Members rpsands Posted February 26, 2009 Members Share Posted February 26, 2009 So, Marc cut out the baffle wrong (for a 3060), and had to build a new cab to fit the 8" driver: DOH. So we're behind schedule another few days. Anyway, at least I've got some pictures to keep me occupied. I figured I'd share. Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 I did shoot him an email and ask if he was going to cut holes in those braces Greenboy is a genius. Also, with the new baffle the cab came in with an extra 1.5" of height or so, which means another .3 cubic feet about, which I approve of. I was always a bit shaky about the small volume. Little more can't hurt. Does that bracing look like uhh, aircraft bracing to anyone? Looks like it is pushing the front and back out a little, but there's no bracing side to side due to the position of the mid driver as far as I can tell. Seems like bracing along the back wall would have made a lot of sense here. Link to comment Share on other sites More sharing options...
Members JeffBass Posted February 26, 2009 Members Share Posted February 26, 2009 Is that two 12" speakers and an 8" speaker goin in there? Tweeter? 4 or 8 ohms? Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 It's two Kappalite 3015LFs, an Eminence 8" closed back mid, and a soft dome tweeter. 4 ohms. Link to comment Share on other sites More sharing options...
Members JeffBass Posted February 26, 2009 Members Share Posted February 26, 2009 It's two Kappalite 3015LFs, an Eminence 8" closed back mid, and a soft dome tweeter. 4 ohms. WOW. That's gonna be a monster cab. No need for a stack with that beast. I imagine it's going to be rated at what, a thousand watts? What kinda music do you play? What kind of amp are you going to drive it with? Dome tweeters are sweet, very smooth. Too bad you don't live in Chi-town, I'd like to hear that thing. Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 I will be running it with my Mesa 400+ -- or alternatively, the NeoPak if I feel like it. Should come out to about 75lbs -- 35" tall, by 23.5" wide by 17.5" deep. It's coming with tilt back casters, a kick plate, slide rails, and the luggage rack handle thingy. I expect I will be able to move it out and slide it into my station wagon with ease. Assuming the band ever plays out. My reasoning was that going with the two 3015s would alleviate me ever having to get a bigger cab for anything, and it barely cost the cost of the speaker to go with a 215/8 instead of a 115/6. I play all sorts of crap but band-wise, mostly 90s alt/rock, proggish stuff. Oh: The word is it will actually take all 900 watts or some odd it's rated for, but if not it should be close to that. Link to comment Share on other sites More sharing options...
Members JeffBass Posted February 26, 2009 Members Share Posted February 26, 2009 "It's coming with tilt back casters, a kick plate, slide rails, and the luggage rack handle thingy". That's very cool. Didn't realize Marc did that much customization. "My reasoning was that going with the two 3015s would alleviate me ever having to get a bigger cab for anything". I'd say that's a very true statement! You're gonna blow your band off the stage! Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 26, 2009 Moderators Share Posted February 26, 2009 You don't really want any unbraced span of more than 8". You have 33.5"x16" spans that are entirely unbraced. You want more internal volume if you ever intend to make use of the full power/range of the 3015LFs, but without a huge power amp you'll never come anywhere near the extremes a well designed cab can deliver so it isn't much of an issue I guess. Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 Yeah, I am a little dubious about the bracing in that thing. It looks like it's kind of half-assed. I think I'll call Mark up before I let it go. It's really not that much work to put in the arch-shaped brace that Greenboy was using, which is quite slick. Hell, at least something on the side walls. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 26, 2009 Moderators Share Posted February 26, 2009 Yeah, I am a little dubious about the bracing in that thing. It looks like it's kind of half-assed. Par for the course. I'd love to see you get the cabinet you should get, which would at a minimum be properly braced along all of the panels. There are lots of reasons to be skeptical of this build and I would look closely at the bracing, the porting, the crossover design, etc. before accepting the cabinet. Dr. Bass has historically been unwilling to do things correctly, but you can always try your best. Link to comment Share on other sites More sharing options...
Members Bryan316 Posted February 26, 2009 Members Share Posted February 26, 2009 The way I see this rig, as long as the cab's sturdy enough to take a Mesa 400+, you'll be HORRIFIC loud at full volume! who cares what it COULD take, you won't want to try getting any louder than that amp can give you! Unless you pull another health insurance plan!!! Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 26, 2009 Moderators Share Posted February 26, 2009 The way I see this rig, as long as the cab's sturdy enough to take a Mesa 400+, you'll be HORRIFIC loud at full volume! who cares what it COULD take, you won't want to try getting any louder than that amp can give you! Unless you pull another health insurance plan!!! This is true, but these are two separate issues. Intentionally building half assed cabinets is offensive in its own right Link to comment Share on other sites More sharing options...
Members Bryan316 Posted February 26, 2009 Members Share Posted February 26, 2009 I was kinda responding to the 900 watt rating, not the structural integrity. Okay.... just cuz the Devil gave me an itch to be his advocate... ....according to these pictures, what would you want to see improved? Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 26, 2009 Moderators Share Posted February 26, 2009 I was kinda responding to the 900 watt rating, not the structural integrity.Okay.... just cuz the Devil gave me an itch to be his advocate.......according to these pictures, what would you want to see improved? As I said above, size and bracing. I'm also skeptical of the porting and crossover, but there aren't enough details to investigate. I make no secret of having disdain for sub optimal design and construction and Dr. Bass is one of the current poster children for that. It isn't just pure ignorance either, which oddly might be more acceptable, it is intentional corner cutting even in the face of easy opportunities to do it "correctly." I don't want to give the impression that Dr. Bass is alone in their approach, their approach is standard. I just unfairly expect more from a small company that has a real opportunity to do things right - especially when their customers specifically request it and understand it will cost more. Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 Just confirmed with DRB that they are doing side bracing on it Just showing the first steps. I didn't figure they would be that lazy as to not even brace the sides. Apparently they do it after the handles and all that jazz so that's fine. The crossover, I am still dubious about as well, but I will give that one the ear test. The main concern I have is the size, but I think that it will be close enough to sufficient that the tradeoff of having it be around 4-5" shorter will be sufficient for me. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 26, 2009 Moderators Share Posted February 26, 2009 The crossover, I am still dubious about as well, but I will give that one the ear test.The main concern I have is the size, but I think that it will be close enough to sufficient that the tradeoff of having it be around 4-5" shorter will be sufficient for me. It should all be fine. Link to comment Share on other sites More sharing options...
Members rpsands Posted February 26, 2009 Author Members Share Posted February 26, 2009 The way I see this rig, as long as the cab's sturdy enough to take a Mesa 400+, you'll be HORRIFIC loud at full volume! who cares what it COULD take, you won't want to try getting any louder than that amp can give you! Unless you pull another health insurance plan!!! I think it will be pretty crazy loud, and hopefully fairly even (although there will be some mid-frequency humps, nothing crazy on the low end like the schroeder). The interesting thing is with the way the crossover's setup, there will be a fair bump in the high mids on-axis and a dip off-axis, so I'm hoping that works out okay. Link to comment Share on other sites More sharing options...
Members Bryan316 Posted February 26, 2009 Members Share Posted February 26, 2009 on-axis humps in certain frequencies are very common. The idea of speaker beaming is quite common for guitarists with 12" guitar speakers. I could give you a link to a HUUUGE discussion about this, but I'll just give the Cliff's Notes version. When you listen to a speaker straight on, you are hearing the actual accurate output of the speaker. When you listen from the sides, you are hearing phase issues that negate certain frequencies and cause comb filtering and dead spots. Why? Because your ears are no longer equidistant from every point on the speaker. You're hearing sound radiating from the close side of the speaker, and then microseconds later, from the other side of the speaker. These frequencies coming at you with a slight delay is phasing. They're being negated in the air as they vibrate against each other. Most of the time, the phasing only happens up higher, above around 1200 Hz. Why? Because the tones have short enough wavelengths that your ear can actually hear those phase cancellations. Lower frequencies are long enough that your ear doesn't distinguish them. So beaming occuring when you stand directly in front of a speaker isn't because the speaker's blasting MORE highs... it's because standing at angles to the cab blasts LESS highs. There's a new theory and technique for taming these beaming effects, by making the speaker sound the same with the reduced highs in front, just like at the sides. It evens out the projection of your tone the way you hear it standing next to your rig, so somebody at the front row hears it exactly the same way you do, instead of getting their ears drilled with the beaming effect. I bought the fix, and I'm testing it after this weekend on my brother's 112 Mesa cabinet. We're planning to videotape and Youtube the whole process for the doubters. Link to comment Share on other sites More sharing options...
Members JeffBass Posted February 26, 2009 Members Share Posted February 26, 2009 Fascinating stuff. Glad to hear DRB is providing the extra bracing for RPS's cabs. For all the fine speakerage (a highly technical term), it would be a shame if the cabinetry wasn't up to par. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 26, 2009 Moderators Share Posted March 26, 2009 A month later and still no cabinet? Wasn't this one promised to be delivered a few months back already? Link to comment Share on other sites More sharing options...
Members 82Daion Posted March 26, 2009 Members Share Posted March 26, 2009 My 115 is entirely unbraced. Hmmmm. That aside, I'm interested in seeing if/how this turned out as well. I'm not sure how I missed it the first time around. Link to comment Share on other sites More sharing options...
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