Yamaha AST-S1 (активное сервоуправление)

Акустика AST-S1 в комплекте с усилителем AST-A10 и соответствующим картриджем AST-KS1. За счет активного управления НЧ динамиком обеспечивается невероятная полоса (в сторону низких частот) для такого компактного размера корпуса. Отлично подойдет в качестве акустики для ПК из-за компактного размера АС. Полагаю, что это единственный вариант для воспроизведения низких частот, если нет места. При габаритах 188х297х230мм полоса 28Гц-20КГц! В усилите нет ни чего лишнего, регулятор громкости и регулятор полосы со стороны НЧ, если комната будет сильно гудеть. Возможна продажа акустических систем отдельно от усилителя. Усилитель 100В, потребуется преобразователь 220->100. К примеру - Штиль АТ 220/100-0,4-50 "The first-ever active servo speaker system, using the new AST method to expand the limits of low-frequency playback." Widely used in Yamaha’s subwoofers and home theater products, the YST (Yamaha Active Servo Technology) method was originally developed to expand the low-frequency reproduction limits of HiFi speakers. Known as AST at the time, the YST method involves two technologies, one the Air Woofer, which emits the small amplitude sound waves within the cabinet from the port as large amplitude waves by adjusting the cabinet volume and port size to meet certain conditions, and the other Negative Impedance Drive, which drives the speaker to cancel the impedance of the voice coil so the apparent impedance of the speaker is zero, the former performed by a speaker and the latter by an amplifier. Released in 1989 as a set containing an AST-S1 dedicated speaker and AST-A10 dedicated amplifier with a combined product number, the AST-1 was the first active servo speaker system to utilize this AST method. Its dedicated speaker was even smaller than the NS-10M, a 16cm two-way mounted in an A4 size 6-liter capacity cabinet, and for a dedicated amplifier it had a thin two-channel power amplifier with line-level input. In its front panel it had a special cartridge slot for changing the amplifier’s operating characteristics according to the speaker, with a cartridge included with each speaker. The catalog was full of phrases straight out of a dream, such as, "28Hz playback that lets you listen to the fundamental of a piano’s lowest note, not its harmonics" and "Ultra-mega bass reproduction without having to fill your room with a giant speaker," but while the actual sound did not betray listeners’ expectations, the product’s planned double duty for both HiFi and AV use did not win the support of audiophiles. The component-type AST product line of speaker-amplifier sets stopped at the four speakers and two amplifiers already released that year. On the other hand, the Tiffany series of AST method built-in amplifier superwoofers and compact stereos that were released the same year were a hit, and the sublime GF-1 active speaker system released in 1991 with a superwoofer bearing the revised YST name earned good reviews for its sound quality.