|
NAVIGATION
TOP of Page
MAIN Page
HOME Page
WORKSHOP
About the Speaker
Speaker Design
Listening Tests
Specifications
Crossover Network
|
About the Loudspeaker
Speaker with Grille
|
Speaker Rear Panel
|
The Workshop Loudspeaker is a compact two way acoustic suspension bookshelf mounted loudspeaker,
built from a set of cheap Jaycar bass drivers and a leftover pair of Sony Tweeters.
This speaker is the mainstay for my background music whilst pottering around in the backyard workshop.
The acoustic performance is more than adequate for fatigue free listening to FM radio.
TOP
MAIN
HOME
Designing and Building the Loudspeaker
The Workshop loudspeaker system was built to provide a reasonable background music source whilst I worked in the
backyard workshop. This meant the design required a small footprint to fit on an elevated shelf with the other
speakers undergoing testing whilst still being able to withstand A/B testing with other designs. The design is a
small acoustic suspension sytems using a cheap Jaycar 5" Woofer/Midrange and a pair of Sony cone Tweeters extracted
from a sad sounding stereo I dismantled.
Both drivers had the cones doped with PVA to prevent cone breakup, with the 2nd order Linkwitz Crossover contributing
to the clean sound. I am not concerned about the two sections having different impedences, as any decent modern amp
should have no problem handling this; the Workshop amplifier is a 30 year old Sansui AU-217. Crossover assembly was
on a Jaycar CX-2605 Crossover PCB, using Jaycar off the shelf inductors and polypropylene capacitors.
I stained the cabinet to great effect and used a decent set of speaker connector terminals on the rear panel.
Speaker Baffle
|
Speaker Drivers
|
TOP
MAIN
HOME
Listening to the Loudspeaker
Originally the sound was a bit harsh until I doped the bass drivers. After this the speaker came alive,
and is surprisingly good for a system with a cone tweeter. The bass response does not seem lacking
and the speaker has an overall balanced sound which has provided many hours of fatigue free
listening.
TOP
MAIN
HOME
Loudspeaker Specifications
|
Specifications :
|
Two Way Acoustic Suspension Bookshelf
|
Dimensions :
|
155mm(w) * 155mm(d) * 270mm(h)
|
Enclosure Volume :
|
3.8 litres lined
|
|
Freq. Response :
|
120hz-16khz @ -3dB
|
|
Efficiency :
|
88dB SPL @ 1W @ 1 metre
|
|
Impedence :
|
4.0 ohms typical
|
|
Power Handling :
|
10W rms
|
|
Crossover :
|
3,500Hz 2nd Order Linkwitz Network
|
|
Imp. Correction :
|
Woofer and Tweeter Voice Coil Inductance
|
|
Bass Driver :
|
Response AS-30210 125mm Paper Cone Mid/Bass
|
|
Tweeter Driver :
|
Sony 329-11 50mm Cone Tweeter
|
TOP
MAIN
HOME
Crossover Network
 Circuit for the Crossover Network
TOP
MAIN
HOME
|
