Author Topic: DAP game changer  (Read 6034 times)

Offline canman1971

DAP game changer
« on: July 23, 2018, 01:18:38 PM »
http://hifiman.com/products/detail/293

Dual BB - PCM1704K R2R DAC chips  :rubhands:

Offline jvr

Re: DAP game changer
« Reply #1 on: July 25, 2018, 04:10:50 PM »
Looks nice, the BT tech sounds promising and should make its way to other commercial (*read affordable) tech. This is a bit expensive, even though it ticks a lot of audiophile boxes. 
Lend me your ears

Offline GoodEnoughGear

Re: DAP game changer
« Reply #2 on: July 25, 2018, 04:15:03 PM »
I thought Kingwa bought up all the 1704's?

 :ROFLMAO:
Mobile: LG V60, CA Andromeda
Portable: LH Labs GO2A SE, KEF M500
Home: Soekris DAC1541, Genelec 8030+7050, Eddie Current Black Widow II, HD600

Offline canman1971

Re: DAP game changer
« Reply #3 on: July 25, 2018, 09:20:13 PM »
No he didn't  :giggle:

Offline canman1971

Re: DAP game changer
« Reply #4 on: July 29, 2018, 12:30:11 AM »
In bound soon

Offline Wolvebain

Re: DAP game changer
« Reply #5 on: August 11, 2018, 05:09:30 PM »
Is there a difference between the PCM1704K used in this DAP and the PCM1704UK (That Kingwa put in my DAC) ?

I have considered this DAP, but went for the A&K Kann instead (various reasons, including storage, 7Vrms, battery life, UI, DLNA support, etc.)
Why stand on a silent platform?
Fight the war...

Offline canman1971

Re: DAP game changer
« Reply #6 on: August 11, 2018, 09:29:46 PM »
Congrats on the DAP  :thumbs:

Data Sheet sent via e-mail on BB PCM1704 DAC Chips

Note: Both Versions K, U-K are considered high performance. Dynamic Range: 112dB typ, SNR: 120dB typ. THD+N: K Grade = 0.0008% typ. U-K version = greatest dynamic performance.

Offline canman1971

Re: DAP game changer
« Reply #7 on: August 12, 2018, 11:42:32 AM »

Offline Wolvebain

Re: DAP game changer
« Reply #8 on: August 12, 2018, 12:46:32 PM »
Awesome...
Let us know how it plays (sounds, battery life, headphone driving capability, etc.)

From what I have checked, the PCM1704K used in this DAP and is the same PCM1704UK used in my NOS11.
Why stand on a silent platform?
Fight the war...

Offline canman1971

Re: DAP game changer
« Reply #9 on: August 12, 2018, 01:06:15 PM »
Will post some impressions in this thread  :thumbs:

Offline canman1971

Re: DAP game changer
« Reply #10 on: August 12, 2018, 02:36:53 PM »
Awesome...
Let us know how it plays (sounds, battery life, headphone driving capability, etc.)

From what I have checked, the PCM1704K used in this DAP and is the same PCM1704UK used in my NOS11.

Its very sad that Texas Instruments bought out Burr Brown and don't see the need for manufacturing PCM1704 R-2R series chips due to cost. These chips were so accurate - shortest signal path - fast, low noise, gain error correction, bipolar zero offset, temperature gain and offset drift. IMPO i doubt that a discrete resistor R-2R DAC can offer the same performance due to a longer signal path (PCB tracking and solder joints), resistors susceptible to noise, matching resistors operating at different temperatures - drift.

Offline Wolvebain

Re: DAP game changer
« Reply #11 on: August 12, 2018, 02:59:08 PM »
I have listened to some folk's R2R 11's, and they are not has detailed, spacious, clear, etc. etc. as my NOS11.
But that could be more than just a difference between discrete resistor R-2R vs PCM1704UK... It could also be the overall design & implementation.

When my Kann arrives, and I'm back in GP for a longer period (and not sick), let's do a comparison between the DAP's... With both our headphones:
Your HiFiman HE1000V2, Sennheiser HD800, Sennheiser IE800
My Audeze LCD-4, Sennheiser HD800S, Ether C Flows*, Shure SRH1540*, Shure SE846* (* Planned on pairing for work and out-and-about)

For my use-case, I don't think I'd get the R2R2000... unless the reviews of the Sennheiser HD820's are epic.. and I'm confident that I can use the pairing as my work and out-and-about setup (far too scared)
Why stand on a silent platform?
Fight the war...

Offline canman1971

Re: DAP game changer
« Reply #12 on: August 12, 2018, 11:16:20 PM »
Its very sad that Texas Instruments bought out Burr Brown and don't see the need for manufacturing PCM1704 R-2R series chips due to cost. These chips were so accurate - shortest signal path - fast, low noise, gain error correction, bipolar zero offset, temperature gain and offset drift. IMPO i doubt that a discrete resistor R-2R DAC can offer the same performance due to a longer signal path (PCB tracking and solder joints), resistors susceptible to noise, matching resistors operating at different temperatures - drift.


MSB is definitely at the forefront of discrete resistor R-2R technology - would like to know if anyone owns The Reference DAC or The Select DAC in SA?

Offline canman1971

Re: DAP game changer
« Reply #13 on: August 15, 2018, 01:03:29 PM »
Will post some impressions in this thread  :thumbs:

Everything i expected it to be and a bit more... Im unable to post an impression at this time (unit is 0573 off the production line), there are no international reviews as yet. Is it worth $2500-00 in my opinion yes.

Those who own Wadia, Audio-gd and a few other brands that used BB PCM1704K / UK DAC chips - do not sell.

Offline Wolvebain

Re: DAP game changer
« Reply #14 on: August 17, 2018, 01:03:30 AM »
Glad that you are enjoying it....  Great purchase there, bud!  Wish you tons of pleasurable listening hours.
Even tho I LOVE the sound of the PCM1704UK chips, $2500USD is way too rich for me tho... 

But!!! Still colour me all shades of green with envy! 

$999USD for the A&K Kann is already pushing it for me... Mainly cos of my use case for the DAP as my work and out-and-about source.  Can't really do much critical or relaxed, pure music focused listening in the use case situations.
I have, however, justified it, as my 40th birthday's guilty pleasure self-gift (along with a 512GB SD card and a 2.5mm balanced cable for my SE846's)  :p

I strongly suspect/know that my A&K Kann is going to be rather feeble compared to your HiFiMan R2R2000 (cos you say it's worth $2500USD).

Why stand on a silent platform?
Fight the war...