You are very welcome.

There are five of these HFD4/5-S relays on the Tube 02 Pro circuit board. They are the cream colored rectangular blocks in the photo.

The HSD4/5-S signal relay (it is the white colored block shaped thing on the circuit board just below the RCA output jacks) probably has burned out. The purpose of this relay is to prevent a popping sound on the RCA output when you turn on the Tube 02 Pro. The /5 in the part name indicates that...

The heater filaments for the left and right tubes are wired in series. If the filament in either tube burns out, then there will be no audio output for the RCA outputs or for the headphone output jacks. Check and confirm that there is not any audio output for the headphone output jacks. If there...

This a nice and well organized collection of eartips. My collection is half this size. That is a really slick idea of printing small paper squares with the tip information which you have placed in each of the organizer boxes. What do you think of the ePro horn eartips? Were they useful for any...

I overlay several frequency response graphs in a graphics program. Each graph was normalized relative to my preferred tuning target. Here is an example:

This looks like a nice and simple solution for non-vented IEMs.

I prefer to average several squiglink graphs for a given IEM relative to my preferred and normalized target frequency response. I load the averaged graphs into the Peace GUI and then I perform my own parametric EQ for areas which I want to tweak. I don't use the delta 10 dB target since it...

Have you ever played around with the Peace GUI EQ interface for Equalizer APO? Are there particular things which you would like to tweak such as male vocals, more mid bass or more sub bass, or perhaps more simulated pinna gain for more details in the upper midrange? Fortunately the P8 has a very...

Nice. The spring tips perform pretty similarly to the TRI Clarion eartips in the way that you described.

Nice review. Harmon tuning definitely is not for me.

As I previously mentioned, tube socket pins 2 and 7 are tied together, making the this tube preamp compatible with any EF95 tube. I have been using GE 5654 tubes in my Tube-02 Pro for well over a year now. The Little Dot 1+ operates the plate and grid 2 at 144 volts, and operates the cathode and...

Does it have RLC crossovers?

The technical performance might depend on if Dunu is using RLC crossovers versus simpler RC crossovers.

I really like the graph, yet I would prefer a bit less bass tuck. The rest of the graph has dips in all the right places. I also like the nicely controlled rise for the simulated pinna gain. This should be a very non-fatiguing IEM to listen to. Thanks for sharing the info!

I saw a brief impressions video on YouTube earlier today. The bass doesn't hit as strong as the graph would suggest. Instead, the bass was described as super clean and detailed.

Thieaudio does put unique serial numbers on their IEMs.

I am using Azla SednaEarFitLight eartips with my Performer 5 since the hard inner bores help to preserve the details and since these eartips grip the IEM nozzles really well.

I have this cable with a 3.5 mm plug. It both looks great and pairs well with my Starfields. The cable is on the heavy side and is solidly constructed.