Jitterbugs from Audioquest and the Regen

I have been using an iPurifier for almost two years. I remember when I first tried it, I immediately noticed an improvement in musicality that made it easier to listen to computer audio via usb. I recently received a Jitterbug and placed it in an unused usb port on my Mac. The music was clearer but there was a slight but perceptible loss of loudness and bass. Then I tried the jitterbug alone between my Mac and usb cable (i.e. no iPurifier at the dac end of the usb cable) and the sound opened up, the stage was noticeably deeper, and more detail became apparent. There still may be some shortfall in bass but I'm not sure about this yet. There was no change in loudness so that would appear to be due to the combination of the two devices. Very different from the iFI iPurifier which now sounds like it is filtering a little more than it should. I have not tried the Jitterbug and the iPurifier together on opposite ends of the usb cable though. Btw, Audioquest does not recommend doing this. I ordered a second jitterbug just to see what affect, if any, it may have when used in an open usb port on my mac with the first jitterbug on the usb cable. I have not tried the Regen. I refuse to go crazy with all kinds of band aids for usb audio. Think I am at the point where it's just not worth it. I'd rather futz with my turntable.

Ozzy et al - had the Jitterbug a couple of nights now...maybe 16 hrs or so on it. Have to say, so far, I'm not hearing any improvement with it. Set up is exactly as described in my 8/15 post above. Will give it some more time before deciding whether or not to return it to Music Direct - but out of the box, "nada". I should comment that I don't leave it plugged into the MBA 24/7. I put it in when I'm going to listen to music with headphones. Headphone listening can go 2-3 hours. Glad for all for whom it works.

Just an update.
I had the iFi Purifier and the iFi USB power supply.
I found that they did not work well with the Regen.

To me the Regen is the best overall improvement for Audio. Adding another Regen adds another layer of depth. And then adding the Jitterbugs improved upon that.

I have also noticed an improvement in my UHD 85" Samsung with a couple of the Jitterbugs installed in the open USB's.
The picture becomes even more 3D like.

I haven't heard the Schiit Wyrd, but I really like the USB Regen and two Jitterbugs I am using. I am going to try what Jc4659 suggested - i.e., try taking the JB out of the path to my USB converter.

Just to clarify my experiences so far, using a JB in an unused usb port on my mac with an iFi iPurifier between the usb cable and dac seemed to lower the loudness and also diminish the bass. Used alone, the JB resulted in more detail, depth, and openness. I haven't listened long enough to definitively say I like the change as it is more detail than I am used to hearing. But compared to using nothing, i.e. computer to usb cable to dac, it's much better (less glare). I'd like to try 2 JB's- one on the cable and one in an unused slot but have not received the 2nd JB yet.