rvsixer
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Hopefully, the A7 will be the Fosi V3 Mono I have been waiting for
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3e Audio A5 Stereo Amplifier Review
- Thread starter amirm
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Guddu
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Just FYI..... This A7 is stereo version with 2 x TPA3255 inside.Hopefully, the A7 will be the Fosi V3 Mono I have been waiting for
rvsixer
Addicted to Fun and Learning
Exactly. I've been waiting for a performant 2xmono or 1x2channel 200W+ cheap 3255 class D amp (that fixes the Fosi thermal/QC issues).
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ICIETDIYEUR
Senior Member
Hi.
Sorry but at the prices offered by 3eAudio for their models of integrated amplifiers like here, I much prefer to buy a PCB from them and integrate it myself into a DIY project that will get better performance with a better power supply...
@ somebodyelse: I think you're making a mistake by saying that none of the integrated amplifiers like here by 3eAudio don't have PFFB: I claim the opposite, they all have it (except the mono model perhaps, although the PBTL models, i.e. with two TPA chips might not have it as well since they also work in PBTL 'mode').
Look at the tracks I designated as 'hidden' in the photos in my post above. I am also convinced that such 'SINAD scores' could not be obtained by a non-PFFB Class D amplifier.
But it's up to 3eAudio to confirm it.
@ 3eAudio: it seems that you use the same PCB for each model of your amplifiers but 'equipped' differently depending on the version as you did with your PCBs, is this really the case ?
If so, then it's a rich idea on your part because it saves you different 'stocks' and development/manufacturing costs
Did you 'take' this inspiration from MARANTZ/PHILIPS from the time of CD players ?
@ rvsixer: I think that O-NOORUS should be able to meet your expectations quite soon with a model under development that requires a precise study at different 'levels' to offer 200Wrms real per channel... be continued
Sorry but at the prices offered by 3eAudio for their models of integrated amplifiers like here, I much prefer to buy a PCB from them and integrate it myself into a DIY project that will get better performance with a better power supply...
@ somebodyelse: I think you're making a mistake by saying that none of the integrated amplifiers like here by 3eAudio don't have PFFB: I claim the opposite, they all have it (except the mono model perhaps, although the PBTL models, i.e. with two TPA chips might not have it as well since they also work in PBTL 'mode').
Look at the tracks I designated as 'hidden' in the photos in my post above. I am also convinced that such 'SINAD scores' could not be obtained by a non-PFFB Class D amplifier.
But it's up to 3eAudio to confirm it.
@ 3eAudio: it seems that you use the same PCB for each model of your amplifiers but 'equipped' differently depending on the version as you did with your PCBs, is this really the case ?
If so, then it's a rich idea on your part because it saves you different 'stocks' and development/manufacturing costs
Did you 'take' this inspiration from MARANTZ/PHILIPS from the time of CD players ?
@ rvsixer: I think that O-NOORUS should be able to meet your expectations quite soon with a model under development that requires a precise study at different 'levels' to offer 200Wrms real per channel... be continued
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What evidence do you have that the Fosi V3 Mono is not capable of long term usage?
youre sure that PBTL mode is always no PFFB?Hi.
Sorry but at the prices offered by 3eAudio for their models of integrated amplifiers like here, I much prefer to buy a PCB from them and integrate it myself into a DIY project that will get better performance with a better power supply...
@ somebodyelse: I think you're making a mistake by saying that none of the integrated amplifiers like here by 3eAudio don't have PFFB: I claim the opposite, they all have it (except the mono model perhaps, although the PBTL models, i.e. with two TPA chips might not have it as well since they also work in PBTL 'mode').
Look at the tracks I designated as 'hidden' in the photos in my post above. I am also convinced that such 'SINAD scores' could not be obtained by a non-PFFB Class D amplifier.
But it's up to 3eAudio to confirm it.
@ 3eAudio: it seems that you use the same PCB for each model of your amplifiers but 'equipped' differently depending on the version as you did with your PCBs, is this really the case ?
If so, then it's a rich idea on your part because it saves you different 'stocks' and development/manufacturing costs
Did you 'take' this inspiration from MARANTZ/PHILIPS from the time of CD players ?
@ rvsixer: I think that O-NOORUS should be able to meet your expectations quite soon with a model under development that requires a precise study at different 'levels' to offer 200Wrms real per channel... be continued
I am very curious for the 3e A7 Data. And for the Power vs Distortion Graph, a Power on&off noise would also bei nice.
Nice to see the reactive Load Test with 2ohm Here
For me the Fosi Za3 is still best value for Money when discounted for 99 Euro. The A5 and A7 seems to be a cheaper Topping PA5 or PA7, nice to see.
Nice to see the reactive Load Test with 2ohm Here
For me the Fosi Za3 is still best value for Money when discounted for 99 Euro. The A5 and A7 seems to be a cheaper Topping PA5 or PA7, nice to see.
This is amazing performance for the size and price. Love it! I think I will get one for day to day use and as I am downsizing. Simply don't need any more for speakers with decent 85dB+ efficiency. I can hide this thing or mount it behind a faux wall or something and connect it to a WiiM Pro+.
ICIETDIYEUR
Senior Member
@ cobby:
In general we have been used to stereo amplifiers (so in 'BTL mode') with PFFB.
I don't think I've ever encountered a TPA32xx chip in 'PBTL mode' using the PFFB.
I think that this can lead to certain 'problems' of operation in the more or less long term...
My DIY amplifier with two TPA3255 is not PFFB and especially to provide 200W real rms under 8 Ohms it needs a 1200W power supply (52V - 23A !!!).
In general we have been used to stereo amplifiers (so in 'BTL mode') with PFFB.
I don't think I've ever encountered a TPA32xx chip in 'PBTL mode' using the PFFB.
I think that this can lead to certain 'problems' of operation in the more or less long term...
My DIY amplifier with two TPA3255 is not PFFB and especially to provide 200W real rms under 8 Ohms it needs a 1200W power supply (52V - 23A !!!
).
daniboun
Major Contributor
I don't think there is a revolution to expect with the A7 since the Topping PA7 which was tested in April 2023 uses the same architecture as the A7 or should I rather say that the A7 is a copy of the PA7 in PBTL ( 2X TPA3255 chips)
Topping PA7 Plus Amplifier Review
This is a review and detailed measurements of the Topping PA7 Plus stereo class D amplifier. It was sent to me by the company and costs US $549. The PA7 Plus is stylish with firm switches that have nice action. You can select power on/off or trigger input. In addition, you have a choice of...
www.audiosciencereview.com
The PA7 on the other hand uses a 52V/6.5A PSU, we can imagine by extrapolating that the A7 should be a little less powerful during ASR measurements (VS PA7)
@amirm > Please don't forget the 45KHZ Bandwidth test for the next A7 please )
Not related. Example:
3e Audio TPA3255 Amplifier Kit 480-1-29A Review
This is a review and detailed measurements of the 3e Audio 480-1-29A, TPA3255 based class D amplifier module. It was sent to me by the company in a reference design for ease of testing: The module is the PCB to the right and costs US 89.99 from company Aliexpress store. This is the mono...
www.audiosciencereview.com
ICIETDIYEUR
Senior Member
Danidoun is completely right !
I remember that when the TOPPING PA5 was released, 3eudio had anticipated to 'copy' the optimized PFFB circuit of TOPPING and that SYLPH AUDIO was also inspired by it, although both of them carried out different but also many calculations and tests.
TOPPING are the pioneers in 'this area' and have not yet been equalled
Moreover, they have definitively driven the point home with their B100 model by carrying out an engineering that could almost have passed for magic not so long ago
I think that only a forthcoming achievement by Bruno Putzeys could make everyone agree
I remember that when the TOPPING PA5 was released, 3eudio had anticipated to 'copy' the optimized PFFB circuit of TOPPING and that SYLPH AUDIO was also inspired by it, although both of them carried out different but also many calculations and tests.
TOPPING are the pioneers in 'this area' and have not yet been equalled
Moreover, they have definitively driven the point home with their B100 model by carrying out an engineering that could almost have passed for magic not so long ago
I think that only a forthcoming achievement by Bruno Putzeys could make everyone agree
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dtaylo1066
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I only wish this stuff were available in 1974 when I was a budding audiophile!
You can run a WiiM Ultra into this amp, grab a pair of $500 speakers and for a kilo-buck be listening to some outstanding hi-fi. Crazy!
You can run a WiiM Ultra into this amp, grab a pair of $500 speakers and for a kilo-buck be listening to some outstanding hi-fi. Crazy!
ICIETDIYEUR
Senior Member
If Mac Intosch goes class D their amps will lose weight !
(but not their price...)
(but not their price...
)
Please. These superlatives aren't helpful. Hypex UcD was fully load independent 20 years ago. Topping didn't even exist then, and they aren't pioneers when it comes to effective feedback loops.TOPPING are the pioneers in 'this area' and have not yet been equalled
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would say the same looking at the datasheets of the TPA3255.Not related. Example:
3e Audio TPA3255 Amplifier Kit 480-1-29A Review
This is a review and detailed measurements of the 3e Audio 480-1-29A, TPA3255 based class D amplifier module. It was sent to me by the company in a reference design for ease of testing: The module is the PCB to the right and costs US 89.99 from company Aliexpress store. This is the mono...
Roland68
Major Contributor
But then it should also be mentioned that the A7 from 3E Audio is significantly cheaper than the PA7/Plus from Topping.I don't think there is a revolution to expect with the A7 since the Topping PA7 which was tested in April 2023 uses the same architecture as the A7 or should I rather say that the A7 is a copy of the PA7 in PBTL ( 2X TPA3255 chips)
Topping PA7 Plus Amplifier Review
This is a review and detailed measurements of the Topping PA7 Plus stereo class D amplifier. It was sent to me by the company and costs US $549. The PA7 Plus is stylish with firm switches that have nice action. You can select power on/off or trigger input. In addition, you have a choice of...
The PA7 on the other hand uses a 52V/6.5A PSU, we can imagine by extrapolating that the A7 should be a little less powerful during ASR measurements (VS PA7)
@amirm > Please don't forget the 45KHZ Bandwidth test for the next A7 please )
In addition, the PA7's current requirement of 6.5A is, in theory, exceeded before the voltage of 52V, so the performance of the A7 with the 48V/10A power supply could actually be higher, but I could be wrong.
Za3 is only best value for money two Za3 on mono sound much much better than the V3 monos with upgrades, what a deception, the ZA3 has to be used on XLR and taking out 3 opamps 2 for the sub and the 1 in the left channelI am very curious for the 3e A7 Data. And for the Power vs Distortion Graph, a Power on&off noise would also bei nice.
Nice to see the reactive Load Test with 2ohm Here
For me the Fosi Za3 is still best value for Money when discounted for 99 Euro. The A5 and A7 seems to be a cheaper Topping PA5 or PA7, nice to see.
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