DIY апполитто

Для "акустического подвеса" (разновидность ЗЯ) значительно выше требования к качеству и стабильности параметров ГГ, а также к рассчётам и изготовлению корпусов. Проще говоря - нетрадиционный ("unmatched") ФИ гораздо дешевле.  

Acoustic Research, Inc. (“AR”) was founded in 1952[1] and incorporated on August 10, 1954 by audio pioneer, writer, inventor, researcher and audio-electronics teacher Edgar Villchur and his student, Henry Kloss. AR was established to produce the $185 model AR-1, a loudspeaker design incorporating the acoustic suspension principle based on patent US No. 2,775,309, granted to Edgar Villchur and assigned to Acoustic Research in 1956.
[edit]Technical innovation
Edgar Villchur's technical innovation was based in large part on scientific as well as objective testing and research, making most of it publicly available as documents, specifications, and measurements—all of which was then new in the loudspeaker industry. Acoustic Research, under Villchur's leadership, was also innovative during this period in the way the company offered equal opportunity, liberal employee benefits, insurance, and profit sharing to every employee.
[edit]Acoustic suspension loudspeaker
The acoustic suspension woofer provided an elegant solution to the age-old problem of bass distortion in loudspeakers caused by non-linear, mechanical suspensions in conventional loudspeakers. The acoustic suspension woofer (sometimes known as “air suspension”) used the elasticity of air within a small, sealed enclosure of about 1.7 cu ft (48 L) to provide the restoring force for the woofer cone. The entrapped air of the sealed-loudspeaker enclosure -— unlike the mechanical springs of conventional speakers—provided an (almost) linear spring for the woofer's diaphragm, enabling it to move back and forth great distances (“excursion”) in a linear fashion, a requirement in the reproduction of deep bass tones. The disadvantage of this arrangement is low efficiency; since the restoring force is large with a large woofer in a small cabinet, the cone must be massive to keep the resonant frequency in the required low bass region. The AR-1s were about a factor of 10 less efficient than other (physically much larger) existing speakers with the same bass response[2], but since higher power amplifiers were becoming available about the same time, this was a reasonable trade-off to get good bass response from a relatively small speaker.
As such, the AR-1 set new standards of low-frequency performance and low distortion that were unsurpassed for many years; in fact, some of the best loudspeakers available fifty-two years later continue to use the acoustic suspension principle for highest quality, low distortion bass reproduction. The small size of the high performance AR-1 (permitted by the acoustic suspension design) was a dividend that helped usher in the age of stereophonic sound reproduction. Two bookshelf-sized loudspeakers were far more acceptable in a living room than the two refrigerator-sized boxes previously necessary to reproduce low frequency bass notes.
By March 1957, AR began shipping a smaller, less expensive, acoustic suspension system, the US$87 Model AR-2. The AR-2 was selected by Consumer Reports as a 'best buy' and the company's sales went from $383,000 in 1956 to nearly $1,000,000 by the end of 1957. Also that year, co-founder and Vice President Henry Kloss left AR to form a new loudspeaker company, KLH.

Аааа, это ас с какой-то адски низкой чуйкой?
В 10 раз менее эффективные-нефиговый расклад.

Думал-думал и решил, что корпус буду делать сам.
19 мм фанеру уже нашёл, подыскиваю мастерскую для распила.