Να βάλω ακόμα ένα μηχάνημα από μία εταιρία που φτιάχνει ακομα και pci κάρτες για pci usb audio interfaces.
Είναι η Sotm για την οποία έχουμε ξαναγράψει στο φόρουμ.
Εδώ το ακριβό Sotm SDP 1000 PCM DSD.
Στην σελίδα του κατασκευαστή αναφέρονται οι δυνατότητες του DAC σε δειγματοληψίες PCM και DSD. Σε review του 6moons αναφέρεται η χρήση του Asahi Kashei AK4399 από σχόλια του κατασκευαστή σχετικά με το review αλλά και με προβλήματα που αφορούν την αναπαραγωγή αρχείων DSD 128 που έχει το DAC. Παρόλα αυτά πωλείται στην τιμή των 2900$.....
Λειτουργεί με μπαταρία και διατίθεται εξτρά εξωτερικό τροφοδοτικό στα 1000-1200$ ανάλογα την έκδοση.
http://www.sotm.sonore.us/SOtM2.html#2
6moons
"The sDP-1000 uses digitally actuated analog volume to avoid A/D conversion for its analog inputs and compression of dynamic range at low volumes. Our chosen converter chip is the AK4399 from the Japanese Asagi Kasei Microdevices company. This chip accepts a direct DSD input via the DoP standard over USB. The DSD signal path bypasses the chip's interpolator so there are no modifications to the DSD stream from it. It's possible that the chip's digital volume would modify the DSD signal but we cannot find any technical information about this. Never mind, with its on-chip digital volume bypassed at 0dB which is how we've fixed the sDP-1000, both DSD and PCM data paths remain perfectly pure.
"And we're still investigating the possibility of adding DSD128. The issue could be inherent limitations of the AK4399. It's presently unclear whether it'll support 2 x DSD or not. The output impedance is 47Ω on both RCA and XLR. The latter's slew rate is set by its buffer chip to 50v/μs. For the unbalanced chip that becomes 11v/μs. Obviously those specs degrade a bit with the EMI filter of the output stage and a few other parts in the circuit. The current delivery of the balanced output is 85mA. That becomes 45mA for RCA. Max voltage swing is 6Vp-p relative to a 10KΩ input impedance."
http://www.6moons.com/audioreviews/sotm2/1.html
FEATURES
USB input
USB 2.0 high speed
USB audio class 2.0
44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz sampling rate
Max 32bit PCM & 1 bit DSD
Sampling rate auto detect and display
Asynchronous isochronous mode operation
Windows OS, Mac OS-X , Linux Support
Ultra Low Jitter clock with active noise cancellation
AES/EBU, BNC, Coaxial, Optical input
AES, S/PDIF data format compatible
32KHz, 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz sampling rate
Max 24bit PCM audio data
Auto enable de-Emphasis filter for 32KHz, 44.1KHz, 48KHz sampling rate
Sampling rate converter
Select 48KHz, 96KHz,192KHz/32Bit
Analog audio input
Stereo balanced input x 1 and unbalanced input x2
Input signal cross talk reduction circuit
DAC output
Full balance buffer circuit
Passive L-C low pass filter
Wide range frequency response : 10Hz~50KHz
SNR : -110dB >
THD+N : -100dB >
Preamp
+10dB ~ -60dB, 0.5 dB step
Stereo balanced output x 1 and unbalanced output x1
Power circuit
Battery operated
Dual battery pack and automatic charger
Ultra low noise regulator circuit for all digital and analog circuit
Dimension
360 mm wide x 240 mm deep x 68mm high
Εδώ και το φθηνότερο και μικρότερο μοντέλο της εταιρίας.
SOtM sHP-100 Headphone AMP
http://www.sotm.sonore.us/SOtM1.html#4
SPECIFICATIONS
Interface
Indicate lamp : USB, Coaxial, Optical, Analog
Volume control knob
Input select & mute switch(share with volume control knob)
0.5sec < press : input change
0.5sec > press : mute on/off
USB input
USB specification 2.0 or higher
USB audio class 2.0
Native ASIO support
Linux, PC and Mac support
Optical, Coaxial input
Max bit-depth : 24bit
PCM sampling rate : 32KHz, 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz
DSD sampling rate : DSD64, DSD128
Coaxial input impedance: 75Ω
Analog input
Max input voltage : 2 Vrms
Input impedance : > 10kΩ
Frequency range : 20~20KHz @ ±0.1dB
Headphone output
Low impedance, high impedance headphone selectable switch
Output power : TBD mW@ ±5%
Frequency range : 20~20KHz @ ±0.1dB
THD : < 0.003% @ 1KHz, 0dB
Analog line output
Variable level output, fixed level output selectable switch
Fixed level output voltage : TBD Vrms ±5%
Output impedance : 47Ω ±5% (Fixed level)
Frequency range : 20~20KHz @ ±0.1dB
THD : < 0.003% @ 1KHz, 0dB
Power requirement
External power : 7.0 ~ 9.0Vdc, 1.5A
USB power : 5.0Vdc, 0.5A
Dimension
Width : 105 mm
Height : 53 mm
Depth : 150 mm
Except for knob and connectors.
Weight : 1 Kg >
