The Amp Pro is the quiet one. WiiM took the original Amp platform and rebuilt the signal path around an ES9038 SABRE DAC and post-filter feedback amplification, so background hiss sits far below the music even on sensitive speakers.
It suits a lounge where television and music share the same pair of speakers. HDMI ARC accepts Dolby Digital 5.1 soundtracks from the TV, and a dedicated output hands the low end to a subwoofer when the room has one.
Control runs through the WiiM Home app, with Alexa and Google Assistant both supported, and the upgraded wireless platform keeps streaming stable even in a flat full of competing networks.
For official product information and current support resources, visit the WiiM Amp Pro product page.
| ITEM | DESCRIPTION |
| Main Features | |
| Post-filter feedback output | Feedback taken after the output filter holds performance steady whatever speakers are attached. |
| Two-way Bluetooth | Sends audio to Bluetooth headphones as readily as it receives a stream from the phone. |
| USB in and out | A storage drive full of music plays directly, and the USB output feeds an external DAC digitally. |
| Multiroom grouping | Joins other WiiM streamers, amplifiers and speakers so one playlist can run the whole house. |
| DETAIL | VALUE |
| Product Specifications | |
| Output power | 60 Watts/channel at 8 ohms; 120 Watts/channel at 4 ohms |
| Amplification | Class-D with PFFB (Post-Filter Feedback); TI TPA3255 |
| DAC | ESS ES9038 Q2M SABRE |
| Total harmonic distortion (THD+N) | -105 dB (0.0005%) at 5W |
| Signal-to-noise ratio (SNR) | 120 dB (A-weighted) |
| Inputs | 1 × HDMI ARC (stereo PCM and Dolby Digital; DTS not supported); 1 × optical, up to 192kHz/24-bit; 1 × RCA line-in (2 Vrms, digitised up to 192kHz/24-bit); USB storage (FAT32, NTFS, EXT4) |
| Outputs | Passive speaker terminals (banana plugs, L and R); subwoofer out (2.0 Vrms); USB out (UAC 2.0, up to 192kHz/24-bit) |
| Network and wireless | Wi-Fi 6 (upgradeable to Wi-Fi 6E via software update); 10/100Mbps Ethernet; Bluetooth 5.3, two-way |
| Streaming protocols | Google Cast Audio, Spotify Connect, TIDAL Connect, Alexa Cast, DLNA, Squeezelite, Roon Ready (AirPlay 2 is not supported) |
| Voice control | Alexa, Google Assistant |
| Power input | 100-240V AC, 50/60Hz, 4A max |
| Dimensions | 190 × 190 × 63 mm (7.48 × 7.48 × 2.48 in) |
| Weight | 1.84 kg (4.1 lbs) |
| Package Contents | |
| In the box | 1 × WiiM Amp Pro; 1 × WiiM Voice Remote; power, HDMI, RCA and optical cables (1.5m each); quick start guide |
The Martin Logan Motion Foundation B2 is the largest bookshelf speaker in the Motion Foundation range, a stand-mounted stereo pair for listeners who want a full musical picture without giving floor space to towers.
Its character starts at the top. A Gen2 Folded Motion tweeter sits in a dedicated waveguide designed for controlled dispersion, so treble is aimed into the listening area rather than scattered around the room.
Beneath it, an aluminum mid/bass cone draws on technology carried down from the Motion XT and Motion Series. A McCracken-Vojtko crossover joins the two drivers, giving voices and instruments a single, continuous presentation from one cabinet.
Rear-ported cabinets carry grilles held by stealth mounting tabs, so they stay put without visible fixings. Paired with the matching STAND25, the speakers get a dedicated home at listening height and a clean, finished look in the room.
MartinLogan Foundation B2 official product page
| ITEM | DESCRIPTION |
|---|---|
| Gen2 Folded Motion Tweeter S | Folded diaphragm tweeter mounted in a Folded Motion waveguide. |
| Controlled Dispersion | Treble directed into the listening area for a steadier stereo image. |
| Aluminum mid/bass driver | Cone technology carried down from the Motion XT and Motion Series. |
| McCracken-Vojtko crossovers | Crossover design that joins tweeter and mid/bass driver. |
| Secure-Lock grilles | Stealth mounting tabs hold the grilles securely in place. |
| STAND25 compatible | Fully compatible with the matching MartinLogan stand. |
| DETAIL | VALUE |
|---|---|
| Tweeter driver | 0.94" x 1" (2.4 x 2.5cm) Gen2 Folded Motion® Tweeter S with 3.5 in² (22.6 cm²) diaphragm |
| Mid/bass driver | 6.5" (16.5cm) aluminum cone with stamped steel basket; non-resonant asymmetrical chamber format; unibody cone construction |
| Frequency response | 42 Hz - 23 kHz ± 3 dB |
| Sensitivity | 90 dB |
| Impedance | 5 ohms |
| Recommended amplifier power | 15 - 100 watts |
| Crossover frequency | 3,800 Hz (2-way) |
| Tweeter dispersion (H x V) | 90° x 90° |
| Cabinet | Rear Ported |
| Binding post inputs | 5-way Binding Posts (Non Bi-Wire) |
| Finishes | Black with Gunmetal trim, Satin White with Silver trim, Walnut with Bronze trim |
| Dimensions (H x W x D) | 15" x 7-3/4" x 11-1/2" (38.1cm x 19.7cm x 29.2cm) |
| Weight | 15lbs / 6.8kg |
| ITEM | QUANTITY |
|---|---|
| Foundation B2 loudspeaker | 2 |
| Secure-Lock Grille | Included |
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