Hi,
I would like to retrofit my old speakers by replacing the tweeter to SB Acoustics SB29BNC. Speaker sensitivities is 93dB, the crossover point is 2.5kHz (as noticed in manufacturer datasheet), the tweeter looks like Focal TC90 TD5 (6R, 93.5db).
I have no skills to use VituixCad for designing crossover, however, I have .frd and .zma files created by FPGraph from manufacturer datasheet.
The original crossover is 4th order.
I didn't find a lot of projects implemented with that SB Acoustics tweeter (SB29BNC) at diyAudio forum- the one and only was by @perrymarshall .
Any help will be appreciated.
I would like to retrofit my old speakers by replacing the tweeter to SB Acoustics SB29BNC. Speaker sensitivities is 93dB, the crossover point is 2.5kHz (as noticed in manufacturer datasheet), the tweeter looks like Focal TC90 TD5 (6R, 93.5db).
I have no skills to use VituixCad for designing crossover, however, I have .frd and .zma files created by FPGraph from manufacturer datasheet.
The original crossover is 4th order.
I didn't find a lot of projects implemented with that SB Acoustics tweeter (SB29BNC) at diyAudio forum- the one and only was by @perrymarshall .
Any help will be appreciated.
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There are different ways of doing it, each has different accuracy and some are easy and some difficult.
It depends on what you can tell us. So are you set up to measure acoustically or electrically? Can you show us crossover details?
It depends on what you can tell us. So are you set up to measure acoustically or electrically? Can you show us crossover details?
Without taking details of the previous tweeter we can't do a lot directly. If you simulate this and see no unusual effects you might be lucky to find the level is the bigger issue, so install it and see what you think. If it's too loud or quiet, use the simulation to discover whether changing the resistance is enough to change the level without side effects.
Here's a portion of the file. It shows over thirty ohms. My sim with a 4 ohm in parallel would make it roughly 4 ohms, and a resistor before that brings it up to around five, or six. The other components were selected to match a LR4 target in PCD. It matched pretty close. Not at 93dB though. I figured 90dB was more likely. A bunch of wild guesses really, but possibly a starting point for discussion.
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Hi, make things simpler : do a drop in replacement ! But add 2 or 2,2 ohms in series with the SB29BNC to reach the same level of 91.5dB... Listen and if sounds good keep as is !
Let us know if things are OK 🙂
Create a *.frd and *.zma file for the focal tweeter. In Xsim or vituixcad, set it up with the existing crossover. Duplicate this and set the second driver to have the new tweeter response and impedance files. Adjust the crossover until they are the same.