Hi,
I am looking for stand alone module amp which can receive on input signal from another DAC. Do you have positive experience wih JustBoom amp?
Is there better solution (amp only module without DAC)?
What power source do you use for JustBoom amp? Do I need linear PS or switching is ok?
I am looking for stand alone module amp which can receive on input signal from another DAC. Do you have positive experience wih JustBoom amp?
Is there better solution (amp only module without DAC)?
What power source do you use for JustBoom amp? Do I need linear PS or switching is ok?
What is your music source and DAC?
Do you already have the Justboom amp, or are you coinsidering it? For £60, there are other, 'better' options.
Do you already have the Justboom amp, or are you coinsidering it? For £60, there are other, 'better' options.
What would you recommend instead of Justboom amp. Also do you know if the JustBoom Amp is compatible with RPi Zero or do I have to use some higher RPi series (3/4)?
I want to use RPi with ProtoDac as music source.
I want to use RPi with ProtoDac as music source.
The Justboom amp is designed to either act as a standalaone amp, receiving either balanced or unbalanced input from a DAC, for example. It can be used with an RPi Zero, but Justboom expect you to use one of their DACs, to simplify the audio and power connections.
Given your budget (ie the same £60 you'd spend on the Justboom amp), I'd be looking at a TPA325* series amp from Ti, or a TDA7498, or a MA12070 based device. I assume you're from the UK, so here is a selection from ebay:
MA12070
Another MA12070
TPA3251
TPA3251 Bare Board
TDA7498
Many of the above can be found cheaper on ALiExpress, etc.
Given your budget (ie the same £60 you'd spend on the Justboom amp), I'd be looking at a TPA325* series amp from Ti, or a TDA7498, or a MA12070 based device. I assume you're from the UK, so here is a selection from ebay:
MA12070
Another MA12070
TPA3251
TPA3251 Bare Board
TDA7498
Many of the above can be found cheaper on ALiExpress, etc.
Thank you for the recommendation.
So do you think the boards you proposed are better than JustBoom amp. I don't necessarily need higher amp power. Is there somebody who can compare which amp sounds best?
So do you think the boards you proposed are better than JustBoom amp. I don't necessarily need higher amp power. Is there somebody who can compare which amp sounds best?
I do think each of the boards I suggested have the potential to be better than the Justboom Amp. The Justboom is built around a TPA3118 class D chip, but the board is constrained to being RPi HAT size. All of the boards I suggested are built with later 'generation' chips than the TPA3118.
If you're not looking for masses of power, then perhaps consider a TPA3221 based device:
TPA3221
Another TPA3221
Are you looking for a ready assembled and ready to go amp, or are you happy to buy a board, add a box and a volume control? What speakers are you planning to use? What is your music source; are you streaming form Spotify or similar, or do you have a disc based music server?
At the end of the day, only you can decide whether an amp works for you, your system, your music and your room. Luckily, with Class D amps being relatively cheap. experimentimg can be cheap, and enjoyable...
If you're not looking for masses of power, then perhaps consider a TPA3221 based device:
TPA3221
Another TPA3221
Are you looking for a ready assembled and ready to go amp, or are you happy to buy a board, add a box and a volume control? What speakers are you planning to use? What is your music source; are you streaming form Spotify or similar, or do you have a disc based music server?
At the end of the day, only you can decide whether an amp works for you, your system, your music and your room. Luckily, with Class D amps being relatively cheap. experimentimg can be cheap, and enjoyable...
It is all under construction 😀 but I will have disk as source (streamer maybe in the future).
I wanted the JustBoom amp as temporary and test purpose solution. Also I liked the description and doc for the board. I would say I am rather beginner. Do you think for example TPA3221 will have this kind of support? Maybe the JustBoom will be beter in this aspect? But I would like to buy board, not complete package.
I wanted the JustBoom amp as temporary and test purpose solution. Also I liked the description and doc for the board. I would say I am rather beginner. Do you think for example TPA3221 will have this kind of support? Maybe the JustBoom will be beter in this aspect? But I would like to buy board, not complete package.
Justboom is an offshoot company set up by Pi-supply in 2017. Their boards have not been updated since then. Class D technology has moved on and the £60 you'd spend on the Justboom amp will get you more elsewhere. Having said that, it would make a good starting point, as it is a mature design, based on the Ti reference board, and is well documented.
None of the boards I've seen and use have selector switches for different speaker impedances. The output filters(capacitor and inductors) are a bit of a compromise to cover the range. You can change the inductor or capacity values for a better match to your speakers, but I'd suggest your're not there yet? You can read the TPA3221 datasheet and see what they recommend and what they use in their reference design. Most Chinese TPA boards are based on reference designs.
None of the boards I've seen and use have selector switches for different speaker impedances. The output filters(capacitor and inductors) are a bit of a compromise to cover the range. You can change the inductor or capacity values for a better match to your speakers, but I'd suggest your're not there yet? You can read the TPA3221 datasheet and see what they recommend and what they use in their reference design. Most Chinese TPA boards are based on reference designs.