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Important Safety Instructios

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 qualifi 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.

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 amplifi 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 fi t your outlet, consult an electrician for replacement 

of the obsolete outlet. (For European Countries: ) Do not defeat the safety 

Summary of Contents for HD53N

Page 1: ...Owner s Manual...

Page 2: ...o the integrated power amplifier HD53N can be the center of a very high grade music listening equipment HD53N incorporates a truly balanced circuitry and consequently offers balanced headphone operati...

Page 3: ...headphone It also automatically changes the gain for leveling XLR and RCA inputs This makes HD53N a very versatile headphone ampli er HD53N s headphone output LOW is guiding the headphone s movement...

Page 4: ...TRE 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 open...

Page 5: ...er 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 t...

Page 6: ...alfunctions 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...

Page 7: ...pairments Take care not to increase the volume too much When adjusting the sound volume level make sure you do not disturb other people and your neighborhood The packaging of HD53N should contain the...

Page 8: ...selector button to change to different input and output 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 t...

Page 9: ...high and low impedance headphones This practice was leading to some headphones being tuned to sound better with 120 Ohm Comparing and listening both outputs may be the best way to nd the output which...

Page 10: ...e maximum output power varies with the connected devices and input sources When the sound is distorted the power may exceed the maximum already In this case change the gain setting to LOW GAIN or decr...

Page 11: ...ctors Use interconnect RCA cables to connect the RCA input to external sources with RCA line output such as CD player tuner or tape deck Phono and digital sources cannot be connected to the RCA input...

Page 12: ...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 HD...

Page 13: ...s which could result in an overheating It is recommended to use HD53N in a low dust environment In case of overheating over approx 65 HD53N will cut off the operating power automatically In this case...

Page 14: ...icator continues blinking and the unit is not ready for use Turn HD53N off and unplug the AC power cord from the outlet Wait for a minute plug the AC power cord back in and turn HD53N on again Check a...

Page 15: ...r Gain HI LOW Selectable Input terminals 1 x balanced XLR 1 x unbalanced RCA Headphone output 1 x balanced XLR 0 Ohm Impedance 1 x 6 3mm Jack 10 Ohm for best control 1 x 6 3mm Jack 120 Ohm for sound t...

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