Enleum HPA-23RM & HPA-23RMH

hi-fi+ found that the relaxed, liquid presentation initially understates its detail, but extended comparisons showed that the information is fully present. The Ear, Part Time Audiophile and Soundnews likewise praise its revealing nature, separation, clarity and freedom from congestion; one YouTube reviewer did find its focus on the smallest details less exceptional.

The prevailing description is natural, harmonically rich and highly musical rather than clinical. Reviewers praise organic timbre, sweet but extended treble and a rich tonal palette, while the selectable outputs provide a more neutral, detailed voltage presentation or a warmer, fuller current-drive character. Some pairings can become overly thick in the bass on current drive, particularly with a multi-driver IEM.

Dynamic authority is a major strength. hi-fi+ heard hard, fast bass slam and full transient snap comparable to mains-powered alternatives, while Soundnews reported flagship-level power, transients and dynamic range. Reviewers using difficult planars including the Stealth and Susvara found the amplifier exceptionally gripping, energetic and unstrained.

The available IEM reports are excellent: hi-fi+ heard zero intrusive hiss in low gain through the voltage output, and Soundnews called it dead silent and IEM-friendly in that configuration. The low output impedance is also reported to avoid damping-related tonal shifts with variable-impedance headphones. Evidence is strongest for the low-gain voltage output rather than every mode and load combination.

Its separate voltage and current outputs are repeatedly praised as more than a novelty, giving dynamic and planar headphones appropriately tailored drive. Reviewers report authoritative results with the DCA Stealth, HiFiMan Susvara, LCD-5, HD800S and Beyerdynamic T1, while low gain and voltage mode serve sensitive IEMs well. Careful output selection matters, as current drive can add excessive bass weight with some multi-driver in-ear monitors.

Construction receives unusually emphatic praise across the reviews. Writers describe a precision-machined aluminium chassis, high tolerances, solid controls, effective side heat sinks and a compact enclosure that feels exceptionally robust. The internal packaging is also singled out by hi-fi+ as a remarkable piece of miniaturisation and craftsmanship.

The HPA-23RM combines RCA and 3.5mm analogue inputs, two purposefully differentiated headphone outputs, low/high gain, battery indication and USB-C charging in a very portable package. It can run from wall power, USB-C or its internal battery, making it more flexible than a conventional desktop-only analogue amplifier. There is no DAC, digital audio input, balanced connection or remote control, so it remains focused rather than fully featured.

At $3,000, reviewers agree that it is a substantial purchase for such a small amplifier. Even so, several conclude that its performance against larger and more expensive desktop designs makes the price defensible, and Soundnews considered it more compelling than its costlier sibling for most headphones. Passion for Sound is more qualified, finding it especially persuasive when transportability matters rather than clearly dominant among all similarly priced stationary options.