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Is an upper first bend reflector helpful for RCA Fan's 70Hz horn?

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Posted on September 22, 2015 at 22:43:52
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 hey RCA-Fan

if so, how large would you make the reflector?

how does this look? - baffle and lid are 3/4" BB, rest 5/8" BB

sketchup courtesy of Jesse Brunner


Karlson Evangelist

 

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RE: Is an upper first bend reflector helpful for RCA Fan's 70Hz horn?, posted on September 23, 2015 at 09:34:54
RCA-fan
Manufacturer

Posts: 801
Location: Ontario
Joined: July 26, 2003
 Yes, and you can make it about an inch longer.
The bottom one is fine.
You will get more at 1kHz.

Bill

 

RE: Is an upper first bend reflector helpful for RCA Fan's 70Hz horn?, posted on September 23, 2015 at 10:20:45
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 an inch longer - what size would that be ?
Karlson Evangelist

 

mouth extension ?, posted on September 23, 2015 at 16:00:45
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 could a practical folding extension be made - say two hinged pieces on the sides then a trapezoidal piece to connect to those to form a larger mouth and more path?
Karlson Evangelist

 

RE: mouth extension ?, posted on September 23, 2015 at 16:44:42
RCA-fan
Manufacturer

Posts: 801
Location: Ontario
Joined: July 26, 2003
 No.
What happens is that there is a rising characteristic, negating the present response if you add a flare.

If you E-mail me I will send you drawings with the little angles.

Bill

 

RE: mouth extension ?, posted on September 23, 2015 at 18:13:34
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 thanks - can't find a working email as the asylum mail blocks unsolicited
Karlson Evangelist

 

RE: mouth extension ?, posted on September 23, 2015 at 18:52:33
Don Reid
Audiophile

Posts: 914
Location: Rural NW Georgia
Joined: February 2, 2001
Contributor
  Since: April 1, 2010
 Freddyi, It's nice to have back on the forum. Quite some while back you mentioned some health problems and not long after that you pretty much quit posting. I'm glad you are back.
I dream of an America where a chicken can cross the road without having it's motives questioned.

 

RE: mouth extension ?, posted on September 27, 2015 at 19:36:24
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 appreciate it - - -
Karlson Evangelist

 

vs Peavey FH1, posted on March 27, 2020 at 21:23:08
Gera
Audiophile

Posts: 244
Location: Illinois
Joined: April 23, 2000
 I use Peavey HF-1 (similar to LaScala). How does the RCA Fan's 70Hz horn compare?

 

VS LaScala horn or Peavey FH1, posted on February 2, 2024 at 20:42:10
Gera
Audiophile

Posts: 244
Location: Illinois
Joined: April 23, 2000
 any thoughts on how these will compare?

 

RE: VS LaScala horn or Peavey FH1, posted on March 1, 2024 at 06:28:49
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 When Bill rebuilt that horn he found a few response problems - so advised me on a build which was wider. Partly because I don't have a reflector at the first turn, my version gets a bit rough above ~350Hz. Its quite a bit smaller than FH1 - must go as deep. FH1, being bifurcated may be smoother. FH1 is a well braced horn - moreso than La Scala.

If interested -I'll try to dig through my email to see if there's a dimensioned drawing.


Karlson Evangelist

 

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