My Initial impressions of the mini T2. Listening on my stax 007a mk2, normal caveats apply. There is no point comparing it to the Stax srm007 its like comparing a Bentley to a slug. Compared to my hi-amp alpha centauri there is also no competition. The mini T2 out does it in every department as does my Blue Hawaii. I will compare the mini T2 to the Blue Hawaii
(mini t2 (golden ref HV and LV, kevin gilmore synchronous rectifiers in the LV tkd volume, cardas hookup wire, groove tubes el34s, electro harmonix gold pin 6922s, simulated single box - transformers piled on top of each other 😞)
(blue hawaii, (golden ref HV and LV, kevin gilmore synchronous rectifiers in the LV tkd volume, cardas hookup wire, groove tubes el34s single box)
The t2 has more smoothness, and yet more detailed and faster treble with a little more sparkle than the BH. The treble speed is not done via a bright hardness but rather its just fast and articulate and is very musical and "valve like". Mid range is equally strong with more smoothness and more detail than the hawaii. Bass is good, not necessarily much better than the blue hawaii, perhaps the BH goes deeper but the mini T2 is again more rounded and smooth. I think the upper bass is better on the mini t2 which partly makes up for the slight lack of depth. The mini T2 does not shout or dazzle, its just fast and natural. It makes you want to turn the volume up, not because its missing something but because it sounds like its not straining and just wants to sing.
Micro dynamics are much better than my BH, Macro dynamics are perhaps a bit more restrained than the BH but the compromise works for me because the micro is so much better then the BH. The mini T2 loves strings and acoustic music. I can’t comment much beyond this since I only listen to Jazz and classical. Image placement is like a blanket around the listener, the Mini has the ability to present the sound stage close to the listener when the recording is close. With the BH everything seems about the same distance regardless of the recording. When the recording has the sound stage further back the mini T2 presents a very wide, detailed soundstage but does not hyper focus on individual instruments, there is detail and yet the acoustic of the venue comes through. I feel the mini T 2is less analytical than the BH, interplay between instruments is better presented, its more musical and makes you want to play at whatever volume you want. there is much less of a volume sweet spot than the BH.
Some suggested listening for what this amp can do
Rodrigo guitar concertos academy of st martin in the fields philips - beautiful guitar sounds with detail and fantastic plucked strings.
Hank Thompson live at the golden nugget. - the mini t2 pulls off the orange blossom special without brightness and the level of detail shows you it’s a packed venue with gambling noises everywhere.
j c Bach trio sonatas on chandos - mini t2 shows the mid range warmth that the blue hawaii missing, the recording is on original instruments and can sound a little thin... no so with the mini t2
paul desmond bossa antigua, tape hiss is separate from the instruments, centre drums are articulate, it’s a warm sound but not dull or muddy. The sound is beautiful there is detail but it’s not thrown at you.
I am very glad I started this project - even though I had very little smd soldering experience. Everything worked first time no smoke no drama. Now all I need is some cnc machining for the case. the mini T2 consumes about 25W less than the BH and runs cooler too.
Conclusion, both the BH and mini T2 are very very good. Building a blue hawaii is easier - there is almost no smd parts and will be cheaper: one less psu board, less transformer windings, less valves and can be built in one box. But the mini T2 is better sounding..... If you have the time, money, skill and equipment give the mini T2 some serious consideration. Now I have to build a full T2 with modern components....
and finally a very large thank you to JoaMat for providing me the mini t2 boards and for his help and support during this build.
Best regards and happy building
James