The Amp Ultra is a streaming integrated amplifier by WiiM that delivers 100 watts x 2 channels into 8 ohms and 200 watts x 2 channels into 4 ohms. It was released in June 2025. It is a 2-channel design using a Class D output stage. It has a built-in DAC (ESS ES9038Q2M), so you can play digital sources directly with no separate DAC unit needed. The WiiM Amp Ultra has an MSRP of $549.
There are 4 WiiM amplifiers in our database. Below you can see the main specs of these amps.
WiiM Integrated Amplifier Series
Performance Specs
One of the most important factors when deciding on an integrated amplifier is its power ratings and compatibility with your speaker's impedance requirements. The WiiM Amp Ultra is rated at 100 watts RMS into 8-ohms.
Here are the main highlights of its performance specs:
- 100 watts into 8-ohms
- 200 watts into 4-ohms
How loud will 100 watts actually play in your room? →
Which speakers suit the WiiM Amp Ultra?
100 W into 8 ohms, 200 W into 4.
We rank every passive speaker we cover against it on power, impedance safety and current
delivery.
Need more power?
WiiM Amp Ultra is rated at 100 watts into 8 ohms, which puts it in our 91 to 120 watts band. The next band up is 121 to 180 watts, which is worth about 1.5dB more output. That is a real difference in headroom on peaks, and a modest one in how loud the system plays - power and loudness are not the same thing.
Before buying watts, check what your speakers actually need: the amp and speaker matcher works it out from their sensitivity, impedance and your room. Plenty of systems are better served by the 61 to 90 watts band and better speakers.
When pairing the WiiM Amp Ultra with a passive Bookshelf (Stand mount) or Passive Floor Standing (Tower) speaker, you have to check if their Max Power Range is below the max wattage of the amp for the given impedance levels.
Operating your amp outside of this max range may damage the speakers.
Inputs and Outputs
Besides the performance specs of the WiiM Amp Ultra, the next important feature set that you have to evaluate is the input and output selections that it offers.
Inputs
Outputs
- Speaker Outputs
- Subwoofer Output (Mono RCA)
Bluetooth Connectivity
WiiM Amp Ultra features built-in Bluetooth 5.3 for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops.
Among the amps in the same price range, these are the 5 amps that have Bluetooth Connectivity:
Phono Input
WiiM Amp Ultra doesn't have a phono input so in order to play your vinyl albums, WiiM Amp Ultra has to be paired with a Phono Preamp that is MM (Moving Magnet) or/and MC (Moving COil) depending on your cartridge type.
DAC and Digital Music
The WiiM Amp Ultra's built-in DAC allows the connection of digital sources directly, eliminating the need for an external DAC. The DAC chip that is used in the Amp Ultra is the
ESS ES9038Q2M, and supports resolutions up to
24-bit, 192KHZ.
WiiM Amp Ultra Pros and Cons
Drawn from the published figures on this page, not from listening.
- ✓Power nearly doubles into a harder load, 100 watts into 8 ohms rising to 200 into 4, which points to a power supply with real current in reserve.
- ✓Class D output stage, so it runs cool and wastes little power as heat - which is how it fits in a small case.
- ✓Built-in DAC handling 24-bit / 192, so a TV, computer or streamer can connect digitally with nothing in between.
- ✓Digital inputs cover 1 optical and USB.
- ✓Streams over the network without a separate streamer: Spotify Connect and Tidal; Chromecast built-in and Roon.
- ✓Bluetooth (version 5.3) for playing straight from a phone.
- ✓Dedicated subwoofer output (Mono RCA).
- ✓At 202mm wide it fits where a full-size component will not.
- ✗Parts warranty is only 1 year.
WiiM Amp Ultra External Dimensions and Weight
WiiM Amp Ultra has external dimensions of (H x W x D) 3 x 7.9375 x 10.1875 inch (76.2 x 201.6 x 258.8 mm ). The unit weighs
2.4 kg (5.4 lbs).
Base Surface Area
Base surface area of an integrated amplifier may become an important decision factor when the space in your room or desk is limited.
The base area of the WiiM Amp Ultra is approximately 521.7cm2 / 80.9inch2.
- Width: 201.6mm (7.9375")
- Height: 76.2mm (3")
- Depth: 258.8mm (10.1875")
- Weight: 2.4 kg (5.4 lbs)
- Base Surface Area: ~521.7cm2 / 80.9inch2
- Volume: ~4.0 liter / 1.0 gallon
Warranty
1 Year of parts warranty and 1 Year of labor warranty is generally provided for the WiiM Amp Ultra by the manufacturer.
| General |
| Brand |
WiiM |
| Full Model Name |
WiiM Amp Ultra |
| Release Date |
June 2025 |
| Amplifier Type |
Integrated Amplifier |
| Number of Channels |
2 |
| Amp Class |
Class D |
| Amplifier Technology |
Solid State |
| Performance |
| Watts RMS per Channel into 8-ohms |
100 watts |
| Watts RMS per Channel into 6-ohms |
N/A |
| Watts RMS per Channel into 4-ohms |
200 watts |
| Frequency Bandwidth |
|
| THD |
|
| Minimum Impedance |
|
| Signal to Noise Ratio |
N/A |
| Digital Music |
| Built-in DAC |
Yes |
| DAC Specs |
ESS ES9038Q2M |
| Bluetooth |
Yes |
| WiFi |
802.11ax |
| Ecosystem |
| Apple AirPlay |
No |
| Apple AirPlay2 |
No |
| DTS Play-Fi |
No |
| Chromecast built-in |
Yes |
| Roon |
Ready |
| HEOS |
No |
| BluOS |
No |
| CONNECTIONS |
| Phono Input |
No |
| Optical Digital Inputs |
1 |
| Coaxial Digital Inputs |
No |
| USB Input |
1 |
| Headphone Output |
No |
| Removable Power Cord |
|
| PHYSICAL SPECS |
| Height |
76.2mm (3") |
| Width |
201.6mm (7.9375") |
| Depth |
258.8mm (10.1875") |
| Weight |
2.4 kg (5.4 lbs) |
| OTHER |
| Parts Warranty |
1 Year |
| Labor Warranty |
1 Year |