|
Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
Class D Switching Power Amplifiers and Power D/A conversion |
![]() |
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 |
![]() |
|
Thread Tools | Search this Thread |
![]() |
#1521 | |
diyAudio Member
Join Date: Apr 2019
|
Quote:
As I listened to music, I noticed that the right side was 1dBv louder than the left. So, I compensated by decreasing the right volume of my onboard soundcard by 1dBv. However, the channel imbalance may not be consistent across all frequencies. Is it common for a cheap generic class-d amp to have 1dBv of channel imbalance? Last edited by CowCat; 16th November 2019 at 10:47 AM. |
|
![]() |
![]() |
#1522 | |
diyAudio Member
Join Date: Jun 2007
Location: South Carolina
|
Quote:
With the TI amps connected in differential (balanced) mode with a source with volume control and balanced outputs, you will really be blown away with how transparent these amps can be. I connected a Pono Player with the ESS DACs and Ayre-designed analog output section to the TI amp, and it was shockingly awesome. For other sources, I suggest a very good preamp. The Pass DIY B1 with Korg NuTube Triode preamp offers additional gain along with that holographic triode sound signature. Paired with the TI TPA3255EVM amp, it makes a ridiculously budget-friendly high end amplification system that will compete with many high end audio systems.
__________________
Rich |
|
![]() |
![]() |
#1523 | |
diyAudio Member
Join Date: Dec 2017
Location: The mountains, calm and quiet.
|
Quote:
I wouldn't worry about 1dBv gain difference. If you look at the TPA3116 datasheet (section 6.5), the gain accuracy is stated to be within 1dB from "typical", thus within a 2dB margin. So, 1dB is well within. |
|
![]() |
![]() |
#1524 | |
diyAudio Member
Join Date: Apr 2019
|
Quote:
Is it common for TPA3251 and TPA3255 to have 1~2dB of channel imbalance in input gain? Last edited by CowCat; 16th November 2019 at 12:15 PM. |
|
![]() |
![]() |
#1525 |
diyAudio Member
Join Date: Dec 2017
Location: The mountains, calm and quiet.
|
For TPA3251 and TPA3255 I no found gain tolerances such as for TPA3116. For TPA3251 and TPA3255 only the typical gain is listed.
|
![]() |
![]() |
#1526 |
diyAudio Member
Join Date: Jan 2008
Location: Carp
|
Most of these boards have op amps in front of the amplifier power amp chip. It is very possible that these op amps or the resistors around the op amps are causing the channel imbalance.
|
![]() |
![]() |
#1527 | |
Got Foam?
diyAudio Member
|
Quote:
LS50 sound like a great combo. Have you tried it in SE output mode (cap coupled)?
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio |
|
![]() |
![]() |
#1528 |
diyAudio Member
Join Date: Nov 2011
|
|
![]() |
![]() |
#1529 |
diyAudio Member
Join Date: Apr 2019
|
The channel imbalance was actually caused by water trapped in my left ear. Water makes higher frequencies quieter. My left ear tends to trap water after a shower. After removing water from my left ear, I confirmed that there is no apparent channel imbalance in my generic TPA3255 amplifier.
|
![]() |
![]() |
#1530 | |
diyAudio Member
Join Date: Mar 2016
Location: Normandie, France
|
Quote:
![]() |
|
![]() |
![]() |
Thread Tools | Search this Thread |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Inexpensive HDMI 2 channel receiver design discussion | brw02005 | Construction Tips | 1 | 6th March 2016 08:27 PM |
A Discussion on Design Philosophy - OB vs Multiway vs NOB | miragem3i | Multi-Way | 2 | 10th July 2014 04:02 AM |
Discussion: push pull design and minimal distortion does it matter ? | hoppaz | Subwoofers | 19 | 15th November 2012 09:34 PM |
Car subwoofer (2x8" fancy design discussion) | VEC7OR | Subwoofers | 11 | 29th May 2004 10:12 PM |
New To Site? | Need Help? |