Eden METRO DC-210XLT Combo User manual

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Eden Electronics Operation Manual
World Tour Series Amplifiers
EDEN METRO
TWIN CHANNEL BASS GUITAR AMPLIFIER
The DC-210XLT Combo
OWNERS MANUAL
2-18-03 Rev. A

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Foreword
Congratulations on your purchase of the New Eden David series Bass Guitar
Combo Amplifier by Eden Electronics. We are proud to present our very best high
power Combo Amplifier. This Amplifier represents a great deal of research and
design effort. We have put our best cutting edge amplifier technologies, enclosure
design and styling together to create a great sounding Bass head with some
wonderful new features. All of this a driven by a monster 600 Watt RMS power
Amplifier.
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 a sound source and loudspeakers or
headphones, 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. DO NOT place your ears next to the speakers. If you experience
any discomfort or ringing in the ears or suspect hearing loss, you should consult a
health care professional.
Please complete for your records:
Date of Purchase: __________________________
Model: ___________________________________
Serial Number: _____________________________
Dealer: ___________________________________

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General Description
The DC-210XLT system is 23” x 21 ½” x 18 ”. It weighs only 85 Lbs. The Metro
features a one piece aluminum chassis, High efficiency power transformer, Dual
channels, thermostatically controlled fan, automatic limiter, a high temperature
Auto-limiting system, and international power supply voltages are available on
every model. The Output Power of the 600 Watts RMS @ 2 Ohms, 400 Watts
RMS @ 4 Ohms, and 240 Watts @ 8 Ohms output at full power. The THD is less
than .02%. The Metro also features a hybrid preamplifier consisting of a 7025
vacuum tube with Bi-Fet op-amps and overall modular construction.
Other professional features include: Fan cooling, Dual effect loops, Dual channel
selected D.I., Front end compressors for each channel, Enhance Control, Three
Band E.Q. with semi parametric E.Q. on channel (1), 5 band tone on channel (2),
Compressor Bypass, input pad, Tune to Mute, internal speaker on/off switch and
Stereo 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 Customer Service and
ask for technical assistance @ 847-949-0444.
Description of the Front Panel Controls
Channel (1)
Input Jack Channel (1)
The input signal is inserted here for normal 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.
Channel (1) Operating Characteristics
The number (1) channel is an all Bi-FET channel with a smooth crisp sound and a
simple easy to use and very pleasant sounding three band E.Q. section.

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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.
Input Pad
To activate the –12dB pad on the input of your unit pull out on the Gain Control
for the channel that you are using, both channels are equipped with this feature.
This should only be used for instruments with extremely high output signals.
Level set light
This is the Green LED indicator located 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. If the compressor bypass
switch is engaged the LED will come on more often in hard playing conditions.
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 that the bypass switch is useful for
getting that maximum punch when you are slapping or popping very hard.
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 to be about the
maximum effect on this control and minimum is off. This can be blended with the
other controls to create many unique sounds.
Mute to Tune

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When this switch (WORKS ONLY WITH THE FOOT 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 foot-switch LED is on (on those foot switches with
LED’s). Or the LED’s on the channel selector are both unlit.
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, Midrange, and High. The Low and High
filters are shelving type filters. The Midrange control is a band pass type filter.
This control gives you a broad general control of the tone shaping.
Channel Selector operation
The Channel Selector switch can be operated from either the front panel or from
the foot switch. The foot switch will override the front panel controls. If you plug
your instrument into the channel (2 Master input ) jack you can switch between
Channel (1) and (2) tone control sections and use your dual channel selector as a
dual tone selector.
D.I. Selector
The D.I. Output automatically follows the active channel.
This D.I. is adjustable from Microphone Level to line level. It is automatically
selected for the channel that is in use. The back panel Level Control makes
adjusting the level sent to the house P.A. very quick and easy.
Channel (2) Main Channel
Input Jack Channel (2)
The input signal is inserted here for normal operation. If this channel is used alone
it is possible to switch the other channel on and off though this jack using the
Channel selector. If both channels are in use, the switching will be either one or
two.
Channel (2) Operating Characteristics
This Channel features, a high quality 7025 vacuum tube front end coupled to a
versatile five way tone control system complete with Hi and Low shelving filters
coupled to a three way Quazi-Parameteric tone control system.

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Gain Control
This controls the available gain to the first preamplifier stage. For normal operation
run the input Gain between 9:00 and 2:00 for most instruments.
-12 dB Pad
Pulling out on the Gain Control knob operates the control and results in a signal
reduction of –12dB at the input.
Enhance Control
This is complex tone shaping network. It is designed to slightly boost the lower
frequencies. To scoop out the low midrange and add a boost to the high
frequencies all at the same time. The control is designed to give you a quick and
simple way to get a good modern Bass tone. The 12:00 position is considered to be
maximum effect on this control, and minimum is off. This control can be used
alone or with other tone controls.
Compressor and the Compressor Bypass Switch
This switch allows you to defeat or bypass the front end Compressor/Limiter. The
Compressor in your unit is a fixed threshold style compressor. You adjust the
amount of compression by turning the gain up or down until you get the desired
amount of compressor action that you want. You may find the bypass useful for
getting the maximum transients and increased punch when you are popping or
slapping.
The Main Tone Control Section
Bass Control
This control operates a shelving type filter that will cut or boost the low bass signal
by +/-15 dB at 30 Hz. The response from this control is flat at 12:00 o’clock.
This control gives a very solid feel to the bass. It is very effective on 5, 6 and 7
string Basses.
Treble Control

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The Treble control is also a shelving type filter and cuts or boosts the Treble by +/-
15 dB. Above 2 KHz. Flat response is at the 12:00 position.
Semi-Parametric Equalizer (Quazi-Parametric)
A fully Parametric Equalizer has controls for Bandwidth or (Q),
center Frequency, and the level of the boost or cut. These filters can
be very Difficult to set up correctly. It is very Easy to make a
fully Parametric EQ. sound bad. The Quazi-Parametric filter is much
less difficult for the User to adjust. We have Pre-set the Q or and width
to one octave. The Center Frequency is Adjustable from 40 Hz to
10KHz. The level of boost or cut is +/–15 dB. There is a bypass switch
for the EQ so that it can be used alone, or with the other tone controls.
Quasi-Parametric Tone Controls, How They Work
Quasi-Parametric controls are much like fully parametric tone controls except that
one of the adjustments are fixed and the operator cannot adjust the function. The
filters in the Eden DC-500 are adjustable for level up to +/-15 dB and for center
frequency (the pitch where the tone change happens). The bandwidth is fixed so
that the filters will interact smoothly and musically. If you put two filters together
they will combine for a total of +/-20 dB.
Low Frequency Parametric Filter
The Low control will cut or boost frequencies from the deep Bass to the lower
midrange as selected by the frequency tuning control directly above it.
Frequencies available with this control are from 30 Hz. to 300 Hz. The Low
control will cut or boost the selected frequency by up to +/-15 dB. This control
and all of the other controls produce a flat response when they are set at 12:00
o’clock.
Midrange Parametric Filter
The function of this control is also +/-15 dB and is similar to the Low control
except that it controls the frequencies from 200 Hz. to 2 KHz. This is the range of
frequencies that the Human Ear is most sensitive to. This control will let you cut
right through the mix if you need to.
High Frequency Parametric Filter

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This control works just like the midrange control with +/-15 dB of change
available. It regulates frequencies between 1.2 KHz and 12 KHz. This control is
very effective for bringing out the bright overtones on the bass.
E.Q. Clipping Indicator
This LED will light up if the signal is clipping any place in the tone control or Pre-
amp section. If this lights up while you are playing it will be necessary to redesign
your tone controls or lower you input gain to prevent signal distortion.
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.
Internal Speaker Switch
This turns on and off the internal speaker in the enclosure. It does not turn off the
External speaker Jacks, they will always be connected to the amplifier.
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

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Main AC Inlet (IEC standard)
This inlet fits a standard computer office machine AC cable 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 (3) speaker outputs provided (3) ¼” jacks. For 4 and 2 Ohm operation
we recommend using 14 Gauge or lower wire as they are much more robust than
lighter types and will deliver more power to the speakers. The DC-500 power
amplifier @ full limit puts out: @ 8 Ohms 200 Watts RMS, @ 4 Ohms 400 Watts
RMS, and @ 2 Ohms 600 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 Back
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. Pin 2 is
hot.
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.

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CREATING YOUR SOUND
This is what we have found to be the best way to get your sound out of the World
Tour amplifiers.
Setting the pre-amp to flat
Set the Enhance controls to “0” or Min.
Set all other tone controls straight up or in the 12:00 position
Set the master Volume control to (0)
Plug in you bass and speaker and turn on the amplifier.
Adjust the Master volume control to around 10:00 then adjust the Gain control to
the desired volume (if necessary to adjust the gain control beyond the 12:00
position, turn up the master control). The exception to this is some older passive
output Basses (i.e. Fender etc.). They may require the Gain control to be as high as
(3:00) to operate correctly.
Once the desired volume has been reached, rotate the Enhance control while
playing. It is possible for many players to achieve just the right sound by using the
control alone. If this adjustment does not provide you with the sound you want,
return the Enhance control to “0”.
Begin to create the tones you want at the treble end of the tone section first. Rotate
the Treble control right or left to the desired high frequency sound.
Now begin to build your midrange tones starting at the highest frequencies first.
With the upper knob of the High control in the 12:00 position, rotate the lower
knob to (the Level control) to the right for a peak in the sound or to the left to
produce a cut or dip. While playing your bass, rotate the upper knob right or left to
locate the frequency you want to hear more or less of in this range. After locating
this frequency, add or subtract frequency volume by rotating the lower knob right
or left of “0” position.
Follow this procedure for the other 2 parametric controls to finish defining your
desired midrange tone. Please note that tone control frequencies overlap. In the
event you find more than one frequency you wish to control in one of these ranges,
it may be possible to affect one of these frequencies with the overlapping control.)
Now recheck your volume to make sure it is still where you want it to be. You can
use the Bass control to add or subtract the low frequencies. If you change bass
tone you will need to readjust volume. At this time you may want to try adding

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some of the enhance control to see if this tone gives you more of what you want to
hear.
To sum things up
You will always have the best results creating a great bass tone around the natural
tone of your instrument.
High quality Bass Amplifier systems like the David Series products are designed to
enhance and deliver the natural good qualities of your instrument. If you are
playing a bass with extreme tonal qualities (like an upright or a vintage bass), it
may be helpful to use an equalizer (EQ) with your bass. The EQ can be installed
between the bass and the amplifier or inserted into the Effects Loop of the
amplifier. The closer to flat you are on the Tone Controls the more the natural tone
of your bass guitar will be able to come through. It will also sound more powerful
and dynamic. The golden rule of tone controls is that, “Those who equalize least
equalize best.” Use what you need but be careful not to over equalize. Powerful
tone controls can create problems as well as solve them.
Output Limit Light
This LED indicator is located next to the Master Control Level pot. 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.
Tube Replacement –Tube life varies greatly depending upon use, vibration, and
tube quality. It is uncommon for a tube to last less than a year in our circuits.
Tube life of several years is not at all uncommon. Symptoms of tube failure
include signal loss, distortion, and increased noise. The tube is easily replaced by
removing the unit’s cover. Use a genuine Eden 7025 / 12AX7 or equivalent.
Always disconnect the power cord from the back of the unit prior to removing
the cover.

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Service –In the event of amplifier malfunction, or questions about your unit’s
operating features, you should contact your Dealer, the factory or one of our
authorized service centers for assistance.
Please call our Customer Service dept. At 1-800-USSOUND (1-800-877-6863)
extension 5120
For more information or to obtain a Return Authorization number and
instructions for factory returns.
Please ship Authorized Returns for service to:
Eden Electronics
115 2nd St.
Montrose, MN 55363
Eden Electronics
C/O U.S. Music Corp.
444 E. Courtland Rd.
Mundelein, IL 60060
[phone]
[phone](fax)
[e-mail]
http://www.eden-eletronics.com
CR Eden Div. US Music 444 Courtland Rd., Mundelein, IL 60060

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Your Favorite Tone Settings__________________________