GFP-715
Wide Bandwidth Stereo Preamp
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TABLE OF CONTENTS
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . 3
Precautions and Warnings . . . . . . . . . . . . . . . 4
Introduction & Key Features . . . . . . . . . . . . . 5
Safety Information . . . . . . . . . . . . . . . . . . . . . 5
Front Panel Illustration . . . . . . . . . . . . . . . . . 6
Rear Panel Illustration . . . . . . . . . . . . . . . . . . 6
Description of Front Panel . . . . . . . . . . . . 6-7
Description of Rear Panel. . . . . . . . . . . . . . . . 7
Remote Control Illustration . . . . . . . . . . . . . . 7
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 8
Service Information . . . . . . . . . . . . . . . . . . 8-9
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Your Responsibilites . . . . . . . . . . . . . . . . . . . . 9
GFP-715 Specifications . . . . . . . . . . . . . . . . 10
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THE FOLLOWING PRECAUTIONS AND SAFETY INSTRUCTIONS
ARE REQUIREMENTS OF UL AND CSA SAFETY REGULATIONS
Warning: To reduce the risk of fire or electric shock, do
not expose this unit to rain or moisture.
ATTENTION
POUR PREVENIR LES CHOCS ELECTRIQUES NE PAS UTILISER CETTE FICHE
POLARISEE AVEC UN PROLONGATEUR, UNE PRISE CE COURANT OU UNE
AUTRE SORTIE CE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES
A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH
AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE
BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
The graphic symbol of a lightning flash with an
arrow point within a triangle signifies that there
is dangerous voltage within the unit and it poses
a hazard to anyone removing the cover to gain
access to the interior of the unit. OnIy qualified
service personnel should make any such attempt.
CAUTION POWER LINES
Any outdoor antenna must be located away from all power lines.
OUTDOOR ANTENNA GROUNDING
If an outside antenna is connected to your tuner or tuner/preamplifier,
be sure the antenna system is grounded so as to provide some protection
against voltage surges and built-up static charges. Section 810 of the
National Electrical Code, ANSI/NFPA No. 701984, provides information
with respect to proper grounding of the mast and supporting structure,
grounding of the lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna discharge unit, connection to
grounding electrodes, and requirements for the grounding electrode.
The graphic symbol of an exclamation point within
an equilateral triangle warns a user of the device
that it is necessary to refer to the instruction manual
and its warnings for proper operation of the unit.
Donotplacethisunitonanunstablecart, stand, tripod,
bracket, or table. The unit may fall, causing serious
injury to a child or adult, and serious damage to the
unit. Use only with a cart, stand, tripod, bracket, or
table recommended by the manufacturer or sold with
the unit. Any mounting of the device should follow the
manufacturer’sinstructions, andshoulduseamounting
accessory recommended by the manufacturer.
a. Use No.10 AWG (5.3 mm2) copper, No.8 AWG (8.4 mm2) aluminum, No.17
AWG (1.0 mm2) copper clad steel or bronze wire, or larger, as a ground wire.
b. Secure antenna lead-in and ground wires to house with stand-off
insulators spaced from 46 feet (1.221.83 m) apart.
Read all the safety and operating instructions before connecting or using
this unit.
c. Mount antenna discharge unit as close as possible to where lead-in enters
house.
Retain this notice and the owner’s manual for future reference.
All warnings on the unit and in its operating instructions should be adhered to.
All operating and use instructions should be followed.
d. Use jumper wire not smaller than No.6 AWG (13.3 mm2) copper, or the
equivalent, when a separate antenna grounding electrode is used. See NEC
Section 810-21 (j).
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE
INSTRUCTIONS CONTAINED INARTICLE 810. RADIOAND TELEVISION EQUIPMENT.
Do not use this unit near water. For example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near a swimming pool.
power lines
The unit should be installed so that its location or position does not interfere
with its proper ventilation. For example, it should not be situated on a
bed, sofa, rug, or similar surface that may block the ventilation openings;
or placed in a built-in installation, such as bookcase or cabinet, that may
impede the flow of air through its ventilation openings.
ground clamp
service entrance
conductors
standoff
insulators, b
The unit should be situated away from heat sources such as radiators, heat
registers, stoves, or other devices (including amplifiers) that produce heat.
mast
The unit should be connected to a power supply outlet only of the voltage
and frequency marked on its rear panel.
antenna
lead-in wire
service
The power supply cord should be routed so that it is not likely to be walked
on or pinched, especially near the plug, convenience receptacles, or where
the cord exits from the unit.
entrance
equipment
ground wire, a,b
antenna
ground clamps
discharge
unit, c
Clean unit only as recommended in its instruction manual.
to external antenna
terminals of radio receiver
The power supply cord of the unit should be unplugged from the wall outlet
when it is to be unused for a long period of time.
power service grounding
electrode system
(e.g. interior metal water pipe)
ground wire, a,b
ground clamps
Care should be taken so that objects do not fall, and liquids are not spilled,
into the enclosure through any openings.
bonding jumper, d
optional antenna grounding
electrode driven 8 feet (2.44 M) into
the earth if required by local codes.
This unit should be serviced by qualified service personnel when:
A. The power cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled, into the unit; or
C. The unit has been exposed to rain, or liquids of any kind; or
D. The unit does not appear to operate normally, or exhibits a marked
change in performance; or
NOTE TO CATV SYSTEM INSTALLER
This reminder is provided to call the CATV system installer’s attention to
Article 82022 of the National Electrical Code that provides guidelines for
proper grounding and, in particular, specifies that the cable ground shall
be connected to the grounding system of the building, as close to the
point of cable entry as practical.
E. The device has been dropped, or the enclosure damaged.
DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
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carton and all packing material as they The optimal perfomance of your new
are intended to reduce the possibility GFP-715 will ultimately depend on
of transportation damage should the the care with which you make the
preamplifier ever need to be shipped connections between the amplifier,
again. In the unlikely event damage preamplifier and loudspeakers. All
has occurred, notify your dealer input and output signal connections
immediately and request the name of should be made only with high quality,
the carrier so a written claim to cover low-loss, low capacitance cables. For
shipping damages can be initiated. The recommendations of the type and
right to a claim against a public carrier quality of interconnections that are
can be forfeited if the carrier is not best for your applications, consult with
notified promptly in writing and if the your ADCOM retailer.
Introduction
Congratulations on your decision to
purchasetheGFP-715stereopreamplifier.
Two channel audio is better than ever!
The new DVD Audio and SACD formats
can support a wider frequency spectrum
(100kHz) and greater dynamic range
(144dB) than conventional CD. The GPF-
715 is designed to capture all the fidelity
that high resolution audio has to offer,
with precision broadband components
and an ultra low noise floor. Equipped
with a processor loop, a tape loop and
a phono stage, this new ADCOM preamp
hasn’t forgotten about your legacy
components.Audition the GFP-715 paired
with an ADCOM power amp and DVD
player and rediscover the magic of two
channel. To realize the full potential of
your new stereo preamplifier, and before
making any connections to it, please
read these operating and installation
instructions thoroughly.
shipping carton and packing materials
are not available for inspection by
the carrier. Save all packing materials
until the claim has been settled.
Safety Information
There are no user serviceable parts
inside. Refer all servicing to qualified
service personnel.
Placing the GFP-715
The unit must be connected to a power
supply only of the type and voltage
specified on the rear panel. Connect
the component to the power outlet
only with the supplied power supply
cable or an exact equivalent. Do not
modify the supplied cable. Do not
defeat grounding and/or polarization
provisions. The cable should be
connected to a 3-pin polarized wall
outlet, matching the wide blade of the
plug to the wide slot of the receptacle.
Do not use extension cords. Do not
route the power cord where it will
be crushed, pinched, bent, exposed
to heat, or damaged in any way. Pay
particular attention to the power cord
Although the GFP-715 does not
generate much heat, it is good practice
to ensure the amplifier’s long-term,
trouble-free operation to provide
adequate ventilation for the unit.
Therefore, the GFP-715 should be kept
away from external sources of heat
such as radiators and hot-air ducts.
Key Features
We recommend that you exercise
care when placing components on top
of the GFP-715. If you are placing a
heat producing component (such as an
amplifier) on top of or below the GFP-
715, it is recommended that you allow
at least 3 inches vertical spacing for
proper airflow.
• Class A line level preamp
• high resolution audio bandwidth
• 4 audio inputs
• 1 phono input stage
• tape output w/ monitor function
• external processor loop
• bass, treble, and balance adjust
• front panel headphone input
• remote control
If your system includes the use of the at the plug and where it exits the back
phono input, you may find that placing of the unit. The power cord should be
components above or under the GFP-715 unplugged from the wall outlet if the
mayinducehum, causedbytheproximity unit is to be left unused for a long
of their power transformer to the phono period of time. Immediately stop using
cables or input jacks. If this should occur, the component and have it inspected
moving the components will usually help and/or serviced by a qualified service
Unpacking the GFP-715
Before your new ADCOM preamplifier
left our factory, it was carefully
inspected for physical imperfections
reduce the hum.
If you observe these recommendations, • the power supply cord or plug has
the GFP-715 will perform reliably been damaged;
in any reasonable environment. You • objects have fallen or liquid has
should also pay attention to such been spilled into the unit;
agency if:
and
tested
for
all
electrical
parameters as a routine part of
ADCOM’s systematic quality control.
This, along with full operational and
mechanical testing, should ensure a
product flawless in both appearance
and performance. After you have
unpacked the GTP-715, inspect it for
physical damage. Save the shipping
normal considerations as protection • the unit has been exposed to rain;
from excessive dust and moisture. • the unit shows signs of improper
Occasional vacuuming of accumulated
operation; or
dust on the chassis panels and around • the unit has been dropped or
the ventilating slots should be all that
is required.
damaged in any way.
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[ ]
[ ]
4 Bass and Treble Knobs 7 Tone In Button
Description of Unit:
Front Panel
The bass and treble knobs contol the This button is used to engage the bass
bass and treble frequencies by increasing and treble controls. In the out position,
or decreasing levels.
the tone controls will have no effect.
[ ]
1 On/Off Power Switch
The GFP-715 is turned on by pressing
either the remote control power button
or toggling the front panel power
switch. When on, the LED indicator in
the button will illuminate.
[ ]
8 Mono Button
[ ]
5 Balance Knob
The mono setting combines both left
and right channels for a monaural input
signal or where speaker placement does
not accommodate stereo playback.
Balance control provides adjustment for
greater accuracy of stereo imaging.
[ ]
6 Source Selections
[ ]
2 Headphones Jack
These five buttons select the source you
desire for listening. When you select
CD, tuner, phono or video/aux, these
signals are routed to the tape output
for recording the selected source. Tape
playback is accessed by pressing the
tape button. The presence of signal at
the tape outputs can be confirmed by
pressing the tape monitor button. The
five source select buttons are also on the
remote control.
[ ]
9 Tape Monitor
Headphonesmaybeusedthroughtheuse
of the phones output jack on the front
pael. This jack will accept a standard ꢀ”
stereo headphone plug.
Confirms that signals are present at tape
outputs. If a three-head tape recorder
is connected, activating this circuit
will allow direct monitoring from the
recording. See tape recorder manual for
details.
[ ]
3 IR Sensor
This lens protects the infrared reciever
which receives commands from the
remote control. Note: the pathway
between the lens and remote control
must be free of obstruction for the
remote control to operate the GFP-715.
[ ]
10 External Processor
Selects an exteranl audio precessor, i.e.,
surround sound processor or equalizer.
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connection of an external processor or replace with the identical type and
an equalizer. Consult the manual of your rating fuse for continued protection. See
[ ]
11 Mute Button
Pressing this button mutes the main
outputs. To turn the mute feature off,
press the mute button again. Note:
turning the volume knob on the front
panel will not deactivate the mute
feature.
external processor.
“Troubleshooting” for more information.
[ ]
15 Stereo Outputs
[ ]
16 AC Input
Bypass Output: The signal path from
this output does not include the tone
control amplifiers used by the GFP-715.
In addition, the bypass output is a direct
coupled connection that bypasses the
output capacitor present in the main
signal path.
Use the provided standard IECAC cord to
provide power to the unit. The plug is a
polarized type, for continued electrical
safety observe proper polariztion at
main outlet and do not modify plug in
any way.
[ ]
12 Volume Knob
The front panel volume control knob is
motorized. It may be adjusted either
by hand or with the volume buttons on
the remote control. The volume knob’s
illuminated LED always indicates the
volume level.
Main Output: A line level stereo output
that connects to the amplifier’s inputs.
Remote Control
Thesuppliedremote
Both outputs can be used at the same
time to accommodate a second amplifier
for multi-room operation.
control,
here,
pictured
duplicates
CD
power
the frequently used
front panel controls.
Two AAA batteries
are included. The
model number of
the remote control
is GFP-710RC.
Description of Unit:
Rear Panel
tuner
tape
volume
[ ]
16 Infrared Repeaters
Connect an infrared repeater, such as
the ADCOM IRA-500II, to control other
remote controlled components via the
remote sensor extension.
video/aux phono
[ ]
13 GND Ground Post
To reduce the chance for hum connect
the turntable ground lead to this
attachment point.
ext. proc mute
[ ]
17 Remote Sensor
Extension Input
Expand the remote control capabilities
of the GFP-715 by using an ADCOM XR-
500II via an external room or zone.
[ ]
14 Stereo Inputs
Connect the various outputs from each
signal source to these stereo inputs.
Tape In/Out: Connect the Tape In to
the Play or Output connection of the
recording device. Connect Tape Out
to the Record or Input jacks of the
recording device.
[ ]
18 AC Fuse Holder
This unit is protected from electrical
overloads that may be sent to the unit
from a surge or lighting strike though the
use of a fuse. If the fuse blows always
External Processor: The processor
in/out connectors allow for convenient
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SYMPTOM
POSSIBLE REASON
POSSIBLE SOLUTION
Power LED does not
AC Power Cord(s) not plugged in.
Plug in AC Power Cord(s).
glow. No sound
AC Fuse(s) failed.
Replace AC Fuse(s).
Transformer thermal protection engaged.
I2V DC triggering malfunctioning.
Wait until unit cools down. It will reset.
Reset power switch manually. Check
connection of 12V DC trigger at source.
Make sure whole system is on.
Verify all connections on rear of amp.
Power LED glows,
but no sound
Preamp or source unit is not on.
Connections in rear of amp are loose.
One channel not
producing sound
INPUT(s) or OUTPUT(s) connector
disconnected or loose.
Verify both connections on that channel.
Speaker disconnected.
Verify connection at speaker.
Internal protection engaged.
Bring to Dealer or Service Center.
If Cable TV is present (see Note 1).
If Cable TV is not present (see Note 2).
Try different source (tuner, tape, etc.)
and/or different RCA cable.
Hum from all speakers
at any volume
Ground loop (difference in ground voltages
between components).
Hum from all speakers
(hum goes up or
down with volume)
Hum from the amplifier
itself
Problem with source unit (CD, tape, etc.),
or RCA cable connecting that source unit
to the preamp.
Some major appliance, dimmer, halogen or
fluorescent light is creating interference.
Make sure all appliances, dimmers and
suspect lights are off.
or the first component the cable is connected to (i.e. the
cable box, or VCR). If the hum is no longer present, you
must insert a “75Ω ground loop isolator” before reconnect-
ing the line. You should check with your ADCOM dealer to
obtain one. If the “75Ω ground loop isolator” works only
partially or not at all, then please read note 2 to complete
the troubleshooting procedure.
Troubleshooting
Use the troubleshooting notes above to solve common
situations that don’t require professional attention. If the
steps stated in possible solution do not resolve your prob-
lem, then please contact your ADCOM dealer or call the
ADCOM customer service department. Any problems not
covered here should be brought to the attention of your
ADCOM dealer or ADCOM customer service department.
Note 2: Make sure that the power amplifier is at least 6”
from processor or other equipment using microprocessors.
Usually putting another component between them is suf-
ficient to minimize the hum. If this does not reduce the
hum, turn the system off and disconnect all Inputs from
the amplifier. If the hum still persists, then your dealer or
service center must examine the unit/system. If the hum
disappears, try another set of RCA cables. Connect one RCA
cable at a time to see if one specific cable is responsible.
If any or all cables cause the hum to appear, then the unit
should be evaluated for proper operation by your dealer or
authorized service center. Please see our website or call us
for a list of authorized service centers in your area.
A special note on “hum:” When there is a low-volume
“hum” audible throughout your speakers, even with the
main volume turned all the way down, you have a com-
mon phenomenon known as a “ground loop.” A ground loop
is basically a difference in ground voltages between two
or more components which are connected electrically and
which creates multiple current paths where there must only
be one. This difference in potentials creates a 60Hz low-
level sound (approximately a low A), that seems to “hum.”
It can be caused by adding new components to your system,
but that does not imply there is anything electrically wrong
with any new component. With the advent of audio/video
and home theater systems, the problem has become com-
monplace. Generally, the cause is the Cable-TV incoming
signal line. This new incoming line may add an additional
ground at a different potential to the AC line ground of
your other equipment (refer to note I and 2, to trouble-
shoot a hum problem).
Servicing
ADCOM has a technical service department to answer
questions pertinent to the installation and operation of your
unit. In the event of difficulty, please contact us for prompt
advice. If your problem cannot be resolved through our
combined efforts, we may refer you to an authorized repair
agency, or authorize return of the unit to our factory. To aid
us in directing you to a convenient service center, it would
be helpful if you indicate which major city is accessible to
your home.
Note 1: Cable TV systems can sometimes contribute to
ground loop problems which cause “hum.” To determine
if your cable system is the contributing factor, disconnect
the Cable-TV incoming signal line (round, 75Ω) at the wall,
8 | ADCOM GFP-715 Owner’s Manual
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of original purchase from an ADCOM authorized dealer.
During this period, ADCOM will repair or replace a defective
product or part, at our option, with a new or refurbished
product or part without charge to you, as long as you follow
the procedures listed below.
Please address mail inquires to:
ADCOM Service
8541 East Anderson Drive
Scottsdale, Arizona 85255 USA
Phone, Fax or Email inquires to:
All implied warranties, including implied warranties of
merchantability and fitness for a particular purpose are
limited in duration to the duration of the warranty period.
Voice: (480) 607-2277 or Fax: (480) 348-9876
Monday through Friday, 8:00 AM to 4:00 PM MST
Email: [email protected]
This warranty excludes all incidental and consequential
damages, unless contravened by state law. This warranty
gives you specific rights and you may have other rights
which vary from state to state.
For fax inquires, please include a return fax number for the
reply. When calling or writing about your ADCOM product,
be sure to note and refer to its serial number as well as
the date of purchase and the dealer from whom it was
purchased. In any communications to us, please include
a daytime phone number where we may reach you. In
the event the unit must be returned to our factory for
service, you will be instructed on the proper procedure
when you call or write for a return authorization. Under no
circumstances should your unit be shipped to our factory
without prior authorization, or packed in other than its
original carton and fillers.
No person, agent, distributor, dealer, or company is
authorized to change, modify or extend the terms of these
warranties in any manner whatsoever.
Your Responsibilities
The above warranties are subject to the following conditions:
(1) You must retain and present your dated invoice or bill
of sale to provide proof of original purchase from an ADCOM
Authorized Dealer and coverage under the warranty period.
If the original shipping carton and its fillers have been lost,
discarded, or damaged, a duplicate carton may be obtained
from our service department for a nominal charge.
(2) You must notify us within ten (10) days after you
discover a defective product or part.
(3) All warranty servicing of this product must be done by
ADCOM or an authorized ADCOM Service Center.
Always ship prepaid via United Parcel Service (UPS) or other
approved carrier. Do not ship via parcel post, since the
packing was not designed to withstand rough parcel post
handling. Improper shipment of the product will void your
warranty coverage.
(4) This warranty is only valid if this product has been
purchased and used in the United States. Warranty coverage
for products purchased and used outside of the United
States is provided by local ADCOM authorized distributors.
Warranty
(5) Charges by third parties for set-up, installation,
adjustments, shipment, insurance, and other charges are
not covered by this warranty.
ADCOM, a division of Klein Technology Group, LLC, makes
the following limited warranties. These limited warranties
extend to the original purchaser or any person receiving this
product as a gift from the original purchaser and to no other
purchaser or transferee. There is no warranty provided by
ADCOM for products purchased from unauthorized outlets
or dealers or from previous owners.
(6) This warranty extends only to defects in material or
workmanship as limited above and does not extend to any
product or part which has been lost or discarded by you, or
to damage to products or parts caused by misuse, accident,
Acts of God such as lightning or fluctuations in electrical
power, improper installation, improper maintenance or use in
violation of instructions provided in this Owner’s Manual, or to
products which have been altered or modified. This warranty
does not extend to products which have had the serial number
removed, altered, defaced, or rendered illegible.
LimitedFive Year Warranty (Home, Non-Commercial Use Only)
ADCOM warrants this product against defects in materials or
workmanship for a period of five (5) years after the date of
original retail purchase from an ADCOM authorized dealer.
During this period, ADCOM will repair or replace a defective
product or part, at our option, with a new or refurbished
product or part without charge to you, as long as you follow
the procedures listed below.
(7) Physically damaged products are not covered by this
warranty and will be returned as received without repair.
Limited Ninety (90) Day Warranty (Commercial Use Only)
ADCOM warrants this product against defects in materials or
workmanship for a period of ninety (90) days after the date
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GFP-715 Specifications
Output Impedance
Bypass/Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Ohms
Tape Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475 Ohms
Output Level
Bypass / Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 Vrms
Output Level (Maximum)
Bypass / Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.0 Vrms
Frequency Response (±0.5dB)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Hz-100kHz
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Hz-50KHz
THD + Noise (@ rated output 20Hz - 20kHz)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.005%
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.005%
Intermodulation Distortion (SMPTE @ rated output)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.005%
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.005%
Signal to Noise (@ rated output - A weighted)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥100dB
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥95dB
Input Impedance
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25KΩ
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47kΩ
Input Sensitivity (@ rated output)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 mV
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4mV
RIAA accuracy (20Hz - 20kHz)
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 0.25dB
Tone Controls
Bass (20Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 11.5dB
Treble (20kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 8.5dB
General
Power (available in 230VAC by special order) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115VAC—50/6OHz
Chassis Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3” (76.2mm) x 17” (432mm) x 11.5” (292.1mm)
Maximum Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5” (88.9mm) x 17” (432mm) x 12.5” (317.5mm)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 lbs. (5.5kg)
Weight, Packed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 lbs. (6.8kg)
10 | ADCOM GFP-715 Owner’s Manual
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Installer’s Notes
ADCOM GFP-715 Owner’s Manual | 11
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