July 2004 Meeting
Date: Saturday, July 10, 2004--NOTE DAY AND TIME
Time: 2:00 PM
Place: Broad/MIT Institute for Genome Research
320 Charles Street
Featured Guest: Jesse Spence
Topic: Driver Design Basics and More
Jesse Spence, founder of Bully Subwoofers (www.bullysubs.com), will be talking
on modern driver design from subwoofers to midranges to tweeters. The discussion will begin with the physics behind what makes drivers move and create
sound. The talk then moves to reasons for design choices, materials available for driver design, causes of distortion in drivers, and visualization
of causes of frequency response fluctuations. The talk will present these topics and more from a driver designer's perspective, and tools available
to the designer such as Finite Element Analysis will be exhibited.
The talk will include topics of interest to people ranging from those who are interested in drivers and how they work to those who
regularly work with drivers. Questions will be encouraged.
Jesse Spence has been designing loudspeaker drivers for his entire professional career. He earned his BS in Mechanical Engineering
from the University of Rochester, after which time he worked at Boston Acoustics as a Senior Transducer Engineer. There he was in charge of many transducer
design projects covering the home, in-wall, and car audio markets. After leaving Boston Acoustics he began working on his own driver design projects
that ultimately led to the creation of Bully Subwoofers. Jesse also works as an acoustic consultant in the noise control field.
Directions: (It is about 1/4 mile north of Volpe)
Proceed to Kendall Square [as if going to the Volpe Center]. Go to Broadway and turn onto 3rd Street [as if going to the
Volpe Parking], proceed [past the turn into Volpe Parking] to Binney Street. Turn left onto Binney Street. Go for two blocks, turn right onto
6th Street. Proceed for two blocks, turn left on Charles Street. The Broad Institute is on your left. It is a two story tan colored building that
covers the entire city block. Park on the street either on Charles Street or Bent Street. [Charles tends to fill with Taxi Cabs, Bent is open
on Sundays, Permit parking is not enforced on Sundays] The entrance is at the Corner of Fulkerson and Charles Street. [On the glass it says Whitehead/MIT
Center for Genome Research]. The meeting is directly inside.