I have 20 year old transmission line speakers that need new woofers. The OEM woofers and are no longer made and I don't have the specs on them. I never thought they were the best thou. Unfortunately I am inept at the formulas and programs to simulate a TL speaker. I am therefore humbly asking for help. I can provide fairly accurate info on the cabinet. It's a "classic" folded design with the woofer at one end of the line.
Volume about 2.9 cubic feet
Line length about 7.2 feet lightly stuff for the first 6 feet. A Stereophile review of the speaker (Innersound Eros) said the tuning of the line was about 30Hz.
The line is tapered from about 135 square inches at driver. At about 6.5 inches down the line it is 81 square inches then at the the terminus it is 36 square inches.
It will crossover at 48dB/octave at 170Hz
I am using biamped external crossovers and Dirac room correction.
I don't listen at high SPL but in my room Dirac boosts at about 50Hz by about 9dB.
If someone could just use the software to guide me on what specs simulate best.
Here are some woofers that seemed possible to me in case someone has specific recommendation but mostly I just need some direction on what specs I should aim for.
Seas Prestige CA26RFX (H1305)
Seas Prestige L26RFX/P (H1209)
Scanspeak Discovery 26W/4534G
KEF B139 SP1044
Thanks,
Doug
Volume about 2.9 cubic feet
Line length about 7.2 feet lightly stuff for the first 6 feet. A Stereophile review of the speaker (Innersound Eros) said the tuning of the line was about 30Hz.
The line is tapered from about 135 square inches at driver. At about 6.5 inches down the line it is 81 square inches then at the the terminus it is 36 square inches.
It will crossover at 48dB/octave at 170Hz
I am using biamped external crossovers and Dirac room correction.
I don't listen at high SPL but in my room Dirac boosts at about 50Hz by about 9dB.
If someone could just use the software to guide me on what specs simulate best.
Here are some woofers that seemed possible to me in case someone has specific recommendation but mostly I just need some direction on what specs I should aim for.
Seas Prestige CA26RFX (H1305)
Seas Prestige L26RFX/P (H1209)
Scanspeak Discovery 26W/4534G
KEF B139 SP1044
Thanks,
Doug
Greets!
You need to use Hornresp or similar to sim this, but easy enough to do, so the only 'stumbling block' is what constitutes 'lightly stuffed' and with what.
Regardless, the KEF's specs I have want a much larger net volume [Vb], different taper and don't have any of the other drivers loaded; so for now attaching the HR file in case others want to try the other drivers or have other suggestions since I don't keep abreast of what's available.
Yes, it' sims 30 Hz empty, so actual tuning will be a bit lower depending on stuffing density.
You need to use Hornresp or similar to sim this, but easy enough to do, so the only 'stumbling block' is what constitutes 'lightly stuffed' and with what.
Regardless, the KEF's specs I have want a much larger net volume [Vb], different taper and don't have any of the other drivers loaded; so for now attaching the HR file in case others want to try the other drivers or have other suggestions since I don't keep abreast of what's available.
Yes, it' sims 30 Hz empty, so actual tuning will be a bit lower depending on stuffing density.
Thanks GM but I have an old computer that returns a message that computer must be updated to download program.
You're welcome!
Bummer, the only other ones that should run fine is the original AkAbak, which is a pure pro designer, so has a too steep a learning curve for the vast majority of DIYers [me included], though from dim memory seems there's a 'dummies' HELP thread at one time along with a huge downloadable manual.
There was a few other fee paid programs, but don't recall their names ATM.
Anyway, posted it mainly for the many HR users here, though if none do, then I'll sim them as time permits.
Bummer, the only other ones that should run fine is the original AkAbak, which is a pure pro designer, so has a too steep a learning curve for the vast majority of DIYers [me included], though from dim memory seems there's a 'dummies' HELP thread at one time along with a huge downloadable manual.
There was a few other fee paid programs, but don't recall their names ATM.
Anyway, posted it mainly for the many HR users here, though if none do, then I'll sim them as time permits.