Andrew Quint Reviews the Unique BACCH-SP Stereo Purifier

[Sharok]

I have a pair of Polk L800's and just Demo'd the BACCH-SP Appliance at Axpona 2024. I spent most of my time in that room. The L800's had a wider sound stage which is likely because they are projecting sound outward AND because I have to toe-in the L800's a bit because I have them farther apart (7'). The BACCH-SP was more immersive and had head tracking.

However, The BACCH-SP set up was

• speakers were closer together than my L800's 5' vs 7'
• speakers were closer to the listening position 4' vs 8'
• I'm sure he was using very directional speakers where as I'm unsure of the directionality of the L800's
• His room was untreated and small, my room is treated fairly well
  • he very modestly "treated" the hotel room side walls (like 2" absorbers or less) vs I do not treat my side walls;
  • However, I have 16 2'x2' 4" absorbers on my back wall
  • His seats had space behind them vs I'm close to the wall
  • His seats had no headrest, mine have a head rest

XTC is fickle and worth every inconvenience but requires a lot of experimentation which I've found very rewarding for this hobby.

I tried the uBACCH VST version and was not able to make it sound better or even very effective but perhaps I was listening for the wrong things. I also had someone convolve a track and gave him dimensions and it did not work well. I'm left to assume that the VST is simply not as good as BACCH4MAC/BACCH-SP or my room is not as good for BACCH4MAC/BACCH-SP.

Problem with experimenting is that I'd have to buy and set up a Mac Mini plus buy $1000 in software OR if I really do need the upgrade for measurements (which I like the idea of measuring XTC, I haven't figured out how to do that in REW) then I'm looking at a $740 restock fee if it doesn't work as well.

I'm a home theater guy and fitting that into a home theater chain would be difficult. The BACCH-SP (despite being out of my budget) has estimated 30ms of latency (per Edgars guess) which would be after my AVR meaning it would tear up the distances and perhaps not work at all for video syncing...

So again, I loved the BACCH set up at Axpona and I think I liked it better than my L800's but I like the L800's better in my room and they fit within the home theater set up vs the one uBACCH VST that I've tried.

I plan on giving BACCH another go because the immersion was better.

Does anyone know those whisper and counting tracks he uses for demo's? I can't find them and I want to test them out. Yosi Horikawa's songs "Fluid" and "Timbres" were a revelation on his set up.

What’s the maximum output sampling rate after applying ORC?

Thanks

 

[tjcinnamon]

What’s the maximum output sampling rate after applying ORC?

Thanks

Not sure. I don’t own it but I wish I would have saw this this morning and could have asked Dr Chiurie at Axpona today!

Certainly not an opportunity I get often

 

[Sharok]

:-(
I emailed them and asked
I hope th

Not sure. I don’t own it but I wish I would have saw this this morning and could have asked Dr Chiurie at Axpona today!

Certainly not an opportunity I get often

:-(
I emailed them and asked
I hope they’d reply

 

[Sharok]

Not sure. I don’t own it but I wish I would have saw this this morning and could have asked Dr Chiurie at Axpona today!

Certainly not an opportunity I get often

FYI:
I got an answer
It does not change the sampling rate. If you feed a 24/192 signal, after applying the "ROC" the output is the same (24/192).

 

[Gwreck]

Has anyone heard more about the BACCH-DRC^2. There were some short clips from “the audiophile junkie” on YouTube but that’s it. I think there was a mention that the price was $19k but I’m not sure what that includes.

BACCH-DrC2

BACCH-DrC2, The Ultimate Desktop Audio System.

www.theoretica.us

 

[slaweks]

Interesting. I wonder if they are going to produce own tower speakers too.

 

[doorofnight]

David Chesky Said It's the Best System He's Heard His Music - Bacch DRC2 Demo at Axpona 2025​

[youtube]

 

[Dialectic]

I formerly used my KEF LS50s on a desk, and it didn't work for me. The speakers made the very heavy desk vibrate, so I got some IsoAcoustifcs stands to decouple the speakers from the desk. While mitigating the vibration of the desk, the isolators made the speakers wobble wildly. Subjectively, I found the sound less than satisfying.

After this experience, I am skeptical of any desktop audio system but would love to be proven wrong.

 

[Gwreck]

I formerly used my KEF LS50s on a desk, and it didn't work for me. The speakers made the very heavy desk vibrate, so I got some IsoAcoustifcs stands to decouple the speakers from the desk. While mitigating the vibration of the desk, the isolators made the speakers wobble wildly. Subjectively, I found the sound less than satisfying.

After this experience, I am skeptical of any desktop audio system but would love to be proven wrong.

These speakers should be different that a KEF as the diplomat planar driver should mean narrow dispersion and minimal interaction with the desktop. I had KEF egg speakers for my computer and the basically did not work with BACCH.