They just play mono and you can use either of the outputs. I suppose for safety, one should add a 200ohm 5W dummy resistor on the unused side. This is also useful for a two way speaker where you biamp the woofer and its crossover separately from the tweeter's crossover.
@Phase: you were able to get this board to operate in TWS mode?
@Phase: you were able to get this board to operate in TWS mode?
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a) Are these TWS boards, they dont mention TWS anywhere?
b) As I understand, in TWS setup the source BT side transmits a stereo channel (typically a mobile phone) and on the receive side there are 2 TWS modules each acting as separate L and R respectively. Thus one can just buy 2 of the modules and make a BT stereo speaker system with it. Is my understanding correct?
From what I've read when in TWS mode one chip acts as the master and one as a slave. The master receives both L and R and transmits one channel to the slave. To overcome latency the master and slave send packets back and forth to determine the round trip latency. The master then sends one channel to the slave, delays 1/2 the round trip latency and then processes the other channel.
I just tried to repeat the dual-connection once again, and while two units will connect at the same time, only the last one paired will play.
Will have to wait a bit for a TWS solution from Jieli, it seems that after some reading that they do have such solutions, were just released earlier this year.
Sorry about the false hopes…
Will have to wait a bit for a TWS solution from Jieli, it seems that after some reading that they do have such solutions, were just released earlier this year.
Sorry about the false hopes…
I verified that it puts out the same mono from right or left channel of the same board. I suppose the output could be paralleled to allow driving 2ohm loads (pseudo PBTL?). Not sure if the amp will like that though without changing some other switching parameters. I am only using one channel. On second thought I should have put a dummy resistor on unused channel as Class D amps can blow out from back EMF on inductor when there is no load attached.
There is no DSP on this amp that I am aware of as TPA3116/3118 do not have built in DSP.
It sounds pretty good though. I did have occasional loss of BT connection - the music just stops playing but the phone thinks it is still connected and playing. You just have to do a re-connect and it works again. So that is mildy annoying but happens more if you are doing something else on your phone like surfing the web while it is playing.
There is no DSP on this amp that I am aware of as TPA3116/3118 do not have built in DSP.
It sounds pretty good though. I did have occasional loss of BT connection - the music just stops playing but the phone thinks it is still connected and playing. You just have to do a re-connect and it works again. So that is mildy annoying but happens more if you are doing something else on your phone like surfing the web while it is playing.
Hi X,
The DSP is in the bluetooth chip. You have to buy their special pogo pin attachment and a pair of very steady hands (a lot of complaints here).
How to Change the Bluetooth Audio Amplifier EQ Settings
Oon
The DSP is in the bluetooth chip. You have to buy their special pogo pin attachment and a pair of very steady hands (a lot of complaints here).
How to Change the Bluetooth Audio Amplifier EQ Settings
Oon
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The best way is to use TWS earbuds for this: Transforming dead earbuds into POWERFUL wireless speakers - YouTube
Any TWS earbuds can be used.
Any TWS earbuds can be used.
Okay so there's a problem with that. Now granted I didn't watch the entire video but any half decent earbud is going to use the inbuilt Bluetooth SoC to perform DSP on the audio stream to correct for the frequency response irregularities in the earbud drivers.
Hookup some speakers to the output of the earbud system and it's entirely possible that things will sound terrible as the DSP is doing the wrong thing.
So while this could work decently there's also a big chance that it could sound terrible.
Hookup some speakers to the output of the earbud system and it's entirely possible that things will sound terrible as the DSP is doing the wrong thing.
So while this could work decently there's also a big chance that it could sound terrible.
I think many lower cost earbuds won’t have DSP. The video is more about how to build a speaker with crossover, amp, passive radiator etc. there was a funny comment: “I took a BT earbud and turned it into a house, all I needed was $400k worth of materials and labor”
One thing the guy overlooked is ability to push the button on the earbud to reset the BT pairing. It’s not simply done by power cycling. This is true on many earbuds.
One thing the guy overlooked is ability to push the button on the earbud to reset the BT pairing. It’s not simply done by power cycling. This is true on many earbuds.
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My HP laptop with Win 10 works with TWS earbuds. I’m in a 6hr videocon with mine (open ear bone conduction) “AirShokz” .
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I just got the AIYIMA TWS amp boards. They look well made but components are smaller and leas expensive than the Tinysine boards. They are mono which is nice. And supposedly to pair TWS you press the button on either board but it becomes the right channel.
Attachments
It looks like this is becoming a popular idea
https://www.thehomehacksdiy.com/how-to-connect-multiple-bluetooth-speakers-to-one-device/
https://www.thehomehacksdiy.com/how-to-connect-multiple-bluetooth-speakers-to-one-device/