GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: The African compression electromagnet drivers?

Post Subject: Interesting....Posted by Romy the Cat on: 11/19/2013

Kerry Brown wrote:
The RCA1428 is a great sounding driver on RCA multi-cell horns. Not that I like multi-cell sound.

Hmmmmm… If you feel that RCA1428 sound great in multi-cell then hat make it to sound different in single-cell? What I am saying is that I do not see any difference in driver performance between multi-cell and single-cell. A multi-cell, even 18 sections, if it properly made, is a proper exponential lording to the driver. Do you mean that in your assessment the RCA1428 sounds great with exponential loading but fail short with fast opening of tratrix or La horns? Anyhow, I am not competent to assess it one way or another as I never use them. I think the comments you made about RCA1428 sounds great or not great was in respect to the specific people use this driver in a specific applications. So, you commented about their application not about the driver itself.

Kerry Brown wrote:
There is nothing slow about my modified DCM50s. The B&C drivers are more detailed, and 'faster' than 375s but have way better low frequencies. I have never heard any driver that sounds better. In fact nothing I have ever heard even comes close.

If you feel that low voltage FC did not slow doe the transient response of the driver then you might run your output tube of your SET too ideal to compensate it. It is a legitimate way to deal with it, not unproblematic however as you lose power and a few other things. It certainly would be very interesting to hear it however.

Kerry Brown wrote:
From what I understand the only reason high voltage motors were used on vintage drivers has to do with the existing power supplies, not sound quality. In any case, my 14V drivers sound wonderful. Dramatically better than 375s. No kidding.

The power supplies reason is a urban legend. Sure there were some very cheap radios where FC of the drivers was integrated with choke of the power supply for plate voltage. For sure you do not reach that level of frugality in you hi-fi… The High voltage electromagnets does sound very attractive to me as all with no exception, including my own electromagnets drivers, did not sound right to me with having sunk transients being one of the many reasons. Remember the Congents? It was almost like hands covered with honey… Reportedly high voltage electromagnets are free from this problem. There was a brilliant guy from northern Europe who come to this site I think it was 3-4 years back. I do not remember who it was but he did what I did – converted drivers to electromagnets and was trying to make them to sound right. He reported that all problems were addressed with high voltage coils and his enumeration of the addressed problem was spot on. Id did not try high voltage myself but his report was very plausible in my view.

Kerry Brown wrote:
Maybe you should try a pair of stock DCM50s, I think you'd really like them.

Maybe, I do not have an itch to try anything new. I have quite unique combination of YO186+S2+Injection and I can only assure you that people out there have no idea how it sounds. I might be with my MF sound way behind the curve or a way ahead the crowd, I do not know, not do I care. So, far the MF that I get does fulfill my understanding how MF might/shall be. When I hear what people do out there I do not particularly appreciate it but frankly I do not invest a lot of time listening other people audio. This Thursdays an industry guy will be coming to my listening room for a listening session. If he after listening would tell me that smart people out there long time ago surpass the quality of MF that I have in my room and will be able to name the specifics then I might look at what is available out there. So, far no one complained, neither do I. I did not try anything else in MF for years. It is very possible that this new B&C DCM50 is very good driver. I am glad you like it and it looks like some other folks like it as well. I am glad that drivers are progressing. What would be fun if some crazy Bulgarian nuts would take that DCM50 and replace paper suspension to a very fine leather, that would be even more interesting…

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