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New Aiyima AO4 coming in May
- Thread starter Graham849
- Start date
Vini darko
Major Contributor
Important support for gallbladder 
OP
- Thread Starter
- #4
Totally over my head... LIT.Important support for gallbladder
BTW hi, I am originally from Yeovil. Waves from Australia.
It’s on the spec sheet posted #2 post above. Actually says it has “Support for Gallbladder level”.
I was just thinking yesterday about how discontinuation of the original A04 left a bit of a hole in their lineup. Don't really need tone controls for my main use of these amps - though I do like my SMSL AO100 digital control for volume and tone on occasion. I'm currently using the old A04 in my sunporch system as it gives me more volume options for softer volume levels than the A07.
Per another poster's desire here today, it would be interesting for Aiyima or SMSL to offer a straight power amp with no VC, similar to what Schiit did with their new mini-amps, but with more power. That would be a niche product though, probably not worth their while. But there is a gap for anyone wanting a D "just an amp" until you get to the 2-channel Hypex252 builds.
Per another poster's desire here today, it would be interesting for Aiyima or SMSL to offer a straight power amp with no VC, similar to what Schiit did with their new mini-amps, but with more power. That would be a niche product though, probably not worth their while. But there is a gap for anyone wanting a D "just an amp" until you get to the 2-channel Hypex252 builds.
Lost in translation! I do feel like I do feel like I need more gall bladder support in my audio life to protect from LFO damage.Important support for gallbladder
I do hope the quality control for physical products is better than for literature. They must have used something like google translate and failed to do a back translation check.
what does "output mode: BTL stereo" mean?
its not bridgeable
also power is said to be ~170w 4 ohm at 1% thd
so i would imagine that its say 70-75w at 8 ohm at less than 1%?
also guy here says you can apply for 'early bird' sale
www.audiosciencereview.com
so perhaps under $75 delivered with a psu?
my opinion is these things dont really distinguish themselves between the A07 and Fosi etc. except this one has no BT (good) and it does have bass treble (who cares?) but it seems to have plenty of power off a base psu?
its not bridgeable
also power is said to be ~170w 4 ohm at 1% thd
so i would imagine that its say 70-75w at 8 ohm at less than 1%?
also guy here says you can apply for 'early bird' sale
"Early Bird Special" for upgraded Aiyima A04
Just got an email this morning with an ad for an "early bird" sale (30% off) on an upgraded version of the original Aiyima A04 amplifier: https://www.aiyima.com/pages/early-bird-program?utm_campaign=emailmarketing_160029376788&utm_medium=email&utm_source=shopify_email Since I don't own the...
www.audiosciencereview.com
so perhaps under $75 delivered with a psu?
my opinion is these things dont really distinguish themselves between the A07 and Fosi etc. except this one has no BT (good) and it does have bass treble (who cares?) but it seems to have plenty of power off a base psu?
One large criticism that I see more and more about the A07 is that with the standard power brick, one doesn't have much range in the volume control until it gets pretty loud. That's true for me too, and oddly, not that much different if using a 24v/5a brick. The later previous A04 model had lower gain so it is well suited for low to moderate listening levels. This new A04 though, has MORE power. Perhaps it has a better volume range pot taper (non-linear), like Fosi has begun to use?
pickyAudiophile
Active Member
Still, 6 years after release of these chipsets, there is no mass production end-to-end thoughtfully engineered TPA325x build available from any of these companies. Cheesy capacitors here, flimsy potentiometers there, thermal or current related problems somewhere, pointless tone controls elsewhere, tube mumbo-jumbo in a distance, or just inexplicably bad measuring builds released.
For maybe around USD 300 it should be possible to release a simple, well ventilated, well measuring, pop noise free, safety certified power amp with resistor ladder volume control. Where is e/g Allo? They teased a TPA325x for years but nothing happened.
For maybe around USD 300 it should be possible to release a simple, well ventilated, well measuring, pop noise free, safety certified power amp with resistor ladder volume control. Where is e/g Allo? They teased a TPA325x for years but nothing happened.
This seems a little bit harsh to me. Though the various makers are for sure throwing too many build variations at the market. A ventilated case would be good, looks like Fosi is on that. There are a number of us who would pay more for good caps, internal power board, ventilated case, dual 3255 chips (one per channel) and a better Alps volume pot. Perhaps someone will jump on that. Would be nice to see something like this for around $250 to offer a mid-range solution for those of us for whom 100 wpc into 8 ohm nominal speakers is all that's needed. Right now, closest thing to this I think is the SMSL A300 amp, which I have yet to see get reviewed here.
pickyAudiophile
Active Member
I have that SMSL A300 (Infineon MA5332MS) here with me as well as an early 2018 released, meanwhile discontinued, "FX502J-S" by North Flat Japan based on a TPA3250 chipset, see NFJAPAN FX502J-S in Japanese. The chinese version of the FX502 which also existed received a bad review here on ASR. However that japanese amp sonically outperforms the powerful but unfortunately significantly muddier and unavoidably infra-bass shy D300. There is so much more potential in the TPA325x once well implemented... Yes enough people should be willing to pay more, I think that's the case.
TBF to fosi aiyima etc. what is deliverable for $75 shipped to you?
you aint gonna get an heirloom piece of equipment
at best you're going to get a device that meets spec but has "not the best" components inside, because you only paid $75!!!
something i keep thinking of and Amir keeps pointing out is that we're in an age where the Chinese can design manufacture and design a reasonably good stereo amp and warrant it and it should work for many years and years
literally no one else can do this. if you separate the BOM + labor then you cannot come to $75 shipped in another other economy. We are paid something like $20 min wage here so its not wrong.
to me something like an A04 as delivered if it does a true 70w x 2 at 8 ohm at less than 1% thd is all one can expect for under $100... and deep down I think this is an unreasonable expectation, its just the chinese have 'spoiled' us for too long
how can people expect more? it costs more than that to fill my SUV full of gasoline!
you aint gonna get an heirloom piece of equipment
at best you're going to get a device that meets spec but has "not the best" components inside, because you only paid $75!!!
something i keep thinking of and Amir keeps pointing out is that we're in an age where the Chinese can design manufacture and design a reasonably good stereo amp and warrant it and it should work for many years and years
literally no one else can do this. if you separate the BOM + labor then you cannot come to $75 shipped in another other economy. We are paid something like $20 min wage here so its not wrong.
to me something like an A04 as delivered if it does a true 70w x 2 at 8 ohm at less than 1% thd is all one can expect for under $100... and deep down I think this is an unreasonable expectation, its just the chinese have 'spoiled' us for too long
how can people expect more? it costs more than that to fill my SUV full of gasoline!
This is true. NAD made a class D desktop amp which no doubt has thoughtful design, high quality components throughout, available though retailers with warranty etc. and it costs a lot more!
NAD D 3045 Hybrid Digital Amplifier
NAD D 3045 Hybrid Digital Amplifier is everything a modern amplifier should be; compact, energy efficient, powerful, silent.
Not sure if it got reviewed here. I know if it was wildly popular there would be a lot more like it but the price is too high to sell that many. My guess is it's more of a slow steady trickle of sales than a torrent.
well funny you should mention NAD as they were one of the pioneers with the infamous NAD 3020... but even that device was something like $250 usd adjusted in the day... BUT again this comes down to what you can deliver as far as a 19" wide full sized component costs and with phono tape loops and all that
from what i have seen there hasnt been a western designed stereo amp, even Chinese made, that comes close to what the Chinese make themselves
sure there are limitations in that its really just a power amp w/ volume control but this is a mirror of what modern tastes are
we match it with a DAC preamp w/ bluetooth and it does what 90% of us (and the chinese audience) are after
from what i have seen there hasnt been a western designed stereo amp, even Chinese made, that comes close to what the Chinese make themselves
sure there are limitations in that its really just a power amp w/ volume control but this is a mirror of what modern tastes are
we match it with a DAC preamp w/ bluetooth and it does what 90% of us (and the chinese audience) are after
based on this, we are trying to make a pure tpa32xx amplifier with build-in SMPS this year. Hope everything will going well for diyer selection.
TPA3255, TPA3251 with Post Filter Feedback(PFFB)
Dear diy folks some of member may knew,years ago we put tpa3255/51 design into one high-integrated design and many people used them in their build, with some user are expecting higher-end design with higher performance, especially ti release a design note to achieve higher performance by adding...
i think the reason you dont see $300 tpa units is because the market has moved onto infineon and maybe even ncore units arent too far away
there must be a reason why these main players dont even bother with a $200 tpa unit... perhaps even with a built in switch mode psu
there must be a reason why these main players dont even bother with a $200 tpa unit... perhaps even with a built in switch mode psu
I have two Aiyima a04 , the older model, and I can recommend a capacitance multiplier made by Allo on the power input.
The input voltage has to be below 30 V, but the sound gets slightly better than using a meanwell 28 V directly into the Aiyima a04. You have to switch the output connector so it fits the input of a04.
www.audiophonics.fr
allo.com
The input voltage has to be below 30 V, but the sound gets slightly better than using a meanwell 28 V directly into the Aiyima a04. You have to switch the output connector so it fits the input of a04.
ALLO Capacitance Multiplier Noise Reducer for Allo Volt or Class D Amp - Audiophonics
Le Capacitance Multiplier permet la simulation d'un effet de capacité plus grande sur un étage d'alimentation continu. Le principal intérêt est d'abaisser le bruit d'alimentation (le ripple) à des niveaux de qualité HiFi.
Capacitance Multiplier
If you have a noisy PSU, this circuit will clean any ripple/noise down to 500uV. Works from 9-35V.
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Hey, Tangband, do you happen to know how the gain of the old model A04 (circa 2021) compares to the A07? I'm just curious, I have not seen that spec anywhere.I have two Aiyima a04 , the older model, and I can recommend a capacitance multiplier made by Allo on the power input.
The input voltage has to be below 30 V, but the sound gets slightly better than using a meanwell 28 V directly into the Aiyima a04. You have to switch the output connector so it fits the input of a04.
ALLO Capacitance Multiplier Noise Reducer for Allo Volt or Class D Amp - Audiophonics
Le Capacitance Multiplier permet la simulation d'un effet de capacité plus grande sur un étage d'alimentation continu. Le principal intérêt est d'abaisser le bruit d'alimentation (le ripple) à des niveaux de qualité HiFi.
Capacitance Multiplier
If you have a noisy PSU, this circuit will clean any ripple/noise down to 500uV. Works from 9-35V.
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