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For future atmos build: Large bookshelf
This is a design I have been working on for the past few months. I am currently without any decent speakers and plan to use two of these. Eventually, get a sub, and after my degree (which I haven’t yet started it), I plan to save up and build a bunch more of these for an eventual 11 channel setup with 2-4 big sealed subs.
This speaker box isn’t your average shape. I chose a sealed box as I wanted better transients and it would cross over much neater with a sub when I get one.
I will post screenshots of the SketchUp design later. I have already tested the internal volume will give a QTC of 0.707 once stuffed.
But currently, I have the crossover design ready to roll out to the public:
Here you go guys, it is a bit of a crazy crossover. The tweeter has a steeper roll of than the woofer, I was able to do this because the woofer doesn’t break up until above 6khz but I wanted a low crossover point due to a weird resonance peak in the woofer’s driver.
I started in passive crossover designer 2.0 and then created my design as a circuit in xsim. In xsim, I inputted the values but also the inductors’ resistances. Weirdly this flattened the response further. YAY!
I also finetuned the design using different parts as ones you can buy are very different from your initial preference. All in all, I ended up with a response I much prefer.
The dip around 6khz is actually my preference, otherwise I can’t turn it up as loud as I’d like because my ears are oversensitive to those frequencies.
Also the BSC isn’t very intesnse at all because the speakers are going in the corners of the room. 🙂
The woofer: ND-140-4, Tweeter: ND-25FA
Both 4 ohms but in this parallel circuit I still get a 4 ohm impedence. My amp is rated for down to 3ohm.
Please could you help me with any mistakes I might have made. This is my first build.
Many thanks,
Elliott
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