Eden NEMESIS NA-600 User manual

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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.

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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.

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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.

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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.

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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.

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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.

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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