Tweet
The Soup Du Jour is...... an MLTL version of Paul Carmody's venerable OS MTMs.
Do to concerns about my acumen with Mr. Martins worksheets I have kept this project under wraps for the last couple of months. Initial listening this evening indicates that the pieces of the project have come together as hoped, and so I share with the the TT community.
First the simulation. The TL is tuned to 40Hz with a 3" x 6.75" port. The worksheet and graphs are shown with 30W input and 3.6 ohm impedance. Both x-max and port velocity are within specification or accepted practice. IIRC, SPL is within 2dB from 40Hz to 1kHz. Stuffing is 0.7 lb/cu ft, which works out to 0.4lbs/box. TL length is 42" and 43.5" overall, using 3/4" MDF. Baffle width was maintained per original design and depth is 9.75".
Box construction is mitered corners with an 1/8" Wenge inset at 45 deg. Veneers are Qtr Claro Walnut with false baffle and pedestal in flat black and semi-gloss poly. Veneer will will be finished with tung oil, applied over the next week.
First listening impressions are that they are not bass shy, producing a very satisfying stand-up bass and kettle drums. My 12 yr old son commented that he could feel the bass line during an Eva Cassidy duet. Overall sound is a balanced OS MTM with increased bass extension.
Do to concerns about my acumen with Mr. Martins worksheets I have kept this project under wraps for the last couple of months. Initial listening this evening indicates that the pieces of the project have come together as hoped, and so I share with the the TT community.
First the simulation. The TL is tuned to 40Hz with a 3" x 6.75" port. The worksheet and graphs are shown with 30W input and 3.6 ohm impedance. Both x-max and port velocity are within specification or accepted practice. IIRC, SPL is within 2dB from 40Hz to 1kHz. Stuffing is 0.7 lb/cu ft, which works out to 0.4lbs/box. TL length is 42" and 43.5" overall, using 3/4" MDF. Baffle width was maintained per original design and depth is 9.75".
Box construction is mitered corners with an 1/8" Wenge inset at 45 deg. Veneers are Qtr Claro Walnut with false baffle and pedestal in flat black and semi-gloss poly. Veneer will will be finished with tung oil, applied over the next week.
First listening impressions are that they are not bass shy, producing a very satisfying stand-up bass and kettle drums. My 12 yr old son commented that he could feel the bass line during an Eva Cassidy duet. Overall sound is a balanced OS MTM with increased bass extension.
Attached Files
Comment