a split tqwp speaker for my chipamp - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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
Reply
 
Thread Tools Search this Thread
Old 12th November 2006, 09:00 AM   #1
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
Default a split tqwp speaker for my chipamp

To everybody on the forum,

As a job, I work with children(10-18 years old) and one day (about a year ago) I decided to do some nice "handwork" with some kids. So I have to design a simple to build loudspeaker and a chipamp for them. For now I'm convinced that everybody can build these speakers because all the kids, girls and boys in the age of 13-15, have now finished the project. There is one little problem : the finished speakers don't get to the children's own room; most parents ask me for the drawings to build them for their own use and until then they want to keep the children's speakers . Which means to me that they are fun and sounding pretty good.
I will post some pics on the forum, because they are easy to build and will work with a lot of 5 inch speakers ( I putt a lott of effort in creating a full range out of a bass speaker but didn't quite succeed) I tried several speaker units in the boxes.

Hope everybody has some fun.

Dear moderators ;

I do hope that this thread is allowed on the chipamp forum.
My basic idea was ; That it is quit on the forum, so some synergie design probably give a bit of live back to the forum.
We did try a Philips class D Home theatre amp but the speakers sounded a lot beter with a chipamp ( basic NI Lm 1875)
Attached Images
File Type: jpg spl tqwp sketch.jpg (10.5 KB, 271 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:02 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
Another pic
Attached Images
File Type: jpg all wood spl tqwp.jpg (59.6 KB, 265 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:05 AM   #3
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
Test setup ; mini chipamp, lm 1875, and sony minidisk
Attached Images
File Type: jpg p1000078.jpg (16.3 KB, 246 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:07 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
speakers I tried : B110B, Seas p14rcy, car speakers , small 3 inch visaton, and severat others.
Attached Images
File Type: jpg car sp 1.jpg (14.7 KB, 222 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:09 AM   #5
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
small visaton ; sounded very well ; more bass then you can imagine !!
Attached Images
File Type: jpg visaton 3 inch.jpg (15.3 KB, 219 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:13 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
We did some measurements. Used a Technics freq.anal. and a realistic soundlevel meter.
We all heard no distortion with peak levels up to 100dB/1meter.
Freq. pic. added.
Attached Images
File Type: jpg tech full.jpg (16.5 KB, 192 views)
__________________
Leon
  Reply With Quote
Old 12th November 2006, 09:24 AM   #7
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
tweeter setup box , only 2,2uF and 3,3 ohms in series.
Attached Images
File Type: jpg tweeter setup box 2.jpg (11.7 KB, 214 views)
__________________
Leon
  Reply With Quote
Old 14th November 2006, 12:20 AM   #8
CarlosT is offline CarlosT  United States
diyAudio Member
 
Join Date: Oct 2006
Wonderful project, Leonidas. I'm doing something for the kids, too...a retro vintage Fender look cabinet with a single Audax 5.25" coaxial powered by a single LM3875 GC kit. My biggest problem now is deciding on the best approach to sum the stereo channels from the iPod into one mono input.
  Reply With Quote
Old 14th November 2006, 12:22 AM   #9
CarlosT is offline CarlosT  United States
diyAudio Member
 
Join Date: Oct 2006
The cabinet internal dimensions are approx. 8" x 4" x 12" so a very cool little compact thing. It will be aligned in a classic BB4 boombox ported alignment and the F3 cutoff will be a very low 51 Hz.
  Reply With Quote
Old 14th November 2006, 11:47 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Eindhoven
Hello CarlosT,

Very satisfied, myself, after working with kids.
Any pics or drawings of your project??
Why don't you try the mono(just one lm3875)?
There also is a lot of stuf on the forum : how to bridge chipamps.
You can perform a search.

Whish you a lot of joy with the kids!!
One problem I had was working with 230Volt,
I decided that they could do everything on their own , ecxept rhe seperate case including the tranny.
This part had to be inspected by me , before they may use it. Just for safety reasons.

If I can be of any help, just let me know !
For children (and adults who are trying to inspire children)I'm always there.

One more pic of a modded speaker, very useble as full rang and guitar use.

Good luck, Leon
Attached Images
File Type: jpg phase plug.jpg (53.3 KB, 103 views)
__________________
Leon
  Reply With Quote

Reply


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
GC Speaker Cable (split from NJAGC) Nuuk Chip Amps 28 5th July 2004 02:25 PM


New To Site? Need Help?

All times are GMT. The time now is 10:00 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2