Niimbus US 5 PRO

Controls: Input select, independent headphone/line output enable, 256-step relay volume, balance, mute, pre-gain trim -18 to +24 dB, IR remote (milled aluminum remote included)

I/O: In: 3x analog stereo (2x RCA unbalanced, 1x XLR balanced). Out: 1x balanced headphone (4-pin XLR), 1x balanced headphone (4.4mm Pentaconn), 2x single-ended headphone (6.3mm jack), 2x line out (1x RCA unbalanced, 1x XLR balanced, switchable pre/post-fader, ±12 dB line-out adaptation)

Notable use: Flagship reference desktop headphone amplifier/preamp, top of the Niimbus "Ultimate Series"; direct successor/rename of the earlier Niimbus US 4+; marketed as audiophile hi-fi but built by pro-audio maker Lake People/Violectric and positioned by the manufacturer for demanding headphone loads incl. planar designs

Notes: PRICE: no USD price published on manufacturer's own site (cma.audio/violectric.de list EUR only: EUR 5,999 incl. VAT). USD price of $6,599 is from multiple independent US authorized dealers (audio46.com $6,599.00; digitaldjgear.com $6,599.99), internally consistent with EUR pricing at prevailing FX - used as the reported price_usd. FLAG: dimensions found only on a third-party US dealer page (hifisoundgear.com): 13.8 x 9.8 x 2.3 in / 35.1 x 24.8 x 5.9 cm, chassis only, weight not stated there; cma.audio's own page states weight 7.08 kg but no dimensions - not independently cross-confirmed, so dimensions/rack_units left out of structured fields pending verification (chassis height ~5.9cm is close to but not confirmed as a standard 1U rack form factor; no rack-mount kit mentioned). FLAG: frequency response figure differs between two independent US dealer listings for this same model (5Hz-250kHz ±0.5dB vs 0-200kHz) - likely reflects a spec-sheet revision between dealers; both reported in the field, neither can be confirmed against the manufacturer's own EN page (which does not publish a frequency-response number). FLAG: SNR (>129dB A-wt.) and THD (0.00063%) figures appear on a different dealer's US5-family listing but were not found on manufacturer's own page - omitted from structured numeric fields pending verification. FLAG: internal operating voltage stated as 60V on current cma.audio/violectric.de pages vs 50V in the original Aug-2021 audioxpress launch announcement - likely a running spec revision. FLAG: 'US 5 PRO' is the renamed direct successor to the discontinued Niimbus US 4+ (per audioxpress.com launch coverage); the old US4/US4+ product URLs on cma.audio now redirect to the homepage, confirming they are no longer current/orderable - excluded from this file per 'current models only' scope. No DAC module is offered for this model (pure analog signal path). Positioned as high-end/audiophile hi-fi rather than a strictly 'pro' studio tool, though the brand and manufacturer (Lake People/Violectric, cma audio GmbH) are pro-audio companies - flagged per prompt guidance on pro-vs-audiophile framing.