When you look at a speaker page, think about what you can learn that will help you build your own:

1. What kind of sound was the designer looking for?
2. Which drivers did they use, and why did they pick them?
3. What are the crossover slopes, and how complex/expensive do they look? Try to understand how the circuit works.
4. What does the enclosure look like: Sealed, vented, dipole? (You can enter the driver and box parameters into Unibox to see what kind of bass response the designer was aiming for.)

Links to Projects, Discussion Forums, and Parts Suppliers

• Pictures and information for this class

Simulations/Programs

• Speaker Workshop (free crossover design program): You may be interested in this one if you want to play with speaker designs from home.
• Baffle diffraction simulator: You can learn a lot from moving the drivers around on a baffle and seeing what happens.
• Unibox: Thiele/Small bass enclosure modeling.
• Cara: Room acoustics modeling, unfortunately not free.

Manufacturers/Suppliers

• Parts Express: Our friendly sponsor, they carry bazillions of drivers and electronic components.
• Madisound: Another supplier with a different selection of drivers.
• Solen
• Digikey (Electronic parts)
• Ascendant Audio: Kind of like Adire but newer (they have good woofer prices!).
• Acoustic Elegance: Used to be Stryke. Also a DIY woofer outlet.
• GR Research: Small supplier of drivers and DIY/commercial designs.

Speaker Projects

• Single driver TQWT speakers: This is an interesting type of enclosure design, do you want to try it?
• Dennis Murphy's page: Several easy to build speakers.
• Fostex FE164 single driver speakers.
• Nice modern 8" 2-way.
• Using waveguide on tweeter.
• Large scale "clone" of $68k speaker.
• Dipole speakers by Linkwitz (ever heard of Linkwitz Riley?).
• Infinite-baffle Tempest.

Amplifier and Other Projects

• Lots of ideas with PCBs available
• Easy IC based amplifier kits
• Leach Amplifier
• Pass DIY (Nelson Pass is a famous amplifier designer and founder of Pass Labs, a very high end audio company)
• Foreplay, a popular tubed preamp
• CD-player clock mod
• Homemade CD player (fascinating even if you can't read Chinese)

Discussion Forums

• HTF
• HTG: So many finished projects are embedded in this forum
• Madisound
• DiyAudio: Some more hard core electronics type people