ATH-DN1000USB Audio Technica DNote Digital USB Headphone - diyAudio
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Old 21st November 2014, 05:36 PM   #1
diyAudio Member
Join Date: Nov 2006
Default ATH-DN1000USB Audio Technica DNote Digital USB Headphone

Interesting headphone, digital signal only to voice coil / music suddenly appears on Diaphragm.

Audio-Technica ATH-DN1000USB Desktop Headphones | HYPEBEAST

Trigence Semiconductor

it works as..
(1) PCM up to 192/24 oversampled to 11.2896MHz 24bit
(2) Delta Sigma conversion / noise shaping, reduce from 24bit to 4 bit (-4,-3,-2,-1,0,1,2,3,4) 9 level. more than DSD quality
(3) drive 4 voice coils in headphone, each coil is driven by -1/0/1 signal
(4) signal - coil combinations are always shuffled to averaging coil resistance and power.
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Old 24th November 2014, 06:22 PM   #2
diyAudio Member
Join Date: Nov 2006
Default "ALL Digital" DNote system

Not so many information about DNote.
d04.jpg: DNote LSI has FET switch inside, 4 push-pull BTL, which drives 4 coil speaker. Digital signal is converted to 3 to 8 bit 12MHz , then shuffled / assigned to 4 coils.

EEOL_2014JUN04_INT_EMS_NP_01.jpg: only one analog component is speaker cone. even coils do not concern about Analog signal

ns_201212_Trigence_Fig01: DNote LSI function blocks
ns_201212_Trigence_Fig02: Dnote evaluation board, it has 16 resistors at output = 4 coil BTL stereo
Attached Images
File Type: jpg d04.jpg (165.0 KB, 38 views)
File Type: jpg EEOL_2014JUN04_INT_EMS_NP_01.jpg (45.6 KB, 37 views)
File Type: jpg ns_201212_Trigence_Fig01.jpg (35.9 KB, 36 views)
File Type: jpg ns_201212_Trigence_Fig02.jpg (58.4 KB, 39 views)
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Old 25th February 2015, 06:37 AM   #3
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Join Date: May 2004
Location: Westland
Blog Entries: 1
Just reacting fast:
I see the coil has multiple windings.

Pondering (its early in the morning ) you don't need a four coil winding, or sixteen for that part: if you use a very high output impedance (current drive, mossiest).
Having four coils in parallel would imply that anyway otherwise the coils electronics would would interfere (counter EMC) with each other anyway.
DAC TDA1541 S1; Kondo post-I/V filter; MC30-Super --> two stage RIAA; Pre: Kaneda ; F5 ; 300B PP ; ESL 57
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