Can two BTR5s be synced with each other, so you can have one set of headphones (i.e. the Aeon 2 closed) and have each 4pin cable connect to a separate BTR5 on each side? I might be misunderstanding what is written on the Fiio Website - https://www.fiio.com/btr5
I think they are just explaining how they use two/dual dacs with their balanced output design. Though they are wording it pretty weird.
Yeah Robert is right, the BTR5 uses two seperate ES9218P DACs in balanced mode, one for each channel. In single ended mode just one DAC is used. Theyāre the same quad DACs as found in some LG phones, but two of them. So dare I say it, in effect, octo-dacs?! 
You raise an interesting thought experiment though. The BTR5ās donāt sync with each other, but I wonder if you connected a couple up to a transmitter capable of multipairing and wired up a suitable cable for each side of the Aeons if theyād be in sync or give you an instant headache.
Hereās an odder thought - and maybe closer to what you were hoping for - if you could somehow sync them, bridge the two amps in each unit, turning them into single channel monoblocks, and wire one to each side of the headphone. Thatād be close to half a watt per channel right?. And almost certainly utter madness/drivel. Time for bed! 
Yes, that is what I was thinking āif you could somehow sync them, bridge the two amps in each unit, turning them into single channel monoblocks, and wire one to each side of the headphone.ā Is that even a possible option for two BTR5s?
I donāt think so no. Brainstorming, I guess you could seperate left and right at source, run two transmitters with one running L on both of its channels and the other running R on both of its channels. Thatās assuming that the transmitters stay synced which I doubt would happen, not with the variance in lag. If they did stay synced you could link a BTR5 to each of them and at that point you would have the potential of using the balanced outputs to drive either side of a headphone I guess, but as the driver is expecting a mono input youād end up shorting the grounds of the BTR5 and bad things would happen. If you somehow had a headphone that could be bi-amped then it would have the potential to work - again assuming the two sides stay synced. Thatās a lot of assumptions! So I reckon the answer is almost certainly no, itād be much better to just use a more powerful Bluetooth dac/amp to begin with.
Found one!
Dude! You canāt just post a pic and give no link, youāre playing with my emotions! How long is it? Looks nice and short. Itās funny you should post that right now, cos a few hours ago Amazon delivered these -
FiiO CL06 Type C to Micro USB OTGā¦ https://www.amazon.co.uk/dp/B07DLQ2XYZ?ref=ppx_pop_mob_ap_share
UGREEN USB C Micro USB Adapterā¦ https://www.amazon.co.uk/dp/B073VH55WF?ref=ppx_pop_mob_ap_share
They work fine, the only issue is that my phone charges the BTR5, which isnāt ideal. I canāt seem to find a way around it, thereās no software option (except one that may possibly work if I root my phone and edit some system files) and hardware wise I donāt think I can snip a power wire without screwing up the sync too.
But where did you find that cable? Do tell! 
Haha. Iām going to blame HiFi Guides for that one. I actually posted the link and it converted it to the image.
Xduoo has it on their page. Sorry I didnt find it sooner!
I forgive you, I suppose 
That looks spot on, thanks very much. After all the Googling Iāve done I canāt believe I never once came across it, Iām pretty sure I reached the end of the internet. Iāll see if I can find one in the UK, thatās the next challenge
When I was looking for portable DAC/amps to drive my P1s, at one point I had considered the xDuoo XD-05 and the Plus. I dismissed them in the end because theyāre huge and not that quiet for IEMās, but I was leaning towards the Plus because it was USB C rather than that full sized male A plug/socket thing (which oddly FiiO have chosen for their new Hip-DAC?!). So clearly an xDuoo C-C cable must exist to attach the Plus to a phone or DAP. If only the different parts of my brain would talk to each other occasionally my life would be so much easier 
I wonder if the xDuoo cable will charge the BTR5 like this FiiO cable does. The FiiO cable comes with a warning saying that while your phone may say itās charging your device, itās actually not. Well tell my BTR5 and phone that, FiiO, cos they beg to differ. I may well end up spending more on cables than I did the flipping DAC!. Thanks again anyway, Iāll get one ordered
Funny, I was actually reading your response and thought, āDid I write this?ā. I was looking at the amp for the same exact reason. Zeos had the P1 paired with the xDuoo and I loved it. When I bought my own P1, Iāve been disappointed. I canāt get what I want out of them.
When I was lookimg at the site, I remembered seeing your post. The rest is history.
Well Iām glad someone remembered something at least!. I was just Googling for that xDuoo cable and I swear itās a ghost, I canāt find a single link to it, even to their own site. If you didnāt know it existed youād never find it. What have you got to hide, xDuoo?!.
Iām sorry to hear youāre not happy with your P1s. I was a bit underwhelmed until I chucked a decent gob of power at them and they really opened up for me and they quickly rose high on my list. But I guess youāve already done that and theyāre just not for you. If itās the bottom end then you can cover the vent holes and raise it a few dB, and theyāll take a bit of EQ to raise it a little further too, but theyāre definitely not the best for that.
I must admit when I bought the Shuoer Tapes it was immediately clear what Iād been missing down low! I love those IEMās dearly, although I dialled back the lower treble a smidge. Still, for female vocals and acoustic stuff the P1s are some of my favourites, even when Iām not on the go. But different strokes for different folks I guess, phones that rock someoneās world will leave another person absolutely cold. I guess thatās why thereās a million of them out there!
May I ask if youāve had experience with one of the Mpows that Zeos previously recommended?
Would really like to know if theyāre good enough for entry-level or save up for these proper BT audio ones.
I would say grab a fiio ubtr or btr1k instead. As those are pretty decent and cheap.
I canāt say I have. However, I think it really depends on what you are using it for. In the car or on low-mid level speakers, the MPOW will probably cut it. I bought the BTR5 because I wanted to power full size headphones and power-hungry IEMs. What is your setup? As RiceGuru mentioned, I would go with Fii, specifically because they have a great reputation.
Thanks for the recommendation! Though I found these to be priced oddly where I could get them. The ubtr seems too high at $40, then btr1k ($55) is so closely priced to the btr3 ($60). Seems like the btr3 is the best deal I could find, is it a mistake to go for btr3 now that btr5 ($120) are out (of stock lol)?
@The3rik I plan to use it as an all-around solution and to expand around it with future gears. I donāt have any amp/dacs yet so I thought these could fit right in for both portable use and as a desktop dac instead of my planned Fiio K3/Sonata dongle dac.
I currently have budget Chi-Fi IEMs from KZ and Blon, ksc75, kph30i, Pro 82s, and Blon B8, also planning for proper open-backs soon like the shp9500, hd58x, he4xx, and proper bookshelf speakers from edifier, I currently have a 2.1 set from logitech that sounds too bassy so I donāt use them much.
Interesting. Do you mind if I ask where you are? I agree with your assessment. Those are likely too high for what you get. However the BTR3 is still very good at that price. Great features and plenty of power for what you have. Here is why you were recommended BTR1K OR UBTR. These are the price points in the states.
MPOW - $20
UBRR - $22
BTR1K - $40
BTR3 - $70
ES100 - $100
BTR5 - $130
Those prices are accurate for what you get. Seems like a great deal for the BTR3.
Almost pulled the plug on these but opted for the Shanling UP2 instead. They donāt get a lot of love but at 67mw output power they should be enough for Tin T2s and 80 dollars seems like good value. Hopefully I wonāt regret it cause the BTR5 also looks great.
I rely on Asian ecommerce sites locally available here in the Philippines like Lazada and Shopee, then Aliexpress if I canāt find the item locally like the btr5 but bearing that slight issue of shipping time and customs tax. I do check the Amazon US price points and see how close I could get to retail price here since most resellers here would greatly up the prices, I once found Fiio K3 at $180!
BTW I noticed the uBTR in white is actually closer to retail at $30 but I realize they canāt be used as a desktop usb dac which the BTR1k and BTR3 can. Iāve been meaning to ask, would you recommend these tiny devices anyway to be used as desktop dac on a daily basis though? I really feel like I could skip the dedicated budget desktop amp/dac combos like the K3 since these exist now.
That makes sense. Iām not sure about the desktop DAC question. The BTR3 does work, but I havenāt used it that way. The BTR5 is a great option for that. Someone else would have to weigh in on using it for desktops. My guess is that they all work great.
