Tin Tuirtle Design


Cornscala Hifi Speakers

When my JBLs died after the first rebuild I knew I needed something more robust. I had never owned horns and thought they would be interesting to try. This, along with the bi-amp capability and the elimination of any need for a subwoofer sealed my decision to go with the Cornscala design. The Cornscala loudspeaker is a hybrid design using the bass cabinet from a Klipsch Cornwall mated to the mid-upper cab from a Klipsch LaScala.

Typically this design is constructed with a simpler, single box look but I wanted to create something more aesthetically pleasing and somewhat shallower in depth. As my drawings proceeded I found myself coming up with something that had a vintage look but was capable of some serious sound pressure. The work that has been done on the Cornscala project by Bob Crites from Crites Speakers was very useful and I found him to be extremely helpful during the planning phase. He ended up being my source for drivers and cross-over components.  The details of the construction process are documented in the links I have listed on the left.

The goal was to create an impressive loudspeaker that would match the rest of the cherry and walnut furniture in this room.  I went with a cherry veneer and walnut highlights using the wood from the same tree as the rest of the furniture.  Finishing was a two part process beginning with Arm-R-Seal urethane and ending with coats of Chemcraft Variseal and their Varicure precat laquer. The durability of this particular finishing process is incredible while still giving a soft furniture  grade look.  I am very fond of the Chemcraft line now.  Assembly in place was the only way to go as the final weight was ~100 pounds (45 kgs).  The picture above shows them placed with toe-in but this has been changed to a perfect parallel to the wall.  When toed-in they were.... "overwhelming".

The top post from the construction process contains graphic measurements of the actual output of the speaker in that room. It gives relevant information as to how the cabinet and port design worked out. I had several guys come over who had the equipment and knowledge to help me understand exactly what I had created and those results are shown here. With a >100db efficiency plus the horns they reveal everything. They were particularly unforgiving of my old Technics MKII and I have since moved over on to the Transnova. But at some point to really get the most out of them a new two channel amp would be nice. Of course pure insanity would be to attempt the biamp.  Once mated to a full 5 channel setup I expect my home theater experience will be very impressive. At this point the two channel audio really shows the power of the 15" woofer while listening to anything with brass is very smooth.  Horns love horns.

The Turtle's Shell The Turtle's Postings
Front window assembled
Spraying Bay Window Parts
Cherry & Bocote Knife Block
Chicken & Sweet Potato Stew
Window trim is almost done
Halibut with Purple Potato
Back to Missouri
Front Window Project
White Chili
Casserole for Movie Night

Essential Woodworking
David Savage - Furniture with Soul
Marc Adams School of Woodworking
David J. Marks - Gallery
Hickory & Oak Sawmilling
Lee Valley - Tools and Hardware

Essential Cooking
Essential Beijing
City Weekend Beijing
The Hutong
Beijing Air Quality Index
An American Doctor in China