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Hangzhou, PRC

Forum Post Count:


Join Date:


Last Online:

on 7/2/15

About Me:

Disruptive innovator in digital audio using ARM Cortex M-series and cheapo multibit DACs.

Interests (Hobbies, favorite activities, etc.):

Music, philosophy, engineering, gadgets, teas, curries, gals.

What I do for a living:

Been working most of my time on multibit DAC designs. Rest of time teaching English one-to-one.

Headphone Inventory

Shure E3, E5, Sony MDR-CD3000, Sennheiser HD-420

Headphone Amp Inventory

No separate head-amps, all mine are integrated with multibit DACs. Currently I'm using AD815s but in the past have gone through AD8017 and AD8016.

Source Inventory

SD card players (QA550 and Taobao-sourced one using STM32F407) feeding homemade multibit DACs (TDA1545A, TDA1387) with massive cap arrays on the supplies and LC anti-image filters. I use old DVD players for S/PDIF sources.

Cable Inventory

Not a believer in cables hence none to speak of. Doesn't mean I don't believe in cable sound though - just that it should be taken out of the equation by other means than by rolling cables.

Power-Related Components

Own designed wideband mains filters using air-cored steel inductors.

Other Audio Equipment

M-Audio 24/96, Asus DX & Essence ST, Creative X-Fi extreme music, Fayou active XPE, 08 and ArtMasters, B&W CM1s, Hivi D1010s and D1080 MkIIs, 2 Xindak integrated amps, extensive mods to PSUs and grounding. Heavily modified 3Nod desktop monitors. Paiyon passive bookshelf monitors on stands

Audio-Related Tweaks

Mains balancing transformers (1kVA).

Music Preferences

Classical, acoustic rock, world, new age, jazz.

Interests (non-headphone)

Philosophy, piano, psychology. drinking tea, Asian foods and of course, pizza.

Gear-Fi (Favorite Non-Audio Gear & Gadgets)

Kawai GS-30 grand piano, Schimmel upright.

Sapientiam's Recent Activity

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Sapientiam posted in this thread in Dedicated Source Components 6/27/15 at 4:29am | 457 replies | 34549 views
Testing claims about the sound of different DACs
Sapientiam posted in this thread in Sound Science 6/22/15 at 10:22pm | 299 replies | 6537 views
Gustard Amplifiers and DACs
Sapientiam posted in this thread in Headphone Amps (full-size) 6/18/15 at 3:57am | 523 replies | 43887 views
Schiit Yggdrasil Impressions thread
Sapientiam posted in this thread in High-end Audio Forum 5/19/15 at 10:51pm | 1060 replies | 122150 views
Tiny DAC, Big Sound, Evolved – Stoner Acoustics UD100 / UD110 / UD120
Sapientiam posted in this thread in Dedicated Source Components 4/27/15 at 9:12pm | 1121 replies | 187803 views
Do I need a DAC that can handle more than 16bit music files?
Sapientiam posted in this thread in Dedicated Source Components 4/25/15 at 5:01pm | 16 replies | 410 views
First DAC please Help! (Sub 80$) - Can be DIY
Sapientiam posted in this thread in Dedicated Source Components 4/21/15 at 6:30pm | 33 replies | 767 views
Mini Dac TDA1543 X 4 NOS
Sapientiam posted in this thread in Dedicated Source Components 4/12/15 at 10:14pm | 953 replies | 231639 views
What kind of DACs and amps are used in monitors and TVs?
Sapientiam posted in this thread in Dedicated Source Components 3/25/15 at 7:17pm | 6 replies | 218 views


Sapientiam’s Photos

13 photos
Latest upload: Apr 25, 2014
4 photos
Latest upload: Apr 27, 2014

Sapientiam’s Embedded Photos

Sapientiam's photos in Ranking of 17 DACs and DAC Configurations
2 photos
Latest upload: Mar 15, 2015
Sapientiam's photos in December 2013 Mid-Level DAC Comparison
1 photo
Latest upload: Jan 9, 2014

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