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US speaker specialist MartinLogan has just unleashed a new Active subwoofer, the Dynamo, that sports a fully active onboard 200-watt amp and 10-inch (25.4cm) aluminium-coned driver, but only costs £499.
Its compact, cube-like form ensures it is a discreet and practical addition to any environment, yet according to MartinLogan ‘the quality of its bass belies its diminutive dimensions’.
Those familiar with the MartinLogan brand may find this affordable little subwoofer somewhat surprising. The company is best known for its hi-tech take on electrostatic loudspeaker technology, yet the company’s research in this area has also led to the development of high-grade subwoofers. Electrostatic panels can deliver great quality higher up the frequency range, but at sensible sizes they can’t generate much bass depth. So MartinLogan has worked on full-range hybrid speakers that combine electrostatic panels for middle and high frequencies with coned bass drivers for the low stuff.
The Dynamo’s key elements include:
* Innovative Front-Firing or Down-Firing Option - To maximize performance when installed inside a cabinet or other custom installations, Dynamo's standard down-firing configuration is easily converted by the user into a front-firing configuration. A grill cover and 90° RCA adaptors are supplied with the subwoofer for use in front-firing applications.
* Inverse Mathematical Equalization - An IME (inverse mathematical equalization) filter is derived from the inverse of the unfiltered driver response. Precision IME filtering is reckoned to yield extremely accurate low-frequency response.
* Advanced Switching Amplifier - Dynamo's onboard amplifier belongs to the recently developed class of switch-mode designs that incorporate a variety of techniques to reduce noise, distortion and heat. In particular, the switching frequency is much higher than in typical subwoofer amplifiers of this type. It can produce 200 watts of continuous power.
* Simultaneous Connection for Two-Channel Stereo and Multichannel Home Cinema - Dynamo provides a direct, unfiltered LFE input for connection to surround processors, amplifiers and receivers with built-in subwoofer crossovers, as well as line- and speaker-level stereo inputs that connect to its internal crossover. The LFE and stereo inputs can be connected simultaneously, with separate level and crossover settings for each, enabling optimisation for home cinema and stereo music playback in the same system.
* Energy Transfer Coupler Spikes - The Dynamo is supplied with 1/4-20 MiniETC spikes, which can be used in place of the standard feet to enhance stability on thick carpets or to create tighter coupling between speaker and floor.
* Portless Enclosure - Although ports are a convenient and cost-effective way of increasing low-frequency output, they rely on resonant energy in a way that impairs bass quality. A good sealed system will exhibit less transient blurring while maintaining a smooth and consistent response, regardless of output level or voice-coil temperature.
homecinemachoice.com
