dB616tl Speaker Project Build Diary



Introduction
Day 1
Day 2
Day 3
Day 4
Day 5
Measurements
Day 6
Day 7
Day 8
Day 9
Day10


Links

dB616tl plans

dB61tl construction/review

Parts Express Forum

Parts Express

Transmission Lines



And of course, take a look at builddiary.net my page for all things excessive-hobby related.





This wasn't much of a day, but I did make some progress, so here it is.

The shop in Hood River wasn't available, so I decided to build the crossovers. I had to ask Dave Brown a couple of questions (which side of the power supply was positive (the top), and were the woofers wired in series or parallel (parallel)), which he very promptly answered. All my questions so far have been anwered quickly, even to the point of changes to the web site on the same day I ask them. He seems like a really nice guy.

The crossovers went together really quickly, most of my time was spent double checking all the connections, plus both crossovers worked correctly right off the bat. I built a theremin once from a kit, and I spent quite some time tracing down grounds to the case, etc.

After listening for a while, I noticed quite a lack in the bass frequencies, even more than you'd think from running the drivers without a cabinet, and I found out that I had made the classic speaker building mistake--reversing the polarity of one set of speakers, so once I swapped the leads to one of the speakers, I got much better bass. I can't wait to here the speakers in the cabinets.


The speakers mocked up on top of my computer case (no, the computer is not inside...)


The crossover, wires twisted together but no solder yet.


The whole crossover/speaker system. Notice the mighty Marantz 2238b, receiver of the gods...