Section 1: Introduction
This speaker has been evolving around the same outer shell since the beginning of the ninties.
It started out as a Voigt line, which was built before I knew much about speakers. The drivers did not fit the design at all. The last 4 years, the speakers have been reworked several times. But the shell still remains.
The internals are now a 1.2 m transmission line based on the recommendations of the designer of the TLB. After all this time, the current result is hard to believe.
- The active filter with an acoustical 1st order crossover at 500Hz provides exceptional coverage
- Baffle-step diffraction of the LF driver is handled by combining the box dimensions and the electrical filter frequency
- HF driver diffraction is minimized utilizing a separate enclosure on top with narrow dimensions
- Time alignment of the tweeter results in depth, width, heigth and sense of being in the concert hall
- Low distortion aluminium drivers gives exceptional electostatic-like clarity
- Low frequency response is remarkably good for a TL of only 1.2m. Frequencies down to 30Hz really rock the room, large symphonic music and organ are a dream on these speaker
The drivers for this design are the Jordan JX150 woofer and JX53 tweeter. The JX150 has a frequency range all the way up to 10kHz, while the JX53 can be used down to 200Hz. These are the perfect match for a 1st order system! Jordan drivers are not cheap, at $100 USD or more each. But then, these are used in systems costing several thousands.
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Jordan JX150 MidBass Driver
[ Contents | Intro | Measurements | Optimization | Integration | Step Compensation | Time Align | Crossover | Construction ]