• If you ever spot Spam (either in the forums, or received via forum direct message) please use the Report button at the bottom of each post to make sure a Moderator can handle it quickly. Thanks for your help in keeping things running smoothly!

Why is there a DAC in wireless headphones?

radiorog

Well-known member
Jan 1, 2013
116
11
18,595
As per title, why? I send a digital signal from my phone via bluetooth to my amp (with no internal DAC) so using the DAC in the phone, and music is made. So then why do my headphones need a DAC when sending the signal from my phone, via bluetooth, to them? The headphones I'll be using are B&W PX7. So if this is the case, is the digital signal going through 2 DACS? If thats the case surely the sound is going to be quite compromised.?
Thanks.
 

abacus

Well-known member
Sep 24, 2008
461
188
19,070
Bluetooth is a digital transmission system, which means the analogue has to be converted to digital before transmission and converted back to analogue at the other end. (This is why both your phone and amplifier have a Bluetooth transceiver built in)

Bill
 
  • Like
Reactions: nopiano

radiorog

Well-known member
Jan 1, 2013
116
11
18,595
Bluetooth is a digital transmission system, which means the analogue has to be converted to digital before transmission and converted back to analogue at the other end. (This is why both your phone and amplifier have a Bluetooth transceiver built in)

Bill
Cheers Bill, but my amplifier doesnt have one.
Or maybe it does but this would be the first I've heard of it. Cant find any mention of one anywhere....
 
Last edited:

abacus

Well-known member
Sep 24, 2008
461
188
19,070
If your amp does not have a Bluetooth transceiver built in (Or a separate Bluetooth Dongle) then it cannot playback any music from a Bluetooth device unless the device is plugged directly into the amp. (Which means Bluetooth is not being used)
What amp is it?

Bill
 

Al ears

Moderator
Its a Roksan K3. It has a bluetooth receiver built in definitely, but that not a DAC though is it?
The Bluetooth receiver must be converting it to analogue, it used APTX Bluetooth and conversion has to take place somewhere. This is what happens in seperate add-on Bluetooth receivers
 
Last edited:

radiorog

Well-known member
Jan 1, 2013
116
11
18,595
Ok cool, so looks like it must have a DAC then. Cant believe Ive only just realised this.
How come my nexus tablet sounds so different (its all relative) to my S8 phone? Is it simply because the S8 uses AtpX almost HD, but the tablet uses plain bluetooth? I had originally attributed it to the different DACS and the bluetooth signals (I now know its not the different DACS).
 

Al ears

Moderator
Ok cool, so looks like it must have a DAC then. Cant believe Ive only just realised this.
How come my nexus tablet sounds so different (its all relative) to my S8 phone? Is it simply because the S8 uses AtpX almost HD, but the tablet uses plain bluetooth? I had originally attributed it to the different DACS and the bluetooth signals (I now know its not the different DACS).
It's probably just a codec converting chip rather than a full blown DAC board that would allow differing digital connections that the K3 doesn't have.
 
Last edited:

ASK THE COMMUNITY

TRENDING THREADS