Hello
The best amp I've ever heard on my Quads is a Futterman OTL. I've had Manley El84's, EAR 509's, Audio Innovations 2A3's, Lectron EL34's (JH50), Audionote Single Ended and an Audionote copy of the Ongaku using 211 valves. Once you hear a good OTL, amps with output transfomers seem veiled. Also OTL's love the high impedence of Quad 57's. Watch out for Croft OTL's especially the 3R which is supposed to be amazing. I heard a Series 3 which was great but not quite as good as my Futterman. Surprisingly too I think my Croft Twinstar Mosfet/Valve hybrid out performs any non OTL valve amp. There's a chap in London called Adrian Parsons (Audioflair.co.uk) who has led me through the maze of amps out there to where I am now and he's been right every time.
have fun SgtWilko
The best amp I've ever heard on my Quads is a Futterman OTL. I've had Manley El84's, EAR 509's, Audio Innovations 2A3's, Lectron EL34's (JH50), Audionote Single Ended and an Audionote copy of the Ongaku using 211 valves. Once you hear a good OTL, amps with output transfomers seem veiled. Also OTL's love the high impedence of Quad 57's. Watch out for Croft OTL's especially the 3R which is supposed to be amazing. I heard a Series 3 which was great but not quite as good as my Futterman. Surprisingly too I think my Croft Twinstar Mosfet/Valve hybrid out performs any non OTL valve amp. There's a chap in London called Adrian Parsons (Audioflair.co.uk) who has led me through the maze of amps out there to where I am now and he's been right every time.
have fun SgtWilko