kemmler3D
Master Contributor
$9 for inline PEQ is a no-brainer! Very tempted...
earl4proxyvoting.com
I suspect it’s actually the KT02H20 (not -02), the high-end version of the KT02xxx family of USB DAC/Amp from KTMicro:the DAC is a "KT02H02"
google brings up nothing so i would assume its some China only cottage industry fab
I suspect the same. Specs are in post #8, good fit with the priceI suspect it’s actually the KT02H20 (not -02), the high-end version of the KT02xxx family of USB DAC/Amp from KTMicro:
These chips are quite common in entry level USB dongles, adapters, or IEMs (USB-C IEMs that is). Each version appears to include a DSP offering up to 5x filters, but the corresponding configuration app (Android, but could be Windows, Chrome extension, Linux, MacOS) is not always implemented by the OEM… or it requires a unique firmware on the chip side. Tanchjim and Moondrop are using other versions of DSP-enabled KTMicro chips (KT0210).
KTMicro may not be very well known, but if you peak at their website, they do offer a range of digital/analog chips.
Since Moondrop FreeDSP was mentioned earlier, that chip and its variants (Moondrop May and Dusk) is not from KTMicro. Based on pictures, it seems to be a CX31988 from Synaptics (Conexant), the same chip used in the Yongse Y01 recently reviewed by Amir. I could not find much information about that chip: it includes an ARM MCU (Cortex M0?) and, based on my experience with the Moondrop app, the DSP implementation (9x filters) is… finicky!I suspect the same. Specs are in post #8, good fit with the price
Yes I think it will be good but a pity it hasn’t the power of FiiO similar KA11 - but looking forward to play with mine when it arrivesSince Moondrop FreeDSP was mentioned earlier, that chip and its variants (Moondrop May and Dusk) is not from KTMicro. Based on pictures, it seems to be a CX31988 from Synaptics (Conexant), the same chip used in the Yongse Y01 recently reviewed by Amir. I could not find much information about that chip: it includes an ARM MCU (Cortex M0?) and, based on my experience with the Moondrop app, the DSP implementation (9x filters) is… finicky!
On the other hand, my experience with the same Moondrop app with CDSP, Jiu, & Chu-II-DSP, as well as Tanchjim DSP-enabled IEMs—all KTMicro-based—has been much better, more reliable, even if I only have 5x filters to play with.
So, as long as FiiO does not screw up their app, the JA11 could be a very interesting way to add DSP capabilities to any IEM and easy to drive Headphones connected to a phone, PC, PlayStation etc.
I hate charging things so no Bluetooth for me I usually keep my phones for years and micro SD is a must, I keep all my music there compressed in opus 160-200, I mostly listen to IEMs outside on walks/runs.i feel like if i'm mobile or i'm at work then i can put up with bluetooth
if i'm home sitting at a desk or i'm in bed on a laptop then i'm ok with something hanging off the type c port
but use your own judgement... also think about how long you keep a phone
Hmm, that's good to know I guess. I have a silver one coming so I'll see if maybe my first one has some issue. I tried it on my S6 lite tablet and it was doing the same stuff as on my V60 so doesn't seem to be an issue with my device.Got mine today. No complains using the app and setting up EQ and everything, much better first time use experience than the freedsp app actually. 5 PEQ with no restrictions, master gain level.... it seems great actually. While waiting for it I even thought of opening it up to try to uncover the DAC chip mystery but no way, this is a keeper.
The only little problem I saw is the power consumption, ca. 120mW Vs 55mW with the freedsp in exactly same conditions, not ideal for mobile phone usage... But please take this with a grain of salt, test was with music and different IEMs. Will try to run a more controlled test one day.
www.androidcentral.com
Correct. You can adjust it "on the fly" until you close the Fiio app or replug the dongle, or there is an option "save to device" which makes it the default. Same thing goes for the volume.I take it that the PEQ settings is saved on the dongle itself, so if I dial in some settings on my Android and then plug it into my computer the PEQ will still be there?
This for the volume I found it surprising, but I can see it being useful if you have kids.. Same thing goes for the volume.
I haven't notice any difference compared to a CX31993 dongle, I use it for about 2-2.5 hours a day, maybe in not long enough to notice.The only little problem I saw is the power consumption
Just tested low shelf at 200Hz with +3db gain and it is very noticeable. It would be better to just measure it but it seems ok to me.I haven't notice any difference compared to a CX31993 dongle, I use it for about 2-2.5 hours a day, maybe in not long enough to notice.
No connection problems for me.
Are the Shelf-filter working properly? For me even 12dB changes make little difference.
Thanks I am going to reload the firmware and check again, I tried with a High-shelf filter (8000Hz at first and then 2500Hz to test) and it made almost not difference I tried against Equalizer APO on the PC not as smooth but it was the only way for me.Just tested low shelf at 200Hz with +3db gain and it is very noticeable. It would be better to just measure it but it seems ok to me.