Analog room correction for vinyl

@mijostyn First i don’t care about digital, i use analog only, no digital crap, i am a record collector, so vinyl only. I use what people are using in production room aka studios around the world. And i proceed with complete room analysis with Vicoustic, which is the manufacturer of the acoustic panels in Portugal (just like Gik or RPG in the USA). I also watched a lot from Acoustic Fields on youtube and i think Dennis did a great job to explain nearly everything in his videos, there are many interesting topics in his channel. However, i don’t want to transform my room into something ugly, so i’m using acoustic panels (absorbers, diffusers) that looks cool. I took some pictures when a first bunch of acoustic panels appeared on my ceiling and wall, now i have much more. I got panels for side walls too, but not mounted them yet. It is an interesting process and improvement is noticeable. Actually vicoustic charge only $50 for room analysis and everyone can apply online, but precise measurement of the room with all the furniture is necessary along with the images to get a 3D model. It was stupid to ignore it, i got 3D model and recommendations about exact placement of the different panels in my room, also all the acoustic measurements to compare (before and after). They are using special software to do that. It was very cheap and very helpful!

I recently find a huge manufacturer in China, wooden QRD diffusers can be ordered from them and the price is so cheap compared to similar products from American companies. Maybe i will order from them, it’s just natural wood. I think some US manufacturers order their panels from China. The manufacturer in China can do whatever i like, custom size is not a problem. 

Chakster, I collect records also. I hate CDs in their flimsy plastic cases. All my digital in on a hard drive. Like I said I do not care how much "crap" you put on your walls. You will NEVER get the same performance out of a system w/o digital control and any person with a computer and a calibrated microphone can show that to you in real time and I guarantee your jaw will drop 3 feet when you see what your system is actually doing particularly the difference between channels. If you don't want to learn exactly how "crappy" your system is performing and what little it takes to straighten it out fine but that does not mean others here don't want to learn about it. I can understand being a traditionalist. I prefer being an early adapter. As a hobby it is more fun. Like I said, with a little digital tweaking and a little room treatment you can throw all that other "crap" away. I apologize if you are computer phobic. We do have medicine for that:)  

I believe that Mark Levingson offered the Cello Audio Suite with lots of analog tone controls to allow room correction - tho an RTA would be required to do it right.  
There was also an early high end pre-pro from Theta that had a lot of analog tone shaping capabilities 

There seems to be quite a lot of dsp based room correction for digital but what are some analog solutions for vinyl systems?

There's a lot for digital because digital sounds so awful people are constantly incessantly running around looking for excuses and ways to make it sound slightly less awful. Oh wait, what's that? People are holding onto and loving and cherishing their digital gear for decades like they do with analog? No, that's not happening.

Another factor, its the numbers and graphs and stuff that sucks people into digital. Because it sure ain't the sound! Oh wait, what's that? The whole world is so convinced digital sounds good that when a record manages to sound pretty good they say it sounds digitally? No. They say digital sounds analog.

So anyway here's the analog solution to dsp with vinyl: adjust your VTA, adjust your VTF, adjust your speaker placement, move your subs around, move your listening chair around, try various acoustical treatments. If you were mislead into buying wire or anything else based on the band-aid (aka "system matching") approach, change them.

Not being smart. But if you are you will. This is also by the way the approach to take with digital. I mean, if you want to try against the odds to make it sound good, and not just look good on a graph.