Atc active 50s. Paired with Supratek Cortese LCR phono preamp. Atc impedance is crucial to match with a preamp, most tube preamps aren't neutral enough or able to have low enough impedance to match Atc. And that's defeats the purpose of Atc if you can't get the impedance within the parameters. I lived with the stick tubes for some time but eventually started rolling them. After several tube rolling rabbit holes I followed a recommendation of another Supratek owner who swapped out the two 6sn7 tubes with an adapter for quads, went with NOS (1942s in my case) 7193 2C22 Ken Rads and the rest was history....glorious sound...oh and later added cold extruded pure silver XLR Interconnects hand made in Australia which took to another level.
