What Class A is better? SUGDEN FPA-4 or PASS LABS XA-25

I`d like experiences of the gurus.

Thanks

sacresta02-02-2018 8:24pm

georgehifi Details Discussions Posts This discussion 10,312 posts 02-22-2018 at 06:20am Copy Comment URL Report Comment Edit Delete designed by James Sugden, for Universities. The A21 was the first amplifier to be put into production I think you’ll find one that I had was even earlier, the Sugden P51 C51 Cheers George
georgehifi Details Discussions Posts This discussion 10,312 posts 02-22-2018 at 08:14am Copy Comment URL Report Comment Edit Delete Sugden P51 C51 pre/power In case your wondering, 1960's http://img.canuckaudiomart.com/uploads/large/1792160-sugden-p51-and-c51-combo.jpg Cheers George
georgehifi Details Discussions Posts This discussion 10,312 posts 02-21-2018 at 07:26pm Copy Comment URL Report Comment Edit Delete Looking at the parts only inside viewpoint, the Pass25 has got the nod over the Sugden. Bigger trany More supply capacitance Multiple smaller PS caps for lower esr More heatsink fin area, which makes me question the Sugden’s amount of Class-A. Pass: http://www.6moons.com/audioreviews2/passlabs3/open.jpg Sugden: https://i.pinimg.com/564x/5d/79/d3/5d79d3b2cae87e51ce6b5adc221db1bc--audio.jpg Cheers George