21
10. PHONO MC OPTION
10.4. Adjusting the MC input
Before you can adjust the MC input, you need to take off the cover by removing the M 3
screws, (8 pc.)
Before opening the cover it is mandatory to remove the mains power cord from the power
supply.
(A) Subsonic filter
Uneven records and mismatched cartridge – tone arm
combinations can result in low frequency signals in the range
below 15Hz (additional to the music reproduction). Signals
of this low frequency cause excessive swing of the bass
driver membrane, especially if it’s a bass-reflex system.
Electrostatic speakers should be protected against such low
frequencies in general, because the bandwidth of the input
transformer of a wide band electrostatic speaker is normally
limited to approximately 20Hz.
The low frequency signals can be reduced with the Subsonic
Filter. The cut – off frequency of this Filter is 15 Hz / - 3 dB.
Delivery State : Subsonic Filter ON
(B) Gain- Setting
The gain switch allows you to match the gain factor of the
phono-amp for your cartridge.
gain high: for normal MC-cartridges < 0,5 mV
gain low: for high Output-MC-Systems > 0,5 mV
State of delivery: gain high
Gain - Setting
for both channels
Switch for Subsonicfilter
left and right channel
Load - Impedance
(A)
(B)
(C)
direction
front panel
off
on
1
slide switch
slide switch
gain
low
gain
high
1
Summary of Contents for HP 300 SE
Page 1: ...HP 300 SE Owner s Manual English ...
Page 3: ...4 ...
Page 24: ...25 12 TECHNICAL DATA AND DIMENSIONS Preamplifier HP 300 SE Power Supply 390 mm ...
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