Test Bench: Precision Devices PD.185N02 Woofer

I received a transducer for this month’s Test Bench review from a pro sound OEM company that has not previously appeared in Test Bench — Precision Devices from the UK. Precision Devices sent the PD.185N02, a new 18” high-power handling neodymium motor woofer, from its next-generation transducer range, which features four different 18” models. Intended for use as a sub bass driver or woofer in bass reflex and horn loaded systems, this driver can also be used in closed box designs. This article was originally published in Voice Coil, October 2015.

This month’s Test Bench focuses on Acustica Beyma’s 12MC500 12” pro audio woofer. This unique woofer with competitive features and performance for a 2,5” voice coil ceramic magnet design features Malt Cross technology, Beyma´s patented advanced cooling system and handles up to 1000 w program power, managing to drastically reduce losses due to power compression. This woofer is low in weight for a ceramic woofer and a competitive candidate for line array systems. This article was originally published in Voice Coil, October 2013.

From the innovative minds of MAG Audio comes a new high-power low distortion 21” low frequency transducer, which the Ukrainian company says is a competitive high-quality alternative to more compact and effective subwoofers designs. The new MAG M2108 woofer uses a aluminum die-cast frame with improved ventilated 4.5” voice coil and features the company’s removable self-centering ferrite magnet system.

The transducer under review this month is from the Italian pro sound company, Eighteen Sound. Designated a subwoofer, the 18TLW3000 is a high power handling woofer rated at 1,800 WRMS with substantial features, including what Eighteen Sound calls a “Tetracoil” dual winding and interleaved sandwich voice coil (ISV). This article was originally published in Voice Coil, December 2013.

LaVoce continues to extend its product catalog now introducing a new 15” high performance low-frequency ferrite driver WAF154.00, entirely designed in Italy with Finite Elements Modeling and Analysis methods. Featuring 1500 W AES power handling and high mechanical excursion, the transducer delivers 97 dB Sensitivity with really limited harmonic distortion.

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.

Pro sound OEM driver manufacturer Acustica Beyma's extensive line of pro sound coaxial drivers now includes the 12CXA400Nd 12” coaxial driver. Applications for 12” drivers include floor monitors for stage use, studio monitors, or any requirement where baffle space is limited. This article was originally published in Voice Coil, October 2014.

Voice Coil characterizes an 18” pro sound subwoofer from BMS Speakers, a noted German pro sound company. The BMS 18S450 is high power handling woofer rated at 1,200 WRMS. It weighs a moderate (for an 18”) 32 lb. Features for the 18S450 are rather substantial and include a proprietary eight-spoke cast-aluminum frame. This article was originally published in Voice Coil August 2104.

This Test Bench is about the 12NDL88 from Italian pro sound OEM, B&C Speakers. The 12NDL88 is a new 12” high sound pressure level (SPL) woofer, with a neodymium motor and a continuous power handling rating of 1,400 W (700 W RMS). This article was originally published in Voice Coil, August 2015.

Speakers evolved from a single sound source to having separate low-frequency and high-frequency drivers, each optimized for its own frequency range, to multi-way designs, with additional low-mid, high-mid and even super-high frequency drivers. Dr. Richard Honeycutt explains how to optimally choose these drivers. This article was originally published in Voice Coil, January 2012.