Mofi Electronics SourcePoint 10 Master Edition black (pack of 2)

Two additional years of development after the release of the original SourcePoint 10 in late 2022: that is the time Andrew Jones devoted to refining the crossover filter of this bookshelf speaker. The Master Edition retains the same 25 cm concentric driver and the same cabinet as the original model, but fundamentally rethinks the signal processing between the bass and treble. The result is a more precise speaker, better suited to its environment, and one that remains uncommonly easy to use in this price range.

A 25 cm concentric driver, and why that is rare

The most striking design choice of the SourcePoint 10 is its concentric driver: a 3.2 cm soft-dome tweeter housed at the center of a 25 cm paper pulp woofer. Both transducers emit from a single point, eliminating time offsets between bass and treble. The soundstage gains in coherence and the sweet spot widens, including vertically.

This type of two-way concentric arrangement is uncommon. Andrew Jones practiced it for a long time in three-way configurations at TAD and KEF, where a separate midrange driver handled the intermediate frequencies to limit the excursion of the central driver. At MoFi, he took the opposite approach: a single large transducer covers the bass and midrange, its 25 cm size allowing it to move the necessary air with minimal excursion. The paper cone also acts as a waveguide for the tweeter, which aligns the directivity of both transducers and improves tweeter efficiency in the lower part of its operating range.

The tweeter, with its wide-roll surround and large-diameter voice coil, can reach down to the crossover frequency of 1.6 kHz, a low crossover point that contributes to the smoothness of the transition between registers.

The Twin-Drive system: limiting distortion at the source

The driver’s magnetic motor is based on the Twin-Drive system developed by MoFi. Two high-energy neodymium magnets create a symmetrical magnetic field that eliminates flux modulation. The acoustic benefit is tangible: intermodulation distortion (IMD) drops to very low levels, meaning the driver generates little to no spurious frequencies absent from the original signal. Copper sleeves further reduce the non-linear inductance of the voice coil.

In practice, this translates into a clean, defined sound where instrumental timbres remain legible even during complex passages or at high volume.

The Master Edition crossover, the heart of the update

This is where the Master Edition sets itself apart from the original SourcePoint 10. The new crossover filter is mounted on two separate circuit boards and uses higher-quality components: polypropylene film capacitors, metal film resistors, and air-core inductors. The original filter used laminated steel-core inductors. Switching to air-core inductors reduces losses and core saturation, improving signal linearity and transparency.

MoFi states that these modifications allow for better integration between the woofer and tweeter, more precise phase alignment, and a lower noise floor. Impedance is also more linear than with the original filter, making the amplifier’s job easier.

A three-position selector (High, Mid, Low) is integrated into the filter to adjust the tweeter level by approximately ±1 dB. The Mid position corresponds to the neutral factory setting. High slightly boosts the treble in heavily damped rooms (thick carpet, curtains, upholstered furniture). Low attenuates it in reflective rooms (hard floors, bare walls, large bay windows). This adjustment is direct and lossless since it is an integral part of the filter circuit.

Owners of the original SourcePoint 10 can purchase the Master Edition filter as an upgrade kit installable with a simple screwdriver, which reflects a commendable approach on the part of the manufacturer.

A cabinet built for a 25 cm woofer

A driver of this size requires a substantial internal volume and a cabinet that does not vibrate. The top, bottom, and side panels are made of 25 mm thick MDF, clad in genuine book-matched wood veneer with a satin finish. The front baffle is made of 50 mm MDF, providing significant mass and rigidity at the precise point where the driver is mounted. Two internal braces connect the panels together to lock the structure.

The baffle is sculpted into several angled facets that reduce diffraction — the spurious reflections generated when a sound wave meets the edge of the baffle. On a conventional flat-baffle speaker, these diffractions color the reproduction and blur the stereo image. Here, the facets break up these reflections and allow the driver to radiate more evenly.

Two rear bass-reflex ports handle the woofer’s bass loading, with low-turbulence airflow. Foam tuning bungs are supplied to attenuate bass energy if the speaker must be placed close to a rear wall, within 60 cm. MoFi ideally recommends a clearance of at least 60 cm from both rear and side walls.

The speaker weighs 21 kg. At 57 cm tall and 37 cm wide, it is large for a bookshelf speaker and requires a sturdy stand. MoFi offers dedicated “Low Slung” stands that tilt the speaker slightly upward to direct the sound toward a seated listener.

An easy speaker to drive

With a sensitivity of 91 dB (2.83 V / 1 m), the SourcePoint 10 Master Edition draws a comfortable volume from any amplifier capable of delivering 30 watts or more. Its nominal impedance of 8 ohms (minimum 6.2 ohms) makes it a stable load that will not challenge a modest tube power amplifier. It works equally well with higher-powered transistor amplifiers, up to 200 W. This versatility broadens the range of possible pairings and allows the amplifier to be chosen on the basis of musicality rather than raw power.

Technical Specifications

Acoustic Configuration

• Type: 2-way bass-reflex bookshelf speaker
• 10-inch (25.4 cm) coaxial driver
• 1.25-inch (3.18 cm) high-performance soft dome tweeter
• Crossover frequency: 1.6 kHz

Performance

• Frequency response: 42 Hz – 30 kHz
• Nominal impedance: 8 ohms (minimum 6.2 ohms)
• Sensitivity: 91 dB (2.83 V / 1 m)
• Recommended power: 30 W minimum
• Maximum power: 200 W

Technologies and Innovations

• 10-inch (25.4 cm) coaxial driver
  • Two transducers forming a single sound source
  • Perfect coherence
  • Highly precise stereo imaging
  • Reduced distortion
• High-flux Twin-Drive system
  • Symmetrical magnetic field
  • Very low intermodulation distortion (IMD)
  • Faithful and natural reproduction
• Optimized Master Edition crossover with audiophile-grade components
  • Polypropylene film capacitors
  • Metal film resistors
  • Air-core inductors
  • Better coherence between frequency ranges
  • Optimized phase
  • More precise sound
• 3-position tweeter level selector
  • High: boosts treble (dampened rooms)
  • Mid: neutral balance (factory setting)
  • Low: softens treble (reverberant rooms)

Cabinet Design

• Ultra-rigid construction with multiple internal bracing
• Thick MDF, up to 2 inches (5.08 cm) at the front baffle
• Multi-faceted anti-diffraction baffle
• Fewer resonances and greater precision

Connectivity

• 5-way binding post compatible with bi-wiring

Finishes

• Satin walnut with grey grilles
• Satin black ash with black grilles
• Real wood veneer with furniture-grade symmetrical grain matching
• Magnetic grilles

Dimensions and Weight

• Dimensions with grille (W x H x D): 368 x 572 x 422 mm
• Dimensions without grille (W x H x D): 368 x 572 x 406 mm
• Weight: 21 kg per speaker

Listening Experience

• Wide and holographic soundstage
• Deep and dynamic bass
• Rich and natural midrange
• Detailed and controlled treble
• Excellent musical versatility

Compatibility and Pairing

• High sensitivity of 91 dB, easy to drive
• Compatible with tube and solid-state amplifiers
• Stable impedance

Recommended Uses

• High-end hi-fi systems
• Medium to large rooms
• Audiophiles seeking precision and musicality
• Critical and immersive listening