Full Range Open Baffle and 5W triode - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 9th August 2009, 11:13 PM   #1
diyAudio Member
Join Date: Aug 2008
Default Full Range Open Baffle and 5W triode

Six months ago I built a set of Open baffle 10" audio nirvana full range speakers with a 15" H frame speaker powered with a parts express 250 watt plate amp.
My intention was to then build a 5-7 watt single ended triode amp to power the speakers. I settled on design by Tubelab.
Since the beginning I was very worried that it wouldn't play loud enough (amongst other worries-building it all).
I have it all together. without ultra-linear or cathode feedback, with el34's I am getting 104 dB peaks, with little or no distortion (could have gone louder- but I'm too chicken as of yet, it is the first time on for this amp.
I would also like to say that I have the plate amp up about half way on the gain, and am only using one 15" speaker in the H frame. I am quite pleased with the combination.
Listening room 24' X 13' X 8'.
dB measured at the chair 7.5 feet from speaker.
Audio nirvana high frequency tamed with a coil/resistor-Thanks to Mr. Pass
And thanks to everyone else with either your ideas or your responses to my questions.
  Reply With Quote
Old 10th August 2009, 07:23 AM   #2
diyAudio Member
Join Date: May 2008
  Reply With Quote
Old 10th August 2009, 09:04 PM   #3
diyAudio Member
Join Date: Sep 2006
Any details of the coil and resistor because I plan on using the 10" or the 12"?
  Reply With Quote
Old 11th August 2009, 02:56 AM   #4
diyAudio Member
Join Date: Aug 2008
In this forum, Nelson Pass answered my question. He has a program, and kind of offered me a student version (no charge) Regular version was many thousands of dollars!!
I didn't take him up on that! But he did recommend a coil and resistor in parallel both of which are in series with the speaker.
Coil 5 mH
Resistor 8 ohms
I used a wirewound resistor 5 watt, and a solen perfect lay 22 guage
(as it won't be seeing much or any bass, I thought the larger guage was a waste)
  Reply With Quote
Old 11th August 2009, 03:36 AM   #5
diyAudio Member
Join Date: Aug 2008
sides and top of h frame are solid maple. "Baffle" is 3/4 maple plywood
FR baffle is 1/2 in plexiglass mounted on a strip of maple with a dado cut at about 10 degrees (so that it leans back and doesn't fall).
Sorry only one pic as it took me forever to resize it so I could post it
Attached Images
File Type: jpg 100_1493.jpg (29.8 KB, 436 views)
  Reply With Quote
Old 11th August 2009, 02:41 PM   #6
diyAudio Member
Join Date: May 2008
nice works how did you mounted the drivers onto the plexiglass?
  Reply With Quote
Old 12th August 2009, 01:18 AM   #7
diyAudio Member
Join Date: Aug 2008
bolts, with a gasket of silicone "caulk"
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Open Baffle Full Range Speakers from Wal-Mart . . . loudandclear Full Range 61 29th July 2009 10:01 AM
Building full range open baffle? Glowbug Full Range 27 22nd January 2007 10:15 PM
For Full Range With Subs -- Sealed Box Vs Open Baffle ? DrDeville Full Range 4 21st January 2007 05:26 PM
Multimedia Satellites, Open Baffle?, Full Range? Driver Selection Help Required ozynigma Multi-Way 32 7th May 2004 03:29 PM
full range (open baffle) then_dude Full Range 15 9th March 2004 02:58 PM

New To Site? Need Help?

All times are GMT. The time now is 04:56 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2