I've observed a few of SLOB projects come to life on here . A few carried to completion , and some caught in the web of "analysis-paralysis", and yet others hamstrung by unobtanium drivers (result of supply chain ripples)
Why did I build this:
mid-woofer: 8 x 6.5 poly cone woofers https://www.parts-express.com/6-1-2-Poly-Cone-Woofer-4-Ohm-299-609?quantity=1
mid-tweeter: GRS 8" planar https://www.parts-express.com/GRS-PT6825-8-8-Planar-Mid-Tweeter-8-Ohm-272-126?quantity=1
The planar makes this design what it is ... it can run as low as 200 Hz (heck .. I ran it full range at low volume and it worked) and has reasonably flat response .
The bass response is good to 50 something Hz with usable response down to between 40 and 50 Hz depending on positioning . Once again, I haven't set up my measurement rig yet .
While this design doesn't hit the lowest octave, it s strengths are that it
1. gets the bass fundamental and mid bass correct , allowing easy subwoofer integration.
2.is crossover friendly .. shouldn't be hard to crossover . This is essentially a Full range - woofer assisted design aka FAST
I haven't got my measurement setup working so for now, I've rigged up a 2 way crossovers at 500 Hz . I've tried various slopes and a bone stock 2nd order (or even a first order) Butterworth slope driver at that frequency sounds pretty good.
Tested with a run of the mill Yamaha receiver (cleaner + less bass) and also a pair of stock aiyima A07 mini amps that I haven't yet had a chance to tweak for more performance (more bass than the Yamaha but a tad less clear)
More to come . I may have to rebuild this with better materials and more attention to baffle dimensions and shape, wing design, rear wave treatment etc .
If anyone is interested in building a SLOb, this is a fairly cheap way to do it .. and not too bad sounding .
Why did I build this:
- To utilize the random scraps of cheap poor quality COVID era ply and other wood in my garage
- To provide a simple to build , cheap, good sounding example.
- Use readily available woofers with fairly common T/S specs that can easily be substituted in case of future non-availability .
- 2 way design with easy to work with drivers .
mid-woofer: 8 x 6.5 poly cone woofers https://www.parts-express.com/6-1-2-Poly-Cone-Woofer-4-Ohm-299-609?quantity=1
mid-tweeter: GRS 8" planar https://www.parts-express.com/GRS-PT6825-8-8-Planar-Mid-Tweeter-8-Ohm-272-126?quantity=1
The planar makes this design what it is ... it can run as low as 200 Hz (heck .. I ran it full range at low volume and it worked) and has reasonably flat response .
The bass response is good to 50 something Hz with usable response down to between 40 and 50 Hz depending on positioning . Once again, I haven't set up my measurement rig yet .
While this design doesn't hit the lowest octave, it s strengths are that it
1. gets the bass fundamental and mid bass correct , allowing easy subwoofer integration.
2.is crossover friendly .. shouldn't be hard to crossover . This is essentially a Full range - woofer assisted design aka FAST
I haven't got my measurement setup working so for now, I've rigged up a 2 way crossovers at 500 Hz . I've tried various slopes and a bone stock 2nd order (or even a first order) Butterworth slope driver at that frequency sounds pretty good.
Tested with a run of the mill Yamaha receiver (cleaner + less bass) and also a pair of stock aiyima A07 mini amps that I haven't yet had a chance to tweak for more performance (more bass than the Yamaha but a tad less clear)
More to come . I may have to rebuild this with better materials and more attention to baffle dimensions and shape, wing design, rear wave treatment etc .
If anyone is interested in building a SLOb, this is a fairly cheap way to do it .. and not too bad sounding .
Attachments
It's an open baffle except the woofer fires into a manifold .. resulting in a slight bandpass boost and more importantly , even order harmonic cancellation as a result of asymmetric alignment and also vibration cancellation as a result of the cones moving towards or away from each other in unison
The original
https://www.enjoythemusic.com/diy/0911/slot_loaded_open_baffle_speaker.htm
The original
https://www.enjoythemusic.com/diy/0911/slot_loaded_open_baffle_speaker.htm