Attention: noise sources |
| The most units are connected to each other the more disturbances can occur, i.e. from bad or different grounding points. Older amplifiers are mostly grounded on its housing but newer models are not. The F-1 is as well not grounded which is the better solution against disturbances from other units. But connected to some pre- and main amplifiers models or other signal sources you may hear low frequency noise. |
Solution: |
| Prepare a 0.3 0.75 mm² isolated wire from F-1 housing to main amplifier. The stripped wire connects to the amplifier ground / GND srew. If not available remove on back side housing screw and put the wire under the screw and put the wire under the screw head and fix it. At the F-1 back side remove one screw and scratch off the rough surface 2-4 mm around the screw hole. Otherwise this anodized surface is non conductive. Then turn the stripped end of the other wire end around the screw head and fix it tightly but do not overdrive. |
More sound improvements: |
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| 1. | Move the F-1 farer from other units to find out if disturbances are changing to optimize the final position. Disturbances can be caused by RCA cables. Please check: |
| 2. | If disturbances change when you move the RCA cables find out no nois positions. |
| 3. | All RCA cables must be short. |
| 4. | The plugs must be tight on thze sockets. Loose shield contanct can be pressed slightly for better contact. |
| 5. | All contacts must be clean. |