My 50 on top shelf reads 27 degrees Celsius with room temp 20C playing music on low/medium volume.
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With relatively sensitive TannoysâŚ.
Yes 89dB. Works great with the 25W Nait 50 
When I had ATC SCM20 at home with my NAP500 I felt they still struggled compared to the Tannoys. So matching and synergy is as always important to bring out the most of the products
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HI @Analogmusic
I havenât tried the Vertere Pulse X Mini speaker cable, but I canât imagine it would be a problem with the Nait 50.
FYI, during development, Nait 50 was designed to drive a decade capacitance load box (100pF, 1nF, 10nF, 1uF, 10uF), both pure capacitance and parallel resistance (0.5R, 1R, 2R, 4R, 8R, 16R). It is also tested on ultra-long speaker cable runs and dummy loads.
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I suspect perhaps that is more about the response / performance of the SCM20s vs your Tannoys..
The NAP 500 is not short of grunt.
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Thanks - that is useful to know.
I do think some of this info would be useful to publish?
Is that the LEGO part covering the LED? Where can one find it?
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plenty of air flow there
Yes, found it in my sons big box of lego.
Yes, the Nait 50 performs noticably better with tha tall legs than the standard height I had before.
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There are other ways to cover the bright LED on the Nait 50âŚ(Click here)
Itâs just a triumph of design. The care and attention paid to every detail as offered by @110db highlights the best of UK engineering and also has that human idiosyncratic element. It still looks so cool after 40 years and sounds amazing to boot. 
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Fab picture of your N50..
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Appreciate the heads up. I will keep an eye on it to see how hot it gets. The Spendorâs are 90db and 8ohms (minimum 5) so arenât difficult to drive.
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Just for information ,the Nait was released in 1983,kindly.
Good point!
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Sure, to be fair I wouldnât say the case has ever got hot, but has noticeably warm if you follow me.
I would have thought that the audiophile community would love the detailed engineering input. Perhaps it should have been used more in the marketing of the productâŚ
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Albeit if used non technically in marketing collateral it could be mis understood and taken out of context.
But a soft technical publication like a âwhite paperâ style publication for a product stating these aspects could be useful. Or perhaps simply an annex in the instruction manual (where I would expect to see this) would be more consistent.
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