cec AMP3800 User manual

AMP3800
Control / Power Amplier
Owner's Manual

Control / Power Amplier AMP3800
2
Contents
Thank you for purchasing AMP3800.
Please read through and refer to this Owner’s manual to use your AMP3800
safely and adequately. It is recommended that you keep the unit’s packaging
available for future transportation needs.
Features
●AMP3800 is a power amplier with input control, developed for the highest
pure sound experience with a design philosophy of minimizing the signal
path. It has the newest LEF (Load Effect Free) circuitry avoiding quality
degradations instead of correcting afterwards. LEF also provides pure
single-ended class-A operation with improved energy efciency and does
not require a sound altering global feedback loop. This results in the
successful combination of high power (2 x 64W / 8Ω) and highest quality
sound, widely unaffected by transistor characteristics.
●AMP3800 also features IGM (Intelligent Gain Management). This unique
volume control technology controls the amplifier’s gain itself without any
input signal dilution.
●AMP3800’s circuitry is fully balanced, from the input stage to the speaker
outputs. This minimizes noise and distortion and increases the speed and
resolution of the sound.
Introduction
●Introduction ………………………………………………………………… 2
●Features …………………………………………………………………… 2
●Important Safety Instructions …………………………………………… 3
●Handling Precautions …………………………………………………… 4
●Accessories………………………………………………………………… 6
●Front Panel Functions …………………………………………………… 7
●Rear Panel Functions …………………………………………………… 9
●Remote Control Unit …………………………………………………… 12
●Cautions regarding Handling ………………………………………… 14
●Maintenance …………………………………………………………… 14
●Troubleshooting ………………………………………………………… 15
●Service Contact Preparations ………………………………………… 16
●Specications …………………………………………………………… 16

AMP3800 User's Manual
3
Important Safety Instructios
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use the unit near water.
6) Clean only with a dry cloth.
7) Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8) Do not install the unit near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including ampliers) that produce heat.
9) (For USA, Canada: ) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades, with one blade wider than
another. A grounding type plug has two blades and a third grounding prong. The
wide blade or the third prong is provided for your safety. If the provided plug does
not fit your outlet, consult an electrician for replacement of the obsolete outlet.
(For European Countries: ) Do not defeat the safety purpose of the grounding-type
plug. This plug has two poles and a third grounding hole. The third hole is provided
for your safety. If the provided plug does not t your outlet, consult an electrician
for replacement of the obsolete outlet.
Caution: To reduce the risk of electric shock,
do not remove the cover or rear panel. It does
not contain any user-serviceable parts. Refer
servicing to qualied service personnel.
The lighting flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the use to potential shock hazards within
the product’s enclosure.
The exclamation point within an equilateral
triangle, is intended to notify the user to
the presence of important operating and
maintenance (servicing) instructions in the
accompanying documentation.
WARINIG: TO PREVENT FIRE OR SHOCK HAZARD, DO
NOT EXPOSE THE APPLIANCE TO RAIN OR MOISUTRE.

Control / Power Amplier AMP3800
4
10) Protect the unit’s power cord from being walked on or pinched, especially around
the plugs, convenience receptacles, and where it exists the unit’s casing.
11) Only use attachments/accessories specied by the manufacturer.
12) Only use the unit with a cart, stand, tripod, bracket, or table specied
by the manufacturer or sold with the unit. If using a cart, exercise caution
when moving the cart unit combination to avoid injury from it tipping over.
13) Unplug the unit during lighting storms or when leaving it unused for
extended periods of time.
14) Refer all servicing to qualied service personnel. Servicing is required
when the unit itself, its power-supply cord, or plug has been damaged in any way,
when liquids have been spilled onto the unit, when foreign objects have fallen into
the unit, when the unit has been exposed to rain or moisture, when the unit does not
operate normally, or when the unit has been dropped.
Caution
●Do not expose the unit to drips or splashes.
●Do not place any objects lled with liquids, such as vases, on the unit.
●Do not install the unit in a conned space, such as within a bookcase or similar piece
of furniture.
●Plug the AC power cord into an easily accessible AC wall outlet, so it can be quickly
unplugged in case of emergency.
●Do not remove the protective housing with a screwdriver.
●Use of controls or adjustments or performance of procedures other than those
specied herein may result in hazardous radiation exposure.
●If the unit seems to be malfunctioning, contact a qualied service station. Discontinue
use of any malfunctioning unit.
For CANADA:
AC POWER CORD CONNECTION
CAUTION:
TO PREVENT ELECTRIC SHOCK, MATCH THE BLADE WIDTH OF THE PLUG TO
THE SLOT WIDTH. THE PLUG MUST BE FULLY INSERTED TO THE SLOT.
1. Connecting Other Devices
Unplug AMP3800’s AC power cord from the outlet before connecting or disconnecting
other devices. Exercise caution when handling the AC power cord. When disconnecting
the AC cord from a socket, make sure you pull the plug, and not the cord itself.
2. Turning Power ON/OFF
Your system components should be turned ON/OFF in the following order to avoid
generating noise from your speakers and damaging the speakers themselves or other
devices:
Handling Precautions

AMP3800 User's Manual
5
Turning power ON: Turn AMP3800’s power ON at last, after turning ON the DA
converter or CD-player connected to AMP3800.
Turning power OFF: Turn AMP3800’s power OFF first, before turning OFF
connected units.
3. Handle with Care
Avoid exerting excessive force on the cabinet, the volume and selector knobs and
the push switches of AMP3800.
4. Avoid Electrostatic Discharge
Like all complex electronic devices, AMP3800 is sensitive to electrostatic discharge.
A discharge may cause malfunction or damage.
5. Installation
Use of an audio rack is recommended to maximize the sound quality and
performance of AMP3800. Installation and use of AMP3800 in the locations
described below may cause deterioration in sound quality or malfunctions.
●Locations exposed to direct sunlight, such as windowsills, and other exceptionally
warm locations, such as near heating appliances (surrounding temperature higher
than 35℃), or exceptionally cold locations (surrounding temperature lower than 5℃)
may prevent AMP3800 from functioning adequately.
●Damp locations exceeding 90% humidity may cause AMP3800’s metal parts to
rust, causing the unit to malfunction.
●Dusty locations may cause AMP3800 to malfunction. The accumulation of dust
outside and inside the unit may lower the performance of music signal amplication.
It may also cause contact failure of the switches and/or noise.
●Otherwise, avoid installing AMP3800 close to other transformers and electrical
motors, so as to prevent the pickup of induction hum. Also, avoid mounting
AMP3800 on surface that may be affected by vibration.
6. Avoid Lightning Strikes Damages
Disconnect the AC power cord from the AC outlet when there is a thunderstorm in
your vicinity.
7. Condensation
When AMP3800 has been brought into a warm room when the exterior temperature
is cold, or when the room temperature rises sharply from using a heater,
condensation may occur from both inside and outside the unit, hampering its
performance. If this happens, leave AMP3800 unused in the room for 1 to 2 hours
(depending on the amount of condensation), so as to bring the unit’s temperature
closer to the room temperature. The condensation should go away gradually.
8. Listening Etiquette
When adjusting the sound volume level, make sure you do not disturb other people
and your neighborhood.

Control / Power Amplier AMP3800
6
AMP3800
AMP3800
&)
Control / Power Amplifi
er
取扱説明書
Accessories
The packaging of AMP3800 should contain the following:
1. AMP3800 unit
2. AC Power Cord
3. Remote Control Unit
4. Two AAA Batteries for the remote control unit
5. Owner’s manual
NOTE: Keep the packaging available for future transportation needs.
The AC power cord is for use with AMP3800 exclusively, and should not be
used for other devices.

AMP3800 User's Manual
7
Front Panel Functions
❶ ❸ ❹ ❻❺❷
❶POWER button
Push the POWER button to turn AMP3800 ON respectively OFF.
When AMP3800 is turned ON the switch will light up with a blue color, and
the display will indicate the “MUTE” and blink “PLAY” during the unit is in
starting-up. Approximately 5 seconds later once the display changes to
indicate “PLAY” and a selected input “XLR, RCA1, RCA2, RCA3 or RCA4”,
AMP3800 is ready for use. “MUTE” will disappear.
Note: When you need to turn the power OFF and back ON again, wait for
least 20 seconds after turning the unit OFF to prevent malfunction.
Before turning AMP3800 ON or OFF, turn the volume knob to the
minimum to avoid a switching noise or sudden and big sound
from the speakers, which may result in damaging the speakers or
injuring your ears.
❷INPUT Selector
Turn the INPUT knob clockwise or counterclockwise to select an input from
XLR, RCA1, RCA2, RCA3 and RCA4). The display will indicate the selected
input.
Lower the volume before changing the input to avoid changing
noise, sudden big sound, or damage!

Control / Power Amplier AMP3800
8
❸REMOTE CONTROL RECEIVER
When operating the remote control, point it towards the REMOTE CONTROL
RECEIVER. Make sure nothing is blocking the AMP3800’s front panel, where
the REMOTE CONTROL RECEIVER is located.
❹REMOTE CONTROL INDICATOR
During receiving a valid remote control command, the REMOTE CONTROL
INDICATOR lights up with a blue color.
❺IGM VOLUME
Turn the VOLUME knob clockwise to increase the volume,
and counterclockwise to decrease the volume.
Note: Due to the IGM VOLUME property that controls the amplier gain itself,
there is still small sound from the speakers even at the minimum VOLUME
position. Stop the playback or press ❻MUTE Button to turn the sound off.
❻MUTE Button
Press the MUTE button whenever you need to temporarily turn the sound off.
The display will indicate “MUTE” as long as this function is active. Press the
MUTE button again or press the VOL+/VOL- buttons on the remote control to
cancel the MUTE mode.

AMP3800 User's Manual
9
Rear Panel Functions
3800
❶ ❸ ❹ ❻❺❷ ❶❸❹ ❷
Wires
Spade
Banana Plugs
❶RIGHT / LEFT SPEAKER
Power amplier output terminals for the right/left speakers. The red terminal
is for (+) the black one is for (-). Speakers with 4 ohm to 8 ohm impedance
can be connected by using banana plugs, spades or wires.
Note: Before connecting or disconnecting speakers turn the AMP3800’s
power OFF.

Control / Power Amplier AMP3800
10
Connect the interconnect cable in the correct direction
aligned for the signal path.
Connect the interconnect cable in the correct direction
aligned for the signale path
❷XLR input
Line in audio signal input jacks equipped with balanced XLR connectors. Use
interconnect XLR cables to connect the XLR input to an external source with
XLR line output, such as CD player, DVD player or DA converter. (Pinning:
1=Ground, 2=Hot, 3=Cold)
Note: Phono and digital sources cannot be connected to the XLR input.
❸RCA inputs (RCA1 / RCA2 / RCA3 / RCA4)
Line in audio signal input jacks equipped with unbalanced RCA connectors.
Use interconnect RCA cables to connect the RCA1/RCA2/RCA3/RCA4 inputs
to external sources with RCA line outputs, such as CD player, tuners or tape
decks.
Note: Phono and digital sources cannot be connected to RCA1, RCA2, RCA3
or RCA4.

AMP3800 User's Manual
11
Connect the interconnect cable in the correct direction
aligned for the signal path.
❹REC output
Line out audio signal output jacks equipped with unbalanced RCA
connectors. Use interconnect RCA cables to connect the REC. output
terminals to an external recording device with an RCA line input, such as CD
recorder, MD recorder or tape recorder.
❺HEATSINK
Make sure to leave enough space open around the HEATSINK for keeping
the air circulating and then keeping the temperature in the optimal range.
❻AC LINE
Connect the provided AC power cord to the AC LINE inlet.

Control / Power Amplier AMP3800
12
Remote Control Unit
❶
❷
❸
❹❺
❶MUTE button
Press the MUTE button to mute AMP3800. The display will indicate
“MUTE”. To cancel MUTE mode, press the MUTE button again.
❷VOL.+ button
Press the VOL.+ button to increase the volume level. Press and
hold the VOL.+ button to increase the volume level continuously.
Note: Beware of high volume settings.
❸VOL.- button
Press the VOL.- button to decrease the volume level. Press and
hold the VOL.- button to decrease the volume level continuously.
❹RCA1/RCA2/RCA3/RCA4 input button
Press the RAC1 / RCA2 / RCA3 / RCA4 button to select an
unbalanced INPUT source. The display will indicate the selected
INPUT.
❺XLR input button
Press the XLR button to select the balanced INPUT source. The
XLR indicator will be displayed.
NOTE: During receiving a valid remote control command, the
REMOTE CONTROL INDICATOR on the front panel blinks with a
blue color.
NOTE: The other buttons on the remote control unit work for CEC
CD3800 but not for AMP3800.
Precautions on Using the Remote Control Unit
●Avoid exposing the remote control sensor on AMP3800’s front panel to direct
sunlight or other light sources, as such exposure can cause malfunction.
●When operating the remote control, point it towards the remote control
sensor.
●Make sure nothing is blocking AMP3800’s front panel, where the remote
control sensor is located.
●Battery drain may cause the remote control unit to malfunction. Change the
batteries to new ones of the same type (AAA) if this happens.
●The remote control unit should be handled with care. Dropping it on can result
in damage.
●This manual only explains how to use the remote control unit with AMP3800,
but this unit can be used CD3800.

AMP3800 User's Manual
13
Battery Installation
Remove the cover of the battery compartment. Insert the provided two AAA
batteries into the compartment. Make sure that the batteries are inserted with
their positive (+) and negative (-) poles positioned correctly, and put the cover
back on.
Battery Replacement
If the distance at which the remote control unit can be used to operate
AMP3800 seems to be decreasing, the batteries may need to be replaced.
Cautions on handling batteries
●Never use different types of batteries together. Both rechargeable
and non-rechargeable batteries can be used, but the two should not
be used together.
●If you will not be using the remote control unit for an extended
period of time (more than a month), remove the batteries to prevent
leakage.
●If the batteries leak, use a cloth to wipe away the liquid inside the
battery compartment and replace the batteries with new ones.
●Do not heat or disassemble batteries, and never dispose of old
batteries by throwing them in a fire. Dispose of batteries following
laws in the local area.

Control / Power Amplier AMP3800
14
Cautions Regarding Handling
Maintenance
●Never connect the speaker output terminals to any ground. Both speaker
terminals carry an active signal due to the full balanced circuit design of
AMP3800.
●Be careful when connecting active subwoofers or similar devices to the
speaker terminals. A short circuit to the ground may result in damage to
AMP3800 or a broken fuse.
●The DC voltage at the speaker terminals is not 0 when measuring related to
ground. However, the differential DC voltage from (+) to (-) speaker terminal
is nearly 0 and thus harmless to speakers.
●Audiophile ampliers produce heat! Make sure to leave enough open space
around AMP3800 (at least 15cm) for keeping the air circulating. Make sure
you never cover the heatsink and air vents on the top cover, which could
result in an overheating. It is recommended to use AMP3800 in a low-dust
environment.
●In case of overheating (over approx. 70 ℃) AMP3800 will cut off the
operating power automatically. In this case it is suggested to put the main
power switch to “OFF” position. Otherwise AMP3800 will power ON again
after cooling down.
●AMP3800 requires no periodic maintenance and contains no user-
serviceable parts. Contact your dealer or an authorized CEC service center
for inspection and repairs in case of malfunction.
●If the surface of the AMP3800 enclosure is soiled, wipe with a soft cloth or
use diluted neutral cleaning liquid. Be sure to remove any uid completely.
Do not use thinner, benzene, alcohol, chemical cloths or bleaching agents as
these may damage the surface of the AMP3800 enclosure. Also avoid using
aerosol insecticides near the unit.
●If dust should have accumulated on the unit, remove it with stick tape (e.g.
Scotch tape). Make sure not to touch the enclosure with any tools or other
hard parts.

AMP3800 User's Manual
15
Troubleshooting
f you suspect a malfunction of the unit, please check the following chart before
calling your dealer.
No power
●Check the connection at the both ends of the AC power cord.
●Make sure there is power at the wall outlet.
●Check the power switch position.
No sound
●Check the connection from the external source, e.g. CD player.
●Check the operation of the external source, e.g. CD player.
●Check the connection to the speakers.
●Check whether the matching input is selected.
●Check mute is off.
ERROR indicator is on
●Turn AMP3800 off and unplug the AC power cord from the outlet. Wait for a
minute, plug the AC power cord back in and turn AMP3800 on again. Check all
plugs on the rear panel are properly connected.
Humming noise
●Check all pin plugs are connected adequately.
Unresponsive to remote control
●Point the remote control towards the remote control sensor on the front panel.
●Remove any objects blocking the sensor.
●Use the remote control at a shorter distance from AMP3800.
●Replace the batteries in the remote control unit with new ones.
NOTE: AMP3800 contains a microcomputer that can malfunction due to
external noise or interference. If this seems to be the case, turn the unit OFF
and wait for a short while before turning it back on and trying again.

Control / Power Amplier AMP3800
16
In case you need to contact the service center please prepare the following
information.
●Model name and serial number
●Purchase date
●Dealer name and contact information
●Description of the unit’s problem
Service Contact Preparations
Specications
Rated power: 2 x 64W (8Ω), 2 x 85W(4Ω)
Frequency Response: 20Hz – 20kHz, +0/-0.07dB (1W)
Frequency Range: 5Hz - 185kHz, +0/-3dB (1W)
S/N Ratio: -105dB (A-weighted, 1W)
THD: XLR IN: 0.004%, RCA IN: 0.01% (1W)
Damping factor: 250 (1kHz, 1W)
Input terminals: 1 x balanced XLR, 4 x unbalanced RCA
Output terminals: 1 x balanced speaker, 1 x REC out (RCA)
AC power Line: AC120V/230V, 50/60Hz (Specied on rear panel)
Power consumption: Min. 38W, Max. 300W
Dimensions: Approx. 435(W) x 378(D) x 102(H) mm
(Incl. knobs, terminals and legs)
Weight: Approx. 10.3kg
Accessories: AC power cord, Remote control unit,
Two AAA type batteries, Owner’s manual
Color: Silver / Black
NOTE: Design and specications are subject to change without notice.
NOTE: Illustrations on the owner’s manual may deviate from the actual unit
due to design improvements.

0906-A