SKU: 46189762424

SPL Diamond DAC Digital to Analog Converter and Preamplifier

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Description

SPL Diamond DAC Digital to Analog Converter and PreamplifierSPL products are currently ordered on demand with an approx 2 week lead time. Diamond PREMIUM DAC WITH VOLTAIR TECHNOLOGY. Diamond is the perfect DAC and preamplifier for everyone who plays music exclusively from digital sources. Diamond offers connectivity for six digital sources and an external word clock. The superior VOLTAiR technology and the premium DAC with the unequalled DLP120 combined with an analog volume control allowing for highest

SPL products are currently ordered on demand with an approx 2 week lead time.

Diamond

PREMIUM DAC WITH VOLTAIR TECHNOLOGY.

Diamond is the perfect DAC and preamplifier for everyone who plays music exclusively from digital sources. Diamond offers connectivity for six digital sources and an external word clock. The superior VOLTAiR technology and the premium DAC with the unequalled DLP120 combined with an analog volume control allowing for highest resolution at any volume makes the Diamond an one-of-a-kind DA converter that delivers finest soundstages with an unrivalled analog feel.

Reviews

“Richness of sound, flawless performance and dynamics are also included – together with a features set that should leave hardly any wishes unfulfilled: an almost irresistible offer.”

Hifistatement
Klaus Schrätz

“Diamond scores with HiRes capability up to PCM 768 and DSD256. Thanks to its VOLTAiR technology, it operates with extremely low noise and distortion as well as rich in dynamics and with high resolution.”

lite-Magazin
Volker Frech

“Music lovers who exclusively use digital sources and are looking for a DAC/preamplifier that is as easy-to-use as it is versatile and, above all, has a powerful sound, have come to exactly the right place with the new SPL Diamond.”

Lowbeats
Frank Borowski

Everything under control

The volume is adjusted with a solid, milled aluminum, rotary knob. The Alps RK27 “Big Blue” potentiometer gives a pleasant “spoon in the honey” rotary feel.

Source of joy

Up to 6 digital stereo sources can be connected to Diamond.

Diamond offers each a stereo USB and AES input as well as each two optical and coaxial stereo inputs. Via USB, both PCM audio and DSD audio can be converted. PCM audio is received in S/PDIF format, both coaxial (RCA), optical (Toslink F06) and balanced (AES/EBU).

The source selection is done via the selection control on the front. The selected input is also shown in the dot matrix LED display: USB, COA1, COA2, OPT1, OPT2 or AES.

After approximately two seconds, the display shows the type of clock source and the detected sampling rate.

Always in time

Diamond can not only synchronize to the clock integrated in the digitally fed source signal. As a specialist for digital players Diamond offers a word clock input. The source of the clock signal can be selected via the CLOCK switch.

Source = Diamond synchronizes to the digital clock in the source signal.
Word = Diamond synchronizes to the digital clock present at WORD IN.

Well informed

The DAC automatically picks up the sampling rate and resolution of the digital playback source. No matter if a streamer, computer, CD player or an external word clock is connected.

The detected sampling rate and the selected clock source are shown in the dot matrix LED display. For example, U768 is an acronym for a clock signal in the USB stream with asampling rate of 768 kHz.

SPL Diamond – Premium DAC with VOLTAiR technology

 

 

All variable – or Slave Thru

Diamond provides two stereo output pairs for connecting power amplifiers or active loudspeakers. One pair of outputs with XLR, the other with RCA outputs. Both have the same output signal, which is controlled by the volume control on the front panel.

The volume control for both outputs can be individually switched out of the signal path via DIP switch on the back of the device. For example, a headphone amplifier with its own volume control can be connected to one of the outputs.

The DAC768

The highly acclaimed AKM AK4490 Velvet Sound™ premium DAC chip is used as the converter chip in the digital-to-analogue converter, which thanks to its architecture reproduces the finest sound details.

It converts PCM audio with a resolution of 32 bits and a sampling rate of up to 768 kHz, which is equivalent to 16 times CD resolution. Direct Stream Digital is also supported up to a resolution of DSD4 or DSD256. In contrast to the DAC 768xs, the DAC768 not only offers an AES/EBU digital input, but also the SPL DLP120 with VOLTAiR technology.

The DLP120 (Dual Low-Pass)

The analog output of the DAC chip must be filtered by a low pass filter. Phonitor xe has two of them: One for PCM audio and one for DSD audio, since different roll-off frequencies are required.

In contrast to all other DACs in the world, the low pass filters here are built using VOLTAiR technology, which provides a plus in dynamics and headroom and sound.

Sounds good

With all devices of the Professional Fidelity series we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.

lite magazin – SPL Diamond

 

 

The VOLTAiR Technology

The 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps. In our Professional Fidelity series, we refer to this unsurpassed technology as VOLTAiR technology.


The highest possible audio quality requires the highest possible audio operating voltage.

The 120V technology works with +/-60 V. To be able to handle such a high voltage, we have developed special proprietary operational amplifiers that can operate with a DC voltage of +/-60 V: the SPL 120V SUPRA operational amplifiers. This high voltage would destroy conventional components and operational amplifiers.

The 120V technology achieves exceptional technical specifications and sonic benefits. Technically, in terms of dynamic range, signal-to-noise ratio and headroom. Sonically, in terms of richness of detail and an absolutely relaxed listening experience.

By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.

The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.

Specifications

Analog Inputs & Outputs: XLR (balanced), RCA

  • Maximum output level: 32.5 dBu
  • Output impedance: 75 Ω
  • Frequenzgang (-3 dB): 10 Hz " 300 kHz
  • Crosstalk (1 kHz): -108 dBu
  • THD & N (0 dBu, 10 Hz " 22 kHz): 0.001001 %
  • Noise (A-weighted): -102.3 dBu
  • Dynamic range: 135 dB

Digital Inputs, DAC768

  • AES/EBU (XLR), PCM sample rates:
    44.1/48/88.2/96/176.4/192 kHz
  • Coaxial SPDIF (RCA), PCM sample rates: 44.1/48/88.2/96/176.4/192 kHz
  • Optical SPDIF (Toslink F 06), PCM sample rates: 44.1/48/88.2/96/ with Glass fibre <1m 176.4/192 kHz
  • USB (B), PCM sample rates: 44.1/48/88.2/96/176.4/192/352.8/384/705.6/768 kHz
  • USB (B), DSD over PCM (DoP), sample rates: 2.8 (DSD64), 5.6 (DSD128), 11.2 (DSD256) MHz

Internal Linear Power Supply with Shielded Toroidal Transformer

  • Operating voltage for analog audio: +/- 60 V
  • Operating voltage for relays and LEDs: + 12 V

Mains Power Supply

  • Mains voltage (selectable, see fuse chamber): 230 V AC / 50; 115 V AC / 60 Hz
  • Fuse for 230 V: T 500 mA
  • Fuse for 115 V: T 1 A
  • Power consumption: max. 40 VA
  • Stand-by power consumption: < 0,3 W

Dimensions & Weight

  • W x H x T (Weite x Höhe inkl. Füße x Tiefe): 278 x 57 x 300 mm, 11 x 2.24 x 11.81 inch
  • Unit weight: 3.15 kg, 6.95 lbs
  • Shipping weight (incl. packaging): 5.35 kg, 11.79 lbs
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 46189762424

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    4.7 ★★★★★
    Based on 15 reviews
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    Product Reviews
    J
    Verified Purchase
    Jonathan
    Dallas, US
    ★★★★★ 5
    Believe the Reviews
    Color: Cooling Blue Cover, Size: King (Pack of 2)
    I purchased these pillows because we were in need of new pillows, I previously had allswell pillows which were from walmart and they were good to start but now they tragically became very sparse and it started to effect my sleep so I saw these after careful review on other pillows and reviews I came across these and I saw some reviews and videos and I ordered them.. first they are king size we ordered they are perfect for the bed, they are plump and soft, they are memory foam which has always worked out for me for support and kept it’s shape these are great it did have a little smell I guess from packaging but other than that they are a huge upgrade from what we had before! I’m excited because they are cooling too! for the price point can’t beat it and this is coming from someone who was about to spend money on a purple pillow this will be good for now definitely buy it.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 28, 2026
    P
    Verified Purchase
    PilarC
    Alexandria, US
    ★★★★★ 3
    Inconsistent
    Color: Cooling Blue Cover, Size: Queen (Pack of 2)
    Ive ordered two different batches of these pillows, the first was a 2 pack, the second batch was a 4 pack. The pillows that came in the 2 pack have a different quality to them. The memory foam feels thicker, takes long to depress and to spring back to form. It offers more resistance, a heavier odor (at the start), and was the pillow that I fell in love with. Things changed when I ordered the 4 pack a couple months later. There was an inconsistency between the foam in these two different batches. both sets of pillows are comfortable. The first batch being firmer means I had to remove more foam before it became comfortable but the 2nd batch being more springy, I was able to keep all the foam inside. I docked a couple stars because I’m not able to provide a consistent experience with these pillows across all three beds in my home. If you need a pillow, order a set and be happy. If you want a bunch of memory foam pillows throughout your house, maybe look elsewhere as these may not all be identical.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 17, 2026
    M
    Verified Purchase
    Mari
    Draper, US
    ★★★★★ 5
    Very cool and comfortable pillows. Great value.
    Color: Cooling Blue Cover, Size: Queen (Pack of 2)
    These pillows are everything described on the site. They do retain shape and don’t flatten out after sleeping all night. They are nice and clean looking and comfortable. The fit on my king size bed is perfect cause I prefer the size to king size. Haven’t had to wash them yet but I have had other pillows with the same material inside and the wash ability is great.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 17, 2026
    J
    Verified Purchase
    Joe
    Carnegie, US
    ★★★★★ 5
    Great pillow
    Color: Cooling Blue Cover, Size: Queen (Pack of 2)
    The pillows feel great. Being able to remove portions of the interior allowed me and my wife to have a perfect fit. They do stay cool which seems to have helped with my restlessness.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 12, 2026
    D
    Verified Purchase
    dbknittel84
    Los Angeles, US
    ★★★★★ 5
    Very comfortable and stays cool on the blue side.
    Size: Upgrade Queen (2 Pack)
    Awesome pillow. So comfortable and soft. Stays cool all night long on the cool side.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 14, 2026

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