Recommended Components

A+:

Antipodes K50: $19,000
The made-in-New Zealand K50 works with Roon as both server and player, Roon as a server with Squeezelite or HQ Player as the player, or Squeeze as a server and Squeezelite as the player. It offers Ethernet, USB, I²S, AES3, and S/PDIF outputs, though the manufacturer doesn't recommend using USB. JVS found that the Squeeze server and Squeezelite apps were not as user-friendly as Roon, but using them to transmit the audio data via single AES3 to the dCS Rossini DAC "delivered the most transparent, detailed, color-saturated, vivid, midrange- and bass-rich sound of all options available to me." He also noted that playing files stored on the K50's optional SSD (sizes up to 24TB are available) sounded "a mite better—the extra transparency was noticeable" than playing the same files sourced from his NAS, or from Tidal and Qobuz. "Class A+ all the way," he concluded. (Vol.44 No.10 WWW)

Antipodes Oladra server/streamer: $29,000
This expensive server/streamer/reclocker from New Zealand is designed for precise clocking, low noise, and high bandwidth. The Oladra can serve as a Roon Core and can be operated with Roon or with another player app like HQPlayer, MPD with MinimServer, or with "Squeeze," Antipodes' own customized version of the Logitech Media Server. The Oladra can access audio files stored remotely on a NAS and stream music from Qobuz, Tidal, and other streaming services. Users can also add up to 24TB of internal storage—Antipodes recommends Samsung PM893 cards—by sliding up to three cards into the storage slots on the rear panel. In order of decreasing sound quality (according to Antipodes), data outputs are I²S on HDMI or RJ45, AES3, S/PDIF (BNC and RCA), and USB 2. There is also "Direct Stream Ethernet," when the data emerges direct from the Server engine, out to a streaming DAC, bypassing the Player and Reclocker. Using a dCS Vivaldi Apex DAC (which doesn't have an I²S input), JVS found that music sounded best when he used Squeeze as both server and player and AES3 or S/PDIF (BNC) for the Oladra's output. Switching outputs from AES3 to USB, which bypasses the Oladra's reclocker, he noted that the sound wasn't quite as warm, color-saturated, or transparent. Overall, Antipodes Audio's top-line Oladra "is among the finest sounding music servers I've had in my system," he concluded. On Paul Miller's testbench, the Oladra's output significantly reduced jitter compared with his desktop PC driving USB-connected AudioQuest DragonFly and iFi Audio NEO iDSD DACs, but offered little improvement with Mytek Brooklyn and dCS Vivaldi One Apex DACs. (Vol.46 No.7 WWW)

Burmester Musiccenter 151 MK2: $27,500
The 151 MK2 is a music server/network streamer with an internal DAC, a 2TB internal SSD, and a volume control. Operations are controlled with an iPad/iPhone app via Wi-Fi. There are analog inputs, and files can be played from USB sticks and external drives, or NAS drives; internet radio and music can be streamed from Tidal, Qobuz, and Idagio via Ethernet or Wi-Fi; and a CD drive allows silver discs both to be played and to be ripped to the internal SSD. The Musiccenter's DAC automatically upsamples/resamples lower-rez music to 24/96 or 24/192 and DSD up to DSD256 and DXD to 24/192 or 24/96. JVS enjoyed his time with the Burmester, concluding that "Music lovers who retain their love for silver discs will find them sounding even better when ripped to the unit's 2TB SSD, and those accustomed to file playback and streaming will find the Musiccenter's multifunction, multipurpose excellence a one-stop avenue to bliss. Through the 151 MK2 Musiccenter, music sings supreme." JA found that the CD transport offered superb error correction/concealment, which he felt was appropriate for ripping CDs. He concluded that the Burmester 151's performance on the test bench indicated excellent audio engineering in both the digital and analog domains. "It gets a clean bill of health from this measurer." (Vol.45 No.5 WWW)

CH Precision D1.5 SACD/CD player/transport: from $41,000; As reviewed $46,000
Base price is for the SACD/CD transport, which has TosLink, AES3, and CH's proprietary high-rez CH Link HD; two MQA-capable mono DAC cards add $5000. Control is via two coaxial knobs on the front panel or with an app for Android devices. When it's used as a player, all data are upsampled to DXD (24/384), and the analog output is processed with a reconstruction filter optimized for the time domain. Playing CDs, JCA reported that low frequencies had "seismic weight" and that stereo imaging precision and soundstage depth were excellent. He also noticed how good the D1.5 sounded at low volume. With the MQA-CD of Patricia Barber's Clique, JCA wrote that Barber's voice had a lovely, creamy texture, though as the music got louder, he detected some congestion. In level-matched comparisons of the SACD version of this album, he didn't hear as much creaminess on the vocals, though the presentation was not congested at high levels. JCA concluded that after several months with the D1.5 he never got bored; the music kept surprising him. In the test lab, JA found that with CD data this filter rolled-off frequencies above 15kHz because the review sample's firmware had selected an incorrect filter; JCA updated the firmware and reported on the behavior with the correct filter in the May 2022 issue. He wrote that with the new firmware, the transformation in the sound of the D1.5, when playing CDs, was qualitative. It "wasn't necessarily—wasn't immediately—a giant leap forward in absolute sonic quality. It was, rather, simply a major change in sonic character." Other than the frequency response with CDs now extending to –3dB at 20kHz, the primary measurable difference was the change from a relatively long, minimum-phase impulse response to an extremely short impulse response. (Vol.45 Nos.3 & 5 WWW)

dCS Rossini SACD Transport: $26,500
Unlike the earlier Rossini Player, which only played CDs, the Rossini Transport uses a new mechanism from Denon that plays both SACDs and CDs. The Transport outputs audio data on twin AES/EBU links, to allow it to send native DSD data and CD data upsampled to DXD, DSD, or double DSD (these both encrypted) to a dCS DAC. JA used the Transport with a Rossini DAC and was mightily impressed by what he heard. He consistently preferred the sound of SACDs played on the Transport compared with the same data sent to the Rossini DAC over his network, feeling that the low frequencies sounded more robust. "Once these words have been laid out on the pages of this issue," JA concluded, "I'll have to return [the Rossini Transport] to dCS. It breaks my heart." (Vol.42 No.5 WWW)

exaSound Delta Server Mark II: $2999 plus cost of internal storage
Powered by an Intel i9-9900, this passively cooled music server runs exaSound's custom Linux operating system and a Roon Core, these stored on an SSD. An optional second SSD can be used for file storage. KR found the Delta to be more powerful than either a Roon Nucleus+ or a Baetis X4i, better coping with demanding DSP operations with multichannel and DSD files. "The Delta Music Server is the most capable server I have used, but it is far from the most expensive," he concluded, adding that the Delta is, in his opinion, what a Roon server should be. (Vol.44 No.4 WWW)

Grimm MU1 music streamer: $12,500 plus cost of internal storage (ex VAT)
The MU1 is based on an Intel twin-core i3 processor running a Linux-based operating system. It incorporates a Roon Core and is fully integrated with the Roon Server app. It can be controlled by rotating and pressing a top-mounted, bronze-colored disc. (A high-precision digital volume control and other functions can be selected with this control.) While its Ethernet and USB ports can be used to send audio data from the Intel board to a DAC, the MU1 upsamples PCM data and downsamples DSD data sourced from its AES/EBU outputs, using what Grimm calls a "Pure Nyquist" decimation filter hosted in a Xilinx FPGA. (Measurement revealed that this is an ultra–fast-rolloff filter, reaching full stop-band attenuation at half the original PCM data's sample rate.) JA very much preferred the sound from the AES/EBU outputs, finding that the upsampling of CD-resolution data reduced congestion, added depth to the soundstage, and increased the separation among acoustic objects in that soundstage. JA recommended the MU1 highly as a streamer, writing that it can also operate as a network bridge with legacy D/A processors that don't have USB or Ethernet ports, and that it can be used as the sole source component with active speakers that have digital inputs. A 1TB SSD adds $225; 2TB SSD adds $430; 4TB SSD adds $805. An FM tuner function is promised. (Vol.44 No.3 WWW)

Innuos STATEMENT NG: $18,900 and up, depending on storage
JVS reviewed the original two-box Statement from Portuguese company Innuos in Vol.43 No.4. This server included a drive for ripping CDs and featured eight separate power supplies: three for each voltage of the motherboard; one for the CPU; one for the SSD storage device; one for the Ethernet Reclocker board; one for the USB Reclocker Board; and one for the USB clock. Comparing the Statement with a Nucleus+ using USB connections to his dCS Rossini D/A processor, JVS found that the Innuos server's treble seemed slightly rounded, the presentation "a touch warmer. ... The Statement warmed the piano and smoothed out the top in a manner that some would call analoglike or tubelike." JVS concluded that "In its flagship Statement music server, Innuos has created a transparent instrument that scores big in soundstage size and depth, dynamics, and bass reach." In a Follow-Up, JA found almost no measurable differences in a PS Audio DirectStream's analog output whether it received data from the Nucleus+ or Statement via USB or from the Nucleus+ via Ethernet. In a series of listening tests, JA found differences between the Innuos and Roon servers difficult to hear with many recordings but ultimately agreed with JVS that via USB connections, the Nucleus's low frequencies were outclassed by the Statement's. Not by much, I admit," he wrote, "but enough to matter; ... the bass line had a touch more drive with Statement sending data to the PS Audio." The Statement was replaced by the Statement NG, which featured the upgraded Next-Gen linear power supply and the latest InnuOS software. JVS wrote that the NG sounded superior both to the original Statement and to the current Roon Nucleus+. He also noted that the latest InnuOS Web app offered major advances over earlier versions. (Statement, Vol.43 Nos.4 & 5 WWW; Statement NG, Vol.46 No.11 WWW)

Jay's Audio CDT3 MK3: $4998
The massively constructed CDT3 MK3 CD transport—it weighs 50lb— uses Philips's top-of-the-line CD-Pro2LF drive. Although this was discontinued in 2013, Jay's says they have stockpiled a substantial inventory of these drives and is confident they have plenty on hand to cover potential future service issues. Digital outputs are AES3 (XLR), S/PDIF (BNC and RCA), and I²S on RJ45 and HDMI. (The latter follows the connection protocol established by PS Audio.) Using the I²S over HDMI output with a Denafrips Terminator II DAC, MT felt that the CDT3 offered a clear improvement in resolution resulting in a better defined and more spacious soundstage compared with his Audio Note transport. The Jay's transport features switchable 4× oversampling. MT found that this enhanced the presentation of the soundstage, as well as fleshing out the harmonic tonal colors of double bass and piano. "Jay's upsampler seems to offer a genuine improvement," he concluded, adding that the CDT3-MK3 is "a truly exceptional way to play your CD collection." In the test lab, JA found that the CDT3 offered excellent error correction and low transmitted jitter. Peculiarly, however, while the oversampled outputs featured accurate 16-bit data, the non-oversampled outputs were limited to 15-bit resolution, due to the presence of LSB-level random noise. (It turned out that was due to the upsampling chip dithering its output, even when set not to upsample.) In his own auditioning, JA found that the Jay's upsampled output worked well with the Mojo Mystique SE NOS DAC. (Vol.46 No.5 WWW)

MBL Noble Line N31: $18,500; optional Roon Ready module is $1480 ★
Designed to play "Red Book" CDs and, via its USB and other digital inputs, music files up to 24/192 and DSD64 (DoP), the Noble Line N31 is less a digital-audio Swiss Army knife than a luxuriantly attractive, 40lb monument to the idea of perfecting the playback of audiophilia's best-loved digital formats. Built around the ESS Sabre 9018 DAC, the N31 offers a full-color 5" TFT display–the MBL player recognizes CD text and displays title information–and features an SDcard slot for firmware updates, a choice of three playback filters, and a remote handset that lights up before the person reaching for it has even touched it. Listening to CDs and even a CD-R through the N13, JA was impressed by the "sheer tangibility" of the MBL's sound, noting that, with its Min filter engaged, the N31 "gracefully reproduced" one "overcooked" track, and that the differences among its three filters were "greater in degree than with other DACs." Through the MBL's USB inputs, even iPhones and iPads, their own volume controls disarmed by the MBL's USB input, offered "excellent" sound quality. JA originally raised an eyebrow at the lack of a network port and the fact that the player's filters can't be selected via the remote handset, but both of these issues have been addressed in 2020 production with the optional Roon Ready Input Module. As with USB, the networked MBL rendered music with an excellent sense of overall drive and low-frequency impact, JA found, with low-level recorded detail well-resolved. JA concluded his original review by saying that digital sound "doesn't get any better" than what he heard from the N31. He also noted that the MBL offered 21 bits of resolution–the current state of the art of digital audio. This prompted JA the measurer to agree with JA the listener: "Digital audio engineering doesn't get any better." Price is with factory-installed Roon Ready network module. Price without module is $15,400. (Vol.41 No.2, Vol.43 No.12 WWW)

Pink Faun 2.16x Ultra Streamer: $25,000 as reviewed, with S/PDIF and USB I/O cards
Storage for music files is optional with this expensive, dead-silent streamer from Holland, and it has no built-in DAC. As a streamer, though, it's an all-out effort. "Its huge size and weight and [custom] Lamborghini Orange front panel shout that out loud," KR wrote. The CPU on the motherboard is liquid-cooled by copper tubes coupling it to a large heatsink on one side of the chassis. The heatsink on the other side cools five large power transistors. Proprietary, sealed Oven Controlled Crystal (Xtal) Oscillators (OCXOs), available in standard or Ultra versions, are used for the system clock, the motherboard, and each of the I/O cards. The "headless" Pink Faun is controlled by the Roon app, which can run on a tablet or laptop. KR was impressed by this streamer's performance with both stereo and multichannel files, writing that it was sufficiently transparent to permit him to hear differences among DACs and reconstruction filters. "The Pink Faun 2.16x Streamer is, sonically, as perfect a stereo source component as I have used," he concluded. (Vol.43 No.12 WWW)

Roon Labs Nucleus+: $2559 without audio file storage ★
The first hardware product from software specialist Roon Labs, the Nucleus+ combines an Intel i7 processor/NUC board with 8GB of RAM and a 64GB SSD solid state drive, the latter hosting the Linux-based Roon Optimized Core Kit (ROCK) operating system and Roon server software. Also provided are a single gigabit Ethernet port, USB 3.0 ports for conversing with external drives and/or USB DACs, a multichannel-friendly HDMI port, a Thunderbolt 3 port, and an internal bay for an HDD or SSD drive. Use of the Nucleus+ requires a Roon subscription ($9.99/month, $699.99/lifetime). When JA tried the Nucleus+, he found he had "nothing specific to say about the sound other than that it was always excellent." KR described his efforts at pressing the Nucleus+ into service as a multichannel server. His results were encouraging, although DSP execution was a mixed bag, depending on sample rate, the operation desired, and the strain they put on processing power. Upsampling in particular "seemed to drain the tank." In a 2020 Follow-Up, JA found that the sonic differences between the Nucleus+ and the considerably more expensive Innuos Statement server were small. (Vol.41 No.8, Vol.42 No.3, Vol.43 Nos.4 & 5 WWW)

Totaldac d1-streamer-sublime music server: €9100
This French streamer/server offers a network input and digital outputs and functions as a Roon endpoint. It tops out at 24/192, and it passes DSD via DoP. AH used the d1-streamer sublime to audition Totaldac's d1-unity—see Digital Processors. When he replaced it with his usual combination of Sonore ultraRendu and Denafrips Iris digital-to-digital converter, the sound was possibly a hair more forceful but also audibly less refined and purposeful. "The meaning of the music was less obvious, and everything sounded just a bit more mechanical," he wrote. (Vol.46 No.12 WWW)

A:

Hegel Viking: $5000
This slot-loading player uses the well-regarded AKM4493SEQ DAC chip and doesn't have any digital inputs. It just plays CDs. It does, however, have a coaxial S/PDIF digital output, which JA found featured very low jitter. HR played CDs and was impressed by what he heard. "CDs exhibited more crystallized forms than similar recordings played back from Tidal at CD resolution. The Viking projected images with more-distinct outlines than Tidal's 16/44.1 tracks. Those more-distinct forms felt more relaxed and less edge-sharpened than similar recordings of the same program at higher sampling rates on Qobuz," he wrote. HR concluded that the Viking "presented every CD with enough verve, transparency, and natural detail to make each disc sound distinctly different, which shows that the player's sound was not swamping the disc's sound. This ability to disappear and put the character and vital energies of recordings up front made the Viking exciting to use, and that is my highest compliment." (Vol.46 No.12 WWW)

Melco N50 digital music library: $5499 incl. 3.84TB storage
The slim, Roon Ready N50 includes internal storage and has two Ethernet ports and four USB 3.0 ports, one of which is optimized for sending audio data to a USB-connected DAC. KR found that the front-panel controls and the small alphanumeric display worked fine for setup and basic music selection, but quickly realized that the Melco Music App running on an iPad—there's no Android support—was essential for selecting music and making the Melco enjoyable to use. Once the N50 was connected to KR's local network, the app's "Library" choices included every audio file on every device on his LAN. He summed up that the Melco "lets you engage with the music and does nothing to intrude on that engagement. That's its role, and it performs it well. Crucially, it does nothing to degrade sound quality. Especially when playing from its internal storage, the N50 is responsive." (Vol.45 No.6 WWW)

Mytek Brooklyn Bridge II Roon Core: $4995
The small Brooklyn Bridge II streaming D/A preamplifier offers digital and analog inputs, including an MC/MM phono input, balanced and single-ended analog and headphone outputs, and incorporates a Roon core. All its owner needs to add to create a complete system are some file storage, a power amplifier, and a pair of loudspeakers. TF found the touchscreen too small for easy use, instead controlling the BBII functions with the Roon app. (Roon identified the Brooklyn Bridge II as a full MQA decoder and renderer.) He found that the single-ended outputs picked up some hash from his Mesh Wi-Fi network, though JCA and JA didn't encounter any Wi-Fi–related problems in their own systems. In the test lab, JA noted that the Mytek runs very hot. The DAC circuit offers between 18 and 19 bits' worth of resolution, he found, and commented that the analog output stage coped well with punishing loads. He was less impressed with the phono input, finding that even in MM mode, the noisefloor suffered from supply-related spuriae, these presumably radiated from the power transformer packed into the small chassis. The levels of these spuriae were unacceptably high in MC mode, decided JA. TF was also bothered by the Mytek's phono input, finding that even in MM mode, "there was enough his and hum to be audible at the listening position, through all outputs: balanced, unbalanced, headphone." Hum aside, however, he wrote that LPs "sounded vivid, the tonal balance was right, there was plenty of headroom." Playing back files from his NAS drive TF wrote that "the BBII sounds damn good . . . Its character was uncolored and revealing . . . the BBII is a fine DAC, in the top tier of its price range." (Vol.46 No.9 WWW)

Rotel Diamond Series DT-6000 CD Transport/DAC: $2299.99
As well as playing CDs, the DT-6000 has three digital inputs (coaxial and optical, these accepting PCM data up to 24/192), and a Class 2.0 USB input that will accept PCM data up to 32/384, DSD data, and MQA data up to 24/384. However, despite being called a "Transport," the DT-6000 doesn't have a digital output. It uses the well-regarded ESS9028PRO DAC chip. HR wrote that with CD data his more expensive R-2R DACs "did not better the DT-6000's beat-keeping and boogie-stomping." Streaming well-recorded piano, the Rotel offered "clean, fast, well-sculpted authority," HR decided, and while he felt streaming was clearer, smoother, and more open than CD playback, contrasts weren't as sharp, the presentation less physical. "Music from CDs sounded denser and more fortified than music from Qobuz and Tidal," he concluded. (In the test lab, JA found that while jitter was nonexistent with CD playback, it was high in level with streaming audio via USB. He also noted that the Rotel's error correction playing CDs was superb.) Overall, HR described the DT-6000 as a "well-built, great-sounding, reasonably priced CD player." (Vol.46 Nos.2 & 3 WWW)

B:

Cyrus Audio CDi-XR:$3300
KM found that this diminutive, well-finished CD player from the UK offered greater weight and punch than the same music when streamed via a Denfrips Ares II D/A processor. However, on some recordings he wrote that "this manifested as tonal thickness and a loss of transparency. Streaming tended to excel at treble, detail, and upper register air but often gave up some presence and weight." The CDi-XR is "a good CD player and a solid value," he concluded. In the test lab, JA found that the Cyrus inverted absolute polarity and that its error correction was not as good as that of the best players or transports that he had measured in recent years. (Vol.45 No.4 WWW)

Deletions
Bryston BDP-3 (LG no longer reviews), T+A MP 3100 HD SACD/CD player, Wolf Systems Alpha 3 SX server, not reviewed in a long time.