HI all,

I have made a lot of tests with different amplifiers for the last 4 years ( Hartsfield's with E145 / 2441 with original diaphragm, 2405 , original N500 filter circuit with paper oil caps)

Differences are huge between every amp !

I actually use an AUDIONOTE P3 SE 300 b amplifier, alternatively with a PLinius Sa 102 Classs A...
I love the sound of 300 B, but not too powerful for my large room ( 50 square meters) when listening Wagner or Pink Floyd, and not too good in bass ...

I love the bass ,the transparency, and the power of Plinius, but it's too "cold" for me after a couple of day, and there's a loss of details in comparison with the valve amp...

A lot of hartsfield owners are on this forum... what amplifier do you use , did you tried electronic filters and different amps for the mid and bass ...?

Best regards