MartinLogan Motion Foundation B1 Bookshelf Speakers (Satin White, Pair)
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MartinLogan Motion Foundation B1 Bookshelf Speakers (Satin White, Pair)
Compact in size, captivating in sound — the MartinLogan Motion Foundation B1 is the entry point into MartinLogan's celebrated Motion Foundation series, and it makes no compromises where it counts. At its heart sits MartinLogan's iconic Folded Motion® tweeter, a technology derived from their flagship electrostatic designs, delivering the kind of airy, precise high-frequency detail that transforms a good recording into a great listening experience.
Paired with a purpose-built 4" aluminium cone woofer and a rear-ported bass-reflex cabinet, the B1 punches well above its weight class — whether mounted on stands in a dedicated stereo setup, used as surround speakers in a home theatre, or tucked neatly onto a bookshelf. The Satin White finish keeps things clean and contemporary. Sold as a matched pair.
Key Features
- Folded Motion® Tweeter — ultra-low mass diaphragm for fast transient response and exceptional clarity in the high frequencies
- 4" Aluminium Cone Woofer — rigid, lightweight cone for accurate and dynamic midrange and bass reproduction
- Bass-Reflex Enclosure — rear-ported cabinet design extends low-frequency output and improves efficiency
- Wide Frequency Response — 80 Hz to 20 kHz (±3 dB) for full musical reproduction from a compact cabinet
- 4 Ohm Nominal Impedance — compatible with a wide range of stereo amplifiers and AV receivers
- Magnetically Attachable Grille — tool-free grille removal for a refined, uncluttered aesthetic
- 5-Way Gold-Plated Binding Posts — accepts bare wire, banana plugs, and spade connectors
- Satin White Cabinet — sleek finish that integrates beautifully into modern living spaces
Specifications
| Specification | Value |
|---|---|
| Tweeter | Folded Motion® (0.9" × 1.4" radiating area) |
| Woofer | 4" Aluminium Cone with Non-resonance Basket |
| Frequency Response | 80 – 20,000 Hz (±3 dB) |
| Sensitivity | 90 dB / 2.83V / m |
| Nominal Impedance | 4 Ohms |
| Recommended Amplifier Power | 20 – 100 Watts per channel |
| Crossover Frequency | 3,200 Hz |
| Crossover Topology | 2nd-order electro-acoustic |
| Enclosure Type | Bass-Reflex (Rear-Ported) |
| Dimensions (H × W × D) | 245 × 148 × 200 mm (9.6" × 5.8" × 7.9") |
| Weight (each) | 4.3 kg (9.5 lbs) |
| Finish | Satin White |
| Grille | Magnetically Attachable, Black Cloth |
| Binding Posts | 5-Way Gold-Plated |
| Sold As | Pair |
| MPN | MLFB1W |
| Google Product Category | Electronics > Audio > Speakers (ID: 249) |
Caring for your Speakers and Amplifiers
To Keep your equipment safe these are some best practices to note. Please be advised that this is only to reduce the risk of misuse and is not an exhaustive list.
Speakers
- Speaker terminals are marked red and black, ensure your amplifier to the speakers are wired on the same colours
- Ensure no loose speaker wire from the red touches a loose wire from the black as this will lead to a short circuit and damage either the speaker, the amplifier or both.
- Not all speakers are designed to play at max volume, kindly consider the pairing of your amplifier and speakers
- Speaker cabinets cannot be replaced please handle with care.
AV & Stereo Amplifiers
- If your amplifier has HDMI ports, ensure all devices are off before plugging in the HDMI cable
- Turn off the amplifier before swoping out or adding speaker cable
- Amplifiers generate heat, place them in a well ventilated space. if possible avoid having anything on top of the unit.
- adding a surge protector can assist with power dips which are likely to damage your devices. Isotek and Furman are industry standard.
- Dusty environments can sometimes lead to accumulation of dust in the electronic components that might affect heat regulation
Shipping & Returns
- Free shipping on orders over R500 within the country.
- Standard delivery within 2–5 business days. Delays will be communicated. This might vary slightly depending on your location.
- Return items in original condition for a full refund. (unopened state)
- Returns that are open/unboxed will be subject to a handling fee. Refunds will only be processed after testing the unit.