Copland CTA 407 User manual

1
COPLAND
CTA 407
USER GUIDE

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What’s in the Box
AMPLIFIER
POWER TUBES –4 pcs.
POWER CORD
REMOTE CONTROL
USER GUIDE
GETTING STARTED
Open the carton and remove the amplifier from its plastic bag. Before placing the unit in your
home, read this carefully.
CAUTION!
Various regulation agencies require us to bring the following information to your attention.
Please read carefully.
WARNING !To prevent fire or shock hazard, do not expose this unit to rain or moisture.
!Check that your supply voltage is the same as indicated.
!Dangerous voltage inside. Do not open the cabinet without disconnecting the
mains power cord.
!There are no user serviceable parts inside. Repairs should be carried out by
qualified service personnel only.
!Ensure that no objects or fluids pass through the ventilation openings.
If liquid is spilled into the amplifier, disconnect from the mains and consult a
qualified service technician.
Do not subject the amplifier to high mechanical vibration, the tubes are sensitive to this.
Allow adequate clearance so that cool air can enter at the chassis ventilation holes.
Never place the amplifier on a carpet or similar surface that obstructs air circulation through
the unit.
The trouble-free life of an amplifier is greatly extended by providing sufficient ventilation to
prevent build-up of high internal temperatures that cause deterioration.
The recommended minimum ventilation space is 50 cm wide and 40 cm high.

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Installation
To prevent the output tubes from damage and disconnecting, the power tubes are not
installed during transport.
Before use, the four power tubes should be placed in the free octal sockets on the main
circuit board inside the amplifier marked V1, V2, V3, V4. The tubes have been matched at the
factory and are delivered as matched pairs.
Place one pair in the left channel octal sockets (V1 & V2).
The other pair in the right channel octal sockets (V3 & V4).
! BE CAREFUL THAT THE POWER TUBE PIN ALIGNMENT TAP MEETS THE MATCHING GROOVE
ON THE TUBE SOCKET BEFORE PRESSING THE TUBE DOWN THE SOCKET.
TUBE 1 TUBE 2 TUBE 3 TUBE 4
TUBE 6 TUBE 5 TUBE 7
Automated bias adjustment
Traditionally tube amplifiers need manually adjustment of the so-called bias voltage.
The bias setting ensures that the currents through the power tubes are in balance and
consistent with the electrical operational points the amplifier has been designed for.
The CTA407 employs an intelligent bias adjustment. Each output tube having its own
dedicated bias circuit. Throughout their lifespan, the CTA407 is constantly monitoring the bias
status of the power tubes and automatically adjusting their bias voltage. It ensures trouble
free usage and optimal sound quality without ever needing manual adjustments.
Input / Outputs
Use shielded cables to connect the signal source to the amplifier input. To minimise the
possibility of hum, the shielded cables should run parallel to each other or loosely twisted
together. Locate the cables away from speaker leads and AC power cords.
AC Power
The amplifier AC power cord is plugged into an 115V/120V/230V/240Volt 50/60 Hz. Wall-
outlet. The right voltage is indicated on the back panel next to the AC power inlet.
!Check that your supply voltage is the same as indicated.

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Front Panel
C O P L A N D
ST BY.TAPE
SB ON
1
2
3
4
PH
VOLUMESELE CTOR
8888
TUBE 1 TUBE 2 TUBE 3 TUBE 4
LED CTA407
I N T E G R AT E D T U B E A M P L I F I E R
INPUTS
61 2 3 4 5
1. Source Selector: Selects the appropriate
input signal source.
2. Tape Monitor: If you have connected a
tape recorder to the “tape in” on the back
of the unit, then switching ´Tape’will
make it possible to listen to tapes.
If your tape recorder has a monitor
capability (usually requires a separate
playback head), you can monitor your
tape recording as it is being recorded by
switching the tape button.
The Tape Monitor function can also be
useful when adding an Equalizer / Room-
correction unit in the signal chain.
A red lamp right above the tape key
indicates Tape Monitor activated.
NOTE: When the Tape Monitor is engaged,
it bypasses the Selector Switch. Regardless
of which source the selector is set for, you
only hear the tape input.
If the Tape Monitor is accidentally left on,
none of the inputs on the Source Selector
will operate.
3. Display: The display shows the selected
source input.
A flashing ‘ON’ lamp indicates that the
amplifier is under its 30 seconds start up
procedure. When the ‘ON’ lamp stops
flashing, the amplifier sound stages start
operating after another 20 seconds.
A continuous flashing ‘ON’ lamp for more
than 35 seconds. Indicates that the
amplifier is in ´protection mode´ and
needs to be reset by turning the back
panel AC-power switch off a few seconds
and then on again.
(More information about the ´protection
mode´ to be found on next page of this
manual)
4. Power Switch: Pressing this key, the
amplifier will switch cyclically between
operation and standby mode. Power On
and Stand By are indicated in the display.
5. Audio Level: To adjust the volume to
the desired listening level, turn the control
clockwise to increase the volume.
6. LED: Reducing the numbers of lighting
bias LEDs to only green ones on

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Diagnostic LED panel
TUBE 1 TUBE 2 TUBE 3 TUBE 4 LED CTA407
I N T E G R AT E D T U B E A M P L I F I E R
The position of the four power tubes, inside the amplifier, is marked with the numbers one to
four.
Tube number 1 & 2 is left channel power tubes. Tube number 3 & 4 is the right channel.
Correspondingly, the operational status of each tube can be seen on the bottom LED panel of
the CTA407 when the amplifier is turned on and have finished its approximately two minutes
warm up procedure.
The four groups of ten LEDs, related to each tube, are ordered in the following way.
*The two first blue colour LEDs shows that current is running through the tube.
However, below its desired operational point.
*The green colour LED indicate that the tube has reached its correct bias
operational point.
By pressing the left corner ´LED´ push button, only this LED will illuminate.
*When the amplifier is on and no signal is present, only the green and the two
blue LEDs are lighting up, indicating that the output stages of the amplifier are
running fine and ready to play music.
*The orange colour LEDs, number four to nine in the line, shows that the
current through the tube is extending its quiescent bias point. When a music
signal is present and the averaged signal to the speakers exceeds 20 W, the
orange LEDs will start flashing like a VU-meter. - more LEDs indicating
increased output power.
*If the orange LEDs stays lightening up when no signal is present, it is an
indication that the tube is operating. However, defect or out of specifications.
*Last in line, the single redcolour LED, indicate that the tube has reached its
maximum current and the maximum output power has been exceeded.
If a tube for some reason becomes over-stressed, the red LED corresponding
to the tube will stay reed and the amplifier will go into protection mode.
All you need to do, is turn the amplifier OFF for a few seconds, using the back
panel power switch, and then ON again to reset the amplifier and restore
normal operation.
In the event of defect tube short circuitry, the amplifier will continuously go
into protection mode again after it has been turned off and on. The red LED
related to the defective tube will stay on indicating the tube needs to be
replaced.

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Back Panel
INTEGRATED AMPLIFIER
DESIGN BY COPLAND
MADE IN DENMARK
C O P L A N D
SERIAL NUMBER:
MAX POWER CONSUMPTION. : 400W
50/60 Hz. V OLTAGE: 230 V
Model No.
L
R
1 2 3 44
GND
OUT IN
SPEAKERS L R
8 ohm
4 ohm
GND GND
4 ohm
8 ohm
AC POWER.
AC POWER INLET
RIS K OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION !
RIS QUE DE CHOC ELE CT RIQUE
NE PAS OUVRIR
ATTENTION !
PHONO LINE INPUTSTAPE
ONONOFF
INTEGRATED AMPLIFIER
C O P L A N D
Model No.
1. 2. 3. 4. 5. 6. 7. 8. 9.
1. Ground: Earth connection for any device that needs to be grounded.
2. Phono/RIAA Section: Accepts input from a Turntable. The amplifier is designed for a
MM magnetic pickup (cartridge) or high output MC (Moving Coil).
3. Tape Out: The record output jack permits recording directly any signal being reproduced
by the amplifier.
4. Tape In: Connect with the playback outputs of a tape recorder.
5. A1, A2, A3, A4: Standard analog inputs.
6. Speaker Output Terminals: Right Channel
7. Speaker Output Terminals: Left Channel
9. AC Power: Mains power. I = ON. O = OFF
10. AC Power connector: 120V / 230V / 240V AC. depending on country.
The right voltage is indicated on the back panel next to the AC power inlet.
!Check that your supply voltage is the same as indicated.

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Maintenance
The CTA407 is built for a long lifetime use, and no special care needs to be taken, except from
what is already described under installation. However, the heart of the amplifier is the tubes,
and like a light bulb, they have a limited lifetime. After a period, they may affect the
performance of the amplifier. The tubes are operated below their full nominal power, which
considerably increases their life expectancy. The lifetime of the tubes should be at least 4000
hours, assuming that the amplifier is switched on and off a couple of times per day.
Tube employment.
6550 / KT88 4pcs. (V1. V2. V3. V4)
12BH7 or ECC82/12AU7 2pcs. (V6 & V7)
ECC83/12AX7 1pcs. (V5)
The auto-bias system will adjust also for use with:
KT90 / KT100 / KT120 / KT150
Remote control
The CTA407 comes with the Copland RC-102A remote control. It operates all basic functions
of the amplifier.
Due to environmental regulations, it is shipped without the battery.
The remote control employes one battery type: CR2032
Warranty and Service
Copland provides a warranty to the first purchaser for a period of two year.
Copland usually commissions the Copland agency in the country in which the amplifier was
purchased to carry out any warranty work.
Following consent from Copland in a particular case, the warranty service may also be
claimed at an agency in another country.

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CTA407 Specifications
Tubes. 6550 / KT88 4pcs. (V1. V2. V3. V4)
12BH7 or ECC82/12AU7 2pcs. (V6 & V7)
ECC83/12AX7 1pcs. (V5)
The auto-bias system will adjust also for use with:
KT90 / KT100 / KT120 / KT150
Rated power. 50W / channel at 4 / 8 ohms.
THD. Less than 0.8 % at all levels
Frequency response. 10 Hz - 150 kHz - 3 dB
Power bandwidth. 20 Hz –20 kHz. - 3 dB
Input sensitivity Line. 200 mV for rated power
Input sensitivity Phono. 2,5 mV for rated power
Input impedance Line. 50 K ohms
Input impedance Phono. 47 K ohms
S/N ratio (IHF-A): 100 dB
Power consumption. 300 W
Nominal mains voltage. 115V or 230V / 240V
Factory set for destination country only.
Mains voltage range. +/- 12 %
Dimensions (mm.) 435 (W) 215 (H) 420 (D)
Weight. 20 kg