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This is the new solid state preamplifier I built. It features opamp based gain stages, digital volume control (using DS1666 chips), input selection with relays, remote control, and an MM/MC phono stage.



This is a photo shot when the pre was still in the assembling phase. Later, I decided to suspend the transformers with elastics, to eliminate vibrations induced by those magnetic devices. You can see a photo of the particular here:



This isn't the best implementation of infra-sonic suspension, elastics are too short and there is too much damping from the attached wires (in theory the system should resonate with zero damping on a single, precise, sub-sonic frequency, like 1Hz or so), but it worked for me, with a reduction of about 10dB in background noise, especially 100Hz component.