Pioneer HPM-150 Restoration - Disassembly скачать в хорошем качестве

Pioneer HPM-150 Restoration - Disassembly

Part 1 of restoration: Chapter 1 - Introduction of restoration Chapter 2 - Disassembly and getting ready for cabinet restoration high gloss finish of walnut veneer re-sprayed black front and top re-sprayed brown rear set of extra castor wheels clean Super Tweeter new crossovers with all new parts attached in cabinet new internal wiring new high quality banana binding posts extra damping material Pioneer HPM-150 Restoration – Part 1: Disassembly - http://audiotweak.net/2015/03/07/pion... Pioneer HPM-150 Restoration – Part 2: Crossover - http://audiotweak.net/2015/08/08/pion... Pioneer HPM-150 after full restoration and upgrade - http://audiotweak.net/2015/04/20/pion... Pre- Star-Wars-ish looks for a surpising loudspeaker topped with an HPM (High-Polymer-Mylar film) super-tweeter for a 270° dispersion of the frequencies above 8,5Khz The HPM-150 was designed by Bart Locanthi, formerly of JBL. A suprising move from a brand which made its reputation on loudspeakers but it proved a wise one. For from the HPM series evolved a new Pioneer division, still active and successful today : TAD (Technical Audio Devices), a specifically pro-oriented sub-brand chosen by most serious studios for monitoring needs. Bass driver 40cm housed in aluminium diecast basket, wooden pulp & carbon fibers cone, long throw voice coil. Mid driver Rather small in size not to "upset the precisely calculated directionality characteristics", powered by a large magnet, edgewise voicecoil winding, "newly developed" light & rigid cone material, diecast aluminium frame and a "special design to assure substantially improved acoustic power handling, sufficient sound pressure and wide dynamic margin". High driver an acoustically compatible epoxy resin bonds the coil and cone to help increase rigidity ; aluminium diecast frame. Super-high driver Horn-loaded High-Polymer omnidirectional super-tweeter ; 3" cylindrical diaphragm loaded on a "five vertical-sectoral horns so that efficiency is improved by as much as 6dB in horizontal plane without loss of vertical directivity". Enclosure 3cm chipboard baffle (top, front, bottom), 2cm chipboard sides and top for "optimum acoustical properties". Computer-assisted resonance analysis and "hard-headed practical experience" for the design of the bass-reflex port. The top of the HPM-150 is made of four wooden poles which support an unbreakable smoked glass and acoustically transparent cloth. Despite its somewhat "dated" looks, the HPM-150 is one of the milestones in dynamic loudspeakers, the kind one always comes back to - like a Technics SB-7000. The HPM-150 (and the HPM series at large) is however part of those which made far more mousse outside Japan like an RT-707 or SX-1250 and remaining available in the US or Germany beyond 1980. Music: Perspectives by Kevin MacLeod ---------------------------------------­----- Check out and/or follow me on evil social media or just be creative :) Web: https://www.martenelectric.cz/ Blog: https://mniec.wordpress.com/ Facebook:   / martenelectric   Instagram:   / martenelectric   Twitter:   / martenelectric   YouTube:    / martenelectric   Odysee: https://odysee.com/@martenelectric:9 If you want to support my work please consider a donation via:   / martenelectric   - Patreon https://ko-fi.com/martenelectric - Ko-Fi https://www.ebay.co.uk/usr/martenelec... - eBay shop Video is not sponsored Out of respect to wide variety of people who watch my videos, I will remove comments that do not follow common standards of politeness and decency. Thanks for watching!