

power amplifier when in operation.

Pre Tone Effects Loop

This loop is before the tone controls. The send can be used as an extra

signal output without breaking the loop. This loop is a good choice for

outboard compressors and limiters.

Tuner Output

This gives you a place to connect your tuner out of the direct signal path

of the Bass. It is always on. Even when the mute is engaged the output

stays connected.

For Your Safety

Always use a correctly grounded outlet for your amplifier. Replace your

fuse with only the same size and type of fuse. Your unit has a two year

warranty described in the warranty section of your manual.

If you have questions about the operation of your unit or have any

service needs please contact us @ Nemesis service 1-612-675-3579 or

612-675-3650 and ask for the Nemesis Service Dept.

CR Eden Electronics Inc. Montrose, MN 55363

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