well i'm certainly not that hopeless to argue with a manufacturer of head amps what is better: a SUT or a head amp.
4/ Head amps are also far less fussy in getting minimal mains hum than SUT's.
maybe you're right, if you stuck a SUT into mains...
Gordan.
Speakers: Oris Swing MkII
Amps: Thomas Mayer 300b/ Hiraga La Maison de L'Audiophile 20
Preamp: Silver AVC by eng. Ferenc Lazar
Phono Preamp: Shishido LCR by Solaja Audio
Decks: Garrard 301 Martin Bastin reworked/plinthed with Fidelity Research FR64fx
Garrard 401 in eng Ferenc Lazar solid wenge plinth with SME 3012/2
Cartridges: SPU Spirit/ Koetsu Black revisited by eng. Salai/ Miyajima Shilabe
Step Up Transformers: Tango MCT 999/ Ortofon T-5000/ Lumiere SUT
Digital: Shigaclone by eng. Ferenc Lazar with Lampizator Amber II
Wires: of sufficient length