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

Class D Switching Power Amplifiers and Power D/A conversion

TDA7492p low volume
TDA7492p low volume
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 22nd February 2018, 09:24 AM   #1
Andreasdeleuran is offline Andreasdeleuran
diyAudio Member
 
Join Date: Feb 2018
Default TDA7492p low volume

Hi guys.

Please be warned - i'm new

I have a simple question. I bought a TDA7492p - no buttons and no aux.

It works perfectly fine in a small PA speaker. It does however play on different volume levels depending on the connected device.

My tests
On the following phones it plays perfectly loud:
- Iphone 8 and oneplus one
And the ones where the volume is waaaaay lower:
- Huawei mate 10 lite and Samsung s6 edge

Any explaination/solution.

Every answer is greatly appreciated!
  Reply With Quote
Old 22nd February 2018, 11:00 AM   #2
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Hi Andreas,

I assume you use the headphone output from the phones?

The most likely reason for the difference in sound-level is that the signal outputs from the phones are different in level.

Take one loud phone and one low phone and test that they have a significant difference in sound level when used with your TDA7492.
Let your phones continue playing music and don' t touch the volume buttons on the phones.

Then, without switching your phones off or stopping the music, try if there is a corresponding difference when you use a headphone (the same) directly on the two phones.

If they play equally loud in the same headphones, it may be a difference in output impedance that causes the sound level differences.

Last edited by FauxFrench; 22nd February 2018 at 11:07 AM.
  Reply With Quote
Old 22nd February 2018, 11:08 AM   #3
Andreasdeleuran is offline Andreasdeleuran
diyAudio Member
 
Join Date: Feb 2018
Thanks for the answer. As i said - there's no AUX input on the amp and it's purely used via Bluetooth.
  Reply With Quote
Old 22nd February 2018, 09:38 PM   #4
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Andreas, your presentation of the problem: "...a TDA7492p - no buttons and no aux." did not mention Bluetooth. "TDA7492P" is an amplifier chip not including any Bluetooth.

Now I believe to understand your problem better. My trivial conclusion is that it is not an amplifier problem because with some phones the amplifier just works very well.

The problem is in the Bluetooth streaming between your phone and the Bluetooth chip.
This is an amplifier (class D) thread and there may be other threads that are more relevant for such a problem. But, you can also take your chances here if you prefer.

A trivial question: For the two phones that play way too low, is it so that you cannot increase the level with the phone volume buttons?
  Reply With Quote

Reply


TDA7492p low volumeHide 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
TDA7492P 3.5mm issue novice121 Class D 0 3rd September 2017 11:00 PM
Which version of TDA7492P should I use? Zerlen Class D 3 6th July 2017 04:56 PM
Powering TDA7492P luisxd Class D 3 16th April 2016 01:33 AM
Add aux input to TDA7492P luisxd Class D 5 15th April 2016 09:35 PM
TDA7492P 50W/50W Ebay - AUX Input Volume Lower Than Bluetooth Volume? iammrhappy123 Chip Amps 4 9th November 2015 10:40 PM


New To Site? Need Help?

All times are GMT. The time now is 12:02 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki