How to design a high end crossover…


My joke as the sun rises…


Requirements for the casual designer:

$4k worth of reference premium inductors, capacitors and resistors just laying about…

Zero out speakers on manufacturers specs before 5 pm.

Add 1/5 of excellent bourbon, branch water, natch.

Test each driver on a, in the old days scope, Ha! 
Computer program or four…

Fiddle with 1st-4th level crossovers for each driver, in this case, in a three way system.

Play your favorite test tracks, Opera thru Rock, change X-over components, pushing and pulling, repeat till the sun rises, or the victim slays the opponent, (manufactures x-over), on the audio analyzer, then refine with the ear, (having been to every concert on that albums release), knowing what the artist intended…

Thank Mom or Dad for the leisure afforded to you to do this ad infinitem.

Love the newfound resolution…

Plan B: Make money, know when to quit, play with this stuff as you personal inside joke.

Wait for post to be retracted… Go to hammock…
128x128william53b

Showing 3 responses by teo_audio

Designing a good passive crossover requires making good driver choices in the first place and it’s all about the ’the slide area’, as Ry Cooder might have called it. How much can you slide the crossover ranges around?

Or, the area of adjustment overlap. How linear and stable the drivers are in the crossover range, and how much overlap there is in the given frequency ranges. It’s an ugly task that takes time to master and it is all compromise, compromise, compromise.

A digital crossover is all compromise as well, with the major fault of being severely quality limited (brick walled) before you even begin. Best not go there.

So we’re left with active analog and passive crossovers, for those who seek quality in their gear.

As for costs, yes it gets quite expensive.

First, one can get to a linear space or place or minimal agreement spot, with inexpensive components....and then venture into the pile of expensive parts to test via. Then slowly zero in on the right spot, the best compromise. Zobels can be important, in my experience. lightly applied zobels, not over-damped zobels, can make a difference. I have a pair of those passive adjustable crossover boxes, which can really help in the initial stages. then add in expensive parts, then add in the premium parts and slowly dial it in. It can be months of time, if one does it right.

High end audio can be and generally is a ridiculously time consuming job with a requirement of extreme capacity in skills and whatnot.. with little room for reward at the end (re sales and the like). 

basically start with the vidsonix virtual crossover boxes, then move to the same but done as a 3/8ths mdf board with strategically located quality binding posts and ground runs, for a test system/board.  

then move to the premium parts on the test board, then move to the more final design and arrangement/layout of the premium parts, and then finalize it all in a single finished package, and then it's the final test run with the gear to be issued as product. Fixing any mistakes found, along the way.

Or something like that. It's a long process - to do it right.
What one ends up finding is that it can come down to the tweeters being in the top spot re importance in good design, and that there are only a small handful of ’best’ tweeters available, period. Like five or six of them. Maybe.

The rest are just compromises with little room for fitting correctly and are just flash in the pan one legged single hit wonders.

Where even the $300/ea tweeters still need to be torn down and re-assessed as to their design and build choices, where they are re-executed to a higher standard.

we see things akin to this in all other areas of endeavor and technology - the requirement to take the best in components and move each to a higher standard. Cars being a huge one..

Loudspeaker design is no exception and this should come as no surprise.
digital for loudspeaker crossovers is a sack of effluent when it comes to absolute quality attainable.

I can’t help if it one can’t hear or understand that. maybe one needs to go back a class for a year or two. or maybe find a way to up their hearing skill set. Hint: Projection does not work, but self assessment does.

Digital might work in the future when it comes to moving to the top spot in quality but it is not there yet and I see nothing in the immediate future that changes that assessment.

If digital for crossovers worked as some might desire them to, then all the best loudspeaker companies in the world would be issuing product that way--right now. Note they are not.

I’m sure the wiser among them are playing with digital crossovers...but that’s been true for well over a decade. Yet, nothing issued. They are all waiting for the technology to improve to be close enough to meet what passive design can currently do.

Simply put: not yet. Timeline: indeterminate.