Sherbourn PRE-1 User manual

Table of Contents
3Thank You From Sherbourn
4Safety Precautions
6NEC (National Electrical Code) Standards
5
A Note for the Cable Television (CATV) Installer
Antenna Grounding Outside the House
Unpackin Your Sherbourn Preamplifier
7PRE-1 Preamplifier Features
8Front Panel Layout
9Rear Panel Layout
10 Remote Control
11 Connectin Audio Source Units
Connecting to Phono, CD, Tuner, Aux1 and Aux2, Tape, HT Input
Connecting to Amplifiers and Speakers
Trigger Connections
12Troubleshootin Guide
No Sound (from one or more full range speakers)
No Low Frequency (or poor output)
Sound Drops Out with CD or DVD Playback
Remote Not Working
External Amplifier(s) Shut Down (often or prematurely)
Remotely Connected External Amplifier(s) Do Not Turn Off With PRE-1
“Hum” Noises
Other Probable Causes of Speaker Noise
Problems with the whole A/V System
13 Licensin and Trademark Disclosures
13 Technical Specific ations

Thank You from Sherbourn
Thank you very much for your decision to purchase one of our superb Sherbourn
amplifiers. We take enormous pride in the design and build quality of all of our
products and we are confident that our product will provide you with many years of
enjoyable and trouble free service. Should you have any need to call upon our
services please feel free to contact us at the address shown at the end of this booklet;
or of course you can contact the dealership from which you purchased the product.
Full details of the warranty coverage provided by Sherbourn Technologies can be
found at the end of this booklet.
The Sherbourn Team
3

4
Important Safety Precautions and Explanation of Symbols
The exclamation point within an equilateral triangle is intended to alert the user to the presence of
important installation, operation, and service instructions in this manual.
The lightning ash with arrowhead symbol within an equilateral triangle is intended to alert the user
to the presence of uninsulated dangerous voltages within the enclosure that may be of sufcient
magnitude to constitute a risk of electrical shock to the user.
Please read this Installation and Operation Manual thoroughly before attempting to install, congure,
or operate the PRE-1. After successful installation and conguration of the PRE-1, be sure to retain
this manual in a safe place for future reference.
Safety is a key component to a long lasting and trouble free installation. Please read and follow
all instructions and heed all warnings on the PRE-1 and in this manual. The vast majority of the
subsequent safety precautions are common sense. If you are not comfortable with the installation
of audio/video entertainment equipment, you should seek the services of a qualied installation
professional or call us for help.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT USE THE
PRE-1 NEAR WATER OR IN WET LOCATIONS, DO NOT EXPOSE IT TO RAIN OR MOISTURE, DO
NOT EXPOSE IT TO DRIPPING OR SPLASHING FROM OTHER SOURCES, AND ENSURE THAT
NO OBJECTS FILLED WITH LIQUIDS (SUCH AS VASES) ARE PLACED ON IT. DOING SO MAY
RESULT IN DAMAGE TO THE PRE-1 AND THE RISK OF ELECTRIC SHOCK, WHICH MAY
RESULT IN BODILY INJURY OR DEATH.
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COV-
ER FROM THE PRE-1. THERE ARE NO USER-SERVICEABLE PARTS INSIDE THE PRE-1.
REFER ALL SERVICE TO QUALIFIED SERVICE PERSONNEL.
Do not install the PRE-1 near or above any heat sources such as radiators, heating vents, or other
apparatus that produces heat. Do not block any ventilation openings or heat sinks. Avoid installing
the PRE-1 directly above other heat-producing equipment unless sufcient ventilation or forced-air
cooling is provided.
Do not install the PRE-1 in locations without proper ventilation. The PRE-1 should not be operated
on a bed, sofa, rug, or similar surface that may block vents. The PRE-1 should not be installed in
an enclosed location such as a bookcase, cabinet, or closed equipment rack unless sufcient
forced-air ventilation is provided.
Always install your PRE-1 according to the manufacturer’s instructions and only use attachments or
accessories specied by the manufacturer.
Do not install the PRE-1 on any stand, shelf, or other piece of furniture that is unable to support its
weight. If a cart is used to move the PRE-1, use caution to avoid injury from tip-over.
Connect the PRE-1 only to power sources of the correct voltage (as shown in this manual and on
the PRE-1). Ensure that the Input Voltage selector switch on the rear of the PRE-1 is set to the
appropriate voltage.
Protect power supply cables from being pinched, walked on, or otherwise damaged. Be especially
careful where the power cable enters the power outlet and the PRE-1 unit.
Only connect the PRE-1 to an electrical outlet or extension cord of appropriate type and rating.
DO NOT defeat the safety purpose of a grounding or polarized plug by removing ground pins or using
unsafe adapters. A polarized plug has two blades - one wider than the other. A grounding plug has a
third ground prong in addition to the two main conductors. The wide blade or third groundling prong is
provided for your safety. If the provided plug does not t your outlet, consult an electrician to replace
your obsolete outlet. If you replace the PRE-1 power cord, only use one of similar type and equal or
greater current rating.
!
!

The power cable for the PRE-1 should be unplugged from the outlet during severe electrical storms, or
when unused for a long period of time.
Only replace the fuse in the PRE-1 with a fuse of proper value and voltage rating.
The PRE-1 should only be cleaned as directed in the Installation and Operation Manual. Avoid
spraying liquids directly onto the PRE-1 and NEVER spray liquids into the vents. Care should be
taken so that small objects do not fall into the inside of the PRE-1.
You should seek service for your PRE-1 by qualied service personnel if any of the following occur:
1. The power-supply cord or the plug has been damaged
2. Objects or liquid have fallen or spilled into the vents
3. The PRE-1 has been exposed to rain
4. The PRE-1 exhibits a marked change in performance
5. The PRE-1 has been dropped, or its enclosure or chassis is damaged.
NOTE: TO COMPLETELY DISCONNECT THE PRE-1 FROM THE AC POWER MAINS,
DISCONNECT THE AC POWER CORD FROM THE AC RECEPTACLE.
NOTE: THE POWER CORD ON THE PRE-1 MUST REMAIN READILY ACCESSIBLE AT
ALL TIMES.
FCC Interference Statement
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that the
interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that of the receiver.
Consult the dealer or an experienced radio/TV technician for help.
For questions regarding service, please contact:
Sherbourn Technologies, Inc.
131 SE Parkway Court
Franklin, Tennessee
37064
Tel ( 6 15 ) 79 1 - 4 04 6
Fax [phone]
Web www.sherbourn.com
!
CAUTION
CAUTION: TO REDUCE THE RISK
OF ELECTRICAL SHOCK, DO
NOT REMOVE COVER. NO USER
SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
5

NEC (National Electrical
Code) Standards
A Note for the Cable Television (CATV) Installer
This reminder is to call the CATV system installer’s atten-
tion to Article 820-40 of the NEC that provides g idelines
for proper gro nding and in partic lar, specifies that the
cable gro nd shall be connected to the gro nding system
of the b ilding as close to the point of cable entry as prac-
tical.
Antenna Grounding Outside the House
If an o tside antenna is connected to the receiver, be s re
the antenna system is gro nded so as to provide some pro-
tection against voltage s rges and b ilt- p static charges.
Article 810 of the National Electrical Code, ANSI/NFPA
70, provides information with regard to proper gro nding
of the lead-in wire to an antenna-discharge nit, connec-
tion to gro nding electrodes, and req irements for the
gro nding electrode. See diagram below.
Cable TV Coaxial Cable, Satellite Dish Cables and Tele-
vision Antennas should be grounded BEFORE the point o
entry into the house.
Always observe proper antenna or satellite dish ground-
ing techniques. When lightning strikes, there is always the
possibility that your antenna or dish (mounted high on the
roo ) can become a conduit or lightning and electrically
damage any equipment to which it’s connected. Addition-
ally, proper grounding o ers sa ety to the people using the
audio/video system in the event o an electrical problem.
Unpacking the PRE-1
All Sherbo rn preamplifiers are do ble boxed to s rvive
the rigors of long distance shipping and arrive to yo
ndamaged. The o ter box may show wear and tear, b t
this is no ca se for alarm. The o ter box’s p rpose is to
protect the inner box. If the inner looks heavily damaged,
and yo are concerned abo t damage to the preamplifier,
please call Sherbo rn Technical S pport at 615-791-4046.
Inside the laminated inner box, the preamplifier is sec rely
seated between to two reinforced pieces of high-density impact
foam. At first glance, the cardboard backing on the foam
may give the appearance of a third box, b t it is easily lift-
ed to reveal the preamplifier, which is wrapped in static
free plastic. The plastic sheeting is t cked nderneath the
preamplifier and sec rely taped. It is recommended that
the plastic sheeting be removed after the amp is lifted o t
from the box.
The bottom piece of foam is molded to fit tightly against
the preamplifier, b t there is a recessed area on each side,
allowing yo to get yo r hands nder the preamplifier and
lift it o t of the box.
Inventory: Incl ded with yo r PRE-1 preamplifier
sho ld be an IEC Class 1 two prong power cord and this
man al.
It is important to save all the packing materials and the boxes in
case yo r PRE-1 ever needs to be moved or shipped back
to the factory for service.
Make s re yo keep yo r sales receipt. It is the only way
for Sherbo rn to establish the d ration of yo r Limited
Warranty and it may come in sef l for ins rance p rpos-
es.
Re ording the Serial Number
Please read the serial n mber located on the rear panel
and record it below along with the date of p rchase.
Model PRE-1
Serial N mber ____________________
Place of P rchase ____________________
Date of P rchase ____________________
6

PRE-1 Features
Precision low noise phono input with moving magnet or moving coil capability
Seven stereo inputs with precision instrumentation grade relay switching
Microprocessor controlled pure analog signal path
Full remote control operation
Gold plated discrete RCA connectors for all inputs and outputs
Tape monitor loop
Home Theater Bypass
Stereo / Mono switching
Large format precision film volume potentiometer with motorized control
Headphone output
lluminated input indicators
12V trigger output
EC power inlet, 120/230 VAC user configurable
7

Front Panel Layout
Input Indicator LEDs
LEDs above each selectable button illuminate when the
labeled function is engaged. All of the labeled indicators
are available as remote commands.
1. I/R Receiver Window
Point the remote at this window for operation of the PRE-
1 by remote.
2. CD Player Source Selection Button
elects a properly connected CD Player as input source.
. Tuner Source Selection Button
elects a properly connected Tuner as input source.
4. Auxiliary 1 Source Selection Button
elects any 2 channel audio device with analog outputs
connected to the AUX 1 inputs as input source.
5. Auxiliary 2 Source Selection Button
elects any 2 channel audio device with analog outputs
connected to the AUX 2 inputs as input source.
6. Phono Source Selection Button
elects a properly connected turntable as input source.
7. Tape Monitor button
This ‘loop’ connects an external recording device to the
PRE-1 Preamplifier via RCA outputs and inputs. While
this traditionally has been a cassette player or DAT player,
this connection could also be a hard drive based recording
device as long as the input and output connections are
analog RCA audio connections.
8. HT Bypass Button
Push to bypass all of the preamp functions of the PRE-1,
allowing the PRE-1 to be a pass through.
9. Mono Button
Push to combine left and right (L+R) channels of the PRE-
1.
10. Tone Button
Activates or bypasses use of treble and bass controls.
11. Mute Button
Push to mute the PRE-1.
12. Power Button and standby LED
The power button is a non-latching momentary button that
turns the PRE-1 on or off. On indicates with a blue LED.
Off indicates with red LED.
1 . Headphone Jack
tandard 1/4” gold-plated headphone jack is provided on
the front panel.
14. Bass Control Knob
Increases or decreases bass level.
15. Treble Control Knob
Increases or decreases treble level.
16. Motorized Volume Control Knob
Motorized precision film pot volume control is adjustable
manually or with remote.
8

Rear Panel Layout
1. TRIGGER OUTPUT
Allows a mono to mono 3.5mm cable to remotely trigger
another device on and off, along with the PRE-1. C rrent
is limited to 500mA, which is s fficient to trigger two
devices. For triggering more devices, yo may want to se
a separate triggering device, like the Sherbo rn ET-3.
2. PHONO INPUT Section (clockwise from top left)
•Phono Gro nd
•Left and Right channel RCA inp ts
•MC/MM Switch. Use this switch to select yo r cart-
ridge type. MC for Moving Coil or MM for Moving
Magnet.
. AUDIO Section (from left to right)
•CD Player inp ts (Switchable Balanced or Unbal-
anced)
•T ner inp ts
•A xiliary 1 inp ts - S itable to connect to any a dio
device with Left and Right analog o tp ts.
•A xiliary 2 inp ts - S itable to connect to any a dio
device with Left and Right analog o tp ts.
4. TAPE INPUT/OUTPUT
A tape loop is provided for recording 2-channel so rce
material from a Cassette, DAT or a Hard Disk A dio
device with analog o tp ts.
5. HT INPUT (Home Theater) Switchable Balanced or
Unbalanced
Allows the PRE-1 to connect to an external
m ltichannel/home theater processor. This connection is
disengaged when the PRE-1 is in normal mode, b t be-
comes active when the HT BYPASS b tton is selected
on either the PRE-1 front panel or remote control. In HT
BYPASS mode, this connection becomes active and the
PRE-1 becomes a pass-thro gh. This is a tr e 'straight
wire' pass-thro gh - what comes in is what goes o t.
NOTE: HT INPUTS are only active when the PRE-1 is
on. ALL PRE-1 unctions become disabled in HT BYPASS
mode, allowing the external processor to control volume,
EQ, etc.
AUDIO OUTPUT SECTION
6. Balanced Output
Balanced (XLR) connection for left and right speakers.
7. RCA Outputs
Standard RCA connections for left and right speakers.
8. Main Power Switch
This rocker switch provides the master power for the PRE-1.
After it is in the ON position, the PRE-1 can be t rned on
man ally from the front panel switch, remote control, or
a tomatically with the trigger inp t via a
3.5mm inp t jack.
9. Power Receptacle Uses standard IEC power cord.
9

Remote Control
The PRE-1 has a dedicated remote control that offers dis-
crete buttons for most of the critical PRE-1 controls.
1. Power Buttons
Discrete buttons to turn the PRE-1 on and off, as indic-
ated.
2. Volume Controls
Applies continuous increase (+) or decrease (-) in olume
le els while buttons are held down. The PRE-1 olume
knob mo es in correspondence with these controls.
3. Source Selection Buttons
These buttons select the arious PRE-1 source inputs.
LEDs on the front panel of the PRE-1 will light in corre-
spondence with the selected input.
•CD - selects CD player input as source.
•PHONO - selects Phono input as source.
•TUNER - selects Tuner input as source.
•AUX 1 - selects Aux 1 input as source.
•AUX 2 - selects Aux 2 input as source.
4. Mode Buttons
Select the indicated function for the PRE-1. Front panel
LEDs light in correspondence with the selected mode.
•MONO - switches audio output from stereo to mono.
Pressing a second time restores signal to stereo
(default).
•TAPE - Push to select the inputs on the Tape Monitor
section to pass through the outputs of the tape monitor
section. When not selected, any selected input passes
through the output of the Tape Monitor output.
•HT (Home Theater Bypass) -When pushed, the HT Input
connections will pass through the PRE-1, bypassing
the PRE-1 completely.
•TONE – Allows one to acti ate or deacti-
ate the bass/treble controls.
•MUTE - mutes the PRE-1.
Changing the Battery
The PRE-1 remote is powered by 2 AAA batteries. To add
fresh batteries, press in the battery co er tab, remo e the
battery co er, exchange the batteries and orient the negat-
i e and positi e ends as indicated by the images in the bat-
tery compartment. Sherbourn recommends using alkaline
batteries.
10
PRE-1

Connecting Audio Source
Units
The PRE-1 can connect to up to seven different audio
devices, using standard RCA analog connectors.
PHONO
Connects to a turntable using standard RCA type
connectors. Connect the Left output on the turntable to the
Left input of the P ONO INPUT section on the PRE-1,
and the Right output to the Right input of the P ONO
INPUT section of the PRE-1.
Also note the connection of the chassis ground tab
between the turntable and preamplifier. This is necessary
for audio signal reference so the PRE-1 processes signal
from the turntable with minimal unwanted noise.
Select the type of cartridge, either high output Moving
Magnet (MM) or low output Moving Coil (MC) by
moving the switch to the appropriate positions.
If you are not sure which type of cartridge you have, select
MM first and then if the noise level is too high, try
selecting MC instead.
The PHONO input is not designed for line level sources
such as CD players or other devices. Please ONLY
connect turntables with oving agnet or oving Coil
needle cartridges to this input to avoid damage.
If you are using a separate preamplifier for your
turntable, do not use the PRE-1 Phono input section.
Use either the AUX1 orAUX2 inputs. The PRE-1 Phono
input is a high gain input, and turntable preamplifiers
have high gain output. Combining the two would result
in an extremely high gain signal that would cause
unwanted distortion.
CD
Connects to a CD player using standard RCA type
connectors. Connect the Left output on the CD player to
the Left input of the CD INPUT section of the PRE-1, and
the Right output on the CD player to the Right input of the
CD INPUT section of the PRE-1.
* This is not a dedicated input, and can be used as an input
for a device other than a CD player.
TUNER
Connects to a Tuner using standard RCA type connectors.
Connect the Left output on the Tuner to the Left input of
the TUNER section of the PRE-1, and the Right output on
the Tuner to the Right input of the TUNER section of the
PRE-1.
* This is not a dedicated input, and can be used as an input
for a device other than a Tuner.
AUX1 & AUX2
These inputs can be used with most 2 channel audio
source devices, including DVD players, personal
computers, portable media players, MP3 players/docks,
etc. Depending on the type of media player and/or
docking station available, direct RCA outputs may not be
available, so a 1/8" stereo mini jack to RCA adapter may
be necessary to complete the connection. Analog outputs
on the audio devices are necessary to connect to the
PRE-1.
TAPE
This 'loop' connects an external recording device to the
PRE-1 preamplifier via RCA outputs and inputs. While
this traditionally has been a cassette player or DAT
player, this connection could also be a hard drive based
recording device as long as the input and output connec-
tions are analog RCA audio connections.
To enable the tape monitor loop you must connect to the
inputs AND outputs on the PRE-1 labeled "TAPE" on
the rear panel. To engage the tape monitor loop, select
TAPE from the PRE-1 front panel or remote.
Please note -these outputs are unaffected by any
external signal processing.
To engage the recording device, first press TAPE from
the front panel or remote and then it will allow you to
"monitor" the audio that the recording device will record.
When you are ready to record, engage the recording de-
vice.
HT INPUT
Connects to an external multi-channel, or 'home theater'
processor using standard RCA type analog connectors.
When the T BYPASS button is selected, all PRE-1
functions are disabled, and it becomes a pass-through for
the connected external processor. The T inputs are only
active when the PRE-1 is on.
Connecting To Amplifiers an Speakers
When connecting to amplifiers and speakers, make sure
to use the properly labeled connections.
Check to make sure that you have connected the
proper cables in the proper sequence:
•Left and right channel PRE-1 outputs into left
and right channel amplifier inputs.
•Left and right channel amplifier outputs to
left and right speakers.
NOTE: Do not connect speakers irectly to the PRE-1.
11

Also use high quality, 100% shielded, oxygen free copper
cables.
Trigger Connections
12VDC trigger used to remotely trigger a connected
device on and off. Please ensure that the total of the loads
connected to this trigger do not exceed 500mA.
Troubleshooting Guide
The Sherbourn PRE-1 is expertly designed and built to
provide years of trouble-free performance. Most problems
that occur can usually be solved by checking your
connections or making sure that the audio and video
components connected to the PRE-1 are on and fully
operational. The following information will help you deal
with common problems you may experience during initial
use of your unit. If problems persist, contact Sherbourn’s
service department for assistance.
No Soun (from one or more full range speakers)
•Speaker cables may have come undone from the
amplifier. Turn off your system and check the speaker
cables, and tighten the binding posts.
•Audio output cables that connect PRE-1 to the
amplifier(s) may not have a good connection. Turn off
your system and check all audio cable connections.
•An audio cable may have an internal break. Switch
cable with a different channel to see if the problem
migrates to a different channel or stays in the affected
channel(s).
•The correct input is not currently selected.
•The mute switch is on.
Soun Drops Out with CD or DVD Playback
•Make sure the disc is not dirty or scratched.
•Some inexpensive players and changers tend
to mistrack more often than you would like.
Remote Not Working
•Make sure the AAA batteries are not dead or in-
stalled incorrectly.
•Make sure that the PRE-1 front panel receiver win-
dow is not obstructed.
External Amplifier(s) Shut Down (Often or
Prematurely)
•Make sure each speaker's average impedance is not
less than your amplifiers can safely handle.
•The amplifier(s) have good ventilation, no vents
are covered.
•Check that the amplifier(s) power output is a good
match for your speakers. If your speakers are inef-
ficient, consider using larger power amplifiers.
•Make sure all wiring is correct and there are no shorts.
If wires have been run under carpet, under base boards
(or along tack strips) there is a possibility they can
easily be shorted by sharp edges or something that
punctures the insulation. Also, if your wiring is in the
walls - make sure that there was not an accidental
"staple" puncture from securing wiring to framing
studs or wall/floor joists. This evaluation is easily
done with an Ohm meter.
Remotely Connecte External Amplifier(s) Do
Not Turn Off with PRE-1
Check the following:
•Make sure the 1/8" plug is connected between
PRE-1 trigger output and the amplifier(s) trigger
input(s).
•Make sure the total consumption of the connect-
ed devices do not exceed 500mA
•If you have spliced the plug to one or more amplifier
turn on inputs, remember the center pin is positive
and the outer shield is negative. This output is
12VDC.
"Hum" Noises
This problem is more than likely caused by a "ground
loop" in your system, rather than a fault in the PRE-1.
Follow these steps to isolate the main cause of the hum;
there may even be more than one. Remember to turn
off all components in your system (including the
PRE-1) before disconnecting or connecting any cables.
Disconnect the following items in order, and check
each time if the hum has gone away:
•Disconnect all cables which come from outside the
room, such as cable TV, satellite TV, or roof top an-
tennas. Make sure that they are disconnected where
they first enter the room, so they are making no
connection to the PRE-1, the TV, or any other
component. If the hum is caused by the cable TV line,
you will need a "ground loop isolator." This is an
inexpensive device fitted in-line with the coaxial
cable feed. Contact your cable company or your
Sherbourn Dealer for assistance.
•Disconnect any component which has a ground-
ed power cord.
•If the hum persists, disconnect all the source compo-
nents one at a time from the back of the PRE-1 until
you identify the problem. (Ground loop isolators are
available for audio lines and video. Ask Sherbourn
12

for assistance)
•Try moving the speaker cables away from any power
cords. Try just one speaker, connecting it to different
channels and see if an amplifier channel is bad.
•If you are still having a problem, remember that
Sherbourn's technical support staff will assist you.
Other Probable Causes of Speaker Noise
•Speaker noise may also be caused by interference
or noise on your AC line. Make sure there are no
large appliances sharing the line, halogen lamps, or
light-dimming Triac devices.
•Try connecting your system to another AC socket on
a separate line.
•If the hum is heard from within the PRE-1 and not
through the speakers, this may also be caused by
interference on the AC or DC lines. The power
transformers may turn this interference into an audi-
ble noise. Internal hum can be made worse by a shelf
or cabinet resonating, so try moving the PRE-1 to
another shelf.
•Try moving your components further away from the
TV, especially if you ever notice the screen has
changed color in the area closest to the component.
•If you have very high efficiency speakers, these
may tend to reveal noises which other speakers do not.
Problems with the whole A/V System
If you are having more complex problems in your overall
home entertainment system (not just with the PRE-1
preamplifier/processor), please contact Sherbourn
directly for professional installation assistance. These
professionals have years of experience with a wide range
of home entertainment and products and can offer you
assistance in troubleshooting and rectifying problems.
Licensing and Trademark
Disclosures
Sherbourn Disclosure
All Rights Reserved. Sherbourn reserves the right to make
improvements to its products at any time. Therefore, the
specifications of the product and the specific details of this
manual are subject to change at any time.
Technical Specifications
Preamp Audio Section
Phono Input:
Moving Coil – 240 ohm
Moving Magnet – 47k ohm
Input Impe ance Line In: 47K ohm +/-5%
Signal-to-Noise Ratio (rel 2V out): >116dB (ref 2V)
Distortion: < 0.005% 20 z - 20k z with 80k z
measurement bandwidth
Frequency Response: 5 z - 80k z +/- 0.05 dB
5 z - 250kHz +/- 1 dB
Maximum Line Out Level: 9V RMS
Groun Floor Noise Level: > 20uV
Channel Separation @ 1kHz: > 80dB
Other Details
Trigger Output: 12 VDC, 3.5mm jack, Center Pin is
Positive / Current Load <120mA
Electrical Power Requirement: 115VAC, 60 z or
230VAC, 50-60 z User Selectable
Raw Weight: 14 Ibs
Dimensions:
Width: 17 inches
Depth: 14 inches (including RCA jack extension)
eight: 3.75 inches (faceplate only) - 4.25 inches
including feet
13

Sherbourn Technologies, LLC Ten-Year Limited Warranty
What does this warranty cover? Sherbourn Technologies, LLC (“Sherbourn”) warrants its prod-
ucts against defects in materials and workmanship. This warranty is subject to revision at any
time.
How long does this coverage last? This warranty commences on the date of retail purchase
by the original retail purchaser and runs for a period of ten (10) years thereafter, with the following
exceptions: (1) receivers (including the SR-8100, SR-8200, and SR-120), preamp/processors
(including the PT-7030, PT-7020C4, and PT-7020), preampliers (including the PRE-1), and the
CD-1 CD Player (with the exception of the slot load CD engine) are covered by this warranty for
ve (5) years from the date of retail purchase by the original purchaser; and (2) electromechanical
components, including the slot load CD engine on the CD-1 CD Player, and all fans (including
the C-12 Cooling Unit), are covered by this warranty for three (3) years from the date of retail
purchase by the original retail purchaser. This warranty is transferrable, upon written notication
to Sherbourn, to any person that owns the warranted product, however, if ownership is transferred,
the Term shall be no longer than ve (5) years from the date of purchase by the original purchaser.
Sherbourn warrants any replacement product or part furnished hereunder against defects in
materials and workmanship for the longer of the following: (i) the amount of time remaining under
the original warranty, or (ii) 120 days from your receipt of the repaired or replaced product. The
duration described in the previous 3 sentences is hereinafter referred to as the “Term”. TO THE
FULLEST EXTENT PERMITTED BY LAW, ALL IMPLIED WARRANTIES RELATED TO THE
ORIGINAL PRODUCT AND ANY REPLACEMENT PRODUCT OR PARTS (INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) ARE
EXPRESSLY LIMITED TO THE TERM OF THIS LIMITED WARRANTY. SOME STATES DO
NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE
LIMITATION MAY NOT APPLY TO YOU. A claim under this warranty must be made by you within
the Term. A claim shall not be valid (and Sherbourn has no obligation related to the claim) if it is not
made within the Term and if it is not made in strict compliance with the requirements of the “How do
you get service?” section.
What will Sherbourn do? Sherbourn will, at its option, either: (i) repair the product, or (ii) replace
the product with a new consumer product which is identical or reasonably equivalent to the product.
Sherbourn may provide you with a refund of the actual purchase price of the product in the event
(i) Sherbourn is unable to provide replacement and repair is not commercially practicable or cannot
be timely made, or (ii) you agree to accept a refund in lieu of other remedies hereunder. When
a product or part is repaired or replaced, any replacement item becomes your property and the
replaced item becomes Sherbourn’s property. When a refund is given, the product for which the
refund is provided must be returned to Sherbourn and becomes Sherbourn’s property.
What is not covered by this warranty? This warranty does not apply: (i) to damage caused by
use with non-Sherbourn products, where the non-Sherbourn product is the cause of the damage;
(ii) to damage caused by service or maintenance performed by anyone who is not a representative
of Sherbourn; (iii) to damage caused by accident, abuse, misuse, ood, re, earthquake or other
external causes; (iv) to a product or part that has been modied after its retail purchase, where
the modication caused or contributed to the damage; (v) to consumable parts, such as batteries;
(vi) normal wear tear; or (vii) if any Sherbourn serial number has been removed or defaced and
Sherbourn cannot otherwise conrm that you are the original retail purchaser or authorized trans-
feree. SHERBOURN SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING FROM OR RELATED TO ANY DEFECTS IN OR DAMAGES TO ITS

PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION
MAY NOT APPLY.
How do you get service? In order to make a claim under the warranty, you must:
1. Call a customer service representative (“CSR”) of Sherbourn at (1-877-366-8324).
Provide the CSR with a description of your problem and the serial number of the product for which
the warranty claim is being made.
2. The CSR will provide you with a returned material authorization number (“RMA”).
3. Ship the product to Sherbourn at the following address, with the RMA written in large,
bold letters on the outside of the box, and with the letters “RMA” written before the number. Parcels
arriving without an RMA number on the outside of the box will be refused.
Sherbourn Technologies, LLC
Attn: Repair Department
131 Southeast Parkway Court
Franklin, TN 37064
How does state law apply? This warranty gives you specic legal rights, and you may also
have other rights which vary from state to state. CERTAIN STATES HAVE ENACTED LAWS
WHICH PRECLUDE THE WAIVER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES AND/
OR PRECLUDE THE WAIVER/LIMITATION OF IMPLIED WARRANTIES. TO THE EXTENT
YOUR STATE HAS ENACTED A LAW WHICH PROHIBITS SUCH A WAIVER/LIMITATION, ALL
SUCH WAIVERS/LIMITATIONS CONTAINED IN THIS WARRANTY ARE INAPPLICABLE TO YOU.
CERTAIN STATES HAVE ENACTED LAWS WHICH REQUIRE THE DURATION OF A WARRANTY
TO BE EXTENDED (INCLUDING BUT NOT LIMITED TO DURING PERIODS OF REPAIR). TO
THE EXTENT YOUR STATE HAS ENACTED A LAW OF THIS NATURE, THEN THE DURATION
OF THIS WARRANTY WILL BE EXTENDED AS REQUIRED BY APPLICABLE LAW.