All items tagged with Voice Coil Issues (72)

Test Bench: Stereo Integrity’s TM65 mkIV High-Performance 6.5” Woofer

July 17, 2024 by Vance Dickason

Test Bench: Stereo Integrity’s TM65 mkIV High-Performance 6.5” Woofer

This Test Bench addresses the Stereo Integrity TM65 mkIV High-Performance 6.5” woofer. Stereo Integrity is an interesting new company that is aiming at both home audio and automotive/mobility applications. Features for the unique TM65 mkIV include a black anodized aluminum cone and black anodized dust cap. Suspension is provided by a tall NBR surround plus a flat 105mm diameter Nomex spider with a linear roll configuration. Total depth of this driver with its proprietary frame and motor structure is a mere 58mm (2.28”).

Test Bench: The SIG180-4 6.5” Woofer from Dayton Audio’s Signature Series

July 10, 2024 by Vance Dickason

Test Bench: The SIG180-4 6.5” Woofer from Dayton Audio’s Signature Series

Dayton Audio’s SIG180-4 is part of a woofer series with five cost-effective, high-performance models, ranging from 4” to 10”. All drivers include single-piece concave aluminum cones, polyimide vented voice coil formers, open cast-aluminum frames, plus indexed shallow transition NBR surrounds. Rated for 80W RMS power handling capacity, the SIG180-4 woofer features a FEA-optimized ferrite motor design and a 1.25” voice coil wound with round copper wire.

Patent Review: Acoustic Passive Radiator Rocking Mode Reducing

June 12, 2024 by James Croft

Patent Review: Acoustic Passive Radiator Rocking Mode Reducing

With the increasing popularity of miniaturized systems, the application of the passive diaphragm radiator, as the acoustic mass component in a bass reflex enclosure, is becoming standard practice in the low-frequency portion of the system. And these systems have a few parameter demands that can exceed the capability of many conventional approaches to passive radiator design. In order to solve those challenges, including rocking modes, Bose proposed an effective design.

Test Bench: Eighteen Sound’s 8NTLS2000 8" Pro Sound Woofer

May 22, 2024 by Vance Dickason

Test Bench: Eighteen Sound’s 8NTLS2000 8" Pro Sound Woofer

Eighteen Sound's latest 8NTLS2000 8" high-power handling woofer, designed for professional audio applications represents the latest Tetracoil technology from the brand. It maximizes benefits in terms of thermal dissipation and Bl symmetry, making the 8NTLS2000 ideal for small volume subwoofers, high-quality line arrays, and compact multi-way systems. The 8NTLS2000 benefits from its substantial cooling vents that allows air to move past the voice coil and across the front side of the neodymium motor assembly. This article was originally published in Voice Coil, February 2024.

Test Bench: The New DE350-8 Ultra-Compact 1" Compression Driver from B&C Speakers

May 1, 2024 by Vance Dickason

Test Bench: The New DE350-8 Ultra-Compact 1" Compression Driver from B&C Speakers

This Test Bench characterizes an ultra-compact (under 60mm diameter) compression driver, along with the B&C Speakers ME10v2 90°x60° coverage horn. The really cool feature of the DE350-8 is the patent-pending phase plug. Inside, the DE350 has a round symmetrical outside channel, and an inside channel with a patent-pending twist for overall improved frequency response. Weighing in at a mere 275 gram, it is an ideal candidate for the new generation of lighter, more compact line array loudspeakers.

A Visit to Audio Precision to See the New APx516 Analyzer

April 24, 2024 by Vance Dickason

A Visit to Audio Precision to See the New APx516 Analyzer

Vance Dickason visited Audio Precision's headquarters in Beaverton, OR, where he met with Dan Knighten, AP's Product Line General Manager, to talk about the new Audio Precision APx516 Analyzer. This is a new relatively economical analyzer for the company, with a base price of $6000, which means that the APx516 is ideal for use with remote engineering staff, making it practical for companies to have high-precision test and measurement work being done in multiple locations.

Test Bench: The Purifi Audio PTT8.0X04-NAB-02 8” Aluminum Cone Woofer

April 10, 2024 by Vance Dickason

Test Bench: The Purifi Audio PTT8.0X04-NAB-02 8” Aluminum Cone Woofer

The PTT8.0X04-NAB-02 is the fifth Purifi woofer to be examined in Test Bench. The new 8" aluminum cone woofer includes the same constant Sd surround, cone edge stiffening ring, and low magnetic hysteresis motor design as previous models. The addition of the unique Purifi NBR surround, make the PTT8.0X04 like no other in the history of woofer development. The PTT8.0X04e is rated for 350W IEC268 long-term power handling, and a 9.3mm Xmax.

March 13, 2024 by Vance Dickason

Test Bench: The UF295FAS Thin-Profile Dipole 10" Woofer from Neotera

This new 10" thin-profile woofer comes from Neotera, a new company headquartered in Sweden, founded by a diverse group of loudspeaker/electronic design veterans. Maurizio Servadio is the engineer who invented the Neotera Ultraflat technology and is based in Italy where the UF295FAS is manufactured. This thin-profile woofer with a depth of 2.6" and with a low-frequency response down to 29Hz, is specifically designed for dipole system applications. This article was originally published in Voice Coil, November 2023.

Test Bench: The D2008/2010 Revised Classic Dome Tweeter from Scan-Speak

February 21, 2024 by Vance Dickason

Test Bench: The D2008/2010 Revised Classic Dome Tweeter from Scan-Speak

Vance Dickason measures the Scan-Speak D2008/2010, the revised version of the classic dome tweeter from the Danish brand. The D2010 and the D2008 are two revised classic Scan-Speak 19mm soft dome tweeters, originally launched more than 35 years ago. Scan-Speak basically discontinued production of the original 19mm ferrite magnet soft dome models and replaced them with these new 19mm textile dome neodymium motor versions.

Test Bench: The New TW030WA23/24 Tweeters from Wavecor

February 14, 2024 by Vance Dickason

Test Bench: The New TW030WA23/24 Tweeters from Wavecor

This Test Bench characterizes an updated version of the popular TW030WA23/24 tweeter from Wavecor, the latest in the company's 30mm tweeter lineup. The A23 is the 4Ω version, while the A24 is the 8Ω version and they are both available without a faceplate for custom mounting (the TW030A25/26 model). While the TW030WA23/24 have a very similar feature set to the Wavecor TW030WA13/14 tweeters, the biggest difference is a new graphene reinforced textile (Tetoron) 30mm soft dome.

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