Is that nice? First time to hear it.
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according to Aiyima the A08 is a more powerful and better measuring unit in every way for less money. @shenzhenaudio
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hi, do you know the amperage and the rating (volts) of the internal power supply?
i do not. i tried to take it apart the day before i sold it because i no longer needed a high quality small amp, and it is very difficult to take apart you need tiny tools to un do the knobs and things however i would say its about average. it did not seem to have an insane amount of power in comparison to the smaller units . it was plenty but i would say 60 to 100 watts max at 4 ohms. maybe 34 volts or something
I have a Aiyima A08. Connect speakers, connect E30 DAC to RCA Inputs, no music playing, turn up the volume and start to hear (faintly) noise at around 9 o’clock, gets louder and nasty at around 1-2 o’clock. Is this normal? Same test on my Audiolab amp and it’s dead silent all the way to max volume.
(fyi, same results when E30 is powered via Laptop USB or Li-Ion Battery Powerbank)
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What kind of packaging did the amp come in ? Got mine from amazon.
if both amps act the same its probably the source (DAC) or a bad cable somewhere. could be whtaver USB or source device as well. try different set of RCA otherwise might wanna return DAC.
I bought mine from Amazon.com (Aiyima store)
Like I said, did the exact same test with same cables, E30 Dac and speakers…on my Audiolab and dead silent. I have since heard on another forum, someone with A07 and E30 Dac and his setup is dead silent all the way to max volume.
Silent for me too so far i thought it had hiss but it turned out to be the recording.
Hit Pause or Stop on the music, then crank up the volume with no music playing. Any noise or dead silent to max volume?
oh i thought you meant there was no sound and it was making sound only at high volume. if you mean it makes sound while no music is playing yes these cheap class D amps do not have great gain ratio so it ramps up volume quite quickly. if your source is a PC or other source that isnt optical, it could be ground loop Hum. try using optical cable for DAC to see if the noise goes away. i remember my aiyima a08 starting to hiss around 4pm on the dial with no music this is normal when using USB because of the noise of the PC power supply passing through USB, which is why many people use optical if you dont use above 192k music. also gain could be set to high on DAC and the output voltage on the DAC could be set too high for the amp and it is clipping or distorting from the high input voltage from the DAC. i will say my Ncore amp is dead quiet at full volume even with a aiyima tube pre amp. but that could be because its a laptop source and not a noisy PC.
E30 is powered via USB from a Li-Ion battery pack. Like I was saying, same setup on my Audiolab and it’s dead silent. Others with A07 tested and dead silent. So it seems to be something with A08 or maybe mine is worse? When I do play music, it starts to distort at around 1 o’clock on the dial. If I use my Audiolab in Pre Amp mode and A08 for power the noise starts at 8 o’clock on the dial and ramps up quicker.
I just thought to see Amazon reviews and a couple others experiencing the same. I also read that one guy said he had A07, then tried A08, then went back to A07 since it didn’t have this issue.
interesting . my a08 did not have this issue. could be a power supply issue as well. might wanna try and get it replaced through amazon. mine was quite a good amp. or just go for the other infineon chip amps on amazon with the refund. mine did distort sometimes though so maybe there is a problem, i always equated it to a very high input signal from my tube pre amp and USB ground loop but maybe it wasnt and there is a problem, i got the sabaj version and it was perfect and had remote. seems better built as well. SMSL makes a decent newer one with dual chips might be able to find a deal.
Ya, been checking out the A0200, DA-9, SABAJ with Infineon. From reading around forums, DIY community… they say the TPA3255 amps sound a bit better than those. I definitely like the look of the other ones. But I’ll take SQ first. See what happens with Aiyima, maybe try another A08 or maybe ask for A07 instead?
well see if they offer refund and just go for sabaj or SMSL they are just better made than aiyima products although ive had many aiyima and have been good. the A04 i found did not sound good a bit warm and loose for a class D. the sabaj sounded better to me than the a07 either way i would make sure to get a good power supply if you can. makes a decent difference they need current if you want to listen above average or so on bookshelf speakers. idk i think the move to dual mono infineon will sound better than aiyima a07 but it is cheaper. i just hope the a08 isnt flawed i would check for more reviews on it , mine worked fine and its one of the first reviews on amazon however it did buzz a bit sometimes depending on the incoming voltage from my DAC or PC humm. so might go with smsl or sabaj since they have remotes and tone controls. ask for full refund of amazon credit and they usually do it instantly although these may be different if coming from china.
The one i got is quiet, but its through a appletv topping E30. Ill try high res though my phone to see if theres noise. Also, the volume on the amp its maybe 8 notches from max on the volume pot.
Have both SMSL AD18 and the SA300. The AD18 no problem still rockin but the display on the SA300 cuts out, the backlight stays on but the screen is blank.
Just a heads up not the only one reporting the problem, check reviews on amazon.
Im kinda of lucky though the problem is intermitten. display works again, maybe it gets hot for being on for a long time (over 5 hours)
if it happens sometimes and not others check to make sure that your other amp does the same over time. if so than you know its a problem with your new amp and not just a random issue with your DAC or appletv over time. there are no moving parts so it is stange that it happens sometimes and not others also you say it happens 8 notches from max? that doesnt really seem like a problem considering how powerful the amp is. i would only think you need half volume to get loud and if it never makes the sound at that point its fine. could just have too much gain up top. just play with it.
No, my A08 is playing clean so far with the volume at the amp on basically max gain. After over a month, its a TV setup so i need as much volume to deal with the uneven levels of content. Sorry if i wasnt clear the A08 is nice little amp. Guess got lucky with a working unit.
The smsl SA300 sounds great too but the display is faulty.
I don’t own any of these amps but I have two boards in order from AliExpress. I used to work for Texas Instruments I believe they’re specs. They quote 315W into a 4R load and given an adequate power supply and adequate cooling I think that it should meet the spec. From my experience they don’t make things up and the data’s sheets are an accurate reflection of the real world. Ok, there was the odd slip up whilst I worked there but not that many. In the past I have used numerous TPA3166D2 boards which is rated at 40W into 8R and found that they all perform as the datasheet predicts,