Dneu2011 Posted October 3, 2022 Share Posted October 3, 2022 Newly built Pass Preamplifier and Amplifier! The amp is based on Nelson’s M2 but has swappable daughter boards for different inputs. The preamp was designed by Wayne Colburne who is Nelson’s lead preamp designer and works for Pass Labs. I built the amp in a dual mono configuration as I had the space in the 5U chassis. The chassis I bought used so I had it powder coated satin black. Each amp board has its own Antek AS-2220 and 60,000uf in filter caps. The preamp has 4 inputs, one output, and a headphone output. I used the AMB O22 for the regulated PSU. Torroidal transformer is from Antek. The boards from DiyAudio include 5 daughter boards. I built 4 of them and the last I hadn’t built because the parts were unavailable and I hadn’t had time to source them (Norwood’s). I will include those blank boards. Power is 25 watts Class A into 8 ohms and 50 watts into 4 ohm. I have been using the setup on a pair of full range fostex speakers and tried it on my Harbeth speakers. Both sounded amazing!!! This amp has been said to be the absolute best amp from Nelson for mating with Klipsch speakers. I confirmed this by trying it with Cornwall III’s and other amps I built. Shipping this extra large amp and preamp will be costly, but can do it for a good deal. Asking $2000 plus shipping. Quote Link to comment Share on other sites More sharing options...
Dneu2011 Posted March 7, 2023 Author Share Posted March 7, 2023 This amp and the preamp have SOLD! Quote Link to comment Share on other sites More sharing options...
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