Sorry, I was at work. First off, I noticed diysoudgroup has a new speaker the "HT-12" for a little cheaper. Does anyone know what you miss out on with the cheaper design?
Originally Posted by asarose247
congrats on the 3 x HTM12 decision.
how they EQ - it depends
what equipment do you have
describe /post pics > the room
I'll be using berry amps, possibly with dsp. I'm going to get the cheapest refurbished yamaha amp with preouts. My current receiver is old and doesn't pass through 4k. We have a P75-F1 Vizio that will be mounted above the subwoofer TV stand. I'll attach pics of the room. It's not my stuff, it's from the listing before we bought the house. As you can see, it is large and open to the rest of the house. Not counting on any room gain here. Also not sure if this weird layout of the room is going to cause any problems with sound.
Originally Posted by jcmccorm
Personally, I'd just go get 4x more sealed. They'll go on sale again. I'm interested in how a ported box with these turns out though.
I EQ my 3 HTM-12's, sort of. I let Yamaha do it's setup with YPAO, then I copy the results to "manual PEQ" and tweak it from there using REW to show me what's going on. The Yamaha lets you adjust PEQ filters (Freq, Gain, Q) for each speaker. The frequencies are limited however. Anyway, it always ends up better then it was before tweaking.
I really wish I bought 8, because I would go sealed all the way with 8. I thought I'd build another disguised box against the wall behind the couch to look like a table for pictures and what not. It would get me extension into the teens and match the TV stand. But I don't want to bet on them going on sale again, and I want to start building now. So if they go on sale, it'll be a stand behind the couch, ported. Or I could seal the ports on the current one and go all sealed. 4 of these subs sealed doesn't compare to the f20, but ported does so that's what I'm going to have to do for now.
I like your method of Eq on the cheap. Can you link me a good guide for REW that I can use to copy your method? And what hardware do you use? I assume you need a mic or something?
Originally Posted by fill35U
Use outboard standalone DSP, like a MiniDSP, or the Dayton DSP-408. Pro offerings include the dbx DriveRack family, and the Berry DCX2496 knockoff. There are more expensive options, but they're overkill for sub duty.
When shopping for features, consider the sub placement in the room, and how much delay you might need for integration. You'll also want a separate channel for each sub.
It could be done in the analog domain with active filters, but they won't be as fun and versatile as DSP. If you don't need too steep of a slope, it could even be done passively with Fmods (least versatile, and you'd want to verify that they work as expected in your setup). Worst option would be implementation by a passive crossover at the speaker level, very low frequency means big expensive components, and more of them the steeper the slope you desire. Analog solutions almost certainly won't have the ability to delay for sub placement, although fancier units might have a phase control for integration with the mains.
This is a little over my head. So I can set a HPF with built in DSP with a berry amp. When it comes to sub placement, they will all be directly under the TV, downfiring. This can't be changed for asthetic reasons. What do you mean when you say, "If you don't need too steep of a slope?" Are you talking about the HPF, or boosting low frequency? If I can keep the subs from bottoming out with the built in DSP with the berry amps than I shouldn't need anything else. If you are talking about boosting dips between 30hz and 80hz I might need something more advanced than the built in DSP?