Thread Tools
This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Feb 09, 2020, 12:02 AM
Registered User
Jack Crossfire's Avatar
Thread OP
Discussion

Making a bluetooth speaker louder


It didn't take long for the lion kingdom to realize it was running hundreds of miles in silence. The Anker was no louder than a phone speaker. There are 2 ways to make a bluetooth speaker louder. They all currently have a separate radio & amplifier. The HT8692 amplifier in the Anker has a gain adjustment resistor, but it has a very low maximum gain. Anything below 65k made no difference.
The next step was putting an op-amp between the ATS2815 radio & amplifier. All it took was a bare LF353 with a gain pot. The Anker provides a virtual ground & dividing resistors to combine the 2 channels.

The maximum gain of this circuit was limited by the input offset voltage of the op-amp. Above the maximum gain, the DC offset of the output mutes the signal. The lion kingdom tuned it just below the maximum gain & relied on the phone volume to limit distortion. It's amazing how much power these speakers have put out, over the last 5 years, without blowing up.
Sign up now
to remove ads between posts


Quick Reply
Message:
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Need to make MW buzzer louder? Add a FET [diagram / how-to] Cereal_Killer Multirotor Drone Electronics 0 Apr 04, 2015 10:43 AM
Discussion how to make an EDF jet louder? RC_Bob Electric Ducted Fan Jet Talk 13 Oct 29, 2010 09:08 AM
Discussion Making a plane locater "beeper" louder? richg99 DIY Electronics 19 Aug 23, 2009 10:34 AM