![]() Take this unit for example: Dayton Audio RSS210HO-4 8" Reference HO Subwoofer 4 Ohm Having noted the cost of that Tang Band unit, I don't think this is viable.Ĩ" drivers are where you start being able to displace useful amounts of air. You'd need 18 of the drivers you've linked to match the aforementioned JBL on volume displacement (cone area, Sd, multiplied by cone travel, Xmax). That's the cone area of a 24" driver (indeed, the drivers will form a 24" square) all because smaller drivers generally have less excursion available than larger drivers. You will, however, need 36 of those to keep up with that single 12". Lets take 3.625mm Xmax (to keep other numbers simple) on a 4" driver. A 4" driver with 7.25mm Xmax is more feasible, but still rare. Now, to match that with smaller drivers, each will need 14.5mm Xmax, which is rare for a 6" driver, and entirely unrealistic for a 4" driver. JBL claim 14.5mm Xmax, though I can say the driver's pretty nonlinear by that point. The problem here is that each of the small drivers must be capable of the cone excursion of the larger driver its trying to replicate. You'd need 4x 6" drivers, or 9x 4" drivers for the equivalent cone area. Take for instance, trying to outperform a single JBL GTO1214. The thing to consider is that using multiples of small drivers to get the cone area only goes so far. Hopefully this will be a fun and rewarding project (and you guys don't beat me up too bad)! How do you model it? Hornresp and/or AkAbak (anybody willing to help? I’m just getting started with these programs!)Īmp to pair with it? (in my head I see using a MiniDSP (read: Linkwitz Transform) but I not sure if say an iNuke amp gets me there without needing the MiniDSP?) What would this design be called? Push Push Slot Loaded Sealed. For this reason should I consider larger drivers (less of them)? Mind I'm not willing to give up too much space in my already cramped garage so let's put a limit on say up to 8" drivers) Other options I should consider are welcome? As these will be placed in-wall I realize that they will not completely fit in a 2x4 wall but as the wall I have in mind has my garage on the other side the back side of the box can extend into that space a bit and not affect my ability to park my car. Idea is to prototype one and if happy build three more while sharing my experience with the DIY community here.ĭriver I had in mind is Tang Band W4-2089 4.5" RBM Mini Flat Panel Subwoofer 4 Ohm: Tang Band W4-2089 4.5" RBM Mini Flat Panel Subwoofer 4 Ohm Will be paired with BG Radia SA-320 in-walls Oh and of course hidden speakers (pesky WAF!) I don’t typically listen at reference levels. Goals are low-distortion, even response, limited mechanical vibration, and low extension (60% movies/40% music). that is if you use enough small drivers of appropriate specs, lots of power, and DSP! DIY version of the BG Radia DGX-4850 In-Wall subwoofer based on THX Balanced Bass Line concept.īefore anyone says it… yes I want to copy a commercial design (to be fair, BG is no longer in business so take that for what it’s worth)… further I’ve read all the arguments for not using small drivers for bass frequencies and I don’t buy it.
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