30Hz High Power Compact Passive Radiator

PDF OF THE PROJECT: 0.modified_fearful_12sub__lab12c_2_x_dayt_sd315_pr_as_measd_imp_14_wshr__notes1

Designer:
mercifullyfree

Project Category:
Subwoofers

Project Level:
Advanced

Project Time:
1-8 Hours

Project Cost:
$500 – $1,000

Project Description:
Lab 12C used with 2 passive radiators to achieve 30Hz performance in compact enclosure. Due to lack of table saw I modified enclosure kit, but starting from scratch would probably be easier, if table saw available. Been using since 2014 with organ for low pedal notes with great results, but obviously, other uses would be great.

Design Goals:
Compact enclosure (<40 pounds & 2 cu ft) that extends to 30HZ with full use of 500W rating of LAB 12C for professional use with organ bass

Driver Selection:
LAB 12C

Enclosure Design:
passive radiator (dual)

Enclosure Assembly:
adapted kit

Crossover Design:
electronic with high pass at 25HZ

Conclusion:
successful – Been using for over 3 years and happy

About the Designer:
50 years exp (good to get old). Built first folded horn 45 years ago. Read republished (1971) Thiele/Small articles and built “bass reflex” cabinets, doing calculations by hand…love sound and love good bass.

Project Parts List