I got the Creative BT-W4. It connects to my B&W Px7 headphones and ODDICT Twig Pro earbuds in AptX Adaptive. It required a little bit of futzing around with the installation and pairing, but once set up the connection is stable and it sounds good. After having tried many USB Bluetooth dongles...

Has anyone tried the Avantree Clipper Pro?  It looks interesting, in that it supports AptX - Low Latency, and is Bluetooth 4.2.

That's great news!

I was mistaken re those USB dongles.  What I need is something with an analog stereo jack (1/4" or adapter-able) that will take that analog output, convert it to Bluetooth/AptX, and transmit it on a Class 1 radio. I will plug this into the headphone jack of my AVR (an Onkyo TX-NR818). AVR...

  Yeah, it would be fine in my living room, but I'd like to be able to walk about the house.

Does anyone know of a Bt 4.x / AptX / AptX-LL Class 1 Source/Transmitter that can plug into an analog 1/4" or 3.5mm jack?  I want to be able to use my Elecom LBT-PAR500 with my AVR.    I've found a few things like this...

I just got the Elecom LBT-PAR500, which seems to be a replacement for the one linked above.  It sounds fantastic!  I loved my HS3000, but it broke, so I got the Elecom as a replacement.  It is a very noticeable improvement - more clear, more powerful/controlled bass. The Elecom is powerful...

Surefire EP- series plugs work fine under headphones.  If you want flat frequency response ones that won't mess up your ability to hear the music properly, custom molded Etymotics are the ticket.  If you are a working DJ/musician, you can get them for cheap(ish) from the H.E.A.R. foundation.

I just got notice that B&H has them in stock, in case anybody wants to get them there.  Selling for MSRP.

Has anybody heard the Asus Xonar U7?   I have the U3, and like it very much, and am wondering if it's worth an upgrade to get the better S/N ratio and the Dolby Home Theater v4.

Late to this reply, but in case you haven't done anything yet;  I have AD700s with a ModMic.  It's a great setup.  I also have the Schiit Magni that was recommended further down the thread. It is also terrific.  However, there is absolutely zero benefit to using it with the AD700s.  I have the...

I have AD700s and AD900s, and am considering selling them and getting either the 900x or 1000x.  Could someone clear up a few things for me?   Do the 900x and/or 1000x have angled drivers?  I really like the soundstage and positioning of the AD700, even more than the AD900, and am hoping...

The O2 would be nearly ideal if it had a protection relay.  

I guess Schiit may have just answered my question with the Magni.  Looking forward to reviews.