I have got them : 2- 10 cm wide ports 7 cm long. Thanks
40 cm X 120 X 30 cm.
Used in the l 100 t
Actually it does allow for multiple ports. For a 140 liter box with 2x 100mm diameter ports, Winisd shows 255mm duct length, which will poach some cabinet volume, requiring additional compensation. But I suggest you consider the warnings about a too-large underdamped system per Andreasmaaan above, which I overlooked as I didn't realize a second page had emerged since I opened the thread this morning (USA). Or if you otherwise liked the L100 performance, just duplicate the volume and port parameters of the L100, brace the cabinet well, and hope the booming bass goes away. I'll also take the liberty to recommend that you reconsider actively multiamping your DIY system, despite your hesitations. Control is a beautiful thing, and optimizing passive crossovers is---for me at least---an art that takes a lot of testing and informed analysis to rise above the level of optimistic flailing. I'm very pleased with the performance I'm getting from an older 7.1 AVR with discrete analog inputs that I bought used for $50usd, used as a 7-bandpass power amp downstream from a DSP. But then, my drivers (sub excluded) are >100db sensitive.Thanks, I am settling on two 10 cm wide -7 cm long ports, not definitive, WINISD does not let you chose 2 ports, dont they ???
Friends help friends build speakers.
I love working with vintage pro drivers. Your friend will love them too.
Can you elaborate on your behemoths? I'm a behemoth lover.
Friends help friends build speakers.
I love working with vintage pro drivers. Your friend will love them too.
Can you elaborate on your behemoths? I'm a behemoth lover.
Thank you, Paolo, I like your behemoths very much! I wish I could hear them, but there's a little ocean in the way. We share some common preferences: active multiamping and cabinet damping, and of course lots of piston area. My avatar depicts one future version of my own behemoths, using old Wharfedale W70 cabinets with sand-filled backs as a nucleus, and constructed of birch salvaged from discarded mid 20th century furniture. Drivers for my behemoths-in-process are:
>TOA HLS38J-8 38cm woofers (Altec clones by Fostex or Coral).
>University ID40 alnico midrange compression drivers on hand-laid fiberglass radial horns similar to Community SRH or JBL 2345.
>superb TOA (Fostex/Coral) HT-371-8 alnico ring/slot compression tweeters similar to the famous JBL 2405. These are especially sought after in Europe, as I understand it.
> a 46cm B&C pro cinema subwoofer in a separate cabinet.
I have "breadboarded" these drivers together with 3.1-way active multiamping, and I am blown away by the sound quality, far beyond my initial expectations.
I'm also blessed with a big detached listening space of about 100 sq meters. Unfortunately it is unheated, so in winter I only listen on warm sunny afternoons. I have a theory that every recording is best listened to at a similar spl to that at which it was mastered. So for each recording I try to find that sweet spot level, and sometimes it turns out to be really loud. A great example is the thrilling live recording of the Phil Collins Big Band: Hot Night in Paris... wow!
P.S. I should clarify that I do have other good listening options in heated spaces: modified/updated Klipsch Fortes in my parlor and a Klipsch Heresy 2-based 5.1 home cinema system. But they can't compare to my behemoths for richness, clarity, dynamics, and imaging.