Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
It's voltage that will kill a 57, however, if the 57 is fitted with the extra filtering that was fitted at the introduction of the 303, or retrofitted to 57's already in service, the 57 can withstand the voltage generated by the Quad 405 (with the limiters in), and the 405 then had an output of 50 Watts per channel in to 8 Ohms.
So your Yamaha is probably slightly too powerful for the 57's.
Details of the Quad extra filtering: https://flic.kr/p/9CvfGT
Spendorman
Any thoughts on using the Quantum Electronics 1A100?
Pre & Power
Technics SUC 909U & Technics SE A909S
Turntable
Thorens TD 125 MK1 , SME 3009 S2 Non Improved , Shure V15 II , SME 2000 Plinth
CD Transport & DAC & PSU
Marantz 6005 , Beresford Caiman , Paul Hynes SR4
Front Loudspeakers
Tannoy 615 MK2
Rear Satellite Loudspeakers
Wharfedale DX 1
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
A 303 gives very good protection to the 57, Possibly a small transistor noisy in yours.
Spendorman
Quantum is Rated at 25 watts another option is the Original NAD 3020 that is 20 watts too Choices Choices...
Pre & Power
Technics SUC 909U & Technics SE A909S
Turntable
Thorens TD 125 MK1 , SME 3009 S2 Non Improved , Shure V15 II , SME 2000 Plinth
CD Transport & DAC & PSU
Marantz 6005 , Beresford Caiman , Paul Hynes SR4
Front Loudspeakers
Tannoy 615 MK2
Rear Satellite Loudspeakers
Wharfedale DX 1
Location: Middlesex, UK
Posts: 4,482
I'm Alex.
Interesting, Geoff's post above and mine, exactly at the same time, appear to be along similar thoughts.
Spendorman
Location: Middlesex, UK
Posts: 4,482
I'm Alex.