Dx TriAmp bass unit - Page 13 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 20th October 2009, 08:41 PM   #121
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default A forum friend, made the kindness to send me the software to build

active filters.

Let me know if you want it Gaetan.... around 3 Megabytes.

with the filter i can produce, easier, the active to test if they will sound better...i doubt a lot...but childrens (listening tests) will decide that stuff.

It is Filter Pro from Texas Instruments.

regards,

Carlos
Attached Images
File Type: jpg Filter pro.jpg (219.2 KB, 144 views)
File Type: jpg Filter pro from Texas.jpg (461.3 KB, 137 views)
__________________
DxS, the best from the best...the cream from the cream, the best wide world ever made audio amplifier.

Last edited by destroyer X; 20th October 2009 at 08:45 PM.
  Reply With Quote
Old 20th October 2009, 08:47 PM   #122
diyAudio Member
 
Nico Ras's Avatar
 
Join Date: Nov 2005
Location: East Coast of South Africa
Carlos, I don't rate me or you as audiophiles, simply because we listen to music how we like to hear and enjoy it.

Audiophiles listen to the equipment and need to prove to themselves it sould sound nice, but I sometimes don't think that they enjoy music, they enjoy sounds.

Neither of these religions are wrong, one is a little more radical than the other but it is what you believe is right for you.
  Reply With Quote
Old 20th October 2009, 08:52 PM   #123
diyAudio Member
 
Nico Ras's Avatar
 
Join Date: Nov 2005
Location: East Coast of South Africa
Geatan/Carlos,

don't you think passive filter is better, but adjust the amplifier gain a little to compensate for insertion loss. The losses in a passive filter is only 1 or 2 dB in the passband.

Besides passive filters do not generate noise, active filters does. In my set-up I started with active filters but at high levels I could hear the shhhh during quiet passages.

I changed to passive and adjusted the amp gain 2 dB up and there was no more noise. If you consider noise figure, the first stage is what determines the major noise of the system.

Kindest regards

Nico
  Reply With Quote
Old 20th October 2009, 10:16 PM   #124
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default I have tested without the 10 ohms ground lift resistance..the lifted ground to the

input signal and i could listen noise too... them i have inserted the resistance back to place...in the reality i have removed the short i have made with wire across the 10 ohms resistance....now the noise reduced a lot..... hard to listen..i have to lift the volume all the way up and go 50 centimeters to the tweeter to listen.

regards,

Carlos
Attached Images
File Type: jpg Noise and gain.jpg (205.0 KB, 118 views)
__________________
DxS, the best from the best...the cream from the cream, the best wide world ever made audio amplifier.

Last edited by destroyer X; 20th October 2009 at 10:22 PM.
  Reply With Quote
Old 20th October 2009, 10:30 PM   #125
diyAudio Member
 
Nico Ras's Avatar
 
Join Date: Nov 2005
Location: East Coast of South Africa
Okay what is your point or is this related to an earlier post?
  Reply With Quote
Old 20th October 2009, 10:35 PM   #126
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Noises....i found the noises can be reduced by the lifted ground

but of course, not to producing, not to generating, not to use active may be more interesting.

The lifted ground, by itself can not be the medicine to noises..better not to generate them, not to produce them, not to use active devices, better go avoiding extra stages and so on.

You have agreement...i do not listen music.... i use to listen sound...also i play guitar but i do not know if Do, or Mi, or other tone...i just play the sound.


regards,

Carlos
Attached Images
File Type: jpg Listening sonics, not music.jpg (240.2 KB, 110 views)
__________________
DxS, the best from the best...the cream from the cream, the best wide world ever made audio amplifier.
  Reply With Quote
Old 21st October 2009, 12:42 AM   #127
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally Posted by Nico Ras View Post
Geatan/Carlos,

don't you think passive filter is better, but adjust the amplifier gain a little to compensate for insertion loss. The losses in a passive filter is only 1 or 2 dB in the passband.

Besides passive filters do not generate noise, active filters does. In my set-up I started with active filters but at high levels I could hear the shhhh during quiet passages.

I changed to passive and adjusted the amp gain 2 dB up and there was no more noise. If you consider noise figure, the first stage is what determines the major noise of the system.

Kindest regards

Nico
Hello Nico

Yes passive filter is better since no op-amp are in the signal path.

But somes passive filters can have phase anomalies problems and could be hard to get flat response.

Bye

Gaetan
  Reply With Quote
Old 21st October 2009, 12:53 AM   #128
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally Posted by destroyer X View Post
active filters.

Let me know if you want it Gaetan.... around 3 Megabytes.

with the filter i can produce, easier, the active to test if they will sound better...i doubt a lot...but childrens (listening tests) will decide that stuff.

It is Filter Pro from Texas Instruments.

regards,

Carlos
Hello Carlos

Thank, I did go at ti.com and there I did found Filter Pro.

I did have an old version of op-amp filter calculation but Filter Pro are better.

Bye

Gaetan

Last edited by gaetan8888; 21st October 2009 at 12:55 AM.
  Reply With Quote
Old 21st October 2009, 04:50 AM   #129
diyAudio Member
 
Ultima Thule's Avatar
 
Join Date: Jan 2004
Location: Koskenkorva Land
Quote:
Originally Posted by destroyer X View Post
...we have to take that drink around the swiming pool....do you remember?
hahaha you are right Carlos, and very good memory too, it's true we have to take that drink someday around the swimming pool with dancing chikas and Sangria, and when the Sangria is finished we will continue with Caipirinha until the sunrise... and your 3-channel amplifier tuned in with love will play Samba and Bossa Nova all night long, and after the party is over we will go inside and tweak the amplifier with more love for next night session!! hehehe

You know I was thinking about those CCS or resistors for the input differential stage, I was reminded once thinking I would use a huge resistor value and connect it to 1000 Volts source, actually I posted the idea here for a long time ago, I must one day try that crazy and dangerous idea! hehe

Cheers Michael

PS: If I come to Rio de Janeiro 2016 or another year I promise we will meet!
__________________
"If transistors are blueberries and FETs are strawberries, then tubes must be.. pears"
Michael 29th January 2010
  Reply With Quote
Old 21st October 2009, 06:56 AM   #130
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default heheheheh that's fine.

We gonna be waiting for you all folks, in Rio 2016...i promise and guarantee you will visit the second most pretty place in this world (first is Honolulu in Hawai)

Well...people say the world will finish in 2012..... december 22 i think, not sure..the Maya and Aztec calendar shows that day as beeing the last one.

We do not bother about what Maya and Aztec said.... their world already finished 500 years ago.... our world will finish, maybe drowned, because too much beer during the 2016 Olympic games.... people may have heart attack watching the girls passing by while sitted at Copacabana beach having beer and roasted sausages (wurst unt bratwurst, frite potatoes, sausage with onions and bread and baked frited provolone cheese and also some Calabrian sausage from Italy)...yessssss!

My memory is even better than the elefant's memory..sometimes they asked me things they forgot...mum gave me some medicine made using Cod liver oil when i was very young...i remember details while i was 3 years old and television advertising gingles from the fifties.

The 2016 Olympic games celebration vídeo drives me happy listening our drums...they are part of our Afro-american culture... those things are part of our genetic.

Cheers!

Hic!

Carlos
Attached Images
File Type: jpg Tira gôsto, food to have together beer.jpg (205.9 KB, 91 views)
File Type: jpg cheers.jpg (279.2 KB, 25 views)
__________________
DxS, the best from the best...the cream from the cream, the best wide world ever made audio amplifier.

Last edited by destroyer X; 21st October 2009 at 07:19 AM.
  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
Mission 720 bass unit repair Mark25 Multi-Way 27 24th January 2011 03:34 PM
Help for bass unit incloser pra3718 Subwoofers 4 23rd January 2009 02:45 PM
Cracked bass unit nfcgfm Multi-Way 3 17th April 2008 03:29 PM
Repairing bass unit in quad-63--HELP Williams Audio Planars & Exotics 2 14th October 2005 10:59 AM
Final 0.3 ELS bass unit and x/over systema Multi-Way 0 6th August 2005 06:56 AM


New To Site? Need Help?

All times are GMT. The time now is 09:29 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