My ''TB3'' mini bipole plans

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#65
Don't use either. Its a simple matter to choose what resistor suits you best and then fix it. Just use longer wire from +in towards tweeter xover cap input, leave it hanging out of the port, make one cut, strip both new ends, solder resistors and listen. When the right value is established, cut the excess wire and solder the resistor on cap's input leg. Lpad is going to change the xover and a switch is not necessary in my opinion unless you are to be using the speakers for different systems, rooms and positions oftenly.
 
#68
Finally completed the TB3 and I really like the sound. I'm going to use in my office with modified SI amp and playstation. I used speakers salvaged from a blown Logitech 5300e pc system. Based on what I found on this forum these are Tang Band w3-594s. Don't know if they sound as good as the recommended driver but the price was right. I built the cabinet with 3/4 inch MDF shelving that I sprayed with rubber undercoat and top coated with satin spray paint. The baffle is made from some hardwood shelving I had laying around. Total cost of project was probably under $30. Salas, thanks for the help and a nice set of speakers.

Pich
 

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#69
Looks cool, I see it is the revisited version with the tweeter on the top.
Can't see well but it looks like the Audax cheap one, doesn't it?
Did you listen more to the TB3s by now? Any comments about their sound in more detail are welcome.

Cheers

Salas
 
#70
salas said:
Thanks for sending me the pics. I am happy that you find TB3 nice, and Hiraga worthy 🙂
I resized the pics and I am posting them here for all to see your speakers. I guess that the better tweeters enhance the clone.
Maybe they are silkier than the cheap ones on the original, and being just a bit less sensitive aswell you dont need to play with resistors as you have found.
After your speakers get more broken in and you have listened to more music, we will be happy to know details about your sonic impressions. Your system is revealing and it will be interesting to know more from your tests.

Cheers

Salas
Click to expand...

great looking speakers, only one has port...
is there a detailed demensions?

thanks,

gychang
 
#73
wim said:
Well, these nice, tiny, small loudspeakers sound very , very nice to me.

I like these tiny things a lot. Thanks Salas, for your help and your design.

All by all a very nice project!
Click to expand...

I saw your speaker pictures
1. what size is the tube?
2. when adding the tweeter, is there any electronic crossover needed?

thanks,

gychang
 
#78
For those using the TB3revisited on a desktop surface, here is the response in such use. Use your pc player's eq to even it out if you like.
Mainly reduce around 200Hz (the desk lifts some db's there). You can boost around 100Hz by 3dB too. Not lower, so to keep excursion under control.
 

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#80
A minor component change.

Hello again.

I recently had some critical comparisons to do, and I used the TB3R among other stuff. Well, this mini continues to amaze me. I had the opportunity to measure it free without wall reinforcement and high standing also. I just fixed its attenuation resistor value for the Audax super tweeter securely, since I was sure about some system parameters. It was a 3.3R//1R=0.77R. It jumped to 1R. Just remove the 3R3. In any case you need a 3/4 inch 8 Ohm nominal, 90dB sens tweeter, and it will work with that circuit.
 

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