My original Zero DAC headphone amp also just stopped working out of the clear blue recently.  Does anyone have a schematic for it?  I suspect it is the DAC board and not the power amp board because I can hear the hum from each channel through the headphones as I touch and probe the audio IC chip...

Hey it's now 05/17/2015 as I reminisced through these headphone forums... and see, yep, everyone went to sleep on this thread and never answered. I don't remember what had transpired exactly between then and now but all I know is that I have a Zhalou DAC headphone amp in my collection that I...

I agree with much of your points however, I have no issue with the AZIO or Supertech CSR USB 4.0 AptX enabled dongles.  They work perfectly fine for me for streaming AptX to my Bluetooth headphones and receivers.  I have now both the Avantree Priva (bought it again cheaper on eBay)  and I have...

I just want to update y'all on this. Avantree never sent the new Priva to test.  Said that they will be delayed due to problems with the new unit still.  So I don't know if they really are going to send me a new unit to test or if they were just trying to give a good PR image. Looks like they...

As far as I have experienced with my MDR-1RBTMK2 AptX connection sounds smoother than non-AptX connections. I don't think it will make a difference in the amount of bass response you hear with AptX vs SBC connection. When I first got the headphones I thought I heard more of a mid-bass hump when...

I've thought about that idea many times! But I feel bad about the $200+ USD that I wasted on them lost!   I may one day try putting the dampening mod in place to see if it would diminish some of that midrange peak. However, I don't think covering that vent up would increase the bass, it most...

Actually I believe I had really broken these headphones in a long time ago as I said.  I ran them for hours and hours on end with all kinds of loud music (bass, midrange and treble) and even ran my pink noise and white noise tests through them. It's not that they sound horrible. Just that I was...

Okay, thanks for confirming that some were made in China. I was concerned because I had read that folks with original Sony's had "Made in Thailand" on the underside of their headband.  I guess they started manufacturing them out of various locations. Maybe the ones made in China sound worse than...

Hi , wow! So you are saying that the ones I have and have shown here are the real Sonys? Then I can't vouch for everyone raving about the sound quality out of them. Mine sound like crap from day one to now 8 years later when all the materials in them should have settled out and mellowed out. ...

Here are a few more pictures of my particular set of Sony MDR-7509HD headphones with "Made in China" stamped underside the headband purchased in year 2007 on amazon.com... Are they like the real Sony's or are they fake?! I think these are fake ones since the sound is terrible out of them.  But...

Reviving this thread since I just discovered that the Sony MDR-7590HD headphones I bought off of amazon.com back in 2007 probably are fakes. I always wondered why they sounded like pure crap when there were so many rave reviews for their sound.  I was so disappointed in them that I threw them...

I agree with this assessment of the MDR1RBTMK2.  They do have a mild mid bass hump both wired and Bluetooth mode.  They are not lacking in bass presentation.  They present overall a very well balanced sound from highs to lows.  They are detailed without being harsh in any part of the spectrum. ...

Hi, my battery had a good charge on it too out of the box so that might not be a tell tale sign.  The battery on this headphone lasts a long time. It's pretty good.  If there is nothing wrong with it, you might as well keep it.  My MDR-1RBTMK2 turned out to be great well balanced Bluetooth...

I bought my pair from amazon.com too but paid $295 for them. They've then dropped the price down to $285 right after I bought them and then upped the price again to $288 I see. Anyway, I got what seemed to be a brand new one and my box outer sleeve cover does not have extra stickers stuck over...

Hello Class D, yes I am aware of all the settings modes and yes the Sony MDR1RBTMK2 is exactly the same as your MDR10RBT setup.  I also just received my other pair of Sony MDRXB950BT today (from Japan) and they are configured exactly the same way using the power on/off button and the Volume...

Phoebe at Avantree said she is arranging to send me a new updated Priva to test. I have no idea how long it will take for them to send it to me. But I am looking forward to it to see how it compares with what I've already tried and tested. You are right about Avantree support, they really do...

I tested between the 2 modes (Standared and AptX) with the Sony MDR-1RBTMK2 just now connected to my AZIO Bluetooth 4.0 AptX USB adapter plugged into my Samsung high end gamer laptop and I can confirm that in AptX mode the audio sound is smoother sounding than when in regular Standard SBC codec...

I hear slight difference on quick comparing the sound when paired with AptX and with SBC codec mode. They both sound really good on these Sony MDR-1RBTMK2 headphones. But I can clearly hear that when it is connected in AptX mode the audio is a bit cleaner and smoother sounding. The SBC mode is...

I've already tried that connecting to my laptop using the AZIO USB Bluetooth AptX adapter and yes putting the Sony MBR-1RBTMK2 into the Standard mode and connecting to the laptop, CSR AptX Logo does not pop up. As for the Priva, I don't have it anymore as I said earlier, I have returned it. As...

Avantree support rep responded to my email last evening saying that they will escalate my issue concern to their developers and also said she would like me to test out an updated version of the Priva for free. I was impressed with the response.  But after I said I would accept the offer to test...

Okay, I suppose then that since it could be in A2DP mode with the LED blink 2x interval, then it could be using the AptX codec mode too. So maybe it's okay. But I want to confirm that the Sony is really indeed using the AptX codec during this 2x blinking mode.  There is no way to do that I guess.

From the Sony English documentation I see, they provide a chart showing what the blinking LED status lights represent. They don't specifically mention AptX mode but rather specify or describe the mode that AptX is supposed to be enabled and working as "Playing music or During a call (Connected...

Yes, I have already fired off my issue conerns to both Avantree and Miccus. Let's see how they respond.

I suspect that the Avantree Priva and the Miccus TX4 are using the same chipset and software/firmware and that's why they both exhibit this bug. I use the CSR based AZIO Bluetooth AptX USB dongle and also the similar SuperTech Bluetooth AptX USB dongle on my Windows 8.1 Pro 64 bit PC's and the...

Question for those of you that have the MDR1RBTMK2 headphones and either of these standalone Bluetooth AptX transmitters: Avantree Priva or the Miccus TX4. I have these transmitters and noticed a strange symptom of concern to me when connecting and pairing my headphones to these transmitters in...