•Martin Logan Expression ESL 13A 落地式揚聲器 規格表

頻率響應 24–23,000 Hz ±3dB 水平擴散 30° 垂直擴散 44" (112cm) line source 高頻換能器 ■ 面板尺寸 ■ 發聲面積 XStat、CLS、 electrostatic transducer ■ 44" × 13" (112 × 33cm) ■ 572 in2 (3,696 cm2) 低頻換能器 Two 10” (25.4 cm) cast bracket, high excursion, rigid aluminium cone with extended throw drive assembly, non-resonance asymmetrical chamber format 室內校正(低音部分) Anthem Room Correction (ARC) ready (Sold Separately) 功率 Woofer: 2 x 300 watts/channel (4 ohms), 2 x 600 watts peak 靈敏度 91 dB/2.83 volts/meter 阻抗 4 Ohms, 0.7 at 20kHz. Compatible with 4, 6, or 8 Ohm rated amplifiers.

推薦放大器功率 20-600 watts per channel 分頻點 300Hz 組件 Custom-wound audio transformer, air core coils, polypropylene capacitors. 24-bit DSP based preamplifier (used with woofer amplifier). 音頻控件 Bass: ±10 dB under 75 Hz Mid-Bass: –2 dB, 0 db, +2 db Light: On, Dim, Off ARC Room EQ: On, Off 燈光 LED intensity control: on, dim, off 輸入 AC Power, RJ45 (for ARC), mini USB (for ARC) 功耗 Idle: < 1W/channel Max: 500W/channel 重量 46.8 kg 外型尺寸 (高x寬x深) 156.1cm × 33.9cm × 69.9cm

Expression ESL 13A New Ultra-Rigid AirFrame Blade Design
Expression ESL 13A XStat panels are joined to their speaker cabinets using MartinLogan’s redesigned AirFrame Blade construction, precision manufactured from an aerospace-grade extruded aluminum alloy. This material, and this exclusive manufacturing process, makes the panels extremely rigid.

The bold, forward-moving styling of this AirFrame Blade rail system, narrow and strong in front, broad and forceful from the side, is a modern design statement. It never obstructs playable surface area or interferes with the panel’s dipole sound radiation pattern. It also provides electrical and acoustical isolation, minimizing intermodulation distortion caused by vibration and resonance. The flowing lines emphasize the groundbreaking integration of the panel itself with the compact woofer and amplifier section. The breathtaking AirFrame Blade design enhances imaging, low-level sonic detail, accuracy, and speaker efficiency. Curvilinear Line Source (CLS) Electrostatic Panel
CLS technology is an essential ingredient of every electrostatic loudspeaker we produce. Through our proprietary manufacturing method, we have built-in the panel’s gentle horizontal curvature. This unique design enhances the high frequency detail produced by the large radiating surface, without compromising overall sound quality. Notice how the gentle modern curve and perforation pattern gives way to the flat grille of the woofer section.

Controlled Dispersion Sound Radiation
The sound we hear from a loudspeaker is a combination of direct radiation from it to our ears, and reflections off of room surfaces—walls, floor, and ceiling. How our brains integrate this information is far from simple. Depending on the angle of incidence to the ears and the arrival-time difference between direct and reflected sound, reflections can either blur detail and stereo imaging, or enhance the natural impression of depth and openness.

Electrostatic panels, which are true dipole speakers, produce a nearly-ideal controlled dispersion radiation pattern. They send very little sound to the sides, thereby minimizing side-wall reflections, whose short arrival times tend to interfere with the perception of the direct sound. Their strong rear radiation, however, produces a generous amount of natural, ambience-enriching later-arriving mid- and upper register information.

New  PoweredForce Forward? Bass Technology
PoweredForce Forward bass technology combines two MartinLogan audio innovations: PoweredForce, which allows small enclosures to accurately produce massive amounts of bass, and ForceForward, which significantly reduces performance-robbing front-wall bass reflections.

PoweredForce Forward bass technology uses an advanced crossover topology with phase-timed woofers to minimize destructive reflected energy. By virtually eliminating front-wall bass reflections and working in tandem with the panel, PoweredForce Forward Bass Technology gives you more placement flexibility, and enhances the true audio realism of your sound source.

New More Performance, Versatility, and Safety, with WBT Binding Posts
Connect your electronics safely and securely using 5-Way audiophile WBT Binding Posts. Their pure copper connection plate is highly conductive and free from “eddy current” effects. These posts are insulated for shock protection, and fully damped against vibrations. They give you plenty of room for large-gauge professional speaker connections.

Precision-Built Advanced-Topology Vojtko Crossover
Vojtko Voiced, the advanced crossover and electronics in Expression ESL 13A add enhanced mid-range clarity to this artful composition. Carefully hand-built using only the finest polypropylene capacitors and air-core coils, the crossover employs MartinLogan’s proprietary Vojtko topology for vanishingly low distortion and seamless driver/ESL integration. This precision-tuned network preserves even the most microscopic sonic nuances while handling the full dynamics of any source.

We’ve also considered the signal you will feed your loudspeakers, and have engineered Expression ESL 13A to work well with practically any type of electronics. MartinLogan’s state-of-the-art toroidal transformer and electrical interface engineering ensure an absolutely transparent link from amplifier to electrostatic panel and woofer array. This produces sound of unparalleled purity, precision, clarity, and openness — the next best thing to no speaker at all.