Test Bench - Celestion CF1840JD 18” subwoofer

This Test Bench analysis discusses Celestion CF1840JD pro sound 18” woofer. The CF1840JD is a fairly high power handling woofer rated at 1,000 WRMS (AES standard), featuring a substantial ferrite finite element analysis (FEA) optimized motor assembly, an 18” Kevlar-loaded paper cone and large 5.5” diameter paper dust cap. This article was originally published in Voice Coil, December 2014.

Prepare for CES 2016 with the Voice Coil December 2015 issue, now available. In this issue, read how the Test Bench column has evolved, learn more about VocalZoom’s Laser Microphone, check the Microphone Capsule supplier directory and read about another audio patent granted to Apple. Learn more about two pro sound drivers as Test Bench focuses on the CF0617M 6.5” midrange driver from Celestion, and the 18iD woofer from Eighteen Sound.

This month’s edition features an overview of Acoustic Simulation of Audio Devices with Actran Software, Mike Klasco’s overview of Integrated Amplified Speaker Solutions and detailed Directory of vendors. James Croft reviews two related patents for a new type of subwoofer architecture. Test Bench examines a new 18” woofer from Precision Devices and the recently released 8” coax woofer/compression driver from Celestion.

The February 2015 edition of Voice Coil is already available and features our annual Loudspeaker Cone Vendor Survey 2015. James Croft’s Acoustic Patents reviews recent inventions from Libratone (Denmark) and Genelec (Finland). Vance Dickason’s Test Bench focuses on a 6.5” pro sound midrange driver, from PRV Audio Brazil and the reissue of the famous G12H “GreenBack” 12” guitar speaker by Celestion. Mike Klasco writes about the Endumax cone material by Teijin Aramid.

New for 2015, Celestion announced the introduction of its new FTX range of common magnet motor coaxial loudspeakers and the launch of the CDX07-1075; a new ¾-inch exit, neodymium magnet compression driver. Both products will be shown at the NAMM 2015.

In the December 2014 edition of Voice Coil Vance Dickason’s Test Bench discusses two very different woofers — the 18” Celestion CF1840JD pro sound subwoofer and Dayton Audio’s 7” ES180Ti-8 home audio woofer. In Acoustic Patents, James Croft reviews two loudspeaker-related patents filed by Dolby Lab Licensing Corp. (US) and comments on its own Transducer With Improved Electro-Magnetic Circuit patent.