entdgc 68 Posted October 27, 2020 Hi to the Collective, Bit of an obscure question. Does anyone know what the crossover frequencies or response curves are for Keltiks. A friend has just bought a pair and wants to experiment with a variable external crossover. So looking for a good starting point. Disclaimer - I know nothing of electronic design but he does.... Thanks Share this post Link to post Share on other sites
TooManyCatweazles 386 Posted October 28, 2020 (edited) On 27/10/2020 at 13:48, entdgc said: Hi to the Collective, Bit of an obscure question. Does anyone know what the crossover frequencies or response curves are for Keltiks. A friend has just bought a pair and wants to experiment with a variable external crossover. So looking for a good starting point. Disclaimer - I know nothing of electronic design but he does.... Thanks I'm sure about one thing (after my dealer used his Keltik's for the Katalyst upgrade event): The best external Xover for a Keltik is an Exaktbox. Unfortunately, it appears like your friend runs his Keltik's passive. That's a long way to go from there. But a very scenic one Edited October 28, 2020 by TooManyCatweazles Share this post Link to post Share on other sites
akamatsu 1,238 Posted October 28, 2020 (edited) Keltiks are Aktiv only. So there is no running them passive. Being four way speakers, I would think the Akurate Exaktbox -I would be the easiest, and rather cost effective way of having them make sound that resembles music. Edited October 28, 2020 by akamatsu 1 Share this post Link to post Share on other sites
Moomintroll 249 Posted October 28, 2020 I’ve never seen any figures for the Keltik crossovers, but given the similarities to the original Isobarik, you could always start with the Isobarik’s Wikipedia page - https://en.wikipedia.org/wiki/Linn_Isobarik This shows crossovers at 375Hz and 3kHz. ’troll 1 Share this post Link to post Share on other sites
sunbeamgls 1,171 Super Wammer Posted October 28, 2020 Keltik Exakt crossover points: Bass to mid is 118Hz (seems unlikely, but true) Mid to Treble is 2400Hz 2 Share this post Link to post Share on other sites
TooManyCatweazles 386 Posted October 29, 2020 16 hours ago, akamatsu said: Keltiks are Aktiv only. So there is no running them passive. Being four way speakers, I would think the Akurate Exaktbox -I would be the easiest, and rather cost effective way of having them make sound that resembles music. I learned someting today 🙏 1 Share this post Link to post Share on other sites
entdgc 68 Posted October 29, 2020 Thanks to all who answered the original question. I have passed on the information to my friend as a starting point. We were both very surprised at the information in @sunbeamgls post - it seems the mid does a lot of work on the Keltiks! We will see how these values work out in practice. Thanks again. Share this post Link to post Share on other sites
sunbeamgls 1,171 Super Wammer Posted October 30, 2020 10 hours ago, entdgc said: Thanks to all who answered the original question. I have passed on the information to my friend as a starting point. We were both very surprised at the information in @sunbeamgls post - it seems the mid does a lot of work on the Keltiks! We will see how these values work out in practice. Thanks again. Me too. But remember in the Kaber that driver is mid-bass. Share this post Link to post Share on other sites
Peter_P 13 Posted October 30, 2020 1 hour ago, sunbeamgls said: Me too. But remember in the Kaber that driver is mid-bass. The midrange driver (SPKR 007/6) and bass driver (SPKR 007/2MS) for the Kabers had the same size, but different membrane and elektromagnets. Share this post Link to post Share on other sites
