Hakkoh KTX-4000V User manual

SOLI D STATE
SÏEREO AMPLI FI ER
Model KTX-$OOOV
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OPERATI NG INSTRUCTI ONS
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Date:
2020.10.27
13:08:32
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SOLTD-STATE STEREO AMPLI FIER
Newly designed, all silicon transistor Hi-Fi Stereo Amplifier KTX series are all with complemental
circuitry. 6 Watt (rms) for KTX-1200V, 15 Watt (rms) for KTX-2000V and 25 Watt (rms) for KTX-
4000V per channel at 8 ohms load can be obtained. These amplifiers are designed to gain the best
functioning when used in combination with the KTX-1000T FM/AM Stereo Multiplex Tuner.
SPECIFICATIONS
OUTPUT POWER: 25W Per channel 8 ohm
HARMONIC DISTORTION: less than 2%
FREOUENCY RESPONSE: 25 - 40,000H2 + 2dB
INPUT SENSITIVITY:
MAG: 3mV
CER: 400mV
TUNER: 150mV
AUX: 150mV
EOUALIZER: RIAA
S/N RATIO: more than 50dB
CROSS TALK: more than 45dB
OUTPUT IMPEDANCE: 4 -1 6 ohm (std. 8 ohm)
TAPE OUTPUT: 50mV at R 47K ohm
TONE CONTROLS:
BASS: 100Hz tl0dB
TR EBLE: 10,000H z !10d8
POWE R SUPPLY: ACl 17125OV, 50/60H2
':& SEM I CON DUCTORS: 22 Silicon transistor
4 varistor
8 Silicon diodes
350W x 200 x 110Hm/m
DIMENSIONS:
WEIGHT i 4.05 kg
These amplifiers feature the following:
1. Reproduction with ininimized distortion and high damping effects due to its OTL (output trans-
formerless) circuitry.
2. lnstant on, no warm-up.time required because of trànsistorized.
3. lt is designed for use with magnetic, ceramic and crystal cartridge.
4. Simultaneous balancing both channels with "BALANCE" control.
5. lndependent tone control devices, "TREBLE" and "BASS", meaning easy tone adjustment to users'
taste and listening conditions.
6. Less power consumption and heat generation as solid state circuitry.
7. Ïurnished with tape recorder output terminal that enable to tape record from any sources like tape
head, tuner or record player.

:*
CAUTION
1. Avoid placing the unit directly in the sun, or heated area.
2. Do not allow the surrounding temperature to arise over l22degree F.
3. Make sure that there should always be proper air space above and behind the unit. Do not directly
place anything on or near to the unit. Such cautions will enable you to enjoy years of care free
operation.
4. Do not short circuit speaker output terminals. The unit is designed so that Short circuit may not
directly result in damage but still care must be take on the part of users.
OPERATION
Prior to operation of the amplifier whatever the sound souice to be connected, connections must first
be made to speakers. The amplifier is designed for stereo reproduction and two speaker systems are
needed for its operation. For connections, follow the instructions given below while referring to the
CONNECTION DIAGRAM.
SPEAKER CONNECTION
1. Connect the lead of the left speaker to + 6nd - terminals, marked "L-CH SPKR".
2. Connect the lead of the right speaker to + and - terminals, marked "R-CH SPKR".
Noté: Make sure that the polarity of speaker systems terminals corresponds properly to those of the
amplifier. Most speaker systems indicate terminals by + and - or otÉer with for polarity. The
amplifier is designed for 8 ohm output impedance so that it reproduces best sound when
connected to speaker systems rated for 8 ohm impedance. However, it works satisfactory on
those speaker systems rated for 4 ohm to 16 ohm.
When four speaker systems for KTX-I200V or KTX-2000V=are required, attention should be given to
the following points: * KTX-4000V is provided with such spqaker selector switch.
al "L" and "R" of speaker terminals (A & B) are respectively connected in parallel.
b) When using 8 ohm rated speakers for "L" and "R", connect them wíth either A or B speaker
terminals.
c) Follow the figure shown
RL
SPEAKER A.
lf speakers other than 8 ohm are connected, it
chan n el.
below when connecting four 8 ohm speaker systems.
RL
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SPEAKE R EI.
is advised to put 8- 16 ohms toad on each
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PROVISIONS
"AC FUSE" The blown fuse here stops the entire functioning, and cfieck to see tlre
cause for it before replacement of the fuse, which must be rated for lÀ
,,PROTECTION FUSE" Each channel on the unit is protected with "PROTECTION" fuses wttidl
are provided inside the unit, both rated (see below *), by protecting power
transistors. When the speaker output terminals are left short-circtrited for
a long time by mistake, the protection fuses may be blown, ttus protetrtirg
power transistors frqm damage by rush current.
Note: Transistorized amplif iers start functioning immediately afterswiÉ-
ed or, and rush current may sometimes break the fuse. Even so,
it does not mean a damage of the unit. This is more frequent
when signal is on the amplifier input, with volume control set to
tè 1.0A for KTX-1200V
tÉ 1.5A for KïX-2000V
* 2.OA tor KTX-4000V
,,UNSWITCHED 2OOW" This is provided for connectgon with record player, tuner or tape recorder-
Designed unswitched, it is always hot with your alternating current (AC.l.
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