MARSH SOUND DESIGN
OPERATING MANUAL
Preamplifier
PT2000
Warning
The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence
of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to people.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION:
To prevent the risk of electric shock, do not remove the cover (or back) . No user-serviceable parts inside.
Refer servicing to qualified service personnel.
The exclamation pointwithin an equilateral triangle isintended to alert the userto the presence of important
operating and maintenance instructions in the literature accompanying the appliance
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT OPEN OR
EXPOSE THIS APPLIANCE TORAIN OR MOISTURE.
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Important/Precautions
Before proceeding with the installation, please read the instructions carefully and completely. If you have
any problems, do not hesitate to contact your retailer orour ServiceDepartment.
1. All warnings on the unit and in the operating manual should be followed.
2. Operate the unit only from a power source of the appropriate voltage indicated on the rear panel.
3. Do not use a damaged or deformed power cord as it may cause electric shock. When removing the plug
from the wall outlet, be sure to remove by holdingthe plug attachment and not by pulling the cord.
4. This unit should not be used near water or in humid conditions.
5. Do not pour or spill liquids of any kind onto this unit.
6. Do not operate this product with any cover removed.
7. Before connecting or disconnecting any cables, always turn off your equipment and disconnect your
entire system fromthe ACmains.
8. Do not replace any fuse with a value or type other than that specified.
9. Do not overload the wall outlet or extensioncord because this can result ina risk of fire or electric shock.
10. Do not push objects of any kind into this product through the openings e.g., ventilation slots, because
they may touch dangerous voltage points or short-out parts. This act could result in a fire or electric
shock.
11. Do not attempt to repair this product because opening or removing covers may expose you to dangerous
voltage or other hazards. If aproblem occurs, contact your Marsh retailer.
12. Disconnect your entire system from the AC mains before cleaning.
13. Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of this
product and to protect it from overheating. These openings must not be blocked or covered.
14. The operating temperature ranges from +5 to +35 degrees C. Operating humidity ranges from 5% to
80%. Do notoperate theunit when the temperature and/or humidity are outside of this range.
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Thank You for purchasing the MARSH SOUND DESIGN MSD-P2000T.
MSD brings you extraordinary components that are true, above all, to the art of music.
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Table of Contents
Important/Precautions..............................................................................................2
Preface.....................................................................................................................6
Unpacking............................................................................................................8
Placement Considerations.........................................................................................9
Functions.................................................................................................................10
Connections............................................................................................................11
Troubleshooting guide.............................................................................................12
Care & Maintenance...............................................................................................13
Warranty information................................................................................................14
Specifications.........................................................................................................15
Dimensions..............................................................................................................16
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SD's logo comes from an ancient Native American petroglyph pecked in
stone, high in the Sierra Nevada mountain range. Long ago, small, self-
M
gathering, and celebrating rituals. Leaving behind little about themselves, except for
these rock figures and a few stone tools. The mark we found, created a thousand years
ago, could have been a sun sign, a map, or a symbol of focus and concentration-or yet
some mystery we cannotimagine today.
sufficient groups of people moved about the mountains, hunting and
Preface
ust as a great performer spends years learning his or her instruments, so a master designer spends years
understanding the complexitiesof audiocircuitry and the science of electronics.
J
For more than 30 years, author, lecturer, engineer, and inventor, has shared the art of
perfecting audio circuits with other designers. Now, his goal is to bring you his accumulated experience in the
service of music.
The Marsh Sound Design team builds its products to the most exacting standards of design and construction, for
simplicity of use, long life and timeless performance. Your investment in a Marsh product means that you can
forget about the hardware and focus on years of enjoyment.
So - set yourcourse for the music . . .and leavethe rest to us.
Richard N. Marsh,
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Unpacking
1
2
WARNING:
WITHOUT ASSISTANCE
1. Carefully lift the unit out of the box.
2. Remove the foam packing material.
3. Set up the unit for use.
REMEMBER: Keep all the original packing in case it is necessary to return the unit for servicing.
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PEOPLE WITH BACK PROBLEMS SHOULD NOT UNPACK THIS EQUIPMENT
.
DO NOT INSTALL THE UNIT IN THE FOLLOWING LOCATION:
1. In a place subject to direct sunlight.
2. In a humid place.
3. In an extremely hot or cold place.
4. In a place subject to vibrations.
5. In a dusty place.
6. In a poorly ventilated place.
Placement Considerations
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Functions
MUTE
7
POWER
2
1
4
DVD
TUNER
CD
TAPE
VIDEO
LINE
5
MONO
TH LA
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HR
IGH ESOLUTION
UBE- YBRID INE MPLIFIER
STEREO
REV
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6
BALANCE GAIN
3
1. POWER Press thePOWER buttonto turn the unit ON. The LED will appear BLUE when the unit
is ON. The MSD-P2000T will remain in a mute state for approximately 50 seconds after
turning it on to allow for component stabilization. The vacuum tube requiresthis time to
become operative. The power LED will be dimly lit while the unit is in a mute state. The
LED will be fully lit when the unitis outof mute and ready to play.
Press POWER button again to turn the unit OFF. The LEDwill not be lit when theunit is
switched off.
2. MUTE Press the MUTE button to turn the sound off. Press the MUTE button again to resume
sound.
REMEMBER: Every time thepower is turned on, the unit will always start ina mute state.
3. TAPE Press the TAPE button to selector TAPE input as the source. Press TAPE button again to
deactivate TAPEmode.
4. SELECTOR Turn the selectknob tothe desired source input.
5. MODE Normal operation is STEREO mode . If a source is mono sound, select MONO mode to
ensure the usage of both speakers.
If you want to change the speaker output to the opposite of that in which the sound was
recorded (from right to left and vice versa), select REVERSE mode. This is useful if the
original recording was made improperly or to test thestereo system.
6. BALANCE Turn the balance level knob to adjust the sound balance between the two speakers. Leave it
in the center position to give equal outputon both channels.
Sometimes in unequal source recording, you may need to adjust the balance level to get a
balanced stereo sound. If the sound is weaker on left side, move the knob to left until you
hear equal sound from both speakers and vice versa.
7. GAIN Adjust the output level.
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10
Connections
OUTPUTS
0.6A SLO-BLO
CAUTION
RISKOFELECTRIC SHOCK
DONOTOPEN
AVIS
:RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR
WARNING
TOPREVENT FIRE AND SHOCK HAZARD, DO NOT
EXPOSETHIS DEVICE TO RAIN OR MOISTURE.
-DO NOT OPERATE WITH COVERS REMOVED -
CAUTIONFOR CONTINUED PROTECTION
AGAINSTFIRE HAZARD, REPLACE ONLY
WITHSAME TYPE AND RATING FUSE.
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MODEL: MSD- 2000P T
TUBE PREAMPLIFIER
SERIAL
NUMBER
60HzAC120 Volts
POWERCONSUMPTION : 50 W MAX
21
INVERTED POLARITY
11
INPUTS TheMSD-P2000T have a totalof 6line level inputs
REC
TAPE LINE
.
INPUTS
DVD
VIDEO
456789
321
TUNER CD
LEFT
RIGHT
1. CD Receives signals froma Compact Disc player.
2. TUNER Receives signals froma Tuner.
3. DVD Receives signals froma Digital Versatile Disc player.
4. VIDEO Receives signals froma VCRaudio outputs.
5. LINE Receives signals froma linelevel source.
6. TAPE Receives signals from a cassette tape player.
REC (Recording output monitor) The MSD-P2000T has arecording monitor output for duplication.
7. TAPE (REC) Sends output signals from a selected source to cassette tape input. To recordfrom the
program source onto cassette tape, turn the selector knob to the source program you
wish to record and press record on cassette tape player.
OUTPUTS The MSD-P2000T has 2 outputs for connections to power amplifier.
8. OUTPUT 2 Sends signals toa power amplifier (use in bi-amplifier application).
9. OUTPUT1 Sends signals to a power amplifier.
NOTE The output signal is inverted polarity to the source signal, you may need to change the polarity of both
left and right speakers cables to get the correct programpolarity.
10. MAIN FUSE If thereis aproblem with the original fuse, replace with a fuseof thesame type and rating.
11. POWER Connect the MSD-P2000T to the outlet with the enclosed power cord.
IMPORTANT: Operate the unit only from the power source of the appropriate voltage indicated on rear
panel.
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Troubleshooting Guide
If the unit does not function properly, please check the list below and follow the instructions.
If the problem still occurs, please contact our service department.
PROBLEM
1. Unit does not turn on.
The LED is not lit.
2. No sound.
3. No sound from one speaker.
SOLUTION
Confirm that the power cord is plugged in
properly.
Check If the fuse is still good.
Check the speaker cable connection.
Check the interconnect cable connection.
Check the speaker or interconnect cable
connection.
Check the BALANCE control on the
preamplifier, make sure that It is in the
middle position.
Check the MUTE switch.
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4. Low bass sound.
12
Check the speaker cables for correct
phase connection.
Care & Maintenance
Use a soft, dry cloth to remove dust from the cabinet. For stubborn dirt, soak the cloth in a weak detergent
solution. Be sure to wring the cloth well before wiping the unit. Use a dry cloth to wipe it dry. Do not use any
volatile agents such as benzine or thinner. They may damage the surface of the cabinet.
CAUTION: DISCONNECT YOUR ENTIRE SYSTEM FROM THE AC MAINS BEFORE
CLEANING. NEVER APPLY LIQUID CLEANSERS DIRECTLY TO THE UNIT. IT MAY RESULT
IN DAMAGE TO THEELECTRONIC COMPONENTS WITHIN THE UNIT.
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Warranty information
1. A MARSH SOUND DESIGN warranty only applies to the original retail purchaser. The warranty
certifies that the product is free from defects in material and workmanship and authorizes free service
and/or parts exchange
done
at an authorized MARSH SOUND DESIGN Service center.
2. The warranty is subjected to the following conditions and limitations. The warranty is void if the
product has been used in a manner other than that specified within the operating manual, if the
product has been abused or misused, or if the product has been repaired by anyone other than an
authorized MASH SOUND DESIGN Service center.
3. The warranty does not apply to defects or failure caused by usage of unauthorized parts, improper
maintenance, fire, flood, lightning or other natural causes.
4. This warranty does not cover damage to the external parts, e.g. Front panel, knobs, casing, etc.
for a period of TWO years from the date of purchase. Service must only be
A returned product must include a copy of the Warranty Certificate and the bill of sale and must be
5.
sent in the original packaging.
6. The warranty does not extend to any incidental or consequential cost or damage to the purchaser
caused by a malfunction of the product.
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FrequencyResponse, 20-20,000 Hz +/- 0.1 dB
THD+noise at 1 Vrms, 20-20,000 Hz <0.05%
Input Impedance 50 kOhms
Maximum Gain 23 dB
Signal to Noise ratio, A weighted 90 dB
Maximum Output at 1kHz 8 Vrms
Crosstalk at 1 kHz -90 dB
Specifications
Crosstalk at 10 kHz -90 dB
Input Power AC 110-120 V, 60 Hz
Power consumption 30 W
Size 19" W x 4½" H x 13" D
Weight Net 13 lbs (5.8 kgs), Shipping16 lbs (7.2kgs)
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Dimensions P2000T
95.0 mm.
3 3/4”
0.6ASLO-BLO
CD
TUNER
DVD
TAPE
AVIS
:RISQUEDE CHOC ELECTRIQUE-NE PAS OUVRIR
TOPREVENTFIRE AND SHOCK HAZARD, DO NOT
EXPOSETHISDEVICE TO RAIN OR MOISTURE.
-DONOT OPERATE WITH COVERS REMOVED -
CAUTIONFORCONTINUED PROTECTION
AGAINSTFIREHAZARD, REPLACE ONLY
WITHSAMETYPE AND RATING FUSE.
CAUTION
RISKOFELECTRIC SHOCK
DONOTOPEN
WARNING
STEREO
REV
VIDEO
LINE
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MONO
BALANCE GAIN
113.0 mm.
4 1/2”
HR
IGH ESOLUTION
TH LA
UBE- YBRID INE MPLIFIER
Marsh Sound Design MSD- 2000PT
MUTE
POWER
482.0 mm.
19.0”
428.0 mm.
16 7/8”
TAPE LINE
INPUTS
DVD
VIDEO
TUNER CD
LEFT
RIGHT
113.0 mm.
4 1/2”
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MODEL: MSD- 2000P T
TUBEPREAMPLIFIER
SERIAL
NUMBER
POWERCONSUMPTION : 50 W MAX
OUTPUTS
REC
21
INVERTEDPOLARITY
60HzAC120Volts
482.0 mm.
19.0”
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100.0 mm.
4.0”
16
329.0 mm.
13.0”
95.0 mm.
3 3/4”
15.0 mm.
3/4”
Notes
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Notes
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Notes
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MARSH SOUND DESIGN
Email: sales@marshsounddesign.com
www.marshsounddesign.com
Tel: (415) 927-4672 Fax: (415) 924-6846
62 El Camino Drive, Corte Madera, CA 94925
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