By aspect — in detail
The one thing sources genuinely split on, and the split tracks what was plugged in rather than any disagreement about the numbers. Audio Science Review reported healthy power into a 33-ohm load — a reader following the review read the published graph as roughly 1.4 watts — and confirmed the 300-ohm output clears its 100 mW minimum threshold, with distortion so low the graph had to be rescaled in low gain. Reviewers running high-impedance dynamics report headroom to spare: Prime Audio drove a 300-ohm HD 650 and a 350-ohm FiiO FT3 on low gain, MoonStar drove an Arya Organic and a Sivga P2 Pro, an owner on HifiGuides runs an HD 600 without complaint, and Ichos calls it plenty for difficult loads. Against that, Headfonics — reviewing the same box with the same 1.7-watt claim in front of it — concluded it is oriented toward lower-impedance gear and lists limited power as one of two cons, and a strand of the ASR thread argues that anything HE6-class is out of reach. That last point is not really contested: everyone agrees this is not a several-watt amplifier. What is contested is whether that matters, and for most headphones the sources say it does not.
Measured
Audio Science Review, on an Audio Precision analyzer: healthy power into a 33-ohm load and a 300-ohm result that clears the reviewer's stated 100 mW minimum, with noise and distortion low enough in both tests that the graph had to be scrolled up to locate them in low gain. SMSL claims 2.5 W x2 into 16 ohms and 1.7 W x2 into 32 ohms, an 8.2 Vrms headphone output, near-zero headphone output impedance and two gain settings. The 4.4 mm jack, per the reviewer, delivers no more power than the 6.35 mm one.
⚠ vs. listeners — SMSL's published headphone figure and the bench do not quite agree: the spec says 1.7 W into 32 ohms, and an ASR reader following the review recorded the measured result as roughly 1.4 W into 33 ohms. A heavier load accounts for part of that but not all of it, and the gap matters precisely because the argument is about headroom. Use the measured number if you are calculating whether a specific headphone will get loud enough.
Where it splits
enough power for real headphones, 300-ohm dynamics included74%
“Headphone power with 300 ohm nicely passes my minimum threshold of 100 milliwatts”
Amir · Audio Science Review
underpowered for hard loads; not the class leader on drive26%
“It is not meant to drive high-impedance headphones.”
Lynn · Headfonics
Quiet enough that the measurement had to be rescaled to find it, and quiet enough in practice that most reviewers heard nothing at all with deliberately sensitive in-ears. The headphone output impedance is specified as near zero, which is the figure that actually matters for multi-driver IEMs, and reviewers pairing it with sensitive earphones — Campfire Audio Fathom, HiBy Project ACE, FiiO FA19, Spirit Torino Twin Pulse — consistently report a black background. Two hedges keep this from being unanimous. MoonStar describes the hiss with sensitive IEMs as tolerable rather than absent, which is a weaker claim than the others make. And Audio Discourse heard faint clicking through IEMs when starting playback on a MacBook running a beta macOS, though he tested the same unit on Windows without it and explicitly declines to pin the fault on the DAC. Neither report describes anything audible during music.
“The distortion and noise were so low that in both tests I had to scroll the graph up to see where it landed in low gain mode!”
Amir · Audio Science Review
“There’s no hiss or background noise, even with very sensitive IEMs.”
Prime Audio
“the extremely low output impedance and the lack of background noise makes it ideal for use with sensitive earphones”
Petros Laskis · Ichos Reviews
“Yes, even with sensitive IEMs, I can say that the hissing is tolerable from a subjective perspective.”
Gökhan Aydın · MoonStar Reviews
Measured
SMSL specifies headphone output impedance as near zero and line output impedance as 100 ohms, with 122 dB dynamic range and SNR at the headphone output and 132 dB at the XLR line output. Audio Science Review's low-level test notes that the 50 mV output result is the best achievable without a third, negative gain setting — the usual limit on how quiet a two-gain desktop amplifier can get at in-ear listening levels.
Transparency
Strong consensus · 7 srcThe strongest point of agreement in the whole set, and the reason the box exists. Audio Science Review expected SINAD around 120 dB at this price and measured better, landing the unit inside their top-twenty list, with dynamic range, IMD, multitone and jitter results all described as excellent and a THD-versus-frequency sweep to match. The listening reports agree without exception: Ichos calls it achromatic and perfectly neutral, Prime Audio calls the DAC and headphone outputs uncoloured, Headfonics calls it one of the less coloured SMSL units, MoonStar describes a balanced and neutral signature, and an owner on HifiGuides calls it the epitome of the word. Audio Discourse adds the useful detail that the ES9039Q2M avoids the metallic upper-midrange glare that dogged the older ES9038Q2M. The one wrinkle is not about the fact but about how to feel about it — Ichos lists the absence of any special sonic character as a con, and an owner who moved to it from a Schiit Bifrost 2 concluded it was not an upgrade as a converter. The RCA output measures a little behind the XLR, so use the balanced out where you can.
“I expected SINAD of 120 dB for this price class but we have more than that, nicely landing the unit in our top 20 best list”
Amir · Audio Science Review
“The RAW-MDA1 is achromatic and perfectly neutral without imposing a character of its own”
Petros Laskis · Ichos Reviews
“The RAW-MDA1 is one of the less colored versions SMSL currently has, promoting the midrange with a forward push.”
Lynn · Headfonics
“SMSL knocked it out of the park. The RAW-MDA1 sounds neutral and transparent.”
J808 · HifiGuides Forums
Measured
Audio Science Review, on an Audio Precision analyzer: SINAD above 120 dB at the balanced output with volume set for a nominal 4 V, improving further at the full 5.3 V output, and a smaller-than-usual drop at the RCA output. Dynamic range, the IMD sweep, multitone performance and the 50 Hz-into-600-ohm test are all described as excellent, and jitter is clean on USB and coaxial with only faint spurious tones on Toslink. SMSL's own claim is THD+N of 0.00005% (-124.5 dB unweighted), 132 dB dynamic range and SNR at XLR, 127 dB at RCA.
⚠ vs. listeners — There is no conflict about what the instrument reads — it reads flat, and every listener agrees. The live argument is about what follows from that. Ichos hears the ES9039Q2M as smoother and less artificial than the previous generation and reports it as an audible upgrade, a difference nothing in the published measurements distinguishes; the same reviewer lists the absence of a distinctive character as a drawback. And a long-term owner who compared it directly with a Schiit Bifrost 2 concluded that as a converter it was not an improvement, despite the multibit Schiit measuring nowhere near as well. Both are preference claims sitting on top of an agreed measurement, and both are kept.
The strongest practical argument for the box, and the reason it keeps getting recommended over cheaper siblings that measure the same. Two coaxial inputs, two optical, USB-C with a switchable USB 1.1 mode for games consoles, LDAC and aptX HD Bluetooth, balanced XLR and single-ended RCA outputs, line level selectable between fixed and variable so it doubles as a preamp, MQA and MQA-CD decoding, five PCM filters, a set of DSP sound-colour presets, and a full-function remote. Reviewers repeatedly note that the connectivity, not the sound, is the differentiator. Three gaps recur. There is no 12 V trigger, which Amir names in the review itself as the thing he wishes were there. There is no parametric EQ — the sound-colour presets are described by one owner as a gimmick beside real PEQ — and rivals at the price now ship it. And the 4.4 mm front jack is disputed: Ichos says outright that it is not a balanced design, Amir says it is balanced but delivers no more power than the 6.35 mm jack, and a senior ASR member questions the claim without anyone producing a measurement. Audio Discourse also notes you must switch manually between headphone and line output, which he frames as a safety feature as much as a limitation.
“the SMSL has the usual host of I/O options and Bluetooth 5.1”
Prime Audio
“The headphone amplifier has two outputs, 6.35mm and 4.4mm but it is not a balanced design and the latter is just an adapter for convenience.”
Petros Laskis · Ichos Reviews
“It is balanced but produces no more power.”
Amir · Audio Science Review forum
“I don’t ever need more than one optical input but I can see the use for multiple audio sources or even some older video game consoles.”
Corgifall · Audio Discourse
Measured
SMSL's published I/O: USB-C, two optical and two coaxial inputs plus Bluetooth 5.1 with SBC, aptX, aptX HD and LDAC; RCA and XLR line outputs at 2.5 and 5.2 Vrms; 6.35 mm and 4.4 mm headphone jacks. USB carries PCM to 768 kHz/32-bit and DSD512 with DoP256; optical and coaxial are capped at 192 kHz/24-bit with DoP64. MQA and MQA-CD decode on USB, optical and coaxial. Power draw is under 30 W, standby under 0.5 W. There is no trigger output and no parametric EQ.
⚠ vs. listeners — Whether the 4.4 mm output is genuinely balanced is unresolved in public. Ichos states it is not, and is a convenience adapter; the ASR reviewer states it is balanced but produces no more power than the single-ended jack; a Grand Contributor on the same thread asks directly whether it is actually balanced or merely a Pentaconn connector, and gets no measurement in reply. Nothing in the published bench work distinguishes the two cases. Treat the 4.4 mm jack as a cable convenience rather than a power upgrade — which is the one thing all three positions agree on.
Ergonomics
Moderate · 7 srcBetter than SMSL's older boxes by common consent, with one specific and repeated complaint. The tempered-glass colour screen and the multifunction knob are the parts reviewers single out: Amir opens the review by noting how much more polished the display is and how responsive the rotary control feels, Prime Audio calls the menu system among the best it has encountered in a DAC and prefers the graphics display mode, Audio Discourse notes the volume moves in 0.5 dB increments so you cannot overshoot badly, and an ASR poster who owned the cheaper DL200 returned it specifically because the RAW-MDA1's usability was so much better. The complaint is legibility at distance — Headfonics lists the small lettering as one of two cons and ended up using the remote instead, and Ichos qualifies its praise the same way, easy to read as long as you are not too far away. Two smaller notes: Prime Audio wants an auto-standby mode because the unit runs warm in a closed room, and Audio Discourse would prefer a heavier volume knob.
“The first thing I noticed was the much more polished display. It is also quite responsive to rotary control.”
Amir · Audio Science Review
“SMSL has one of the best system menus that I’ve come across in DACs.”
Prime Audio
“Lettering on the screen is too small for legibility at distance.”
Lynn · Headfonics
“The screen has vibrant colors and is easy to read as long as you are not too far away from it.”
Petros Laskis · Ichos Reviews
Build
Strong consensus · 6 srcNo dissent among reviewers. A CNC-machined aluminium chassis in matte black with a tempered-glass front panel, 189 x 45 x 179 mm and just over a kilogram, which is heavy enough that the unit stays put when you pull a headphone plug. Ichos calls the build excellent and the design a clear step up from previous SMSL generations; Amir calls it good looking and compact; an owner on HifiGuides describes a refinement in the manufacturing; Audio Discourse notes approvingly that it finally has four feet rather than three. The only aesthetic grumble comes from MoonStar, who finds the design as anonymous as most gear at this price. Note that the reviewer consensus here runs ahead of the retail picture: the Amazon aggregate sits at 4.2 from 82 ratings, with a second listing for the same product lower still, which is a softer number than the coverage implies.
“The chassis is made from CNC machined aluminum with a black matte finish.”
Petros Laskis · Ichos Reviews
“The physical build is really quite nice and shows a kind of refinement in the manufacturing.”
Raptor168 · HifiGuides Forums
“The MDA 1 has a nice metal shell that uses the same matte finish as their other models.”
Corgifall · Audio Discourse
Broadly and enthusiastically endorsed, with a specific and worth-hearing dissent. The ASR poll ran 331 of 390 votes to the top option and only 22 combined to the bottom two, Amir recommends it outright, Prime Audio gives it its highest recommendation among value DACs, Ichos calls it rightly priced, and Audio Discourse and MoonStar both file it under great value. The dissent is not that it is bad but that it may be redundant. One ASR member argues that SMSL's own cheaper DL200 already delivers the same price-to-performance and that everything the RAW-MDA1 adds is screen, remote feel, extra inputs and XLR rather than sound — a point another member answers by saying he returned his DL200 after buying this one because the usability gap was so wide. Separately, a poster in the Topping DX5 II thread argues the two are not comparable at all, the DX5 II having far more power and hardware PEQ. And a long-term owner concluded that as a pure converter it did not better his Schiit Bifrost 2. All three are minority positions in a set that otherwise agrees this is a lot of box for $250.
“This is about as good as it gets when it comes to value DACs and therefore gets my highest recommendation.”
Prime Audio
“It’s not that long ago this would have been an impressive device even at $500. At $300, this seems like the obvious value choice for a desktop DAC/amp.”
Wunderphones · Audio Science Review forum
“As a value proposition, since the DL200 exists, it's not the best price to performance DAC/AMP out there.”
DeDovla · Audio Science Review forum
“Comparing the DX5 II to the MDA1 completely misses the mark: 7.6W output power, 0.00006% THD+N, and full PEQ support on all inputs make it a precision-engineered device.”
Delmont · Audio Science Review forum
Measured
The ASR review thread's reader poll: 390 votes, 331 for the top rating (84.9%), 37 for the third (9.5%), 16 for the second (4.1%) and 6 for the lowest (1.5%).
