Topping DX3 Pro+ Review: The Knob and the Connection

Twelve firsthand writers document capable headphone playback alongside missed knob steps, output-mode confusion and a Bluetooth reconnection workaround.

Article date October 13, 2026Drew Wiberg / Recluse Studio6 semantic kinds

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Scope note: This literature review concerns the Topping DX3 Pro+, using twelve distinct writers’ original measurements and actual-use accounts. The original DX3 Pro and V2 appear only as comparison baselines. Headphone loads, gain, equalization and input/output modes stay attached to the results. Every performed test and listening action belongs to the named writer; the proposed comparison remains unperformed.

A headphone amplifier can reproduce music well while its volume knob misses a step. A wireless connection can announce that it has connected and still produce silence. The DX3 Pro+'s published use record contains those practical failures alongside successful headphone listening and low measured distortion.

The useful verdict concerns playback and operation together. Twelve writers support the DX3 Pro+ as a capable converter and headphone amplifier in specific systems, while their accounts leave the knob, output settings and Bluetooth reconnection in the purchase decision. A good bench result answers a narrower question than whether every control will behave as expected.

The current offer costs $199 USD

The catalog ID is 688e6a931f3efdac2bb8. On 13 October 2026, HiFiGo’s exact DX3 Pro+ listing offered Black and Silver units for $199.00 USD each. Its live product data marked both available, and the store currency was USD. Those are item prices before checkout charges.

Topping’s original manual supplies the connection and operating specifications. The device accepts digital sources, provides headphone and RCA analog outputs, and has a remote with selectable output modes. Its RCA connection feeds powered speakers or another amplifier; it is not a power amplifier for passive speakers. Manufacturer material supplies specifications only.

Three substantial reviews and nine shorter owner accounts qualify. The dated records run from October 2021 to February 2024; two named comment sequences show only relative ages. Repeated posts by the same writer count once. This self-selected sample establishes useful conditions and counterexamples, rather than a product-wide failure rate.

Amir received a Topping sample, and David Becker disclosed an Apos Audio sample and affiliate links. Srboljub Stojanovic uses purchase links, while his article does not establish the sample’s origin. The selected owners’ financial affiliations remain unstated.

Headphone power has a load and a setting

Amir at ASR measured low conversion noise and distortion, then tested headphone output across electrical loads. His high-gain listening worked well with Sennheiser HD650 and Drop Ether CX headphones. A more demanding Dan Clark Stealth pairing reached protection once at maximum volume, although Amir could not reproduce that event on the next attempt.

That record supports substantial capability with a specific limit. It does not establish infinite power or prove that a low headphone impedance alone predicts a problem. Sensitivity, listening level and any equalization also affect what the amplifier must supply.

Dxnc used HE400i 2020 headphones with bass equalization and reported enough volume. LTyla tested HD6xx headphones and Moondrop Blessing 2 earphones without reporting a protection problem. Those pairings qualify as successful use, with no extension to every headphone.

JRS’s Sundara account makes the equalization cost visible. After allowing about 10 dB of digital margin for bass adjustment, the owner had enough loudness but wanted a little more reserve. Raising bass through software can require lowering the overall signal to avoid overload, so the resulting volume margin belongs beside an amplifier’s advertised power.

The listening descriptions disagree

David Becker at Prime Audio connected a Windows 11 computer by USB, used Kali LP-8 powered monitors and tried several headphones and earphones. Becker described favorable, quiet playback with different gain and volume settings for the Sundara, DT990 Pro and Moondrop KATO.

Srboljub Stojanovic at iiWi also found strong drive and detail, but disliked the vocal presentation and preferred the fuller character of other converters in his comparisons. His RCA listening carried similar reservations. The two reviewers’ judgments remain attached to their equipment and listening methods; neither article supplies a common blinded, level-matched comparison that settles a universal DX3 Pro+ sound.

Two owners add useful distinctions in Prime Audio’s named comments. Brendan reported successful listening with older 600-ohm HD520 headphones and bass adjustment. PHILIP H WEATHERILL initially obtained weak speaker-system output, then improved the result after selecting DAC mode and changing computer playback levels. That sequence demonstrates a setup correction, without proving that the initial experience was a hardware fault.

Two owners reproduced missed knob steps

haen at ASR turned the knob and heard its click, but sometimes saw no corresponding increase on the volume display. Reducing volume and using the remote worked. This is a concrete control failure observed on that unit, with no confirmed explanation inside the encoder or firmware.

Miiman independently reported missed steps, while using the remote from farther away made the problem less intrusive. The remote workaround changes the inconvenience; it does not repair the knob.

jools reported a working encoder and mostly used the remote too. The owner heard no speaker difference against a V2, appreciated separate remembered output volumes, and successfully connected PC USB, television optical and phone Bluetooth. A preliminary headphone preference was explicitly less controlled than the speaker comparison.

The sample therefore contains both working and faulty controls. Two reports cannot estimate the chance of failure, while the successful unit cannot erase the two observed faults.

Automatic reconnection deserves a separate test

Becker successfully paired a Sony player, an iPhone and a computer. jools also reported working phone playback. fquails’s longer-use account describes two units used daily for two years, with wired inputs working well but automatic Bluetooth reconnection sometimes producing no sound.

fquails manually disconnected the source after listening and reconnected it for the next session. The owner reported that this restored usable playback. The account identifies a repeatable working routine, while leaving the cause of the silent automatic connection unresolved.

First pairing and later reconnection are different tasks. Combining them into one statement that Bluetooth works would discard the condition that made the longer-use report useful.

A next comparison would include operation

An unperformed test would fix the source, recording and headphones, match playback levels, and record gain and equalization. Separate runs would count knob clicks against display changes, check remembered output volumes, and compare first Bluetooth pairing with repeated automatic reconnection after idle periods.

The DX3 Pro+ earns consideration through documented conversion and headphone use. Its assessment remains incomplete until the intended headphones, control method and connection routine are included, because a listener needs the device to reach the right output reliably as well as reproduce it well.

The twelve firsthand records

All originals were inspected on 13 October 2026. Each number represents one distinct writer; named comments and forum anchors identify records within shared pages.