“As a former professional orchestral musician I have been studying live sound and performances for most of my life. It is this sound of reality that I strive to convey from my systems and component designs. Proper timbre, placement, articulations and overtone series are all areas of extreme importance when trying to accomplish a realistic sound.
I was fortunate enough to purchase a pair of Trio 15 TB speakers from a very talented woodworker named Jon Parkhurst of Wisconsin. He made the baffles out of 5 different types of wood and I had never seen anything like them. I think that they are stunning! These speakers did not come with any crossovers so I ordered the proper Leonidas series crossover to see what the true intent of the design was.
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I received the units from Mundorf within about ten days after speaking with Ze’ev. After letting things settle in for a number of hours it was finally time for a listen. It was quite an experience to hear a commercial speaker that exudes the characters which I deem so important to realistic reproduction. Instruments, voices, ambient space, and extremely accurate tonal reproduction were all rewards for purchasing these very fine speakers.
After some time with them in my music room I began to think about tailoring their sound even further. If you have the Leonidas crossover units you can easily introduce or exclude different components into the crossover. Changing values is equally as easy with no soldering required.
After doing some measurements and revised simulations I came upon a design that I really liked. By changing crossover frequencies with various component values I freed up the TB driver to perform over a more optimum frequency range. This in turn allowed the lower frequencies to open up further. The treble was also greatly improved as the TB full range had much less work to perform. Also the reduction in driver overlap allowed a much more natural overtone series. You could hear a violin as if it were directly in front of you and you could feel the wood body resonate. This was it!!
You may be surprised that my series crossover is even more simple than the production circuit. Fewer components and connections allow for less signal degradation and I believe this to be another plus to this version.
Ze’ev and Meir Mordechai (of Morel Speakers) have tested my crossover and have been very impressed. Mr. Mordechai is one of my heroes in the industry and I have used his drivers in many successful designs. To receive praise from him has been the greatest reward for all the time spent on this revision!
Due to the positive feedback Ze’ev has decided that he wants to offer this circuit as an option to the wonderful customers of PureAudioProject. I humbly offer my work so that others may experience and enjoy even more from their Trio 15 TB speakers.
It has been an amazing process working with Ze’ev and I look forward to working with him on future projects. He is a true gentleman and I believe his company is offering the best value in loudspeakers in the world!
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