Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Equipment & Tools From test equipment to hand tools

Lepai 2020 as measurement amp?
Lepai 2020 as measurement amp?
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 19th March 2012, 04:33 PM   #1
tuxedocivic is offline tuxedocivic  Canada
diyAudio Member
 
tuxedocivic's Avatar
 
Join Date: Jan 2011
Location: Ladysmith, BC
Default Lepai 2020 as measurement amp?

Does anyone know the response of this popular little Lepai? I'm considering using it for speaker measurement because it's:

Small;
Light;
mini jack input; and
Volume control;

But it's so cheap and all, I'm not sure it's suitable. Has to be linear. I wouldn't be using it for measurements much past 2.83V. Anything above that I'll drag out something tougher.

Thanks for any help.
  Reply With Quote
Old 19th March 2012, 07:48 PM   #2
s3tup is offline s3tup
diyAudio Member
 
s3tup's Avatar
 
Join Date: Dec 2004
Location: Israel
You can't connect anything beside speakers to it's output, because they are in BTL mode (no ground, differential). So this rolls-out impedance measurements, leaving just a FR/THD plots.

You'd better check "big opamp"-style circuits, such as the chipamp concept.
  Reply With Quote
Old 19th March 2012, 08:22 PM   #3
tuxedocivic is offline tuxedocivic  Canada
diyAudio Member
 
tuxedocivic's Avatar
 
Join Date: Jan 2011
Location: Ladysmith, BC
Yup. I only want to be able to hook up speakers outside with this. That's why I want something small and portable. I just need to know if it's reliably flat? I don't have a clue about amplifiers
  Reply With Quote
Old 19th March 2012, 08:52 PM   #4
Kjeldsen is offline Kjeldsen  Denmark
diyAudio Member
 
Join Date: Dec 2003
Location: Randers, Denmark
The chips it self have linear response from 30 Hz to 5000 Hz. 10 Hz is 0,5 dB down and 20.000 Hz also 0,5 dB down. I don't know if that is also the case with the Lepai, but they should be able to have similar characteristic's. You could also consider ready made pcb's. They are around 7-10$ incl. freight. I have seen Tripath TA2024, Yamaha YDA148 and others
  Reply With Quote
Old 19th March 2012, 09:14 PM   #5
tuxedocivic is offline tuxedocivic  Canada
diyAudio Member
 
tuxedocivic's Avatar
 
Join Date: Jan 2011
Location: Ladysmith, BC
Thanks for this info. I might give it a try then. Better would be nice. But this would sure be convenient.

I'd try a ready made PCB, but honestly have no clue what I'm doing with amps. I was unsure buying a power supply for my Lepai let alone assembling a kit
  Reply With Quote

Reply


Lepai 2020 as measurement amp?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which TA2020 amp? Topping TP20, Amp-03, or Lepai LP-2020 nkx1 Chip Amps 36 31st December 2013 12:43 PM
Mini ~$150 Ultimate Boom Box Lepai 2020 ++ ?? ph123 Construction Tips 17 20th December 2012 09:31 PM
SureTA-2024 Board integrated in Lepai LP-2020 - Quad Channel amp QT0815 Class D 3 13th February 2012 11:11 PM
Lepai LP-2020 mod to include sub out rziebro Class D 1 12th February 2011 04:01 PM


New To Site? Need Help?

All times are GMT. The time now is 12:28 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki