The Pro iDSD Signature is ifi's new reference-class flagship.
The Pro iDSD Signature is iFi's new flagship reference class DAC and then some! The Signature edition builds on the strengths of the original, multi-award winning Pro iDSD. It continues to cater for those who love good music delivered at the highest quality. Use the Pro iDSD Signature as a standalone unit, a DAC/preamp, a network streamer and a headphone amplifier.
The Signature takes the original Pro iDSD and pushes it even further towards perfection. The Pro iDSD Signature has:
The Pro iDSD Signature uses a quad-stack DAC – 4 x DACs in an interleaved configuration – to deliver exceptional resolution. The powerful XMOS XU216 X-Core 200 series chipset processes incoming digital data and enables the Pro iDSD Signature to provide state of the art audio support – from MP3, 32-bit/768kHz PCM, DSD512, 2xDXD and full MQA decoding. Thanks to the Crysopeia FPGA Digital Engine the Pro iDSD Signature brings studio grade DSD remastering to a wider audience. It can upconvert PCM and DSD files to DSD512 and DSD1024. And all controlled from an app in the palm of your hand.
The Pro iDSD Signature, like its predecessor, takes sonic tailoring to the extreme. Listen to the your music to in solid-state, tube or tube+ modes, your choice, all at the flick of a switch. iFi's Crysopeia FPGA Digital Engine strikes again as it enables the Pro iDSD Signature to offer several options when it comes to digital filtering. The GTO filter adds gravitas and a new dimension, and while the Bit Perfect, Bit Perfect+, Apodising and Transient Aligned filters give you even more choices to tweak the sound. The discrete, fully balanced Class A amplifier stage offers adjustable gain.
And with a variety of headphone outputs – Single-Ended 6.3mm, S-Balanced 3.5mm and Balanced 4.4mm – the only choice is your choice.
The Pro iDSD Signature ships with iFi's flagship iPower Elite. Coupled with the re-crafted power supply board which offers up to 300x lower noise, the music is buttery smooth. Within and without – iFi left no stone unturned in iFi's quest for the cleanest, purest, power for the Pro iDSD Signature (same for Pro iCAN Signature too!)
The Pro iDSD Signature has a ‘quad stack’ of Bit-Perfect DSD and DXD DACs by Burr-Brown. The ‘interleaved’ configuration means up to 8 pairs of differential signals can be used and mixed, equal to 4 pairs of signals per channel.
The Pro iDSD Signature employs the new XMOS XU216 X-Core 200 Series 16-Core processor. All-digital processing is Bit-Perfect unless particular digital filters are explicitly selected.
Upsampling to DSD1024 has previously only been available to a select few. The Pro iDSD Signature makes it available to a wider audience. The DSD1024 remastering is handled by the Crysopeia® FPGA and this is where FPGA excels.
Data is sent to the Memory Buffer from all inputs. Here it is de-jittered to eliminate any transmission of source jitter to the DAC output. The data from the Memory Buffer is further re-clocked by the low-jitter Global Master Timing® clock, which also drives the X-Core 200 and FPGA.
With LINKPLAY™ WiFi/network playback, built-in Spotify and Tidal, and wide protocol support for 32-Bit/192kHz and DSD64, the Pro iDSD Signature can be also used without a computer to stream audio directly.
Galvanic isolation is the ‘holy grail’ of computer audio. All inputs are galvanically-isolated (including USB). The USB input section has its own separate power management system with multiple regulators and filtering operating from the galvanically-isolated voltage generated to power this section.
Unlike other amplifiers that have the same circuit and just switch in/out the tube section, the original Pro iDSD and now the Pro iDSD Signature are among the very first to have two individual input circuits – one tube (General Electric 5670 tubes!) and one solid-state. This results in the ‘best sonics of both worlds’.
The amplifier audio circuit is fully discrete, fully-balanced with either tube or J-FET input switchable, bipolar second stage and MOSFET-buffered bipolar Class A Power stage.
The amplifier audio circuit is fully discrete, fully-balanced with either tube or J-FET input switchable, bipolar second stage and MOSFET-buffered bipolar Class A Power stage. iFi gave the Pro iDSD Signature an extra Tube+ setting. This reduces overall loop-gain and negative feedback to the minimum and presents a different sonic perspective between the tube’s natural harmonics and transient performance.
The Pro iDSD Signature is packed full of premium components – a Japan Alps rotary volume potentiometer, audio-grade ELNA Silmic capacitors and a bank of Elna Dynacaps ‘super capacitors’.
MQA (Master Quality Authenticated) MQA is an award-winning British technology that delivers the sound of the original master recording. The master MQA file is fully authenticated and is small enough to stream or download. The Pro iDSD Signature adopts MQA technology to receive and decode MQA audio and provide master-level sound.
|PCM 768kHz / DSD 49.152MHz (DSD 1024) / MQA 352.8KHz/DXD (2xDXD)
|USB / AES3 (XLR) / S/PDIF (coaxial/optical combo) BNC / Ethernet / Wi-Fi / Micro SD
|Bit Perfect / Bit Perfect+ / Gibbs Transient Optimised / Apodising / Transient Aligned
|User-selectable: 0dB, 9dB and 18dB
|(solid-state, PCM, -60dBFS)
|(16, balanced/single-ended): >4,200mW /1>1,575mW
|(600, balanced/single-ended): >11.7V / >5.9V
|Input voltage (Pro iDSD)
|DC 9V/6.7A – 18V/3.35A
|Input voltage (iPower Elite)
|AC 85 – 265V, 50/60Hz
|< 22W idle, 50W max
|213 x 220x 63 mm
|8.4" x 8.7" x 2.5"