ifi Pro iDSD Manuel utilisateur
User Manual
Pro iDSD
1
Thank you for purchasing this Pro series iDSD. The Pro iDSD is a 'state of the art' reference digital to
analog converter. lt is able to excel in many scenarios - as a wireless hi-res network player or the central
DAC in an expensive high-end home system, to quote just two examples. The on-board balanced
headphone section means high-end headphones can also be directly connected to it.
Features:
1. Quad-Core Burr Brown MultiBit/DSD hybrid DAC supporting DSD1024 and PCM768kHz
2. Studio grade DSD1024 remastering (Crysopeia FPGA Digital Engine)
3. Wireless DLNA/Airplay™/Ethernet Hi-Res Playback
4. User-selectable analogue stage: Tube or Solid-State
5. Master Quality Authenticated (MQA) playback
6. Global Master Timing femto grade clock system with external clock input options
7. Five lters: Bit-Perfect/Bit-Perfect+/Gibbs Transient Optimised/Apodising/Transient Aligned
8. Fully discrete passive LC analogue ltering
9. Zero Jitter Memory Buffer and Galvanic Isolation for all inputs
10. Discrete headphone/line amplier
11. Balanced inputs and outputs
12. Galvanic isolated ultra-quite power supply with super capacitors
Pr o
iDSD
Pr o
Input
/
90 18
Gain(dB)
+SE BAL
Filter
DSD 1024
Remaster ing
WPS
7.
1.
Headphone gain selection: 0dB/9dB/18dB
Headphone 6.3mm socket
Single-Ended 3.5mm headphone socket
LED indicator
Power
Input selector (incl. Brightness/Polarity)
Filter selector (incl. DSD Remastering/WPS)
Output mode: Solid-State/Tube/Tube+
2
P.8
1
23 5
6
8
11
2.
3.
4.
5.
P.4
8.
9.
P.4
P.4
P.5-6
P.7
P.8
P.8
12
9
4
7 10
OLED display
6.
Balanced 2.5mm headphone socket
10.
Analogue volume control (Line and
11.
IR remote control sensor
12.
Headphone outputs)
P.8
P.8
P.9
P.9
Techn ology l icens ed from A MR-A udio, U K
Ass emble d in Chin a
COAXIAL
OPTICAL Digital Inputs
RL
R
L
DC 15V/4A
XLR BNC
Sync In (USB)
Output Mode Sync Out
Outputs
Stand
Alone
DARS
Sync
Mode
DC Loop -Out
Pr o
Host Device
Pro ( Var)
Pro (Fixed )
HiFi ( Var)
HiFi (Fixe d)
3
XLR Balanced signal outputs
Single-Ended signal outputs
Output selector:
13
13.
14.
15.
P.9
P.9
P.9
P.12
P.12
14
15
16
17
18
19
20
21
22
23
26 27
24 25
Ethernet
Host USB
Device USB
16.
17.
18.
XLR Digital Input
19.
20.
21.
BNC Digital Input
Clock Sync mode:
Clock Sync output
23.
24.
25.
Coaxial/Optical Digital Input
Micro SDHC
22.
26.
27.
DC loop out supply
DC power supply connection
P.10
P.10
P.11
Analogue Outputs
Digital Inputs
Clock
P.10
P.10
P.10
P.11
P.11
P.12
P.12
(13 - 15)
(16 - 23)
(24 - 25)
Variable/Pro Fixed/Pro Variable Wi-Fi antenna
HiFi Fixed/HiFi
Atomic/DARS/1OMHz/Standalone
4
1. LED
Green: Warming Up
White: Solid-State Mode
Orange: Tube Mode
Red: Protection Mode
2. Standby/Power
3. Input selector
Use the selector to ’cycle’ through the following input options:
Also available via the input selector are:
- WiFi/Ethernet/Hard Disk/Micro SDHC
- Device USB (connect to a computer)
- Coaxial/Optical Digital Input
- XLR Digital Input
- BNC Digital Input
- Brightness (press to adjust)
- Polarity (hold to adjust)
4. Digital lter selection
The Pro iDSD offers the following three choices of digital processing:
i) Direct – Bit-Perfect
Both PCM and DSD signals are not processed in any way.
For PCM this is effectively what is sometimes called "non-oversampling" or "zero-oversampling". For
DSD it means the le is retained in the original DSD format and directly converted to analogue without
any digital processing.
ii) PCM - Upsampling
In this case PCM is up-converted to 16 x PCM (705.6/768kHz) using a choice of digital lters.
The following ve digital lters are available:
No digital ltering is applied, one tap'Bit-Perfect'
No digital ltering is applied, one tap, SINC roll-off is corrected'Bit-Perfect+'
Minimum ltering, no pre-ringing, minimum post ringing, 32 taps'Gibbs Transient Optimised'
Modest ltering, no pre-ringing, modest post ringing, 128 taps'Apodising'
Max ltering, max pre-ringing, maximum post-ringing, 16,384 taps'Transient Aligned'
The digital lter selections can be made 'on the y' to suit the listener's preferences.
5
Each lter effects a different time-domain and frequency-domain performance.
DSD remains completely unprocessed.
iii) DSD - Remastering
In this case incoming audio (except DSD512) is converted to either DSD512 or DSD1024 as selected,
using the lter selected (including Bit-Perfect, meaning no digital ltering is applied).
All these digital processing options apply to ALL sources, including the network audio bridge and AES-
EBU & S/PDIF inputs.
Inputs other than USB are currently limited to maximum sample rates of 192kHz PCM and DSD64 via DoP.
Please try all the different options to see which you enjoy the most.
Full Galvanic Isolation
All inputs are galvanically-isolated (including USB). The USB input is self-powered and does not draw
power from the USB bus. Therefore, the USB section is quite impervious to aftermarket add-ons or
tuning accessories.
WPS
For ease of use, simultaneously use the WPS button on the Pro iDSD and the router so that they can
both complete the handshake to pair up.
6
5. Output section mode: Solid-State / Tube / Tube+
The Pro iDSD (just like the Pro iCAN) is a one-of-a-kind product that is able to switch between:
'Solid-State' - a purely solid-state J-FET based circuit of fully-discrete Class A topology.
'Tube' - the J-FET circuitry is switched to an all-valve Class A section based on 2 x GE5670.
'Tube+' reduces available negative feedback to a minimum. As a result, a greater amount of the
tubes natural harmonic distortion is produced (even order harmonics dominate).
When switching, there is a momentary pause as the circuit switches over.
The audio circuit is a development of iFi's revolutionary 'TubeState' design. It is fully-discrete, fully-
balanced with either tube or J-FET input switchable, bipolar second stage and mosfet-buffered bipolar
Class A power stage (with Class AB for low impedance headphones and very high levels). The circuit is
fully DC coupled.
Please note that, due to the wear on the cathode of tubes after an extended period of time in solid-
state mode, the tube heater element will automatically power down and turn off the tubes. If the tube
heater is shut off when switching to tubes, they will need to warm-up again (as if the whole Pro iDSD
itself was powered up from cold). Music will continue to play via the solid-state section until the tubes
are ready.
This ensures maximum longevity for the NOS General Electric 5670 tubes.
+
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6. OLED display
7. Headphone 3.5mm Single-Ended socket
3.5mm with TRRS iFi S-Balanced.
8. Headphone gain selection: 0dB/9dB/18dB
Always start from 0dB and then increase the gain level to attain an enjoyable and comfortable level of
volume from the headphones.
Warning: at the outset do not use excessive gain, otherwise damage to hearing or connected headphones
may ensue. AMR/iFi audio is not responsible for any damage/injury from misuse.
9. Headphone 6.3mm socket
10. Balanced 2.5mm headphone socket
2.5mm TRRS Balanced .headphones
if possible, always use balanced headphones to take full advantage of the true balanced nature Tip:
of the Pro iDSD circuitry.
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11. Analogue Volume Control
At normal listening levels, the volume control should be around the 12 o'clock position. Increase the
gain level to enjoy a higher listening level.
12. Infrared Remote Receiver
Ÿ
Ÿ Window for infrared remote receiver signal.
Rear of Pro iDSD
Analogue Outputs
13. XLR Balanced signal outputs
Balanced signal output to an amplier.
14. Single-Ended signal outputs
Single-Ended signal output to an amplier.
15. Output selector: HiFi Fixed/HiFi Variable/Pro Fixed/Pro Variable
It is possible to set the signal output to different levels for home or studio use. Industry standard
signal output levels apply; balanced output is ~4.6V (HiFi Fixed mode) and ~11.2V (Pro Fixed mode).
Variable is adjusted via the front volume control. With the volume control at maximum the same
signal levels listed above are achieved.
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