Phono Stage upgrade to complement Dohmann Helix One Mk 2

Dear @drbond : You are a gentleman that go where the " wind " " hold " you and change your targets as you can change your shirt. Nothing wrong with that because is what you show in the subwoofer issue.

Your main word about subwoofers was: trial and from there several changes to even disregard the Magico sub’s because its amps are class D and perhaps ( but I doubt because you have the kind of money need it for the Magico’s ) its price.

 

Now you are looking for a custom made sub’s and all your mind changes only for what you read through internet with out listen to any sub in your system or in a more or less similar room/system. Again nothing wrong with that.

 

Well taking in count your kind of mind about here are two truly good options for what you are looking for that I don’t tall before because I had in mind that " trial " you ask for. Anyway here it’s:

 

Krell Master Reference Subwoofer Subwoofers user reviews : 4.5 out of 5 - 4 reviews - audioreview.com

and here you can buy two of them:

 

Krell Master Reference Subwoofer (highperformancestereo.com)

 

and for you like to read:

MRS_man (krellhifi.com)

 

krell master reference subwoofer pictures - Búsqueda (bing.com)

 

If you dislike Krell then here other alternative:

 

Wilson Audio - Thor’s Hammer

 

If you want the crossover too then triel this one:

 

FM 330 Linear-Phase electronic crossovers - FM ACOUSTICS LTD.

 

FM 1811 highest accuracy in music reproduction. - FM ACOUSTICS LTD.

 

You can surround your choosed subs with FM Acoustics. Even custom made:

 

Professional Products - FM ACOUSTICS LTD.

 

R.

 

 

Fathom is another company that make expensive high end (or high end because expensive) subwoofers complete with x-over and amplifier. I's sure without looking that Wilson Audio do too.

Now and if you are really seriously about the full integration bass managdement then maybe what you could need is something " radical " as could be to put on sale your SL speakers in change for something like this:

 

MMSeven (evolutionacoustics.com)  and its specs:

specifications-for-group-brochure-4.pdf (evolutionacoustics.com)

 

or like this:

 

Mono & Stereo © 2023: Gryphon Audio Pendragon Four Chassis Loudspeaker system review (monoandstereo.com)

Gryphon latest model is : Kodo in 4 towers.

 

Both manufacturers choosed active bass management with no compromise at all.

 

Btw, M.Lavigne owns the MM-7.

 

R.

@rauliruegas 

Thanks for your suggestions.  I'm going to see what Duke at Audiokinesis comes up with.  He sounds like he really knows what he's talking about, and is interested in helping me get the best out of my Sound Lab ESL's.  He's also a Sound Lab dealer, so he's very familiar with what the speakers could use for augmentation.  It sounds like I'm probably headed down the custom-built subwoofer route.  Presently, we're looking for an amplifier / HPF combination that can work down to 16 Hz, which is low C.  (Yes, that is a key note in Bach's Passacaglia and fugue in c minor.)  

Presently, most every other component in my system is non-negotiable.  

As I mentioned about a week ago, you’re in good hands with Duke. You’ll be going to a lot of trouble to hear one lowest note in one piece of music, which I presume is emanating from a mighty organ pipe.