Luckily I enjoy my vinyl system as is...but I appreciate any ’tweaks’ / upgrades that work. Thank you for our group conversation / education on maybe adding a SUT.
FYI My Unison Research ’"Unico" integrated amp is the first version sold, with 2 tubes and a wireless remote. Volume Level 4 out of 10 is enough for me. I upgraded the tubes to Mazda’s PLUS had two levels of modifications done - they clearly improved the overall quality, detail and soundstage of the audio to me: https://6moons.com/audioreviews/unison2/unico.html.
Unico Mods:
- Three sheets of SoundCoat chassis damping material to the inner chassis
- 2 premium mil-spec, ultra low noise/microphony Mullard CV4003/12AU7 designed for 10,000-hour operation
- Two Multicap PPFXS polypropylene film and tin foil inter-stage coupling capacitors
- Two 1uf Auricap metallized polypropylene preamp input coupling capacitors
- Twenty Japanese Riken 0.5- and 1-watt signal path carbon resistors with gold-plated leads
- Two feet of DH Labs Revelation Series pure 99.999% silver solid-core input signal wire with Teflon tape-wrap dielectric
- One pair of premium Vampire direct gold-over-copper-plated RCA female jacks
- Four WBT 0763 single output binding posts
- TRT WonderSolder used throughout
- 8 Vishay-Telefunken SF4007 ultra-fast soft recovery diodes to rebuild two existing bridge rectifiers
- 6 Black Gate electrolytic capacitors to the power supply
- Two custom-made Burr-Brown OPA-627 opamp-based PCBs to dramatically upgrade the amp driver stage
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