Can 'ARTA' measure tube electronics? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 5th December 2008, 01:29 AM   #1
diyAudio Member
 
Join Date: Nov 2008
Default Can 'ARTA' measure tube electronics?

Hello all

I will be measuring my diy speakers. First I would like to test my equipment. I would like to do this as a reference. I would hate for a peak or dip to be non speaker related.

Will Arta allow these measurements, and what type of soundcard or special cable do I need?.
  Reply With Quote
Old 5th December 2008, 05:57 AM   #2
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
If you mean frequency response and distortion , yes of course.
You can measure some other things also.
However you will be adviced to use some form of protection at the input of the sound card in case you inadvertently apply high voltage dc or ac to the sound card input. If you do that ,it will result in blue smoke from your sound card and you know "that" cannot be put back !

I know , it happened to me . I was very careful , but a slipped probe for a fraction of a second was enough. So a buffer or protection circuit ( dc blocker cap , voltage divider with zener clamping ) is probably mandatory for absolute safety.
__________________
AM
  Reply With Quote
Old 5th December 2008, 01:58 PM   #3
diyAudio Member
 
Join Date: Nov 2008
More specifically.

Which are the better (more accurate) soundcards?.

What type of connection do I use?.

My Atma-Sphere pre-amp uses balanced output, do I need to make up a special cable?.
  Reply With Quote
Old 5th December 2008, 02:52 PM   #4
Pan is offline Pan  Sweden
diyAudio Member
 
Join Date: Sep 2002
Best depends on several things..

USB?
Firewire?
PCI?


If you are going to use it for measurements obviosuly the things you are going to measure determines the performance of teh audiointerface. You need the noise and distortion of the interface to be lower by a good margin.

For PCI cards Echo Audio's Mia is good value and Lynx2 the best.
There are other alternative as well.

For USB I strongly recommend E-MU 0202USB or 0404USB.

For Firewire, Echo Audio Audiofire2/4 is very good.

edit: sorry, I didn't read carefully enough. I see that you want to measure speakers which means that you would need a mic preamp, then E-MU 0404USB and Audiofire4 is my advice.

Audifire4 is extremly good and can easily replace a CDP in a top notch stereo rig.


/Peter
  Reply With Quote
Old 5th December 2008, 03:20 PM   #5
Svein_B is offline Svein_B  Norway
diyAudio Member
 
Join Date: Oct 2005
"Best soundcard" is probably not required. Start by using what you have.
I have successfully used several different notebooks with satsifactory performance.

A simple loopback test with a 3,5mm plug in both ends will show the basic performance of your soundcard, in particular noise-floor and LF / HF roll-off.

For basic amp measuremnet, using ATRA or some of the other alternatives, you need a level adaptation from the amp output to your soundcard input. For measuring power amps a 1/10 voltage divider is suitable for connection to soundcard line input. For connection to mic input something like 1/500 is preferred. Se illustration below.

Measuring a preamp with balanced output should ideally use a soundcard with balanced input.

SveinB.
Attached Images
File Type: gif measure-probe.gif (5.9 KB, 169 views)
  Reply With Quote
Old 6th December 2008, 01:35 PM   #6
diyAudio Member
 
Join Date: Nov 2008
Thank you Svein_B

Digigram has both an interface cable UAX220-MIC (Balanced I/O), and a Balanced sound card with phantom powered microphone pre-amplifier VX222HR-MIC.

Anyone have any comments?.
  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
S-5 Electronics K-12M (11MS8) 8 wpc PP Tube Amp Kit ($139) gmilitano Tubes / Valves 92 18th June 2014 11:33 PM
Sub amp/speaker to compliment S5 electronics K 12 G tube amp xxguitarist Tubes / Valves 0 22nd April 2009 02:57 AM
S-5 Electronics Tube Amp Kit dru85 Tubes / Valves 5 10th June 2006 04:16 PM
S5 Electronics 139 $ tube amp Gubby Tubes / Valves 4 19th November 2004 04:28 PM


New To Site? Need Help?

All times are GMT. The time now is 09:26 AM.


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