Topping DX3 Pro Plus Review: Desktop DAC/Amp Tested

The desktop DAC/amp combo market has grown crowded, but the Topping DX3 Pro+ keeps appearing at the top of recommendation threads for a reason. For anyone building a first proper desktop listening setup, the appeal is straightforward: one box, one cable, done. The DACs category is full of options that demand more decisions than a beginner wants to make.

What separates a useful combo unit from a compromise is how much performance it actually delivers before you outgrow it. That question is worth answering carefully.

What to Look For in a Desktop DAC/Amp Combo

Output Power and Headphone Compatibility

Output power is the number most buyers underestimate. A combo unit rated for 32-ohm headphones will drive a Sennheiser HD600 or HD650 at sufficient volume , but “sufficient volume” and “optimal control” are different things. Planar magnetic headphones are particularly sensitive to this distinction. Owner reports and community testing consistently show that planars , HiFiMan Sundara, Audeze LCD-2 , reveal limitations in lower-powered combo units that dynamic drivers forgive.

The practical question: what headphones do you own now, and what do you expect to own in the next two years? A 32-ohm IEM user has different requirements than someone planning to move toward 150-ohm or 300-ohm dynamics. Buying to your current headphone rather than your planned headphone is the most common source of regret in this segment.

For the HD600 specifically , the headphone that appears most frequently alongside budget DAC/amp recommendations , the gap between a laptop output and a proper stack is real. Field reports and owner consensus suggest it’s meaningful, not transformative. The HD600 is not the hardest load a budget combo has to drive.

DAC Chip and Measurement Performance

The DAC chip tells you something, but not everything. The ES9038Q2M , present in the DX3 Pro+ , is a well-characterized chip with strong measurement results published on Audio Science Review. Low noise floor, low distortion, flat frequency response. For most headphone listening scenarios, these measurements exceed the audible threshold by a comfortable margin.

What the chip alone doesn’t tell you is implementation quality. Two units using the same chip can measure differently based on power supply design, output stage, and PCB layout. Verified buyer reports and third-party bench tests are more useful than chip model alone when evaluating a specific product.

For practical purposes at the budget and mid-range tier, modern DAC implementations from Topping, FiiO, and similar manufacturers cluster closely on measurements. The differences that matter most for real listening tend to be downstream: output power, output impedance, and build quality.

Connectivity and Input Options

A combo unit’s input and output options define how it fits into your existing and future setup. USB input is non-negotiable for a desktop unit fed from a computer. Optical and coaxial inputs add flexibility for console or television sources. Bluetooth , specifically LDAC support , matters if you use a phone as a primary source and want to avoid the USB cable entirely.

Output options matter for upgrade paths. A line-level output (RCA or XLR) means the unit can serve as a pure DAC later, feeding a separate amp if you outgrow the built-in headphone stage. Combo units without a line-level output are dead ends if your headphone requirements grow.

Exploring the full range of headphone DAC options before committing to a specific form factor is worth the time, particularly if your headphone collection is likely to change.

Build Quality and Long-Term Use

Budget and mid-range combo units vary more in build than in measurements. Encoder feel, front panel rigidity, and display legibility matter over months of daily use in ways that first-impression reviews underweight. Owner reports over six-to-twelve months are more reliable indicators of long-term build satisfaction than launch reviews.

The DX3 Pro+ has an aluminum enclosure and has generally received positive marks from long-term owners on build quality relative to its price tier. The volume encoder , a common failure point in budget gear , has not generated significant complaint volume in verified buyer reviews or community threads.

Top Picks

Topping DX3 Pro+

The Topping DX3 Pro+ occupies a specific and genuinely useful position: a well-measured, all-in-one desktop unit for buyers who want a capable first stack without managing two separate components. Owner consensus across Head-Fi and the r/headphones community consistently positions it as a strong entry point, and ASR’s bench results confirm the measurement story , the ES9038Q2M implementation performs cleanly at its price tier.

Bluetooth LDAC support is a meaningful differentiator here. For a phone-first listener who streams Qobuz or Tidal, the ability to use the DX3 Pro+ wirelessly without accepting AAC or SBC compression is a practical advantage. Verified buyers who use LDAC frequently rate it as one of the unit’s most-used features in everyday listening rather than just a spec-sheet item.

The headphone amplifier section is where the honest trade-off lives. The 6.35mm output handles 32-ohm to 150-ohm headphones without issue for most dynamic driver use cases. Owner reports and community testing suggest the HD600 drives well enough at moderate listening levels. Planars are a different story , field reports from Sundara and LCD-2 owners indicate the amp section runs out of headroom before those headphones are fully controlled. The ‘scales with source’ framing that can sound like audiophile mythology turns out to have real content for planars specifically. If planar magnetics are your current or planned headphones, the DX3 Pro+ is a starting point, not a destination.

The line-level RCA output means the unit is not a dead end. It can serve as a pure DAC feeding a separate amp , the Topping L50, for instance , when the headphone stage becomes the limitation. That upgrade path is worth factoring into the initial decision.

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Buying Guide

Combo Unit or Separates?

The central decision in this category is whether a single unit does enough for your current and near-future needs. Combo units win on desk space, cable management, and initial outlay. Separates , a dedicated DAC and a dedicated amplifier , typically offer more output power, better upgrade flexibility, and the ability to replace one component without replacing the other.

For dynamic driver headphones under 150 ohms, a well-implemented combo unit at the budget tier is a legitimate choice. The performance ceiling is high enough that most buyers will not outgrow the DAC section for years, if ever. The amp section is the more likely constraint.

For planar magnetic headphones, the separates argument strengthens considerably. Dedicated amp stages in the mid-range bracket , the Topping A50s, the JDS Atom Amp+ , deliver meaningfully more headroom and damping factor than combo units at comparable total spend.

What “Budget Tier” Actually Means Here

Budget in this context means a specific performance band: clean measurements, adequate power for common dynamic driver headphones, and a build quality that holds up under daily use. It does not mean compromised audio quality by any absolute standard. Modern budget DAC/amp units from credible manufacturers measure better than mid-range gear from a decade ago.

The practical limit of the budget tier is headphone compatibility. High-impedance headphones above 250 ohms , the HD650, the Beyerdynamic DT 880 600Ω , benefit from amplifier stages that budget combo units don’t provide. If your headphone collection includes or plans to include those loads, budget your stack accordingly.

The broader DAC and headphone amp landscape has expanded at the budget tier over the past three years. Options that would have been considered mid-range in 2020 now sit in the entry bracket. That context matters when reading older recommendations.

Comparing the DX3 Pro+ to the FiiO K7 and K11

The FiiO K7 and K11 occupy the same functional category , desktop combo DAC/amp , but target a slightly different use case. Both FiiO units offer more output power than the DX3 Pro+, making them better suited to high-impedance dynamics and planars. The trade-off is price tier: both sit above the DX3 Pro+ on the spend curve.

The DX3 Pro+ holds the edge on Bluetooth LDAC support , neither FiiO unit matches that wireless capability at the time of writing. For a phone-first listener who values wireless input, the Topping remains the logical choice at its tier.

For buyers whose primary source is a desktop or laptop via USB, and whose headphone collection includes or plans to include planars or high-impedance dynamics, the FiiO K7 represents a meaningful step up. The choice between them is less about which measures better and more about which amp section your headphones actually need.

Output Impedance and IEM Compatibility

Output impedance is underrepresented in combo unit reviews and matters more than most buyers realize, particularly for IEM users. An output impedance above 1 ohm will alter the frequency response of multi-driver IEMs with low-impedance loads. For single-dynamic-driver IEMs, the effect is smaller but still present.

The DX3 Pro+ measures well on output impedance , verified by ASR bench results , and is considered IEM-safe by owner consensus. This matters for buyers who intend to use the unit with both IEMs and full-size headphones from the same output.

Frequently Asked Questions

Is the Topping DX3 Pro+ powerful enough to drive the Sennheiser HD600?

Owner reports and community testing consistently show the HD600 drives adequately from the DX3 Pro+ at moderate to high listening levels. The HD600 is a 300-ohm headphone but is not particularly difficult to drive for its impedance class , sensitivity is high enough that most budget combo units handle it. The gap between the DX3 Pro+ and a dedicated amplifier stack exists, but field reports suggest it is meaningful rather than transformative for this specific pairing.

How does LDAC Bluetooth on the DX3 Pro+ compare to a wired USB connection?

LDAC at its highest bitrate transmits enough data to be competitive with CD-quality wired sources in measured terms. The practical difference between LDAC and USB at the DX3 Pro+‘s DAC tier is unlikely to be audible under normal listening conditions. Verified buyers who use LDAC as their primary input report no meaningful degradation versus USB. LDAC is a genuine advantage over AAC and SBC, and the DX3 Pro+ is one of the few budget combo units to support it.

Should I buy the DX3 Pro+ now and upgrade later, or spend more on separates from the start?

For dynamic driver headphones under 150 ohms , HD600, HD560S, most Beyerdynamic and AKG dynamics in that range , the DX3 Pro+ is a reasonable starting point. The line-level RCA output means you can add a dedicated amp later without replacing the DAC. For planar magnetic headphones, the separates argument is stronger from the start. Owner consensus is clear that planars benefit from dedicated amp stages with more headroom than the DX3 Pro+ provides.

What is the difference between the DX3 Pro and the DX3 Pro+?

The DX3 Pro+ is a revised version of the original DX3 Pro, with an upgraded DAC chip (ES9038Q2M versus ES9038D2M), LDAC Bluetooth support added, and revised output stage measurements. ASR’s bench results for the Pro+ show a cleaner noise floor than the original. For buyers choosing between them used or new, the Pro+ is the stronger choice on every metric that has been tested and published.

Can the DX3 Pro+ be used as a pure DAC with a separate headphone amp?

Yes. The Topping DX3 Pro+ includes RCA line-level outputs that allow it to feed a separate headphone amplifier. This is the intended upgrade path , buy the unit as an all-in-one, and if the headphone amp section becomes the constraint, add a dedicated amplifier downstream while keeping the DAC section in service. That flexibility is one of the more practical features of the unit and distinguishes it from combo units with headphone output only.