MARSH SOUND DESIGN P2000T User manual

MARSH SOUND DESIGN
OPERATING MANUAL
PT2000
Preamplifier

Marsh
2
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.
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 point within an equilateral triangle is intended to alert the user to the presence of important
operating and maintenance instructions in the literature accompanying the appliance
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT OPEN OR
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
Warning

Marsh
3
Before proceeding with the installation, please read the instructions carefully and completely. If you have
any problems, do not hesitate to contact your retailer or our Service Department.
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 holding the 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 from the AC mains.
8. Do not replace any fuse with a value or type other than that specified.
9. Do not overload the wall outlet or extension cord because this can result in a 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 a problem 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 not operate the unit when the temperature and/or humidity are outside of this range.
Important/Precautions

Marsh
4
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.

Marsh
5
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

MSD's logo comes from an ancient Native American petroglyph pecked in
stone, high in the Sierra Nevada mountain range. Long ago, small, self-
sufficient groups of people moved about the mountains, hunting and
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 cannot imagine today.

Preface
Just as a great performer spends years learning his or her instruments, so a master designer spends years
understanding the complexities of audio circuitry and the science of electronics.
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.
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.
Richard N. Marsh,
So - set your course for the music . . .and leave the rest to us.

Marsh
8
Marsh
Unpacking
WARNING:
.
PEOPLE WITH BACK PROBLEMS SHOULD NOT UNPACK THIS EQUIPMENT
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.
1
2
2

Marsh
9
Placement Considerations
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.

BALANCE GAIN
DVD
TAPE MUTE POWER
TUNER
CD
VIDEO
LINE
REV
STEREO
MONO
HR
TH LA
IGH ESOLUTION
UBE- YBRID INE MPLIFIER
Marsh Sound Design MSD- 2000PT
Marsh
4
56
7
1
2
3
Marsh
10
1. POWER Press the POWER button to 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 requires this 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 unit is out of mute and ready to play.
Press POWER button again to turn the unit OFF. The LED will not be lit when the unit is
switched off.
2. MUTE Press the MUTE button to turn the sound off. Press the MUTE button again to resume
sound.
3. TAPE Press the TAPE button to selector TAPE input as the source. Press TAPE button again to
deactivate TAPE mode.
4. SELECTOR Turn the select knob to the 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 the stereo 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 output on 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.
REMEMBER: Every time the power is turned on, the unit will always start in a mute state.
Functions

Marsh
11
REC
TAPE LINE VIDEO DVD TUNER CD
RIGHT
LEFT
INPUTS
21
OUTPUTS
Marsh
MODEL: MSD- 2000PT
TUBE PREAMPLIFIER
SERIAL
NUMBER
POWER CONSUMPTION : 50 W MAX
60 HzAC 120 Volts
TO PREVENT FIRE AND SHOCK HAZARD, DO NOT
EXPOSE THIS DEVICE TO RAIN OR MOISTURE.
- DO NOT OPERATE WITH COVERS REMOVED -
CAUTION FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD, REPLACE ONLY
WITH SAME TYPE AND RATING FUSE.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
AVI S :RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR
WARNING INVERTED POLARITY
0.6A SLO-BLO
INPUTS The MSD-P2000T have a total of 6 line level inputs
REC (Recording output monitor) The MSD-P2000T has a recording monitor output for duplication.
.
1. CD Receives signals from a Compact Disc player.
2. TUNER Receives signals from a Tuner.
3. DVD Receives signals from a Digital Versatile Disc player.
4. VIDEO Receives signals from a VCR audio outputs.
5. LINE Receives signals from a line level source.
6. TAPE Receives signals from a cassette tape player.
7. TAPE (REC) Sends output signals from a selected source to cassette tape input. To record from 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 to a power amplifier (use in bi-amplifier application).
9. OUTPUT1 Sends signals to a power amplifier.
10. MAIN FUSE If there is a problem with the original fuse, replace with a fuse of the same type and rating.
11. POWER Connect the MSD-P2000T to the outlet with the enclosed power cord.
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 program polarity.
IMPORTANT: Operate the unit only from the power source of the appropriate voltage indicated on rear
panel.
456789
11
10
321
Connections

Marsh
12
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.
4. Low bass sound.
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.
Check the speaker cables for correct
phase connection.
Troubleshooting Guide

Marsh
13
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 THE ELECTRONIC COMPONENTS WITHIN THE UNIT.
Care & Maintenance

14
Marsh
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
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.
5.
for a period of TWO years from the date of purchase. Service must only be
done
A returned product must include a copy of the Warranty Certificate and the bill of sale and must be
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.
Warranty information

15
Marsh
Frequency Response, 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
Crosstalk at 10 kHz -90 dB
Input Power AC 110-120 V, 60 Hz
Power consumption 30 W
Size 19" W x 4 ½" H x 13" D
Weight Net 13 lbs (5.8 kgs), Shipping 16 lbs (7.2 kgs)
Specifications

16
Marsh
Dimensions P2000T
113.0 mm.
4 1/2”
BALANCE GAIN
DVD
TAPE MUTE POWER
TUNER
CD
VIDEO
LINE
REV
STEREO
MONO
HR
TH LA
IGH ESOLUTION
UBE- YBRID INE MPLIFIER
Marsh Sound Design MSD- 2000PT
Marsh
482.0 mm.
19.0”
113.0 mm.
4 1/2”
REC TAPE LINE VIDEO DVD TUNER CD
RIGHT
LEFT
INPUTS
21
OUTPUTS
Marsh
MODEL: MSD- 2000PT
TUBE PREAMPLIFIER
SERIAL
NUMBER
POWER CONSUMPTION : 50 W MAX
60 HzAC 120 Volts
TO PREVENT FIREAND SHOCK HAZARD, DO NOT
EXPOSE THIS DEVICE TO RAIN OR MOISTURE.
- DO NOT OPERATEWITH COVERS REMOVED -
CAUTION FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD, REPLACE ONLY
WITH SAME TYPE AND RATINGFUSE.
RISKOF ELECTRIC SHOCK
DONOT OPEN
CAUTION
AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR
WARNING INVERTED POLARITY
0.6A SLO-BLO
95.0 mm.
3 3/4”
482.0 mm.
19.0”
428.0 mm.
16 7/8”
95.0 mm.
3 3/4”
15.0 mm.
3/4”
329.0 mm.
13.0”
100.0 mm.
4.0”

Marsh
17
Notes

18
Marsh
Notes

19
Marsh
Notes

MARSH SOUND DESIGN
Email: [email protected]
www.marshsounddesign.com
Tel: [phone] Fax: [phone]
62 El Camino Drive, Corte Madera, CA 94925
Marsh