Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Potent phono preamp delivering the best possible sound at an affordable price
- Offers a wide range of impedance settings for different cartridges
- Can accommodate both moving coil (MC) and moving magnet (MM) cartridges
- Provides a remarkable listening experience with sonic transparency
- Offers flexible adjustment options for various EQ curves
Comparisons (according to reviewers)
- When paired with the sPS-500 power supply, the sPQ-100 gains more focus, weight, and a different atmospheric perspective
Takeaway: The sPQ-100 offers great sound quality for the money with a flexible design. It's a good pick for vinyl lovers.
All
sPQ-100PS
reviews

Manufacturer details
- Input/Output: Stereo RCA jack with earth terminal x 1
- MM Input Signal Level: 3mVac ~ 10mVac @ 1KHz
- MC Input Signal Level: 0.1mVac ~ 1mVac @ 1KHz
- Output Signal Level: 9.5Vac Max
- Output Impedance: 20Ω typical
- Frequency Response: 20Hz ~ 20KHz
- SNR: 100dB typical @ 1KHz
- Input Voltage: 100Vac ~ 240Vac
- Operating Temperature: 0 ~ +40℃
- Dimensions: 106 x 48 x 245(mm)
- Weight: Total 3kg >
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- SOtM's products are known for their sleek, compact, and stylish aluminum enclosures, setting them apart from typical computer-like designs, and resembling attractive audio components.
- They use a Linux-based operating system (Vortexbox or Eunhasu OS) known for its audio playback capabilities, paired with well-established software like Logitech Media Server or Roon, offering a mature user experience.
Select products
sHP-100
- Positioning: A combined USB DAC and headphone amplifier designed for flexible connectivity in modest setups.
- Description: Offers diverse input options and quality digital-to-analog conversion with proven chips, ensuring clean sound in compact environments. Compared to the more specialized functions in the phono equalizer or flagship digital systems, it serves users needing versatile performance in smaller rooms on a moderate budget.
sPQ-100PS
- Positioning: A specialized phono equalizer aimed at optimizing analog vinyl playback.
- Description: Supports multiple EQ graphs and cartridge selections, allowing users to tailor its performance to different vinyl records with precise, natural tone reproduction. Compared to the digital processing in higher-end systems like the sMS-2000 or power amplification of the sPA-1000, it focuses on dedicated vinyl setups.
sPA-1000
- Positioning: A fully balanced Class D power amplifier suited for demanding audio systems.
- Description: Uses advanced power stabilization and balanced circuitry to achieve natural sound with precise control, delivering detailed performance in mid-to-large room environments. Compared to the compact functionality of the sHP-100 and the digital sophistication of the sMS-2000, it meets the needs of users looking for robust amplification with higher build quality.
sCLK-OCX10
- Positioning: A master clock generator developed for high-end digital audio systems.
- Description: Produces a pure 10MHz sine wave clock output with ultra-low phase noise and selectable impedance, thanks to its dedicated analog design refined over many years. Compared to devices focused on signal processing like the sMS-2000 or amplification like the sPA-1000, it serves audiophiles who need tight synchronization and precision.
sMS-2000
- Positioning: An integrated high-end digital audio system configured as the flagship for immersive musical experiences.
- Description: Brings together premium components including a dedicated USB host card, Ethernet interface, high-grade clock module, and custom power supply to deliver exceptional depth and clarity. Compared to the focused roles of the sPA-1000 and sCLK-OCX10, it offers comprehensive functionality and superior performance suitable for large, sophisticated systems.
Our take on the brand
Look inside the brand
Our interview with the brand
What are two key technological innovations or strong opinions that differ you from other brands?
First, we don’t just use advanced technologies like ultra-high-speed digital hardware, precision audio clocking, or noise filtering—we develop them ourselves with a deep understanding of how each element affects sound quality. For example, our proprietary power electronics for audio circuits and custom-designed oscillators play a critical role in delivering our distinctive sound.
Second, while many brands prioritize marketing, we invest heavily in R&D. This means our products may not always be the most widely advertised, but they are built on a solid foundation of innovation and long-term vision. Rather than making minor upgrades, we aim to create fundamentally better products with each release. That’s a philosophy that consistently earns us loyal users around the world.
What's your approach to customer support?
At SOtM, we take customer support seriously. Customers are encouraged to first contact their local dealer or distributor, as they are trained to handle most issues and can provide service in the customer’s native language. However, if further assistance is needed, customers are always welcome to reach out to us directly. When a customer experiences an issue, we aim to respond quickly, diagnose the problem accurately, and offer a solution that minimizes any disruption. We go above and beyond by offering firmware updates, personalized setup help, and sometimes even remote access support to ensure the best possible experience.
What are your favorite tracks for showcasing the strength of your products?
Some of our go-to pieces include:
- Stravinsky – The Firebird Suite (Finale): Great for dynamics and layering.
- Copland – Fanfare for the Common Man: Perfect for testing impact, timing, and space.
- Mahler – Symphony No. 2 "Resurrection": A true challenge for any system, with massive scale and emotional intensity.
We also enjoy film scores for their emotional engagement and wide frequency content. Ultimately, we choose tracks that are musically moving and technically revealing—regardless of genre.
What other products pair best with yours?
Since we produce everything from digital sources to amplifiers and cables—essentially all components except speakers—we typically use speakers from brands like Focal and Magico in our reference systems. All other components in the system are SOtM products, allowing us to demonstrate the full potential of our technology in a fully optimized environment.
Used
SOtM
What if you spend more?
Our summary
Product Strengths
- Ultra-low noise with remarkably quiet backgrounds and effortless transparency
- Delivers Al Harewood's delicate brush work with an outstanding balance of brush "edge" and "swish"
- Clear and distinct sound, with a soundstage that is tall, wide, and deep
- Natural and matter-of-fact nature, one that doesn't feel processed or constrained in any particular way
- The V10 is a highly musical phonostage that resolves fine details, honors tonal colors, and allows the dynamic life in music to breathe at levels that belie the unit's modest price
Product Considerations
- Adjustments to capacitance, gain, and impedance are accomplished by means of a bank of DIP switches on the rear panel, which can be a bit confusing
- The instruction manual states it's possible to set impedance "freely between 50 and 550 ohms" and add 6 addition dB of gain, but to do so contact your Hegel dealer for more information
- Not as versatile as the PS Audio Stellar
- The V10 does not try to mask physical imperfections on the record
Comparisons (according to reviewers)
- Vs Simaudio MOON by Simaudio 610LP—the Hegel V10 performs so well in comparison to the much more expensive 610LP as to be encouraging
- Vs Aurorasound VIDA Prima—the Hegel V10 seemed to pull out more detail than the VIDA Prima
- Vs Aqvox Phono 2 Ci—V10 allows one to easily explore the musicians' context and intent better
- Vs Rega Aria 3—the V10 betters it by quite a way, showing how the Hegel has a more incisive and detailed nature
Takeaway: The Hegel V10 is a great sounding, well-made phono stage that produces the 3D, of both the music and the space behind it, while honoring the purity and simplicity of the recording. It has connectivity and configurability as well.
Video review
Our take on the brand
Product Strengths
- Comprehensive spec sheet
- Versatile phono stage with balanced outputs offers greater levels of gain
- Depth, detail, and an analogue character
- Flexible and capable
- Extracts the very best from any cartridge
- The casework feels solid and beautifully finished
Product Considerations
- Adjusting capacitance and loading via hidden dip switches under two small covers for left and right channels is a little trickier than the previous model's dial adjusters
- DIP switches are fiddly to use
- Busiest and brightest recordings can appear just a little sanitised
Comparisons (according to reviewers)
- The R35 offers a thorough update of its feature set, making it—on paper at least—one of the most versatile phono stages on the market today
- The R35 ups the ante by some margin, despite looking deceptively identical to the retired R32 front on
- Compared to the Hegel V10, the R35 is more playful dynamically with fatter bass, there is more depth in the soundscape, and a slightly larger range of timbres
Takeaway: The R35 is a versatile phono stage that can extract the best from any cartridge and has a comprehensive spec sheet. It offers depth, detail, and an analogue character that underlines vinyl's enduring appeal.
Video review
Our take on the brand
Product Strengths
- Crisp, clean, and spacious tone, which is fun to listen to, tonally neutral, and detailed
- Good and solid build quality
Product Considerations
- Substandard interface, with tiny buttons and labels, can be difficult to use
- In single-ended mode, the sound presentation can have slightly edgy mids
- Smaller interface font than the M6 makes the values slightly harder to read
- Size and weight might require sturdy shelf support
Comparisons (according to reviewers)
- M6x has an appreciable reduction in its noise floor and improved dynamic range compared to M6 Vinyl
- M6x has a slightly well-lit upper midband and a drier and leaner bass compared to ModWright PH 9.0 tube phono stage
- M6x Vinyl is a clear step up, having a crisp, clean, and spacious tone compared to Rega Aria Mk3
Takeaway: The M6x is a versatile phono stage that offers balanced connections, multiple inputs and solid build quality. It is sonically neutral and lets records speak for themselves.
Video review
Our take on the brand
Product Strengths
- Offers a 'truthful' signal transmission with attributes of speed, low noise, vanishing grain, and purity—delivering a solid sonic performance
- Excellent build quality, with robust aluminum chassis and quality parts
- The knobs offer a silky-smooth feel, and the remote is well-designed and easy to use
- Offers a detailed sound
Product Considerations
- The XLR inputs and outputs are more for interface convenience, as the internal circuitry is single-ended
- Some reviewers note a lack of density in the lower midrange compared to other preamps
- The EX-P7 can sound too analytical if paired with already analytical components
- May not match high-end SET amplifiers in accurately conveying timbre and texture of vocals
Comparisons (according to reviewers)
- Vs Denafrips Athena preamp, the EX-P7 is faster, more linear and agile, but lacks some density in the lower midrange
- Vs Kinki Studio EX-M1 Integrated Amplifier, the EX-P7 (paired with EX-B7 monoblocks) sounds beefier, more extended in the bass, and rounder, while the EX-M1 is leaner and feistier
- Vs Audia Flight FLS1 preamplifier, EX-B7 monoblocks combined with the FLS1 gained resolution, clarity and transparency
Takeaway: The Kinki Studio EX-P7 preamp is well-built and offers a technically correct sound, making it a great option for those seeking a detailed and revealing listening experience when paired with the right components. It is designed with quality components, inside and out, and the overall product exudes quality.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- The sPQ-100 offers a remarkable listening experience for such a compact and affordable phono preamp
- It offers a wide range of impedance settings for different types of cartridges, allowing fine-tuning of analog setups
- It can accommodate both moving coil (MC) and moving magnet (MM) cartridges
- The design is minimalist, and the unit is housed in a rugged all-aluminum enclosure
- Intuitive switches on the top of the chassis provide control over cartridge settings and playback parameters
Product Considerations
- The SPQ-100 delivers powerful performance, but benefits from being paired with the sPS-500 power supply for more focus and weight
Takeaway: The sPQ-100 phono preamplifier combines a carefully executed design, flexible adjustment options, and excellent sound quality for the money. It offers a lot of flexibility and is a true analog hub for vinyl collectors
Video review
Our take on the brand
Our Summary
Product Strengths
- Offers a versatile range of adjustments, including nine input impedance choices and four gain options, to match various cartridges
- Offers three different equalization curves (RIAA, Decca London, and American Columbia), unusual for phono stages in its price range
- Produces a clean, smooth, lucid, and well-balanced sound that is uncolored and neutral, allowing for greater transparency and speed
- Musical, smooth, coherent and dynamic, with a very good pace, rhythm, and timing
- Touchscreen interface is easy and intuitive to use
Product Considerations
- Moving magnet capacitance is set at 220pF and is not adjustable
- Some reviewers express concern about potential RF interference from the digital display affecting the analog circuitry, particularly with sensitive MC cartridges
- Instrumental images may be smaller than with other phono stages
- May sound a little weightless compared to significantly more expensive phono preamps
- Reviewers note the forthcoming PSU-5 power supply
Comparisons (according to reviewers)
- Compared to a similarly priced phono stage, the Gold Note PH-5 provided greater insights into how Miles Davis played each note, and was more full-bodied and dynamic
- The Pathos In the Groove was more spacious and shapely sounding but lacked the PH-5's sense of control and smoothness
- Compared to the Gold Note PH-10, there's a remarkably similar sound, with a tad more weight to recordings played through the more expensive PH-10
- The PH-5 sounds closer to the GrandiNote Celio MK IV—a bit richer, smoother, and more saturated—whereas the ESE Lab Nibiru is more about speed, precision, and transparency
Takeaway: The Gold Note PH-5 is a versatile phono stage that sounds musical and natural. It provides many options to adjust the sound, and it is an affordable way to get great performance from vinyl records.
Video review
Our take on the brand
Our Summary
Product Strengths
- Straightforward, high-quality preamp that does everything asked of it, very well
- Includes tone control knobs for bass and treble to personalize the listening experience
- Allows turntable users to switch between moving magnet (MM) and moving coil (MC) modes
- Features seven source audio inputs, a front-panel 3.5mm headphone jack, Bluetooth 5.1, optical and USB inputs, as well as a phono stage for turntables
Product Considerations
- Bluetooth 5.1 connectivity, while present, is not super high resolution compared with Wi-Fi and may not appeal to those seeking a more robust streaming experience
- Has no balanced inputs
Comparisons (according to reviewers)
- Against Rotel's RC-1572 MKII, the Adcom GFP-915 wins in many audiophile categories, such as a lower reported total harmonic distortion and noise floor
- The Schiit Freya S stereo preamp at $599 is another solid, no-frills audiophile option that can compare to the Adcom GFP-915
- The NAD C 3050 integrated amp's HDMI switching, internal DAC, Bluetooth 5.4 and phono stage might sway one to spend a few hundred more dollars than the Adcom
Takeaway: The Adcom GFP-915 is a traditional stereo preamp that delivers quality performance and offers a range of useful features for audiophiles. It is a worthwhile option for those seeking a simple and effective way to manage audio sources and volume control.
Video review
Our take on the brand
Our Summary
Product Strengths
- Features a fully discreet headphone amplifier built-in that sounds good
- Offers flexibility with passive, low gain, and high gain settings, not commonly found at its price point
- Build quality feels good, with a nice textured black finish
- Features a precise 128-step attenuator for accurate left-right balance, unusual for a $699 preamplifier
- Features a metal remote with volume, mute, and input selection
Product Considerations
- One reviewer experienced the Kara going into protection mode and muting the sound when adjusting the volume quickly—requiring a power cycle to resolve
- One reviewer said they prefer the RCA input and output sound
- XLR inputs for stereo mode are not available
Comparisons (according to reviewers)
- Vs Schiit Freya S: It replaces the Freya S and has significant upgrades, including a headphone jack and a more powerful power transformer
- Vs Pass Labs HPA1: The Pass Labs is a better-sounding pre-amplifier and headphone amplifier overall, but is significantly more expensive
Takeaway: The Kara preamplifier offers great flexibility with gain options and a good-sounding headphone amplifier. It's a well-built component that could be a good addition to an audio setup, especially if clarity is valued.
Video review
Our take on the brand
Our Summary
Product Strengths
- Balanced connections improve sound, though stellar audio is available via RCA inputs
- Tighter and continuous control over load impedance via a potentiometer control
- Discrete circuit design offers a more neutral sound than integrated circuits
- Two turntables can be connected at once, one with XLRs and one with RCAs
- Expanded soundstage and individual instrument placement both horizontally and vertically
Product Considerations
- Turntable with XLR outputs needed to experience its best features
- More expensive if balanced connection features are not being used
- Tube box will push coloration into the mix, so tubes need careful system matching
- Balanced outputs and moving coil cartridge are needed to reveal the sort of detail that vinyl aficionados champion
Comparisons (according to reviewers)
- Vs NAD Phono Preamp PP-1: Allows for markedly more detail and separation between instruments
- Vs Phono Box S3 B: Integrates all the technology from the SB3 and adds in a few extra features, as well as a potentiometer
- Vs Projects Tubebox DS3: The sound is far more clear, and the weighted treble and upper spectrum sound more pronounced
Takeaway: The Pro-Ject Phono Box DS3 B unlocks the potential of a turntable, enhancing the listening experience with more dynamics, details, and soundstage. It's a versatile phono preamp with remarkably neutral and detailed sound.
Video review
Our take on the brand
Questions? Ask the brand's dealers.
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