WiiM Amp Ultra: Performance Meets Precision

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We’re thrilled to introduce our most refined streaming amplifier yet, the WiiM Amp Ultra, a high-performance powerhouse built for discerning listeners. Encased in a sleek unibody aluminum chassis with a vibrant 3.5” glass touchscreen, it delivers 100W per channel at 8Ω or 200W at 4Ω, driving up to four passive speakers with stunning clarity and dynamics.

Built with audiophile-grade components, including the ESS ES9039Q2M SABRE DAC, dual TI TPA3255 amp chips, and six TI OPA1612 op-amps, Amp Ultra ensures ultra-low distortion and rich, detailed sound. Post Filter Feedback (PFFB) technology further enhances load-independent performance across all speaker types, delivering cleaner sound and improved amplifier control, especially for complex loads.

Key Features​

• Powerful Amplification
  • Delivers 100W per channel at 8Ω or 200W at 4Ω—easily drives up to four passive speakers with stunning clarity and dynamics.
• Audiophile-Grade Components
  • Features the 32-bit/384kHz ESS ES9039Q2M SABRE DAC, dual TI TPA3255 Class-D amp chips, and six TI OPA1612 op-amps for ultra-low distortion and rich, detailed sound.
• Post Filter Feedback (PFFB) Technology
  • Ensures stable, load-independent performance across all speaker types—delivering cleaner sound and improved amplifier control, especially with complex loads.
• Next-Gen Connectivity
  • Equipped with Wi-Fi 6E, Bluetooth 5.3 with LE Audio, and dual antennas for fast, stable streaming across all wireless protocols.
• Elegant Touchscreen Design
  • Housed in a premium unibody aluminum chassis with a vibrant 3.5” glass-covered touchscreen for intuitive control and stunning aesthetics.
• RoomFit Room Calibration Built-In
  • Advanced room correction technology analyzes your space and customizes output for speakers and subwoofer to optimize soundstage and tonal balance.
• Exceptional Sound Performance
  • Achieves -105 dB THD+N and 120 dB SNR at 5W—ideal for high-fidelity playback across any genre or setup.
• All-in-One Streaming Hub
  • Stream music, podcasts, audiobooks, and internet radio in Hi-Res up to 24-bit/192kHz directly to your speaker system.
• Universal Music Service Support
  • Seamless access to Spotify, Amazon Music, TIDAL, Qobuz, Deezer, Pandora, iHeartRadio, TuneIn, and more via the WiiM Home App.
• Cast with Ease
  • Supports Google Cast, Alexa Cast, DLNA, Spotify Connect, TIDAL Connect, DLNA, and Roon (certification pending) for effortless playback from your favorite apps.
• Flexible Input Options
  • Connect turntables, TVs, or other sources and broadcast audio wirelessly across your multi-room system.
• Cinematic TV Audio
  • HDMI ARC, Dolby Digital decoding, and dedicated subwoofer output bring immersive home theater sound to your living room.
• Smart Voice Control
  • Works with Alexa, Google Assistant, and the WiiM Voice Remote for hands-free playback and system control.
• Customizable EQ
  • Fine-tune your audio with parametric and graphic EQs tailored to your own preference.
• Future-Proof Experience
  • Receive ongoing firmware updates with new features, services, and performance enhancements.
• Home Theater Integration:
  • Functions as the front, surround or center channel speaker in a Dolby 5.1 setup
• Smart Preset
  • Streamlines the listening experience by offering quick access to frequently used content and settings.
• Alarm Clock
  • Set the alarm time, occurrence, and choose from various music sources.

Versatile Connectivity & Streaming​

Amp Ultra integrates seamlessly into stereo setups and home theaters. With Wi-Fi 6E, Bluetooth 5.3 with LE Audio, and HDMI ARC with Dolby Digital decoding, it adapts to both wireless and wired configurations, making it perfect for immersive entertainment.

Streaming is effortless with Spotify, Amazon Music, TIDAL, Qobuz, Deezer, Pandora, iHeartRadio, TuneIn, and more via the WiiM Home App. Users can cast audio from their favorite platforms, including Google Cast, Alexa Cast, DLNA, Spotify Connect, TIDAL Connect, and Roon, ensuring seamless playback across devices.

Smart Home Audio Control​

With multi-room sync, automatic room calibration, and customizable EQ settings, Amp Ultra ensures tailored sound across any space. The WiiM Home App, Alexa, Google Assistant, and the WiiM Voice Remote 2 provide effortless control over playback, sound tuning, and system settings.

A 3.5” glass-covered capacitive touchscreen allows users to directly adjust playback, browse album art, access EQ settings, switch inputs, and view their queue, with additional features like VU meters, presets, and custom wallpapers to personalize the listening experience.

Designed for Cinematic & High-Fidelity Listening​

Amp Ultra takes home entertainment to another level. HDMI ARC, Dolby Digital support, and a dedicated subwoofer output transform movies into cinematic experiences, while home theater integration allows it to function as a front or surround speakers in a Dolby 5.1 setup.

Its precision-machined unibody aluminum build enhances durability while maintaining a modern, sophisticated aesthetic, measuring 7.9” x 2.9” x 7.9” and weighing 5.4 lbs.

Future-Proof & Always Improving​

Regular firmware updates will introduce new features, services, and performance enhancements, keeping Amp Ultra at the leading edge of streaming amplification.

Pricing & Availability​

WiiM Amp Ultra, bundled with the WiiM Voice Remote 2, will be available Q3 2025 on Amazon and select retail partners. Stay tuned for pricing details, we'll announce them when the product becomes available. For more details, visit www.wiimhome.com.

 

[canard]

With mine KEF LS3/5A the Vibelink is not as cold as they say...
In fact I keep it next to the Ultra and not underneath.

but not a story of low impedance...because the subject is rather the opposite...an announced impedance of 11 or 15 ohms...

 

[HansD-NL]

With mine KEF LS3/5A the Vibelink is not as cold as they say...
In fact I keep it next to the Ultra and not underneath.

Ouch yes, low sensitivity and high impedance speakers like that need fairly high current when you want some volume. That gets many not so capable amps on their knees and will drive others that can do it warm/hot.

 

[canard]

Small 13cm closed... BBC announced 25W admissible... with memory 82 or 83 sensitivity... so... ;-)
(which was not inconsistent with their original use...control bus regie... )

 

[Ivan]

Yes, high impedance, low sensitivity.
The little bustards want a lot of current.
The Vibe can handle them, and i have seen many amps of various brands go into crisis, over the years and in many listening tests.

 

[slartibartfast]

Yes, high impedance, low sensitivity.
The little bustards want a lot of current.
The Vibe can handle them, and i have seen many amps of various brands go into crisis, over the years and in many listening tests.

How does high impedance go with wanting a lot of current?

 

[canard]

Yes, high impedance, low sensitivity.
The little bustards want a lot of current.
The Vibe can handle them, and i have seen many amps of various brands go into crisis, over the years and in many listening tests.

Not quite the point either... with these TI chips, it's the FR behavior when increasing frequency, etc., that poses problems with more impedances. The PFFB is there to delay the problem... without completely making it disappear...

PS I've often asked if someone curious could do a simple test under 16 ohms and not just 4 or 8 ohms... (not even a complex load)..

It's nonsense, knowing that, to test only at 4 or 8, when you know the number of circumstances where the impedance rises well above 8 ohms.
;-)

 

[canard]

How does high impedance go with wanting a lot of current?

never heard of amps burning out on ls...disappointing yes...but not burning out
;-)))

 

[Ivan]

Goes that if you want to make them sound good you have to give them Watts.
The high impedance is not enough to compensate the very low sensitivity, and also the charge is very different and changes so you need quite a muscular ampli.
I've had them for 30 years, and I've owned also the same from Harbeth and Spendor. All the same...

 

[Vitus]

Hi, Does anyone know if USB is an input for digital media (flash drive) or an output for a headphone DAC/amp?

 

[hgo58]

Hi, Does anyone know if USB is an input for digital media (flash drive) or an output for a headphone DAC/amp?

The Ultra USB can be used for both digital media input (flash or hard drive) and for output to DACs. You will need a USB hub if you want multiple devices connected.

 

[HansD-NL]

Hi, Does anyone know if USB is an input for digital media (flash drive) or an output for a headphone DAC/amp?

It has both those functions

 

[harkpabst]

Hi, Does anyone know if USB is an input for digital media (flash drive) or an output for a headphone DAC/amp?

As others have confirmed: USB media and USB out.

The answers on ASR were spot on correct.

 

[adias]

Amp Ultra User Experience here - https://forum.wiimhome.com/threads/wiim-amp-ultra-experience.7519/

 

[LucAce]

Hi, Does anyone know if USB is an input for digital media (flash drive) or an output for a headphone DAC/amp?

Yes, input for digital media (flash drive) and an output for a headphone DAC/amp.

 

[harkpabst]

With mine KEF LS3/5A the Vibelink is not as cold as they say...
In fact I keep it next to the Ultra and not underneath.

The case getting warm (or even "hot") is not an indication of bad thermal management, though. The case is the actual thermal interface to the ambient air. When the amp is pushed hard, it better should warm up noticeably. Also, we really must talk measured temperature at a reasonably well defined output scenario. What already feels hot to some may be considered slightly warm by others.

These TPA3255 chips are really, really tiny. The exposed thermal pad is just about 4.4 x 7.3 mm. These Class D chips might be very efficient, but the amount of energy to be transferred per square millimetre is rather high. Getting the heat away from the chips effectively is of major concern for all manufacturers. It's not so much a problem of the amount of thermal energy, but to avoid local overheating.

Many of the cheap desktop amps don't excel in this field. The better designs like e.g. 3e Audio use massive heat transfer spacers to couple the chips to the case. WiiM went the extra mile and implemented an advanced heat pipe solution for the Vibelink Amp and the Amp Ultra.

The little bustards want a lot of current.

High impedance actually means rather low current. Close to 100% of all Hi-Fi power amplifiers are of the constant voltage type (aiming at a close to zero output impedance). The higher the load impedance, the lower the current. LS3/5A are still a difficult load, but not in the sense that they need a lot of current. The maximum output voltage the Vibelink Amp is capable of is roughly 28 V. If we make the simplifying assumption that the LS3/5A impedance is 10 ohm (or even higher) this is equivalent of a maximum output current of 2.8 A (or even less), which is not an awful lot.

The Vibe can handle them, and i have seen many amps of various brands go into crisis, over the years and in many listening tests.

The Vibelink Amp has no problems driving complex loads and is thermally stable. This is a good proof.

 

[Vitus]

Thank you all for your reply.