PIONEER S-HE10 (1992) | High-Sensitivity Bookshelf Speakers

 

The Pioneer S-HE10 is a rare example of a high-efficiency bookshelf speaker engineered with the philosophy of professional monitor design. Built around advanced wavefront control and compression horn technology, it prioritizes realism, speed, and precise sound imaging over raw sound pressure. Rather than chasing volume, Pioneer focused on sensitivity and efficiency—key attributes of a true electro-acoustic transducer. The result is a speaker capable of reproducing the finest musical nuances, from a performer’s breathing to the natural decay of a concert hall, with remarkable clarity and presence. At the heart of the high-frequency system is a rear-type compression driver, the same principle used in TAD and EXCLUSIVE reference models. A precision titanium diaphragm works with an equal-length phase plug to ensure excellent phase coherence and extended high-frequency response. The newly developed oval wave horn, integrally molded with the front duct and angled at 10 degrees, directs sound inward toward the listening position. This design improves center image focus while offering wide horizontal dispersion, creating a stable soundstage and a generous listening area. The die-cast aluminum horn ensures exceptional rigidity and eliminates horn-induced coloration. The S-HE10 takes wavefront control to a higher level by optimizing: Time alignment between woofer and tweeter, Directivity matching across frequencies, Electrical phase coherence, Baffle geometry to reduce diffraction. By shaping the wavefront closer to a point source, the speaker achieves natural sound propagation, accurate image placement, and a convincing three-dimensional sound field. The woofer employs a newly developed ALCC (Alginate Composite Cone) diaphragm. Using alginate fiber derived from seaweed as a binder, Pioneer achieved superior bonding between high-strength polyarylate fibers and pulp. Compared to conventional paper cones, the ALCC diaphragm offers higher rigidity, greater internal damping, and lower mass. With an impressive sensitivity of 98 dB/W/m, the woofer delivers fast transients, excellent dynamics, and finely textured mid-bass reproduction. A magnetically shielded double-magnet circuit produces a high magnetic flux density of 14,300 gauss, ensuring strong diaphragm control and high efficiency. The T-shaped pole piece creates symmetrical magnetic flux, maintaining linearity even at high excursion levels. The S-HE10 features a generous 72-liter enclosure, enhancing low-frequency depth and authority. Its left/right symmetrical construction ensures precise stereo imaging, while rounded baffle edges minimize diffraction effects. The cabinet is built from high-density particle board and finished in an elegant dark reddish-brown quince tone, combining acoustic performance with understated luxury. Large, precision-machined speaker terminals support banana plug connections, ensuring reliable, low-resistance signal transfer. Specifications: Type: Phase-inverting bookshelf | Speaker type: Woofer: 25cm cone type x 2, Tweeter: 3cm compression driver + slant angle oval wave horn | Impedance: 6 ohm | Frequency response: 35-30,000Hz | Output SPL: 98 dB/W (1m) | Crossover frequency: 2,000 Hz | Maximum input: 120W (EIAJ) | Dimensions: 380 (W) x 680 (H) x 410 (D) mm | Weight: 28.1kg

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Panasonic CQ-TX5500D (2002)

 

The Panasonic CQ-TX5500D is 2-DIN car audio head unit with CD player, FM/AM tuner, CD/MD changer control. It is equipped with a 45W x 4ch power amplifier for high-quality sound. With a beautiful face plate design with a rich texture and machined aluminium knobs combine luxury with ease of use. Additionally this is a car audio product that uses military-grade compact vacuum tubes. The vacuum tubes help to smooth out the harsh, rough sound quality that is characteristic of digital audio. This is a masterpiece that makes you feel that way. 

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MITSUBISHI E-404 (1984) | Hearing is Believing

What separates the Mitsubishi E-404 from conventional systems isn't the fact that it includes a digital audio disc player, or a linear-tracking programmable turntable, or a dual-transport cassette recorder, or, for that matter, a digitally-synthesized tuner/receiver with graphic equalizer. No, what makes this system unlike any other is a full-function wireless remote control, providing total access, total control of an astonishing number of operations, all from the comfort of your easy chair. The E-404's detachable control panel, called appropriately enough the System Commander, integrates the convenience of infrared remote control with the intelligence of micro-processor technology. (The result is not unlike having a computer run your stereo for you.) With the System Commander cradled conveniently in your lap, you can select a "program" of up to 9 cuts from the phonograph. Or you can punch in a 9-selection program from a pre-recorded audio cassette. And from the compact disc, you can choose a program of another 9 selections. From any of these sources, you can pick your selections to play in any sequence you wish-last cut first, first last, whatever. You can even arrange to have a program of up to 9 selections recorded on a blank cassette, each cut evenly spaced for professional sounding results. Though the possibilities presented by the E-404 may at first seem overwhelming, its operation is, in fact, quite simple. Selections are entered via the System Commander touchpad. When a command is given, the function requested is visually displayed on the tuner/receiver, accompanied by an affirmative "beep" response (if a mistake is made, two "beeps" are sounded). Once the E-404 has been programmed, playback is fully automatic, randomly selecting the cuts you've chosen from the source you've chosen-be it phono, cassette, or compact disc. Hearing is Believing. If you're impressed by what the E-404 can do, you'll be equally impressed by how it does it. The E-404 is designed to interface with a personal computer. It even offers a self-test program that lets you know if every function is performing properly. The AM/FM stereo receiver, delivering 35 watts minimum RMS per channel, offers auto search with 18 station presets. The compact disc player employs a three-beam optical pickup (in place of the conventional single beam) ensuring stable, error-free tracking. Its speakers are three-way bookshelf type capable of frequency response from 40 to 25,000 Hz. The E-404's twin cassette decks feature Dolby® B noise reduction with logic-controlled transport and cassette-to-cassette dubbing at double speed.

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