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LP-1HE
RIAA Preamp

Regenerative power supply
Pure class A PSUs power supply
Fully non negative feedback ACSS design
"Linear Fidelity"  RIAA design
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Improvement may result in changes in specifications and design without notice.
The photos take from the MM version.

Summarize Use Manual Specs Shipping Cost

Please note:
         The LP-1HE has apply the especial design , user must connect the input cables then can power on the unit. Push or pull the input cables please shut down the unit at first .
        The LP-1HE need power on 20 minutes for run in to get the best sound quality and S/N. In term user can playing music and waiting.
         Change the switches state must shut down the amp's volume.

GND port connected:
       
The GND port is for connect to the phono turntable ground wire .

Switch upon on the IEC socket :

       
For power on / off the product's power supply .
        The product can power on always .
        Before operate the product's power button, please confirm the power amp has shut down.
 
       The product ACSS and XLR outputs are the single ended signal output .



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Configured setting guide:

        There are two switches for set the two channels input impedance and cap value .
        Users must change two switches setting for set the two channels parameter .
       
Please note that the same setting switches on L and R channels had the opposite number and ON direction, the number and ON direction have mark on the switches .
       Change the switches state please use the small screw driver like the test pencil.

MM Version :
      Most pickup recommend set to 100P and 47K ohm but user can try with different value to search the best taste sound .
Cap value configured:
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Switch state

50P

100P

150P

200P

Switch-1

OFF

ON

OFF

ON

Switch-2

OFF

OFF

ON

ON


Input impedance configured:
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Switch state

200K

100K

47K

33K

22K

10K

Switch-3

OFF

ON

OFF

OFF

OFF

OFF

Switch-4

OFF

OFF

ON

OFF

OFF

OFF

Switch-5

OFF

OFF

OFF

ON

OFF

OFF

Switch-6

OFF

OFF

OFF

OFF

ON

OFF

Switch-7

OFF

OFF

OFF

OFF

OFF

ON


Gain boost configured:
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Switch state

5mV

4.5mV

4mV

3.5mV

3mV

Switch-1

OFF

ON

ON

ON

ON

Switch-2

OFF

OFF

ON

ON

ON

Switch-3

OFF

OFF

OFF

ON

ON

Switch-4

OFF

OFF

OFF

OFF

ON


MC Version
:
       The cap set to larger value , the sound is more soft. The input impedance usually set  lower value for more dynamic playback.

Cap value configured:
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Switch state

100P

500P

1000P

1500P

Switch-1

OFF

ON

OFF

ON

Switch-2

OFF

OFF

ON

ON


Input impedance configured:
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Switch state

600ohm

300ohm

150ohm

100ohm

50ohm

20ohm

Switch-3

OFF

OFF

OFF

OFF

OFF

ON

Switch-4

OFF

OFF

OFF

OFF

ON

OFF

Switch-5

OFF

OFF

OFF

ON

OFF

OFF

Switch-6

OFF

OFF

ON

OFF

OFF

OFF

Switch-7

OFF

ON

OFF

OFF

OFF

OFF


Gain boost configured:
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Switch state

0.5mV

0.4mV

0.3mV

0.25-0.3mV

0.2mV

Switch-1

OFF

ON

ON

ON

ON

Switch-2

OFF

OFF

ON

ON

ON

Switch-3

OFF

OFF

OFF

ON

ON

Switch-4

OFF

OFF

OFF

OFF

ON


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