![]() ![]() This in conjunction with adjusted driver placement along the line ( ⅓ down the line from the closed end is a good starting point) and tapering the line at about a 4 to 1 ratio down to the port. Oftentimes it is advantageous to tune slightly above their resonance in order to tame the quite jagged FR produced. On the other hand low Q drivers can be quite temperamental about this alignment. 65 are generally very happy about being in this enclosure and perform exceptionally. If a high Q driver is being used it is actually optimal (at times) to tune below driver Fs. You don't necessarily have to tune to the Fs of the driver being used. Each type will perform differently in a TL. 35 anything above that number is considered a high Q driver and anything below is considered low Q. The midpoint for high/low Qts in a TL is widely considered. Another rule of thumb is Fs as it relates to the Qts of the driver. ![]() It is a reasonably accurate tool that I only recently discovered but as previously stated you will still be tweaking and optimizing your setup/design after construction. It will calculate a standard line with no taper as well as a line that tapers down to the port ( useful in taming the FR of an overly excited driver) or vice versa a hybrid horn type that flares out to the port ( Google search for "Voigt Pipe"). ![]() Those will be HUGE enclosures! Go big or go home right? I actually have a spreadsheet calculator for Excel based on Martin J King's alignment tables for traditional transmission line enclosures. ![]()
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