|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
64.105.104.128
In Reply to: RE: Design parameters I hold dear... {Lynn Olsen} ... posted by Cleantimestream on September 03, 2014 at 18:00:46
It looks like I've been preaching to the choir ; ) K Horns, with their sealed reactance-annulling back chambers, should present a more stable load to an amp than the Forte's, as long as the K Horns are in a corner. Those german guys probably did their test the old-school way with an oscillator, test box, multi-meter and graph paper. In the present time we have Room Eq Wizard (REW, which is a free download for Mac and PC) and, along with a simple DIY test box, it can do an impedance graph in some 30 seconds or so. I would expect the test results between the K Horn and the Forte's would be similar to what the German test found.
Paul
Follow Ups:
There is nothing, I repeat, nothing... that recreates the bottom end like KHorns ... in the right room... many others disagree... perhaps I just hear things differently... the only downside is when they run out of steam/punch around 375 hz.
The Mind has No Firewall~ U.S. Army War College.
Edits: 09/05/14
For life like dynamics it takes a horn to catch a horn. If you get a chance you should hear one of the horn loaded sub woofers like the Edgarhorn Seismic, or Tom Danley's Labhorn or Tapped Horn. The only direct radiators I've heard that can run with them are the thirty inch EV 30W, and Tom Brennan's former dual JBL 4648 sub rig.
Some K Horn guys go with JBL mid drivers. I had some JBL 175's on test some time ago. There was a problem with one (apparently the diaphragms have to be hand tweaked with an oscillator) but the other one went down to 400 Hz on my home made tractrix horn (with similar dimensions to an Edgar "Salad Bowl" mid horn). I've heard some K Horn replicas run with TAD's on LeCleach mid horns which sounded very good. The crossover region between the mid and bass horn is always a challenge with a K Horn as you can't easily get the woofer and mid drivers aligned in phase unless you use digital delay. And you loose power handling capacity crossing over that low too of course, but that's probably not a problem if you're using low powered tube amps, which gets us back on topic here.
Paul
Are you saying the realm above 375 Hz is problematic?
Yes Sir, the horn loaded woofer simply runs out, I can hear it when my Horns were configured stock, I have heard that problem was solved with the Jubilee.
The Mind has No Firewall~ U.S. Army War College.
Edits: 09/06/14
In my opinion K-horn with the right driver (I used Altec 803A) has a phenomenal midbass. The performance with K-33-E is only passable and the potential of the cab is mostly wasted IMHO. K-horn will never do bass ,(it will boom along with K-33E) and by the nature of the beast everything over 200 hz will be compromised but 50-200hz ? -out of this world !I sorely miss it .
Rgrds, W
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: