5/27/2023 0 Comments Unibox xls![]() Note that there is no way to get such a low Fc with 2 passive units in a reasonnable volume. I personnaly use 25 liters with 1 active and a 400 gr passive unit and - in simulation - I get F-3 at 22 Hz. an innapropriated bassboost (it SHOULD be defeated with this kind of sub)Ĭonsidering your volume and additionnal mass to the passive unit, the Fc shoud be around 20 Hz. Now, if you experience dangerous excursion (peek to peek is 25 mm with the SWR269, so it really shakes), it might be dued to : a real strong amplifier is needed (your hypex should fit) volume needeed to achieve F-3 around 30 Hz (let's say 29/31 Hz) is around 35 useful liters. Elég sok programot kipróbáltam, de a legtöbbnél mire eljut az ember a dobozig, elmegy a kedve az egésztl. Ráadásul maga a tábla személyes használatra ingyenes (bár az Excel nem az). Nagyon gyorsan lehet benne dolgozni és sokat tud, pontosan modellez. 400 gr mass on each passive unit is needed Miért a UniBox Mert véleményem szerint ez a legjobb dobozméretez. power handling is (of course) incresead ![]() I never listened to a 1+2 version but simulations show that : I made a lot of simulations and published curve on our DIY french forum ( as others did. We started first by building a 1+1 subwoofer, then (and few did) a 2+1 subwoofer. The SPL and the excursion for the driver remains the same.Ī few people in France have worked on building the ultimate subwoofer with SWR269 10'' XLS Peerless Driver. In the plot one can compare the excursions for the single PR and the double PR designs. Can’t really be a coincidence, doubled “piston area” doubled mass? Or? When trying 2 PR’s and aiming for this 23.68 Hz the weight of the PR’s is exactly doubled 770 gram each. Excel files that are macro-enabled use the XLSM file extension. XLS files store data in tables of rows and columns with support for formatted text, images, charts, and more. Later versions of Excel save spreadsheets as XLSX files by default. Simulating with “Minimal leaks” and “Minimal fill” (I guess the rods will slower down the air in the box a little bit) I get an Fb of 23.68 Hz. What Is an XLS File A file with the XLS file extension is a Microsoft Excel 97-2003 Worksheet file. Mechanical Xmax is +/- 22 mm for the PR so problems do occur approaching 25 Hz, so my apprehension seemed to be correct, maybe. I have downloaded the software (Thanks) and simulating my driver and one 385 gram PR in net volume of 27 litres makes very large excursion under 30 Hz. The amp is a Hypex HS 200, which is placed outside the box. The box has outer dimensions of 366x366x366 mm, the material is 5 mm steel and 18 mm pinewood, internally the box is braced with ø8 mm steel rods. What I’m thinking about is the analogy to a ported box, if you have a box with a specified port and you want to use two, to lower the speed, you have to make them longer. I imagine they should be heavier then today’s 385 gram. My problem is how to tune the two radiators. The net volume of my present box is 27 litres. ![]() A little more detailed description of my problem seems to be necessary: When running the sub at high SPL’s I get very large excursion in my PR, that’s why I would like to use two of them.
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