After I published Greg's Vermillion cable review, "thank you very much for the next great review. You caught the spirit of the cables very well. Indeed I like big bold dynamic sound extra present in the room but with a bit of softness and musicality so that the harshness is on the edge of being but not really there. That's also how I have voiced Cobra. I've been listening to that speaker for the last 3-4 weeks and every day make a small change to the crossover but after a few hours always return to the default values so now think that I cannot do any better.
"The official Cobra premiere will be at the Warsaw Audio Video Show 2025 starting October 24th."
After sampling several tiers of ClarityCap, Duelund and Mundorf, what coin-calamitous cocktail did Greg have Cobra chug? One popular Polish adult drink mixes Zubrowka bison grass with Krupnik honey vodka liquor and a touch of apple juice for liquid apple pie. It sounds fruity and sweet but kicks hard. Here is Grzegorz with his finalized Cobra poison.
"The crossover remains 2nd-order on both ends, with a transition at ~2'200Hz. The components are quite the cocktail. For the active Dayton mid/woofers I run Jantzen Litz-wire coils and ClarityCap PUR caps which provide excellent depth and organic midrange presence. For the AMT I selected Jantzen Amber copper caps due to their extremely neutral natural sound which pairs perfectly with the Mundorf tweeter. The resistors attenuating it are a combination of Mundorf copper-nickel and PathAudio. I appreciate Mundorf's resistors for their open energetic sound even if they can at times get a bit too intense.
"To balance this I integrate PathAudio resistors which offer a richer more organic sound. Therefore the three-step AMT regulation runs approximately 10Ω of constant resistance from PathAudio whilst each RCA position features a different Mundorf copper-nickel resistor to achieve the final padding value." From this we appreciate that rather than by jumpers or pot, Cobra's tweeter adjustments execute with three RCA plugs for the short tweeter lead.
Whilst being under the weather with a bug his kids brought home from school, Greg experimented with different surface textures.
"When it comes to Cobra's structure, the elongated cubes stack and separate with TPU spacers. The internal reinforcements of ring support for the Dayton magnet and braces for the radiator baskets which I experimented with remain. The crossover fits between the lateral radiators. Because my capacitors are enormous, the crossover splits into two parts. The AMT filter goes into the upper box, the mid/woofer crossover into the lower one. Even though initial cabs are printed, I spent the last few days exploring other patterns. Why not use the 3D printing process to create some stunningly beautiful and interesting finishes? So my printers are running 24/7 to create physical samples to pick from. I already have a favourite so may want to redo your samples. In that case you'll have to wait right until the Warsaw show."
By mid October, "tomorrow the Warsaw demo pair will finish printing and I can check that everything fits perfectly without needing adjustments. Then it'll be another five days to print your samples." The photo which accompanied that note shows off novel slot traps to scatter some of the main driver's rear energy coming off the cone between its basket stems.
