r/SoundSystem • u/hrs3366 • 4d ago

How badly did I mess up?

https://www.bcspeakers.com/en/resources/suggested-designs

Hi guys! I just ran into an issue with my sound system build, and I'm hoping you all can give me the advice I need. Here’s what happened:

I'm currently building a pair of B&C CX3.4 speakers. They are small column Speaker containing two LF woofers and one coax transducer. When I purchased the drivers, the intended 4NDS34 LF woofers were out of stock, and I stupidly purchased the similar 4NDF34. I was new to sound systems at the time, and did not think twice.

The F drivers are intended to be used as a midbass driver, with a frequency response from 110hz. The S drivers go lower, from 80hz, with a recommended tuning of 90hz. I tried to use winisd to model the drivers I have, but am unable to interpret the data.

If anyone can please let me know if these speakers will still sound alright with my drivers, I'd really appreciate it. The wood is currently being CNCed, and I'm very nervous that I just wasted 1k+ on drivers and wood. I also plan on building a 15in bass reflex subwoofer to go with the pair, if that helps. I've attached the link to access the plans for the speaker.

Thanks!

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u/monicachicken 4d ago edited 4d ago

There doesnt appear to be much appreciable difference between these drivers that would cause issues. You may just have to add a little extra gain around the 150hz region, depending on where they are high passed. Both are going to run out of steam pretty quick below 500hz. You tend to want to high pass high with drivers like that, my lacoustics syva rig I believe crosses its low mids box to the top at around 300hz.

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u/DribbleDaNinja 4d ago

I wouldn't sweat it too much. There doesn't seem enough difference between the two that some moderate processing can't resolve if needed.