[98venom]

Just finished burning in my Ultimate M3 preamp. I sourced the case from DIY fidelity. I used a DACT CT3 source selector for handling my inputs. I used a 50k stepped attenuator from DIY fidelity which I assembled. I installed two switched headphone jacks which terminate to two preamp RCA outputs. I used a fully populated STEPS power supply set at 30V. My M3 is populated with vishay dale metal films, Nichicon Muse caps, etc. The gain is set at 7.5 but I installed Sip pins for gain adjustment. OPAMPS are BURR Brown 637au and 627bp for the ground channel. All wiring is 24 gauge silver tinned copper wire.

This is one sweet sounding headamp/preamp. I connected it to my HYPEX power power amp and was rewarded with the M3 sound that I am familiar with, tubey, quick and impactful. I never knew that a stepped attenuator could have such an impact on the sound. Much more transparent than the alps blue velvet.