Transcend T.sonic 870 + Sony ex310Lp      

90s Vega m420s/Vega st23 Vega p410s/TDS 5m Aiwa rx108/Philips hp840

Kimber Kable with Paillics connectors. Double amping is very interesting thing. It mixes character of sound. SMSL has good "Lows" and dynamic, but not large soundstage. A970 gives more wider scene and "air" to the sound. And there is no "horrible distortion" or big hisss, as some think.

SMSL w3 and Kimber Kable yes, tds 5m

SMSL sAp-4s Line5 A970 Teclast x30se Sony ex310 Sennheiser mx375 west Elektronika TDS-5M

Its Kimber Kable

Teclast x30se, smsl sap-4s, sony ex310

You use line-out on source? What if connect source via headphone out? It will be triple-amping in fact. How change SQ in that way? AK100 i think have not bad amplifier inside.

Its absolutely confidencial information, it is a test unit. I can show only a photo. XD

Real Привет-Fi rig

What volume balance using on double amping? What level on DAP, on "pre amp" and on second amp?

Lenovo A800 Smart Music Sennheiser mx375 SMSL sap-4s

Player-SAMSUNG MCD-SM60 Headphones-Elektronica TDS-5M

Dap - Texet T11 (16gb microSD) Amp - SMSL sAp-4s earPhones - Fischer Audio FA990 (Neutrik ntp3rc-b mini-jack) headPhones - Sony MDR-V150