These Danes at Purifi are arguably the leaders in driving the state of the art, and its pretty nice that they are sharing bread board mockups with visitors and maybe they do put out a rug for the shop dog? Those floors do look cold.
Maybe the little boxes in the back right are some music sources in digital storage? Purifi and Hypex are the top dogs of digital after all. No vinyl or CD's are lying around and they have a fancy Mola Mola dac in the center.
This thread is about the PTT8. Do you think the Mundorf AMT25CS is the best possible companion for the PTT8 mid-woofer? Would you go 2 way or do you think you could get more performance from a 3 way? These are expensive drivers, but if you dream about having SOTA drivers it seems like you should just make an all out assault on performance and get the best drivers you can, with the only constraint being reasonable size like 50 liter boxes and being easy to build? I have a big room and occasionally listen at rock concert levels in the mid-field so I am looking for something with some oomph.
As Purifi used a Mundorf AMT for the SPK5, I am pleased with the overall performance. Amir’s main complaint was over the bass balance and that is remedied with different port tuning. Directivity was pretty good and so is a decent design once you fit the crossover inside! As the Crowe design shows, you can make a 2-way work nicely with a properly designed waveguide. Multiple PRs across the back is an accident waiting to happen imo though. In the end, as a 3-way can get good directivity and hopefully forgo the waveguide, seems the better compromise. A Purifi tweeter might change my mind if it can reach low cleanly.
Below is another take on a PTT8 speaker. May have already been posted. It's interesting that it is horn loaded. I would be really interested to know what Lars Risbo thinks is the best set up is for this new driver, I assume it is the Mudorf AMT tweeter.
Speaker Design Study Using New Purifi 8" Woofer
DIY Plans No.1736 Purifi is a high end driver manufacture located in Denmark. Purifi is in the process of releasing their new 8" woofer, model PTT8.0X04-NAB-02. Purifi reached out to me and asked me if I would be interested in developing new DIY speaker plans for this new driver. This plan would...josephcrowe.com
The tweeter of choice is a TBD compression driver. Hard to comment much more without knowing specifics. Should help with low-end power handling though. Also not clear what he is charging for the plans but his other prices seem reasonable. Last I checked, he is a forum member, so would leave specific questions to him. Is the guitar included?