ALLO – Boss DAC

5 out of 5 based on 1 customer rating

From: 61.73 $

Units Sold: 167

The best sounding PCM 5122 implementation: 3 separate power rails, 2 ultra accurate NDK clocks and a supercapacitor on signal path. This means that this DAC will let you enjoy your music in all its greatness. If you’re looking for a great sounding DAC at the right price, look no further.

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SKU: BOSSDAC. Categories: , .

Product Description

To put it short: the best implementation of PCM 5122 for Raspberry PI. Period.

The Boss DAC from ALLO is a master DAC that’s simply a best buy: if you’re looking for a great sounding yet not very expensive I2S DAC look no further.

What makes this DAC so special:

  • 3 different Power Rails, with individual filtering. One for the DAC chip itself and the digital side, one for the analog stage and one for the oscillators. This translates with very very low noise floor and better clock accuracy
  •  Film capacitors on the output stage to reduce distortion, coupled with a super-capacitor to enhance bass representation
  •  2 High quality ultra low noise NDK Crystals, for clock generation

This is why the BOSS sounds so good:

  • Bass is punchy and present but yet very controlled. This is the best bass I’ve heard from any I2S DAC. That does not mean this DAC has a “dark” sound signature since it delivers a balanced reproduction.
  • Dead silent. There is no noise whatsoever, therefore dynamics and detail are really standing out. The instrumental separation and level of detail is one of the best I’ve ever heard.
  • Acoustic guitars and bass guitars are just fantastic with the BOSS
  • Thanks to the ultra-accurate clocks in Master mode this  DAC delivers an engaging musical representation (excellent PraT)

On Salve is BOSS V1.2 with improved features:

You can read my full review

 

 

UPDATE: The new BOSS has a typeC USB connector that can be used to feed power.
See below the J25 jumper used to control the powering patterns and instructions.

 

JUMPER ON:
1> Feed power ONLY to the BOSS >> it will feed the RPI
2> feed power to the ONLY RPI >> it will feed the BOSS
JUMPER OFF:
Feed power to the BOSS and the RPI individually.

How Allo describes it:

Our BOSS DAC is unique, because of the way we have implemented the design. First we separate the power on 3 channels and filter it: one for the digital side, the second for analog and third for the clocks themselves. Then we take the filtered power and use a second filter (LDOs) to further quiet the noise. Note that we use some of the best LDOs on the market (LT3042 from Linear). In addition, we use Japanese oscillators from NDK for a very low jitter clock – almost as good as famous Crystek.

Finally, on the analog stage we are using a film capacitor (not ceramic) for a quiet DC to feed the TI IC (ceramic exhibit some piezo distortion, not what you want in analog stage). Not happy with this, we have added a supercapacitor for an extra kick when analog stage is asking (like deep bass).

 

Features

  • Dedicated 384 kHz/32bit high-quality DAC PCM5122 for best sound quality
  • Audio output connectors: 2 x RCA (Left & Right ) & Allo Volt Amp header
  • HAT size
  • DAC SNR is 112dB
  • DAC THD+N @ -1dBFS are –87dB
  • Full Scale Output of DAC is 2.1Vrms
  • Dynamic Range of DAC is 112dB
  • Sampling Frequency ranges from 8 kHz to 384 kHz
  • Ultra-low-noise voltage regulators & LPF for optimal audio performance
  • Noise level: 66.27uVrms
  • Integrated EEPROM for automatic configuration (with write-protection)
  • Automatically switching frequencies according to the input I2S signals
  • Dual low jitter NDK crystal oscillators for Master Clock generation
  • With 45.1584/49.1520 MHz Ultra Low Phase Noise Oscillators

 

Looking for a case? Take a look at the Allo Customizable acrylic Case

 

Technical specs

 

Operating Temperature 0C to 70C
Board Size LWH = 67.4mm * 65mm * 22.2mm (NOT HAT COMPLIANT)
Board Weight 28g

IMPORTANT: SHIPPING OF BOSS DAC

 

IMPORTANT NOTICE FOR EUROPEAN CUSTOMERS

Since we received some complaints for custom fees, Allo has decided to offer shipping from Europe as well. If you select “Shipping from Europe” all custom fees will be included in the order, and therefore prepaid by Allo.
You can still order with “Shipping from India”, but VAT and custom fees may apply and been added when delivered.

IMPORTANT NOTICE FOR ALL CUSTOMERS

This product is shipped from India. International customers are responsible for any VAT and/or customs fees. These are beyond our control and will be based on declared value which is the board cost plus any options.

 

Want to get a 5 to 20% discount on this item? It’s super easy! After your purchase, just write a review and let us know!
More details here.

Additional Information

Weight 0.105 kg
Dimensions 0.674 x 0.65 x 0.222 cm
Shipping from

Europe, India

Standoffs

No, Yes

Share your thoughts!

5 out of 5 stars

1 review

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What others are saying

  1. Giovanni

    Question

    Hi … is it compatible with the new Rapsberry PI3 Model B+? Many thanks.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

    • voladmin

      admin

      Not tested personally yet, but it should be compatible

      (0) (0)

      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

    • lukaszad

      working fine.

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      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  2. Richard

    5 out of 5 Boss sound review

    Installed the Boss on top of Allo isolator. Isolater is feeded with lineair 7.5 Vdc supply which internally feeds the Boss with 5Vdc. The sound is very good compared with my other experimented DAC’s . It’s open, detailed and spacious . I estimate you have to spend around €1000 to find a better solution.

    (0) (0)

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  3. Jack

    Question

    What is in the box ? Allo Boss card and ? any spacers, screws ?

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  4. Ian Mitchell

    Question

    Boss DAC or Kali+piano bundle – which gives best sound.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

    • voladmin

      admin

      Depends on your tastes. BOSS is more musical, Kali + Piano more neutral.

      (0) (0)

      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  5. Alicia

    Question

    (verified owner)

    Can it connect and perform well with Raspberry Pi 3 model B?
    If it can, I would like to purchase…

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

    • voladmin

      admin

      Yes, it has been designed for the Raspberry PI 3, and its the most musical DAC there is, to me this is just a great DAC at a great price, you won’t regret it..

      (0) (0)

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