the
art components that are easy to use at an affordable price. In doing this, Adcom has created a
-
ponents and offering them at affordable prices, Adcom has enabled more people to enjoy their
said it best: “No
-
AWARD WINNING
Innovation is our stronghold, and our numerous awards year after year prove that we’re never
art digital processors, Adcom components consistently impress even the most demanding
ences. Adcom components have won over 25 Product of the Year and Special Recognition
Consumer Electronics Show
ENGINEERING PASSION
c-
ture, but to also deliver the greatest possible value. It is our engineers’ passion for perfection
that has enabled our components to be judged the equivalent of others costing two, three, or
d-
-
m-
duced or
PERFORMANCE AND VALUE
ABOUT ADCOM
In the world of high performance electronics, Adcom has done the impossible: make state of
revolution in the world of consumer electronics. By creating some of the most renowned com
favorite music and movies at top performance levels. Perhaps Audio Magazine
competing company I know can provide a similar balance of sound quality, power and afford
ability.”
satisfied to rest on our reputation. From our legendary high current amplifiers to our state-ofthe
audi
citations from Audio Video International, 3 Diapason D’Or Awards, 7
Design and Engineering Awards, and have appeared on Stereophile’s “Recommended Components” lists over 70 times since 1988. A reputation worth its weight in gold.
Every Adcom component is not only designed to reproduce the highest quality sound and pi
even five times as much. Our engineering team consistently strives to develop and design pro
ucts that will exceed your expectations. Our goal at Adcom is to let more consumers hear high
end quality sound and see high-end video without paying high-end prices.
All Adcom components are the result of a long-standing dedication to innovation, quality, si
plicity and value. Adcom, we have the power, and now so do you.
This document is subject to change. Please check our website for
the most up-to-date version.
REV 2.1, 4/2011
ADCOM is a registered trademark of ADCOM LLC
Copyright © 2011 ADCOM LLC. All rights reserved. No part of this manual may be repro
electronically transmitted without the express written consent of ADCOM LLC.
THE FOLLOWING
PRECAUTIONS AND SAFETY INSTRUCTIONS
Warning: To reduce the risk of fire or electric shock, do
injury to a child or adult, and serious damage to the unit.
c-
ommended by the manufacturer or sold with the unit. Any
mounting of the device should follow the manufacturer’s
m-
Read all
the safety and operating instructions before connecting or using
Retain this notice and the owner’s manual for future reference.
All warnings on the unit and in its operating instructions should be
All operating and use instructi
ons should be followed.
Do not use this unit near water. For example, near a bathtub, washbowl,
The unit should be installed so that its location or position does not inte
r-
The unit should be situated away from heat sources such as radiators, heat
The unit should be connected to a power supply outlet only of the voltage
The power supply cord should be routed so that it is not likely to be
Clean unit only as recommended in its i
nstruction manual.
The power supply cord of the unit should be unplugged from the wall ou
t-
Care should be taken so that objects do not fall, and liquids are not
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 an
y kind; or
D. The unit does not appear to operate normally, or exhibits a
E. The device has been dropped, or the enclosure damaged.
D
O NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF.
-
ATTENTION
POUR PREVENIR LES CHOCS ELECTRIQUES NE PAS UTILISER CETTE FICHE
AUTRE SORTIE CE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES
CAUTION
CAUTION POWER LINES
Any outdoor antenna must be located away from
all power lines.
OUTDOOR ANTENNA GROUNDING
If an outside antenna is connected
Use No.10 AWG (5.3 mm
2
) copper, No.8 AWG (8.4 mm
2
) alum
i
num, No.17
Mount antenna discharge unit as close as possible to where lead
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE
NOTE TO CATV SYSTEM INSTALLER
This reminder is provided to call the
lar,
ARE REQUIREMENTS OF UL AND CSA SAFETY REGULATIONS
not expose this unit to rain or moisture.
Use only with a cart, stand, tripod, bracket, or table re
instructions, and should use a mounting accessory reco
mended by the manufacturer.
this unit.
adhered to.
POLARISEE AVEC UN PROLONGATEUR, UNE PRISE CE COURANT OU UNE
A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.
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.
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.
AWG (1.0 mm2) copper clad steel or bronze wire, or larger, as a ground
wire.
Secure antenna lead-in and ground wires to house with stand-off insulators spaced from 46 feet (1.221.83 m) apart.
-in enters
house.
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).
kitchen sink, laundry tub, in a wet basement, or near a swimming pool.
fere 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.
registers, stoves, or other devices (including amplifiers) that produce
heat.
and frequency marked on its rear panel.
walked on or pinched, especially near the plug, convenience receptacles,
or where the cord exits from the unit.
let when it is to be unused for a long period of time.
spilled, into the enclosure through any openings.
INSTRUCTIONS CONTAINED IN ARTICLE 810. RADIO AND TELEVISION
EQUIPMENT.
the earth if required by local codes.
marked change in performance; or
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CATV system installer’s attention to Article 82022 of the National Electrical Code that provides guidelines for proper grounding and, in particu
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.
815 is designed
815 paired with an ADCOM power amp
ly and request the name of the carrier
damages can be initiated. The right to
a claim against a public carrier can be
promptly in writing and if the shipping
available for inspection by the carrier.
erate much heat, it is good practice to
We recommend that you exercise care
815, it is recommended that you allow
jacks. If this should occur, moving the
815 will ultimately depend on the
put and
ot route the power cord where it will
be crushed, pinched, bent, exposed to
particular attention to the power cord
for a long period of time. Immediately
If you observe these recommendations
Dust on the surface of the cabinet can
y cord or plug has been
tation damage should the preamplifier
ever need to be shipped again.
Introduction
Congratulations on your decision to
purchase the GFP-815 stereo preamplifier. 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 GPFto capture all the fidelity that high
resolution audio has to offer, with
precision broadband components and
an ultra low noise floor. Equipped
with a phono stage, this new ADCOM
preamp hasn’t forgotten about your
legacy components. Audition the GFP-
and CD / 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.
Key Features
• Class A line level preamp
• High resolution audio bandwidth
• 7 source audio inputs
• 2 mp3 input front and rear panel
• Phono input stage (MM & MC)
• Main & Record outputs
• External remote in and loop
• Bass, treble, and balance adjust
• Front panel headphone input
• Remote control and rs-232 control
Unpacking the GFP-815
Before your new ADCOM preamplifier
left our factory, it was carefully in-
spected for physical imperfections
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-815, inspect it for physical damage. Save the shipping carton and all
packing material as they are intended
to reduce the possibility of transpor-
In the unlikely event damage has occurred, notify your dealer immediate-
so a written claim to cover shipping
forfeited if the carrier is not notified
carton and packing materials are not
Save all packing materials until the
claim has been settled.
Placing the GFP-815
Although the GFP-815 does not gen-
ensure the amplifier’s long-term,
trouble-free operation to provide adequate ventilation for the unit. Therefore, the GFP-815 should be kept
away from external sources of heat
such as radiators and hot-air ducts.
when placing components on top of
the GFP-815. If you are placing a heat
producing component (such as an amplifier) on top of or below the GFP-
at least 3 inches vertical spacing for
proper airflow.
If your system includes the use of the
phono input, you may find that placing components above or under the
GFP-815 may induce hum, caused by
the proximity of their power transformer to the phono cables or input
components will usually help reduce
the hum.
the GFP-815 will perform reliably in
any reasonable environment.
You should also pay attention to such
normal considerations as protection
from excessive dust and moisture.
be easily and safely removed with a
duster such as made by Swiffer™. Finger prints can be removed with a soft
cloth dampened with a mild nonammonia cleaner.
The optimal performance of your new
GFPcare with which you make the connections between the amplifier, preamplifier and loudspeakers. All in
output signal connections should be
made only with high quality, low-loss,
low capacitance cables. For recommendations of the type and quality of
interconnections that are best for
your applications, consult with your
ADCOM retailer.
Safety Information
There are no user serviceable parts
inside. Refer all servicing to qualified
service personnel.
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
n
heat, or damaged in any way. Pay
at the plug and where it exits the
back of the unit. The power cord
should be unplugged from the wall
outlet if the unit is to be left unused
stop using the component and have it
inspected and/or serviced by a qualified service agency if:
. The power suppl
damaged;
. Objects have fallen on or liquid has
been spilled into the unit;
. The unit has been exposed to rain;
. The unit shows signs of improper
operation; or
. The unit has been dropped or damaged
of Unit: Front Panel
in the
⁄4” stereo headphone plug.
Treble Knobs
Description
[1] Standby button
Toggles the GFP-815 in and out of
Standby mode. When in standby
mode, the GFP-815 is activated by
pressing either the remote control
power button or toggling the front
panel power switch. When the GFR815 is active, the LED indicator
Standby button will illuminate.
[2] IR Sensor
This lens protects the infrared receiver 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-815.
[3] Headphones Jack
Headphones may be used through the
use of the phones output jack on the
front panel. This jack will accept a
standard 1
[4-7] Source Selections
These seven buttons select the source
you desire for listening. When you select phono(1), 2, 3, 4, 5, 6 or mp3(7),
the selected source is also routed to
the record outputs. The seven source
select buttons are also available on
the remote control.
[8] Tone Button
This button is used to engage the bass
and treble controls. In the out position, the tone controls will have no
effect.
[9] MP3 IN Jacks
Mp3 devices can be connected to the
mp3 input jack on the front panel(3.5mm) or the mp3 RCA jacks on
the back panel.
[10] Bass &
The bass and treble knobs control the
bass and treble frequencies by increasing or decreasing levels.
[11] Balance Knob
Balance control provides adjustment
for greater accuracy of stereo imaging.
[12] 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.
[13] Volume Knob
nect
can
let and do not
trol, pictured
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 point
dot on the volume knob indicates the
volume level.
Description of Unit:
[18] Ext Remote
A remote infrared sensor can be connected here.
Voltage switch (Bottom)
Sets the GFP-815 voltage to 120V
(U.S. standard) or 230V (international standard).
Main power switch
Switches the GFP-815’s main power on and off.
Rear Panel
[14] GND Ground Post
To reduce the chance for hum con
the turntable ground lead to this attachment point.
[15] Source Inputs
Source 1~7 inputs (R/L) Connects to
the line outputs of a CD player or
other analog audio source component. Up to seven analog audio
source devices can be connected.
[16] Stereo Outputs
Rec Output: Connect rec output to
the Record or Input jacks of a recording device.
Main Output: A line level stereo output that connects to your amplifier’s
inputs.
[17] RS232 Control
The Adcom GFP-815 can be controlled via the serial RS-232 port.
The serial port can be connected to
a system controller, PC or ‘dumb
terminal’ via a straight through
standard 9-pin(DB9) serial port cable
(MALE on one end and FEMALE on the
other end).
[19] Auto turn on
A trigger, if properly hooked-up,
prove to be very convenient.
-in input jack use the 12V DC or AC
trigger in conjunction with another
device to turn the GFR-815 on and
off. The trigger output from the other device should go to the trigger
input on the rear panel of the GFP-
815.
-loop output jack is provided to
allow trigger control of additional
components in your system.
[20] AC Input
Connects the GFP-815 to a standard
electrical outlet using the supplied
power cord. Use the provided standard IEC AC cord to provide power to
the unit. The plug is a polarized type.
for electrical safety, observe proper
polarization at main out
modify plug in any way. If it is ever
necessary, replace the fuse with a
fuse of identical type and rating for
continued protection. See “Troubleshooting” for more information.
Input 1 select
Sets the input level for input
source 1 to mm or mc for phono
cartridge input or line for other
analog devices.
Remote Control
The supplied remote con
here, duplicates the frequently used
front panel controls. Two AAA batteries are included. The model number of the remote control is RC815.
lease see our website
ry.
cable system is the contributing factor, disconnect the
mon
SYMPTOM POSSIBLE REASON POSSIBLE SOLUTION
Power LED does not
glow. No sound
Power LED glows, but no
sound
One channel not producing sound
Hum from all speakers
at any volume
Hum from all speakers
(hum goes up or down
with volume)
Hum from the amplifier
itself
AC Power Cord(s) not plugged in. AC
Fuse(s) failed. Transformer thermal protection engaged. I2V DC triggering malfunctioning.
Preamp or source unit is not on. Connections in rear of amp are loose.
INPUT(s) or OUTPUT(s) connector disconnected or loose. Speaker disconnected.
Internal protection engaged.
Ground loop (difference in ground voltages
between components).
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.
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 problem, 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.
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
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 be
a “hum.”
Hum 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 commonplace. Generally, the cause is the CableTV 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 troubleshoot a hum problem).
Note 1: Cable TV systems can sometimes contribute to
ground loop problems which cause “hum.” To determine if
your
Plug in AC Power Cord(s). Replace AC
Fuse(s). 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.
Verify both connections on that channel.
Verify connection at speaker. 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.
Make sure all appliances, dimmers and
suspect lights are off.
Cable-TV incoming signal line (round, 75Ω) at the wall,
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 reconnecting 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.
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 sufficient 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. P
for a list of authorized service centers in your area.
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
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 facto
ADCOM LLC
Limited Two Year Warranty
Your Responsibilities
ty period.
(5) Physical damage to the product
from any cause
is
not
PO Box 54087
Phoenix, AZ 85032
Phone, Fax or Email inquiries to:
Voice: (480) 607-2277
Fax: (623) 505-9523
Monday through Friday, 9:00 AM to 5:00 PM MST
Email: service@adcom-usa.com
For fax inquiries, 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 needs to be sent to a service center,
you will be instructed on the proper procedure when you
call or write for a return authorization. Under no circum-
stances should your unit be shipped to our factory without prior authorization, or packed in other than its original carton and fillers.
Always ship prepaid via FEDEX or UPS. Do not ship via Parcel Post, since the packing was not designed to withstand
rough Parcel Post handling. Improper packaging and shipment of the product will void your warranty coverage.
(Home, Non-Commercial Use Only)
Briefly, ADCOM warrants this product against defects in
materials or workmanship for a period of two (2) 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. Consult the warranty document enclosed with the
product or our website for the complete terms and conditions of the warranty.
Limited Ninety (90) Day Warranty
(Commercial Use Only)
Briefly, ADCOM warrants this product against defects in
materials or workmanship for a period of ninety (90) days
after the date of original retail purchase from an ADCOM
authorized dealer. Consult the warranty document enclosed with the product or our website for the complete
terms and conditions of the warranty.
No person, agent, distributor, dealer, or company is authorized to change, modify or extend the terms of ADCOM
warranties in any manner whatsoever.
Warranty – USA & Canada
This warranty is only valid if this product was purchased
and used in the United States or Canada. Warranty coverage for products purchased and/or used outside of the
United States and/or Canada is provided by local ADCOM
authorized dealers and distributors in the country where
the product was sold. Consult your local dealer or distributor about the terms of your warranty.
ADCOM 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 sellers, dealers or from
previous owners.
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 during the warran-
(2) All warranty servicing of this product must be done by
an authorized ADCOM Service Center.
(3) Charges by third parties for set-up, installation, deinstallation, adjustments, shipment, insurance, and other
charges are not covered by this warranty.
(4) 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, pets, 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.
covered by this warranty and the product will be returned
as received without repair.
GFP
-
815 Specifications
1.2 Vrms
282mVrms
0.1dB
0.15%
31KΩ
MC . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . .
. . . . . . 0.5mV
General
Output Level
Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rec Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L/R Output Difference
Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Level (Maximum)
THD at 0.1% Main Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.0 Vrms
Frequency Response (-3dB Line volume at max)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Hz-100kHz
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hz-80KHz
THD + Noise (@ rated output 20Hz - 20kHz)
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.005%
MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 0.03%
MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal to Noise (80K Filter JIS-A
High Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥98dB
MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥64dB
MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥55dB
Input Impedance
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130KΩ
Line 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31KΩ
MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30KΩ
Input Sensitivity (@ rated output)
Line 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300mV
MP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mV
MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2mV
RIAA accuracy (20Hz - 20kHz)
Phono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 0.5dB
Tone Controls
Bass (100Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 8dB
Treble (10kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 9dB
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120VAC- 230VAC —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)
INTRODUCTION
in serial port cable (MALE on one end
GFP-815 Serial Port
Command Set
The Adcom GFP-815 can be controlled via the serial RS-232 port. The serial port can be connected to a system controller, PC or ‘dumb terminal’ via a straight-through standard 9-p
and FEMALE on the other end). When using a PC, a terminal emulator program (e.g. HyperTerminal or ProComm), can be used to control the GFP-815.
The communications parameters should be set as follows:
9600 baud, 8 data bits, no parity, 1 stop bit and Flow Control: Hardware
GFP-815 COMMAND SET
COMMAND String Hexadecimal String ASCII
POWER ON 57,20,31,20,31,20,32<CR> W 1 1 2<CR>
POWER OFF 57,20,31,20,31,20,31<CR> W 1 1 1<CR>
POWER TOGGLE 57,20,31,20,31,20,33<CR> W 1 1 3<CR>
VOLUME UP 57,20,31,20,39,20,31<CR> W 1 9 1<CR>
VOLUME DOWN 57,20,31,20,39,20,32<CR> W 1 9 2<CR>
MUTE ON 57,20,31,20,31,30,20,32<CR> W 1 10 2<CR>
MUTE OFF 57,20,31,20,31,30,20,31<CR> W 1 10 1<CR>
MUTE TOGGLE 57,20,31,20,31,30,20,33<CR> W 1 10 3<CR>
POLARITY NORMAL (0) 57,20,31,20,32,20,31,33<CR> W 1 2 13<CR>
POLARITY INVERT (180) 57,20,31,20,32,20,31,34<CR> W 1 2 14<CR>
POLARITY TOGGLE 57,20,31,20,32,20,31,35<CR> W 1 2 15<CR>
TRIGER ON 57,20,31,20,33,20,31<CR> W 1 3 1<CR>
TRIGER OFF 57,20,31,20,33,20,32<CR> W 1 3 2<CR>
PHONO (INPUT 1) 57,20,31,20,32,20,36<CR> W 1 2 6<CR>
INPUT 2 57,20,31,20,32,20,37<CR> W 1 2 7<CR>
INPUT 3 57,20,31,20,32,20,38<CR> W 1 2 8<CR>
INPUT 4 57,20,31,20,32,20,38<CR> W 1 2 9<CR>
INPUT 5 57,20,31,20,32,20,31,30<CR> W 1 2 10<CR>
INPUT 6 57,20,31,20,32,20,31,31<CR> W 1 2 11<CR>
MP3 (INPUT 7) 57,20,31,20,32,20,31,32<CR> W 1 2 12<CR>
NEXT INPUT 57,20,31,20,32,20,34<CR> W 1 2 4<CR>
PREVIOUS INPUT 57,20,31,20,32,20,35<CR> W 1 2 5<CR>
TONE ON 57,20,31,20,34,20,31<CR> W 1 4 1<CR>
TONE OFF 57,20,31,20,34,20,32<CR> W 1 4 2<CR>
Please Note: ‘’<CR>’’ stands for Carriage Return, the Hex Code is ‘’0D’’. A
space in Hex is ’’20’’, a space in ASCII is just a blank space (as shown above).
ADCOM llc
PO Box 54087
Phoenix, AZ 85078
PH: (480) 607-2277
Email: info@adcom-usa.com
Web: www.adcom-usa.com
Web: www.adcom.com
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