DIY Biamp 6-24 Crossover

This is my second build. I went with a LPS with extra filtering. Front panel kicked up to match my Crowe speakers.

I needed help with a set of speakers, rightly blending them as best as possible. I saw this opportunity and knew that it gave me the best chance of doing so. The build was simpler than I imagined, so that is good, but there is a lot to know beyond the build and I am finding that even though I can do some of this by ear, I will need equipment to make it sure. At the moment the unit is in mule stage, but will be easy to mount it all in a chassis and make pretty. This choice of bi-amping is the best results that I have had so far with speaker building. FWIW, I did a sort of comparison as to the drivers that I might use, and ended up with a set of AMT4 ribbons that I can't tear away from.

Pretty easy build. Sounds great. Flexible.
It would be very difficult to dial this in by ear in my opinion. I used REW, and it took several hours of measuring and listening to get the crossover points, and levels dialed in. Also, as others have mentioned, the pots are very sensitive to adjustment, especially for level matching.
It is very quiet. I'm using it with a compression driver with a sensitivity of 113db, and I can't hear any audible hiss from the system unless I stick my ear in the horn.

Two boards were used for tri-amp crossover; low pass, bandpass, and high pass. What I am hearing is its excellence at what it doesn’t do, no sonic signature or smearing that can be experienced even with well implemented op amps. It performs its function divided audio frequencies to amps without adding or subtracting information from signal. Really happy with this xo.

This was my first successfully complete kit. It was very easy to assemble and provided a great learning experience. The success inspired me two try building the amp camp preamp. That was a successful project also. I have mounted them both on the bottom plate of chassis hat I’m modifying to enclose and protect them from curious fingers. After the chassis is done I’ll be looking for another project. This has been and fun and truly rewarding experience.

Using Nelson's 6-24 active crossover to biamp a system offers one of the biggest "bang for your buck" improvements available. While it took a fair amount of trial and error to adjust it to best suit my listening room, I now have a system that sounds like the best systems I've heard at audio shows, costing tens of thousands of dollars! If you were to buy a commercial active crossover of this quality, it alone would likely cost over a thousand dollars. Thanks Nelson and the DIYAUDIO team!!!

Very nice PCB. Easy assembly. Sound is very transparent. Excellent crossover

A great product - just what I was hoping to find. No complaints regarding the board that was supplied. Very good quality. I would like to weigh in on the discussion about supplying this product for Surface Mount Components. If the board were designed for surface mount, I would guess that there are many like myself that would not be inclined to attempt the build. Please continue with through hole products.

The 6-24XO gives you the chance to build an excellent sounding 2-way - active -crossover (stereo) on one pcb.
The kit includes well matched J113 - JFets for the buffers. No Opamps involved.
The pcb is of very good quality. Delivery was very fast (as well the german customs).
Great kit - your chance to go 'active'.....
Greets
Dirk

This is a super versatile active crossover! Slopes from 6-24dB/oct.! Also a bandpass possible.
I used it to actively cross at around 2.5kHz for a 2-way speaker. Sounds superb!
PCB of great quality. JFets very good matched.
Delivery very fast from USA to Germany (although there is the Pandemia).Good job DIYaudiostore!
Thanks Nelson Pass! This is a great 'sound-machine'
I go listen... Dirk

Fantastic crossover. I've used some of the best vintage crossover ever made, and they were very good but the simplicity and jfet goodness beats them all.

It's a great board. Easy to assemble. Worked first time. Does exactly what is says. Survived my amplifier blowing up. I needed to change capacitor values, so it could be worth fitting sockets for the capacitors as one or two others have done. Like all potentiometer volume controls in my experience, the input trimmers do change the sound quality so worth keeping them on max if possible.

Nice quality board. This is a great addition to the DIY community.

I configured this as a standard Linkwitz-Riley 24db crossover @ 80hz and used fixed parts (no pots). The results are great. I can't imagine much (if any) improvement from upgrading the jfets.

I had concerns about expecting to get consistent, long-term precise resistance values from a single turn 50k pot.

There was no included documentation, but lots of great online guidance. Thanks to all who have taken the time to help everyone out.

I had previously built opamp based crossover and this sounds noticeable better than those attempts.

Thoughts / recommendations:
1. include a detailed document, that includes changes needed for changing the sallen-key configuration to L-R.
2. It would also be helpful to have a calculator available to calculate the values for each (L-R calculator available from the ESP and other sites).
3. It would also be helpful to include a write-up to describe the benefits of each configuration.
4. Another nice option would be to have a nice DIY case available for the crossover through the DIY Audio store.
5. It would also be helpful to have the JFETs available for separate purchase.

I am very pleased with the results and will be recommending this solution to friends.

Very happy with the quick deliver and quality product
Thanks

Waiting for parts but quality of board and included parts is very good.

Yesterday I finished the creation of the crossover. Excellent product, even if I am now in the development phase I already have good satisfactions.
Highly recommended.
Thanks to you and Mr Nelson.
Best Regards

Like always a wonderful project to do and learn. It would be impossible to do this for people like me without the generosity of Mr. Pass and the DIY audio community.
Thank you again and again.

Very nice PCB and great analog xover with excellent dynamic, detailed and clear sound. Absolutely quite with no noise at all with 24 Vdc regulated PSU.

I build it for a friend of mine and for me. The results are fantastic. I compared it to the MIniDSP nanosharc board for driving Borberly amps Sonus Faber Cremona Auditor M as satellite and 2 x Ripol for the range below 100Hz. There is no point of discussion even if you use the Linear Phase and room correction function of the nanosharc. The analog Crossover is far better. My friend compared it to a Reckhorn Crossover which is a Operation Amp design. He got the same results I did. It´s a great kit.

i got this really fast. I haven't opened it yet as I'm waiting on Digi Key with a few back order items. This is the fourth item I ordered through the store and I've never been disappointed. I'm a novice at electronics, but these kits make it easier for me to enjoy this hobby. Of course it's the members generous help on the DiyAudio forums that makes this hobby so enjoyable for me. Thank you DiyAudio members.

Good idea, top quality.
diyaudio store ist best.
Cons, eu warehouse is missing. Vat + shipping is same price as diy-kit

With a lifelong interest in high quality stereo audio, and as a diy loudspeaker and amplifier builder, the diy audio store is GREAT for me. I don’t have an education in electronics, my knowledge of it is basic. So, kits are great for me! Especially if they are designed by audio heroes like Nelson Pass, the pcb’s and chosen components are of high quality and the building process is well documented. I was looking for a universal active crossover for a long time, so I was very happy when I found this kit in the DIY Audio Store! I haven’t build it yet, but I am sure it will be a great sounding cross-over. Keep up the good work!

This is one of those projects I thought I would never need. Since buying a pair of Full Range drivers, I needed a crossover to pair them with my subwoofer. I'm building a BA2018 preamp with the 6-24 Crossover integrated in the case, the PCB is small enough to fit in a small enclosure with BA2018 PCB. Best part of all, when I had a question on building the Crossover, it was Nelson himself who answered it.