Archive for the ‘Speakers’ Category

DIY Speakers For The Wise

Wednesday, August 20th, 2008

Bill Fitzmaurice is the maestro when it comes to DIY horn-loaded speaker systems. He’s got designs large and small, wedge, sub and tall. I’m seriously considering one of his designs for our new church location (I’m entertaining a single copy of the dual 12 version.)
Omni 12 Top

My last DIY project served us well, but I’m looking for something with a little more projection and defined dispersion. The high SPL of all his designs are an added bonus. I’ll probably recycle my existing sub, after that I think a couple of these loaded with dual 12’s would do nicely.
Tuba 24 Sub

Our previous PA “tops” (times 4). Those are dual Vifa 8’s (same as used in one of the older Mackie self-powered studio monitors), Audax Pro (PR series) 6 inch mid (used by EAW for eons), and Audax PR series tweet.

Vifa/Audax Cabinets

Vifa/Audax Cabinets

The sub, those are the venerable Swan 305 woofer from Madisound, now “out of print.”

Swan 305 X 4 Cabinet

Swan 305 X 4 Cabinet

Bear in mind, this is all in a 40 X 40 room with 10 foot ceilings.

Speaker Building Tool For OS X

Thursday, July 3rd, 2008

I’ve never been so excited about Windows. The de-facto standard free speaker building (mainly woofer/subwoofer cabinet calculator) application, WinISD is only available for Windows. There is a free online version, but now with an Intel based Mac you can run WinISD on a MacTel for free using Darwine. This screen shot is a bit “Beauty and the Beast” as far as GUI’s, but it works!

Darwine on Leopard

Passive Crossover Calculators, Woofer Box Modeling

Saturday, February 9th, 2008

Thinking about building speakers? Here are a couple of tools that could be helpful, a webpage for calculating standard passive crossover values. And another essential (use the web version if you don’t do Windows) tool, WinISD, allows you to eliminate the majority of the guesswork involved in getting the box right for your woofer/subwoofer. And Madisound has a page full of free design stuff as well.

And Now For Something Completely Different…

Friday, February 1st, 2008

A buddy sent me this link. I’m sorry, but with my car audio experiences, this was too rich to keep to myself. My favorite is the Piezo-mobile, that’s gotta have sensitivity around 110dB 1W/1M.

DIY Speaker Building

Tuesday, January 15th, 2008

PartsExpress has obviously executed on a plan to be the source for DIY speaker builders, here’s their project showcase link.

And the “old-timer” in the biz, Madisound. I’ve spent a ton with them.

Speakon Connectors; They’re What’s For Dinner

Tuesday, January 15th, 2008

Neutrix Speakon connectors are the de-facto standard on professional speakers and amplifiers these days. You will still see plenty of 1/4 inch jacks in use, but anything of substance features the Speakon connectors, and with good reason. They feature 4 or 8 conductors simplifying the cabling of bi-tri or even quad-amped cabinets, portable rack to structure interfacing, or just increasing wire gauge by using multiple conductors in parallel.

Speakon Connectors

They can come in handy for car audio too :~) I use one in my van system to connect my very compact sub (picture to follow.) Since the amp is still in the vehicle and only drives the sub I wanted a way to kill the turn-on wire to the amp when the sub wasn’t connected. Enter; the Speakon connector, 4 conductor version. I pass the feed to the sub through 2 of the pins, and a send/receive feed of the turn-on wire through the other 2. Inside the sub cabinet I have the 2 pins for the turn-on wire jumpered together, so the only way to turn on the amp (and only needing <100 mA capacity to get it done) is to have the cable plugged into the sub. This made it a no-brainer for my wife to deal with (user friendly) and kept the amp safe by not being driven into no load since the head unit still powers the 4 corner speakers.

Radio Shack LX-5 Crossover Mod

Friday, January 11th, 2008

Another habit hobby of mine is speaker building. I don’t own a pair of these but there are plenty who do, Larry Van Wormer came up with this mod that’s supposed to really make these speakers shine. Here’s another page discussing the design and other mods.


Radio Shack LX-5