Description
The Motion 4i is a compact bookshelf speaker featuring a Folded Motion tweeter, a 4in paper cone woofer, and a proprietary Vojtko crossover network in an affordable gloss black package. A rear-firing Cascading Bass Reflex Port delivers surprisingly big bass from a remarkably compact enclosure, with flexible tabletop, on-wall, or upside-down high-wall mounting.
Features
- Folded Motion tweeter with low-mass diaphragm for vanishingly low distortion and fast response
- Rear-firing Cascading Bass Reflex Port for enhanced low-frequency output
- Proprietary Vojtko crossover network using custom air core coil inductors, low DCR steel laminate inductors, and polyester film/low-DF electrolytic capacitors
- Versatile placement: on speaker stands, shelf, or wall-mounted at two angles
- Can mount upside down for high wall placement
- Recessed push-style binding posts, accommodating banana jacks
- Gloss black finish with MartinLogan's signature perforated grille
Specifications
- Frequency response: 70–23,000Hz ±3dB
- Recommended amplifier power: 20–150 watts per channel
- Horizontal dispersion: 80°
- Vertical dispersion: 80°
- Sensitivity: 90dB/2.83V/meter
- Impedance: 4Ω, compatible with 4, 6, or 8Ω rated amplifiers
- Crossover frequency: 2,900Hz
- High frequency transducer: 1in x 1.4in (2.6cm x 3.6cm) Folded Motion transducer with 5.25in x 1.75in (13.3cm x 4.4cm) diaphragm
- Low frequency transducer: 4in (10.2cm) paper cone with stamped steel basket, non-resonant asymmetrical chamber, rigid structured dust cap, folded bass reflex port
- Components: custom air core coil and low DCR steel laminate inductors, polyester film capacitors in series, low DF electrolytic capacitors in parallel, system thermal/current protection
- Inputs: push style with banana jacks
- Weight: 6lb (2.72kg)
- Dimensions: 12.6in x 5.6in x 5.7in (32cm x 14.3cm x 14.5cm)