ACUHORN M4 User manual

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ACUHORN
ACUHORN
OWNER’S MANUAL
ENGLISH
M4

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ACUHORN
M4
STEREO AUDIOPHILE POWER AMPLIFIER
6C33C TUBE, SINGLE ENDED, CLASS A
ACUHORN AMPLIFIERS INVITE YOU TO HIGH PRECISION PRESENTATION OF MUSIC, WITH MULTITUDE OF DETAILS FINE
SOUNDSTAGE POSITIONING. THE AMPLIFIERS 6C33C TUBES FAMOUS FOR THEIR NEUTRALITY AND POWER. THEY ARE
SUPPLIED WITH ULTRA SPEED DC-DC CONVERTERS WORKING AT 2MHZ. MODERN EXECUTION ALUMINUM BODY, BEAUTY
WATCH AND EASY TO USE. EACH OF TUBES WORKS INDEPENDENTLY. NOT MATTER WHICH TUBES ARE REMOVED.
IF YOU USING ONLY ONE TUBE. YOU CAN PUT TUBE IN ANY SOCKET.
GENERAL SAFETY INSTRUCTIONS
DO NOT USE THE AMPLIFIER NEAR PRESENCE OF CHILDREN.
THREATENS TO BURN YOUR HANDS, VERY CAREFUL NOT TO TOUCH THE HOT TUBE.
BEFORE REMOVING THE TUBES MAKE SURE ARE COLD.
DO NOT DEFEAT THE SAFETY PURPOSE OF THE GROUNDING TYPE PLUG AND SOCKET.
DO NOT INSTALL NEAR ANY HEAT SOURCES THAT PRODUCE HEAT (INCLUDING AMPLIFIERS).
DO NOT BLOCK ANY VENTILATION OPENINGS.
UNPLUG AMPLIFIER WHEN UNUSED WITHOUT DELAY, THERE IS NO STANDBY MODE.
THE APPARATUS HAS BEEN DESIGNED FOR USE IN MODERATE CLIMATES.
REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE COVER.
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE AND TUBES.

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RESISTANCE TO TEMPERATURE
YOU MUST NOT TAKE OUT TUBES DURING WORK – IT MAY RESULT IN BURNING ONESELF.
THE AMPLIFIER WARMS UP SUBSTANTIALLY DURING WORK BECAUSE OF CLASS-A OPERATION MODE.
IT IS IMPORTANT TO MAINTAIN A LOW TEMPERATURE BY AIR CIRCULATION UNDER ITS BOTTOM
IT IS RECOMMENDED TO LOCATE THE AMPLIFIER IN COOL - AIRY SPOT,
PLACE FAR FROM ACCIDENTAL REACH TO AVOID RANDOM TOUCH AND BURN.
THE SHELVES, WITH ITS BOTTOM LIF TED ON STANDS TO ENABLE AIR CIRCULATION UNDER ITS BOTTOM.
AFTER FINISHING THE WORK, THE AMPLIFIER IS SWITCHED OFF WITH THE SWITCH AND LEF T TO COOL.
neutral range of living room temperature
up 18°C / 64°F to 22°C / 71.6°F

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ACUHORN
CONNECTING
NECESSARY IS AC POWER PLUGS MUST BE CONNECTED TO THE EARTH (GROUND).
EACH AMPLIFIER UNIT IS RECOMMENDED TO CONNECT TO AC POWER SOCKETS OF INDEPENDENT THREE-PHASE ELECTRIC
POWER.
IT CONNECTS WITH A MAINS SUPPLY VOLTAGE IN AUTORANGING 90 – 265 VAC @50/60 HZ.
AMPLIFIER IS READY FOR WORK AFTER INSERTING TUBES 6C33C IN THEIR SOCKETS.
TO DRIVE THE FULL POWER NEED INPUT VOLTAGE 2.0 V RMS TO CONNECT ANALOGUE TYPES RCA PHONO
FRONT THE INPUT AUDIO SIGNAL IS 21 POSITIONS STEPPED ATTENUATOR FOR VOLUME CONTROL.
SPEAKERS TO CONNECT TO THE BINDING POST BEFORE RUNNING POWER. DISCONNECT THE SPEAKERS WHEN THE POWER
IS TURNED OFF.
THE MAIN RED BUTTON SWITCHES IT ON.
AMPLIFIER READY IS AFTER 120S, TO FULLY WARM THE TUBES SEVERAL MINUTES ARE REQUIRED.
POWER
ON/OFF
THE MAIN
CONNECT
VAC90 – 265
SPEAKER OUTPUTS AUDIO INPUTS VOLUME
CONTROL

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ACUHORN
TECHNICAL SPECIFICATIONS
ACUHORN MONOBLOCK TUBE AMPLIFIER M4
INPUT VOLTAGE MAINS
MAXIMUM INPUT POWER 230 W PIECE
OUTPUT TRANSFORMERLESS TYPE
POWER TUBES 6C33C
DRIVER TUBE 5718 TUNG-SOL
VOLUME CONTROL
OUTPUT POWER TUBE 20W
WEIGHT 3,6 KG PIECE
DIMENSIONS W 320 X D 460 X H 26 MM
PARTS OF THE STRUCTURE
POWER TUBES 6C33C FOUR PER CHANNEL
DRIVER TUBE
VICOR MODULES DC-DC CONVERTERS
MURATA Y2 CAPACITORS
NIPPON CHEMI-COM LXZ LXV KXG 105C
21 STEPPED ATTENUATOR SMD RESISTOR
POWER FILM RESISTORS CADDOCK MP930
INPUT AND OUTPUT CONNECTORS RHODIUM
ARCOLECTRIC ROCKER SWITCHES COPPER-SILVER
VISHAY KBU8G BRIDGE RECTIFIERS
SCHURTER 10A/250V AC MAINS INPUT
AUDIO PATH SOLID CORE COPPER
AUTORANGING 90 – 265 VAC @50/60 HZ
5718 TUNG-SOL

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ACUHORN
WOJCIECH UNTERSCHUETZ
KARTUSK A 245
GDANSK 80-125
POLAND
PHONE [phone]
WWW.ACUHORN.PL
EMAIL: [email protected]