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ZÄHL HM1 

MANUAL V 1.0

P.

16

 

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DETAILS

Power Supply

Mains voltage and mains transformer are always potential sources of interference - consequently, we have
outsourced them to the HMP1 mains adapter.

The mains adapter also contains a standby power supply unit which delivers a stabilised low voltage. This voltage is
applied to the Power switch on the front panel of the HM1 and serves to switch on the actual mains transformer
via a relay.

Worldwide operation

The standby power supply has a wide-range input, is a purely linear design. 

The mains input is equipped with one of the best interference filters available and can be set for operation on the
following voltages: 100V-110V-120V-220V-230V-240V.

The mains switch on the back of the HMP1 can be used to completely de-energise the unit.

Variable cable length

The connecting cable between the mains adapter and the main unit carries potential-separated low voltages only.
Standard length is 0,65m. Shorter and longer versions are available. Custom length upon request.

Содержание HM1

Страница 1: ...Z HL HM1 Manual V 1 0...

Страница 2: ...onal users perfect impulse reproduction ultra wide frequency response extremly low impedance output precisely controls complex loads pure analogue design consistent dual mono layout logic circuits wit...

Страница 3: ...ources 12 Note 12 Sound Adjustment 12 Low and high frequency adjustment 12 Stereo Base control a little theory 13 Stereo Base control what it does 13 Balance 13 Headphones Outputs Balanced Connection...

Страница 4: ...o not continue to operate the equipment Have the equipment checked at your dealer s workshop or a person who is qualified to do such checks 14 When shipping use a package which protects the equipment...

Страница 5: ...apter Make sure that the locating peg shows upwards Turn the strain relief nut clockwise Push the connector slightly after a few turns The connector is seated correctly when the rubber seal on the soc...

Страница 6: ...Z HL HM1 MANUAL V 1 0 P 6 LEGEND LEGEND...

Страница 7: ...LEGEND P 7...

Страница 8: ...setup Streamer to HM1 Input A analogue source to Input B active speakers to Line Out Two sources connected to Inputs A and B precision level meter connected to Line Output Source levels can be exactly...

Страница 9: ...r in its purest form switchable negative feedback servo while maintaining Class A operation Precise finely tuned tools for sound adjustment Stereo base control for adjusting the stereo image spatialit...

Страница 10: ...ed by negative feedback Servo Since there is no crossover distortion there is nothing for the feedback circuitry to correct Rather it only corrects the errors which result from the interaction between...

Страница 11: ...heoretically always runs a little behind the action which can lead to artefacts in the signal However modern negative feedback audio power amplifiers are usually not purely Class AB Very effective tec...

Страница 12: ...ave an additional linear taper When a volume control is set to the full counterclockwise position this linear taper provides a control voltage to cut off the audio signal at a suitable point in the si...

Страница 13: ...ol one or two steps to the right The leftmost position is mono This is the preferred setting for early stereo recordings when individual instruments have been mixed to the extreme left or right withou...

Страница 14: ...ring two stereo sources the result may be recorded using one of the outputs The same applies when using the HM1 as a mixing console A Thru Output The A Thru signal is tapped from Input channel A post...

Страница 15: ...rrent Only this way an amplifier can produce absolutely undistorted output signals Realisation inside the HM1 In the HM1 the power supplies for left and right channels are separate for preamplifiers a...

Страница 16: ...ains transformer via a relay Worldwide operation The standby power supply has a wide range input is a purely linear design The mains input is equipped with one of the best interference filters availab...

Страница 17: ...ne I Os Inputs Impedance 20K max level 23dBu Outputs Impedance 47 max level 23dBu balanced I Os transformer like behaviour hot or cold may be connected to ground without loss Gain Line Line 0dB additi...

Страница 18: ...MP1 Unplug the power cable Find the fuse holder drawer on the mains input assembly between mains input connector and mains switch Use your thumbnails or a small flat blade screwdriver to unlock the la...

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