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I'm using a micro SD card (Amazing how much music can fit on such a tiny thing!) which made things a bit easier. I've been using mpd with Raspian and this dongle for a few days now and it seems fairly OK. It's not perfect (there is still the odd glitch) but it's fairly usable. I'm amazed how...

barrelhouse solly - I know what you mean about configurations. I've been using mpd with MALP for the last while and it's just worked. Maybe I need to edit config.sys to set the IRQ and DMA channel of the USB driver, and perhaps load a TSR to reprocess the audio sample rate, then add mpd into my...

Oh - thanks for replying. Was the RPI4 OK with this dongle or did it also have the dropouts? I've not tried the Zero 2W for a huge amount of time, but it did seem to be OK. Maybe the dropouts just make it sound like a vinyl record, with the occasional clicks...This is the DAC to bring the...

Following this up: I noticed a post at https://www.diyaudio.com/community/threads/raspberry-pi-moode-meizu-hifi-dac-hiccups.378954/post-6839491 which helped. This post says that these devices use synchronous USB, so need a processor interrupt every 125us - and had a theory that the single core...

It's not quite what you're saying, but almost is: I've had success using a USB PD trigger cable to power my Aiyima A07 amplifier from a battery. - Search "USB PD trigger Barrel jack cable" or similar. The TPA3255 amplifiers seem to be happy at 20v. It's quite neat running a HiFi with a...

I'm posting this as I think it deserves a separate thread to the other CS43131 threads. I know there have been reports in other threads of 'clicks' when using some of the CS43131 dongles but I think this is a different problem (or perhaps not!). TLDR - My JC20 dongle seems to not be happy with...

That's a fair reason ;-)

Rja4000 - Interesting - thanks for trying. Was there a reason you used only one speaker rather than two? It shows at least my idea wasn't completely silly. It looks like the E1DA device you used has a higher output power than the JC20 Max I was thinking about. boxerfan88 - Do you know what the...

Thank you for the correction of peak vs RMS. I'll stick to DC only in future... No peak/RMS to get wrong ;-) Rja4000 - I'm interested to hear how you get on. I have been enjoying the sound of the JM20 dongle with my Sennheiser HD25 headphones. I've no idea how these headphones measure, but...

Thank you for the replies. I originally thought that this experiment could be an cheap+easy way to hear what a "very high performance" amplifier would sound like - and see if I can hear any difference compared to the TPA3255 Aiyima A07 amplifier I'm using. This would be an easy way to see if an...

Hello, I've been reading the thread "JCMALLY JM20MAX Headphone Dongle Review" - https://www.audiosciencereview.com/forum/index.php?threads/jcally-jm20-max-headphone-dongle-review.62260/ The specs on the box state output power of 192mW into 32 ohms. I was curious - would it be feasible to use...

Thank you for the advice. Good to know about REW - I'll download it and experiment. I need to get some parts before making the amplifier cable so don't think I will get to the soldering immediately, but I will report back with what I find...

Thank you for your reply - I think this confirms what I was saying, which is nice. There do seem to be packages such as https://rug.mnhn.fr/seewave/ which can analyse WAV files, but I'm wondering if there's something a bit more like REW/ more of a complete tool rather than requiring extra code...

I feel this might have been covered before, but I can't find an appropriate post... TLDR: I'd like to measure CD player+amplifier+speaker frequency response and distortion using a Tascam SD-card audio recorder as I don't have a Microphone. Is this do-able relatively easily? I've got a couple...

Insides of the Tannoy: I think these LSU/15/8 might be similar drivers as in the Westminster cabinet that @Waxx posted on the previous page. The Lancaster cabinet looks tiny in comparison however!!

A selection from the 1970s: Tannoy Monitor Gold in Lancaster cabinets, from 1973 Rogers Compact Monitor, from 1979 Acoustic Research AR6, I think from 1974 (Focal Aria 906 on top, which don't count as old) The Tannoy and Rogers both sound amazing (to my ears), but in different ways. The...

I've used this adapter: https://www.ebay.co.uk/itm/393021327694 Successfully with my Aiyima A07 amplifier. I'm powering it from an Anker power bank which gives 20v output and it works well. The page for this specifies "19~20V output power: 90W". I don't know if it would output the full 26v...

I've been using the amplifier powered at 20v from a USB-C power adapter. I switch it on and off at the power adapter end, and it's pretty much OK. There's a very slight audible click, but nothing concerning. Probably similar to the click of the A07 or pretty much any other amplifier I'd think...

OK, so a follow up... The power switch controls the enable pin of the XL7015 regulator. This explains the 'pop' - the analogue circuits are just switched off, but power is still applied to the TPA3255 main rails (I think). The TI TPA3255 EVM schematic in...

So I I think grogi.giant is correct. I opened up the two devices to compare them: A07 - with extra parts DA300 - no parts The A07 appears to have a CJT1117 3.3v regulator and an unknown 8-pin chip. I found This page (I needed to translate it) which suggests it is a small...