GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: The European Triode Festival’s horns

Post Subject: It is much better.Posted by Romy the Cat on: 9/7/2009

Well, it unquestionably much better, still I am afraid that they are trying to spread one ass across two chairs; I will talk about it in the end. The change from what was before was around the frame and upperbass horn. It looks like the guys are trying to shape it as some kind commercial speaker.

The new frame is very elegant with a minor question: it is an optical illusion or the MF horn is tilted toward to bottom? If the MF and HF horn are parallel in this frame then the frame is great.

The Midbass horn is interesting. They moved from the huge-throat duplex horn to angular-entry twin-throat. I personally think that I you are so insist to use the double drivers in throat then this type of entry is preferable as it makes the cross-section of the composite throat sampler. The minor reentry effect and the time misalignment in front chamber is controversial and I do not think anybody ever looked in it with respect to sound. It is was mine I would play with triangular phase plug in this throat but it just a speculation and I have no idea what it would lead. The key would be to get a more or less proper impulse response from this type of horn…

The horn is still obviously too short to feet my evangelistic shoe but then do something different. The keep the back of the drivers wide open, letting then to ask in semi-dipole configuration. There are of course many problems with this solution as itself-contradictory arrangement but it all would depend from what kind drivers they are. With selection of very proper driver and with VERY smart high-passing of this thing it might work. So. it needed to be heard in order to evaluate what kind upper bass and lower MF the new “La Grande Castine“ are able to. Setting this configuration to go deeper into midbass will screw up lower MF and vice versa. It would be interesting to hear from Musique-Concrete folks what they think about it and if they from their point of view were able to deal with the problem.

Also, the “La Grande Castine“ is what I call the “MF Horn Island”, it is not a self-contained system as it is very much closed-bottom system (ails they use woofers with very low resonance, deep into midbass and then harvest all problems at lower MF and upperbass). So, what the complimentary LF section the “La Grande Castine“ use? If this speaker uses an extra help from bass section then he type and the crossover type in this section shall say a lot about the capacity of the “MF Horn Island”. So, far I did not see any mention of LF section. If they are not planning to use a separate LF section then… they need to coals working on this speaker.

The Cat

Rerurn to Romy the Cat's Site