Overview

WiiM Amp Ultra is a streaming amplifier launched in June 2025, combining 200W at 4Ω Class-D amplification with an ESS ES9039Q2M SABRE DAC and a 3.5-inch touchscreen. It’s built on dual TI TPA3255 with post-filter feedback (PFFB), and integrates HDMI ARC, multi-room, Room EQ/PEQ, and Roon Ready support in a compact aluminum chassis. [2][3]

Scientific Validity

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Third-party measurements show transparent-class results at typical listening power: at 5W into 4Ω, SINAD ≈ 87 dB (THD+N ≈ 0.0044%), with flat frequency response (≈ ±0.1 dB 20 Hz–20 kHz). Continuous power meets ~100 W/8Ω and ~200 W/4Ω ratings. Manufacturer lists SNR 120 dB (A-weighted) and impedance range 2–8Ω; treat these as specs until independently verified. Overall, distortion and linearity clear the transparency thresholds; noise/crosstalk data are adequate in practice but less completely documented than distortion/power. [1][2]

Technology Level

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Premium ESS ES9039Q2M DAC, dual TPA3255 with PFFB, and multiple OPA1612 stages deliver modern, load-independent behavior. Software features include 24 preset EQs, 10-band PEQ, room correction, and broad protocol support, presented via a responsive 3.5-inch capacitive touchscreen with a customizable UI.

Cost-Performance

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Using the policy’s “cheapest equivalent-or-better” rule: the lowest-cost way to obtain the same functions (streaming with HDMI ARC, PEQ/room correction, touchscreen control) and measured performance (≥200 W/4Ω, THD+N ≤0.01%) is AIYIMA A70 (199 USD, manufacturer PFFB amp ≥200 W/4Ω) + WiiM Ultra (329 USD, streamer with HDMI ARC, PEQ/room correction, touchscreen) = 528 USD. Against the review target 529 USD, the ratio is 528 USD ÷ 529 USD = 0.998 → round to 1.0. Rationale: Ultra supplies the identical user-facing streaming/ARC/EQ/touchscreen set; A70 meets or exceeds output power and distortion specs. [4][5]

Reliability & Support

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Warranty is region-dependent (~1–2 years); firmware cadence is active with ongoing feature and stability updates across WiiM devices. Simple Class-D power stage and solid enclosure aid durability; software support history is favorable. [6][7]

Rationality of Design Philosophy

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Design choices (PFFB, high-performance DAC, integrated DSP/room EQ) directly target measured transparency while consolidating use-case friction (HDMI ARC, app control, touchscreen). Cost is focused on functions that move the measurement needle; no reliance on non-auditable “tweaks.”

Advice

Choose WiiM Amp Ultra when you want a single-box streamer/amp with HDMI ARC, room correction, and a front-panel touchscreen. If you’re comfortable with two boxes, WiiM Ultra + AIYIMA A70 achieves equivalent user functions and equal-or-better core measurements at essentially the same cost, trading integration for flexibility. [4][5]

References

[1] Erin’s Audio Corner, “WiiM Amp Ultra — measurements,” https://erinsaudiocorner.com/electronics/wiim_amp_ultra/ , published 2025-06-30 (5W SINAD, FR flatness, power).

[2] WiiM Amp Ultra — specs, https://www.wiimhome.com/wiim-amp-ultra/specs , accessed 2025-08-31.
— Shop All Products (MSRP listing), https://wiimhome.com/shop (Amp Ultra 529 USD; Ultra 329 USD), accessed 2025-08-31.

[3] WiiM Blog, “WiiM Amp Ultra is Now Roon Ready Certified,” https://www.blog.wiimhome.com/post/wiim-amp-ultra-is-now-roon-ready-certified , published 2025-07-17.
— Roon Labs Blog, “New Roon Ready Devices: July 2025,” https://blog.roonlabs.com/new-roon-ready-devices-july-2025/ , published 2025-07-26.

[4] AIYIMA A70 — official product page (PFFB, power), https://www.aiyima.com/products/aiyima-a70 , accessed 2025-08-31.
— AIYIMA Store (A70 price examples), https://www.aiyima.com/collections/all , accessed 2025-08-31.

[5] WiiM Ultra — price listing, https://www.audioadvice.com/products/wiim-ultra-digital-music-hub , accessed 2025-08-31.

[6] WiiM Help Center — WiiM Pro Firmware Release Notes, https://faq.wiimhome.com/en/support/solutions/articles/72000587188-wiim-pro-firmware-release-notes , modified 2025-08-20.

[7] WiiM Forum — WiiM Pro Firmware v4.8.726839 Update (Aug 20, 2025), https://forum.wiimhome.com/threads/wiim-pro-firmware-v4-8-726839-update-aug-20-2025.7974/ ;
Gentec (Canada) — WiiM Warranty (1 year), https://www.gentec-intl.com/pages/service/wii-m-canadian-warranty ;
Russ Andrews (UK retailer) — WiiM Ultra “Warranty: 2 Years,” https://www.russandrews.com/wiim-ultra-streamer/ .

(2025.9.1)