

This served as the basis of Threshold’s amplifier line throughout the 1980s. In the late 1970s, Pass further developed his amplifier technology and Threshold began to market the STASIS line of amplifiers. The Threshold amplifiers drew the attention of audiophiles and editors at audio equipment magazines. When they were confident the amplifier was ready to market, Pass and Besne incorporated Threshold as co-founders in Sacramento, California on December 5, 1974. Besne worked on the industrial design of the amplifier while Pass worked on the circuit topology and component selection. Pass received his Bachelor of Science in Physics and with an ESS associate René Besne they together began development of a new amplifier in 1974. He also was a service manager for Sun Stereo performing repairs on McIntosh Laboratory, Phase Linear, Pioneer Corporation and other brands of amplifiers, and began formulating his own amplifier designs in 1974. Pass worked at ESS designing crossovers and enclosures through 1973. In 1972, he joined ESS speakers in Sacramento just prior to the arrival of Oscar Heil, who would design the Heil Air Motion Transformer which was a key component of the ESS AMT series of speakers. While a student, he founded PMA to design and manufacture speakers. Also for domestic mail, the following applies: postage, insurance costs for valuables, bulky or fragile goods are calculated individually and can also be subsequently requested.In the early 1970s, Nelson Pass was studying Physics at the University of California-Davis. The following variants are possible: Customer pickup, insured shipping, ordering a forwarding at the expense of the purchaser or completion of a single shipping insurance paid by the buyer. Other delivery forms can not be adequately insured. Minimum flat rate shipping within Germany is 12 € (Europe 25 € / Overseas 50 €), regardless of value or weight of each registered shipment! The purchaser shall bear all shipping costs and the shipping risk. The dispatch takes place principally in an insured package. For big pictures with glas note that we remove the glas for shipping. Freight forwarders and similar entrepreneurs are not vicarious agents of the Auctioneer. The auctioneer shall be liable only for damages, culpably caused by himself. The storage, disassembly, assembly and dispatch are at the expense and risk of the buyer.
