Test Bench: Eastech’s Punktkilde FSA044010-0802 1” Titanium Dome Tweeter

The transducer characterized in this Test Bench is from Eastech's Punktkilde line of home hi-fi drivers built in China and designed in Denmark by Scan-Speak engineers. The FSA044010-0802 is a recently released Punktkilde tweeter, featuring a 1” damped titanium dome diaphragm, dual magnet neodymium motor, a cast-aluminum anodized red faceplate (other colors are available), and an 8 ohm voice coil. This article was originally published in Voice Coil, September 2019.

For this Test Bench, Dickason characterizes the PD.124NR1, a new high power 12” neodymium driver from Precision Devices. The PD.124NR1 finds applications as a midbass driver in multiway systems or as a dedicated woofer bass reflex or horn-loaded designs. Its feature set is like most high performance pro sound drivers, fairly substantial. This article was originally published in Voice Coil, September 2019.

audioXpress' Technical Editor Jan Didden met with Bruno Putzeys and Lars Risbo, the founders of Purifi Audio, the new Danish company that the entire audio industry is talking about. The Netherlands Audio Engineering Society (AES) section invited the duo for a technical update on their plans, and they gracefully agreed to a presentation on June 13 at the Royal Conservatory of Music in The Hague, which Didden attended and reports here. This article was originally published in audioXpress, September 2019.

In this speaker review, Oliver Masciarotte and Kent Peterson (of Warkwyn) listen, measure, and listen again to the PureAudioProject Trio15 Heil AMT speaker system. This is a fascinating modular system, in this case designed using an ESS 6" Air Motion Transformer (AMT) and two Eminence 15" drivers, specifically optimized for use in open-baffle applications. This article was originally published in audioXpress, September 2019.

Following a first R&D article, where Norman Varney discusses the basic principles of unwanted vibrations in audio playback environments, in this second part he writes about what his research found to be effective ways to counteract those effects. The article details the evaluation process and extensive measurements that lead to the creation of various products that AV RoomService provides when helping clients with their acoustic problems. This article was originally published in audioXpress, September 2019.

Heading for the 2019 CEDIA Expo, where the Voice Coil team will be in full force, the September 2019 edition features an interesting overview of a new Multi-Driver Loudspeaker with Cross-Coupled Dual Wave-Columns patent, recently sold to Dolby Labs, and a close look at previous tapped wave-column design efforts. In Test Bench, Vance Dickason characterizes the new PD.124NR1 12” neodymium midbass driver from Precision Devices and from Eastech’s Punktkilde line, the FSA044010-0802, a 1” titanium dome tweeter. Voice Coil September 2019 is now available for download, together with all the industry news and updates.

The September edition of audioXpress is our always popular Speaker Builder - Speaker Focus edition. Once again, audioXpress focuses on loudspeaker building, design, and testing and for this issue we have combined two great DIY articles with a review of the PureAudioProject Trio15 Heil AMT speaker system. Ward Maas reports from the High End 2019 show in Munich, Jan Didden met with Purifi Audio's Bruno Putzeys and Lars Risbo and comments on the company's research, and much more.