Allo Boss DAC review


(STEPHANE L) #35

Hi, the question was for Allo and the Boss Dac (that is, if you were replying to my question!).


(Sean) #36

Whoops, my apologies. I did click the post (not thread) ‘reply’ button but the arrow doesn’t show above, to show that I replied to you. Apologies again.


(johan ) #37

Yes if you want to connect to it , you need to desolder some resistors. We will add the info on the website

We don’t recommend it , but was included.


(STEPHANE L) #38

Thanks. I actually posted a comment on your forum and got an answer. I will not do the modification. Sounds great as is.


(johan ) #39

Enjoy :slight_smile:


(Janis) #40

I had possibility this week to review the new updated Boss.

The updated Boss is excellent!

All concerns I had are now fixed/ gone.

  1. Perfect presence of high frequencies with precision, transparency, and lightness. That give this amazing feeling of music defying gravity and flying - one step closer to hifi ecstasy!

  2. Positive impact also on vocal reproduction, previous sensation of mid tones being washed with low frequencies is reduced. Voice has much better sonority and is easy flowing through air.

Also I compared the Boss to combination of Kali clocker and Piano DAC. I didn’t believe what I heard… the Boss was so much better!!!
Boss sounded much more colorful, dynamic, with rich bass, broad sound volume, and wide stereo base. Kali+Piano in comparison was still giving accurate sound, but more flat and short.

Based on previous testing the Kali+Piano was the best available DAC in market for Raspberry Pi - outperforming the HiFiBerry and IQaudIO products, as well Audiophonics I-Sabre V3 DAC running of ES9023.

The only currently better chipset implemented for Raspberry Pi DACs is Sabre 9018K2M, but the released Audiophonics DAC still engineering work in progress; however, new updated version with driver support is expected to come soon. Also I’m very curios to see when Allo will release their DAC on AKM AK 4497 chip - that will be first high end DAC on Raspberry Pi.

Boss is by far the best Texas Instruments PCM5122 chip based DAC in the market, based on unique technological developments that Allo has put in it: triple power cleaning lines, super capacitor, two high quality 44.1 or 48 kHz master clocks driving Raspberry Pi I2S signal process, with extremely low noise & jitter levels achieved.

Janis


(Janis) #41

I haven’t compared Allo Boss vs. HiFiBerry Dac+ PRO directly, but there have been other tests done on HiFiBerry Dac+ PRO - which is quite average product and not even on level of Audiophonics I-Sabre V3 DAC running of ES9023 or Kali + Piano combination, both giving substantially lesser quality than Boss.

So, if you would move from HiFiBerry Dac+ PRO to Allo Boss - you will have major quality improvement.

Another point, with triple separate power clean up done on Allo Boss, I don’t see any benefit from using linear PSU or battery based systems. It is as good as TI PCM5122 chip can perform. I doubt you can get anything audible benefit. I have tested other DACs like Audiophonics I-Sabre V3 DAC running of ES9023 and Allo Kali + Piano that have power clean up modules and compared their performance when running on 200$ linear PSU. There was no audible difference. Realistically these Raspberry Pi DACs with built in power cleaners are squeezing max they can from chips and audio tracks used, and there is no real incremental benefit of investing in any other special power supply.

Janis


(STEPHANE L) #42

Same excellent impression from the Boss DAC here. I now use it in my main rig. Tried to power the Pi with an Uptone lps1 and did not notice a difference. Will do some further tests but I doubt my first impressions will change.


(John B) #43

This looks very interesting, can I clarify tow things. On the website it says

what does this actually mean?
Can I can add this to my allo sparky as well as a my Pi 2 and 3?

Does it accept DSD and up to what rates.

Sorry if these are silly questions I really am a bit of a N00b wrt these things.

sjb


(johan ) #44

Hat size basically it has the right dimensions for a HAT , but not compliant since it has no camera grove etc.

DSD only as DOP as its a i2s DAC


(johan ) #45

Boss is a master DAC will not work with Sparky, only with RPI (rpi accepts i2s as master or slave , sparky has only master…cannot have 2 masters on i2s)


(Jesper Billing) #46

Hi Johan@Allo,
I just read this review of your Boss DAC and got really interested in getting one, BUT if I get one I’m only interested in the upgraded version, like the one Janis tested above. I live in Sweden. How to make SURE to get this new one?
Kind regards,
Jesper


(johan ) #47

All mass production units come with right low pass filter (upgraded version like you called them). So no worries… we will never ship faulty units.


(Michel Picard) #48

Hi @allo.com
I read in an other thread that you’re going to make a case for RPI + Boss.

  • Will it be an open box (like for the vana player) or a closed box ?
  • Will it be made of acrylic or metal ? (please make a closed box in Aluminium :slight_smile: )
  • And last question : is there an ETA for this case ?
    Thanks a lot !

(johan ) #49

First acrylic box is coming soon (3 weeks max)… it will be closed but with vents and not very expensive

Second will be made in ALU closed…coming in 5 weeks more expensive


(Henry Larsen) #50

@allo.com I have just installed dietpi on the Boss, that just arrived yesterday. It works fine, but not with the 384, when I install that from Dietpi, the dac is not recognised in Roon. Any solutions for that?
It would be nice to use it beyond 192


(Michel Picard) #51

Thanks @allo.com for the quick answer, this is awesome news !


(johan ) #52

I can ask our team to look at it on Monday, but I suggest you ask the magician aka @Dan_Knight :slight_smile:


(Jesper Billing) #53

Thanks Johan!
I can safely get it then.

I have another question regarding the Allo Boss. The PCM5122 DAC from TI used in Boss, TI states the following:

“Members of the PCM512x family integrate preset audio processing functions with programmable coefficients, allowing developers to change the characteristics of the interpolation filter, speaker EQ, dynamic range controls, and average volume control in their products.”

The “speaker EQ” I’m interested in, as it can give major improvements correcting the speakers EQ to the room. Could the Boss be programmed using a room correction program to measure the room acoustics and then input the EQ settings into the PCM5122?

I guess it´s not set up for that right now, but what can be done now, if any?

Kind regards,
Jesper


(Dan Knight) #54

Hi Henry,

I’ve replied to your post on our forums, please see below:
http://dietpi.com/phpbb/viewtopic.php?f=11&t=1480#p6163