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April 22, 2019, 03:05:41 AM *
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 on: April 20, 2019, 11:23:55 PM 
Started by Capt. Z - Last post by Capt. Z
Thanks Henry. I will keep my eyes on it. But at the moment I like the idea of being part of the making and slinging some solder.

 on: April 20, 2019, 07:53:25 PM 
Started by Capt. Z - Last post by Henry
Hi Capt., I recently saw some info for the Emotiva A-100 amp and it seems to be an interesting and affordable amp suited for flexibly powering headphones.  The reviews seem really good and being a fossil myself, the throwback nature of the amp is intriguing to me.

I know you are interested in a diy project, but I thought this may be something to consider since it can drive any headphone with its operating options and the switchable power settings (120v / 230v) could be useful for your situation.  It may be a good fit and save your fingertips from those pesky burns.  Smiley

Please let us know what you decide to do.

 on: April 20, 2019, 01:38:01 PM 
Started by Capt. Z - Last post by Capt. Z
Hi Gang;

I am looking for a DIY project for this upcoming summer. I've been doing a lot of headphone listening over the last few years. For most part I am using a small portable headphone amp and a Woo 3 OTL.

Headphones range from 32 Ohm Grado/Magnum to 600 Ohms 35 year old Beyer 990

However, I am itching to use my solder iron again to build something worthwhile. Thinking about building a SS headphone amp that has loads of slam and sounds 'fun'. Hopefully won't break the bank and can be bought in Europe.

Got any leads???

 on: April 17, 2019, 05:10:07 PM 
Started by Ed Schilling - Last post by Henry
Ah... fest time again.  I'll be there simply for the need of refreshing my Hindi (Leesville Lodge).  Cheesy

 on: April 17, 2019, 03:41:22 PM 
Started by Ed Schilling - Last post by 2wo
OK, Its looking like can make it, just waiting for a word back from Rich to cover for me. Not sure if I can get there on Thursday, we'll see...John 

 on: April 16, 2019, 10:47:50 PM 
Started by Henry - Last post by Ed Schilling
Henry, the "know it all" did not seem to realize that just because you xover the tweeter stupidly high you might have done it to keep the output below say 5-10k from being exaggerated all the while extending the top end above 10k out to inaudibility. I do not believe in "supertweeters". The T-90's job was to extend and flatten the response[/b] of The Horns above 14-15K where the 126 actually starts to roll off.

Numbers are funny things.............xover at 30K and 6db will be down 6db at 15k.......and the T90's are >100db efficient. I cross them high to lower the output in the audible range, not because I think I can hear to 30K!

 on: April 16, 2019, 10:35:07 PM 
Started by tooppy - Last post by Ed Schilling
Steve, hope your foot is better. Steve is correct as to my thinking........the efficiency of the pair also is damn near perfect. Another factor is the "bass driver" is a full range unit. This allows the series xover because of the extreme overlap the drivers have. A lot of stars aligned for the pairing to work as well as it does.

 on: April 16, 2019, 10:29:30 PM 
Started by Ed Schilling - Last post by Ed Schilling
Well, this has been a tough one. As the years have gone by HFest has degenerated (not a complete bad thing) into a party among friends. We just were not sure if we should do it again. Now, keep in mind, it was never about "selling stuff" but rather we just wanted to see the folks who have supported us and as an opportunity for some stupidity and fun.

So with that is mind...........yea, the house  will be open. The 1st weekend in May as it has always been (2-4th).

We'd love to see all of you who have come in the past and of course anyone else who would like to participate in a little audio and lots of stupidity and maybe a little fun.

I just got 8 tubes for The Beasts, have new Heils, and of course the best line stage on the planet and that is The Truth (pun intended)! Bring anything you want and we'll hook it up but keep in mind this year will be all about seeing folks and less about audio.............I would guess.


 on: April 14, 2019, 12:33:48 AM 
Started by tooppy - Last post by Steve F
Henry is correct.
The reason Ed’s design works well is the very low mms of the Fostex driver. Even most eight inch drivers really won’t match up well. You need a midrange.

 on: April 11, 2019, 12:44:46 PM 
Started by tooppy - Last post by tooppy
Hey Michel, ESS made a speaker with a large driver (10 in?) coupled with the Heil years ago and had issues with the low frequency driver being higher mass and sounding noticeably slower than the Heil.  That created problems with the two drivers overlapping seamlessly.  i see ESS has a modern version of the old speaker, so maybe they have addressed that issue.

Maybe Ed can offer some wisdom here...

Henry, thanks, I didn't know that story, wait and see if Ed has any comment on this.

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