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EricHaven
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PostSubject: My new Seismic Audio cabinets   Fri Nov 13, 2009 6:51 pm

I cannot tell you Guys just how much of a pleasant surprise these cabinets have been. From the rave reviews I read before I bought them, I knew that they would be a good choice, but I had NO idea just how much I was going to enjoy them! The 1x15 handles every bit of distortion signal I can throw at it, and the 2x15 is absolutely pure thunder! The only thing I might do is add ports to the 2x15 to get even more thunder out of it, but I have no complaints about how it sounds as it is. The guys I jam with now are really impressed with them, and couldn't believe that I paid so little for them. They tell me all the time "that rig of yours sounds amazing!" and I could not agree more.




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Chowderboots

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PostSubject: Re: My new Seismic Audio cabinets   Fri Nov 13, 2009 10:56 pm

Killer! I really want a 2x15 or 4x15 cab one of these days. It's great that yours is working out so well for you and for so little!
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PostSubject: Re: My new Seismic Audio cabinets   Sat Nov 14, 2009 11:56 am

i'm actually really suprised that 2X15 isnt ported. you'de think it would / shud be.

lemme chek out the speaker cab calcualtor software i got and see what it recomends .............

winISD beta.

with the ruff spects that sizemic gives at its website, i calculated with specs close libraied with the eminence delta 15" ........

a proper vent (port) would require 6 ports at 2" diameter and 1.86 depth (tube) to yield a vent mach of .07 to be tuned close to accurate.

weird, never used dimensions like that, but any parameters adjusted + or - like # of ports, diameter or shape made the vent mach drop below .05 or into the negative. ideally a vent mach of .1 or close to it is desired to be tuned properly.

dont know how these calculations are calculated, or not following them what would result, but if you had a negative value vent mach ... would it "suck" air??? (2 vent ports at 2.5" flush with the cabinet front vent mached at -.28.)

from what these calculations tell me, i'm either way off ... or you wouldnt benefit from porting.

i've also used cabinets with the whole bottom as a port vent channel .... maybe this is where this comes in handy.

overall tho ... like eric sez and endorses, the reviews on these cabinets is great. i love my 15" and wanna replace the black widow with a more powerful eminence. i may just leave it and buy a new sizemic 2X12".
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EricHaven
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PostSubject: Re: My new Seismic Audio cabinets   Sat Nov 14, 2009 12:18 pm

Let me see if I have this right, MadMike. I would need to cut 6 ports into the cabinet, and each port would have to measure 1.86" deep and 2" in diameter, correct?

Isn't there a way I could simply cut 2 ports into the thing? scratch

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PostSubject: Re: My new Seismic Audio cabinets   Sat Nov 14, 2009 9:18 pm

This sounds like a question that would best be handled by someone like greenboy or Bill Fitzmaurice on TB.
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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 4:12 am

hey ... thats what the software told me.

i think the math worked out that with 2 holes ... they would need to be 7", or something nutty like that and it would yield the mach still under .1. i'de need to run the numbers again ... i'll do it tonite.

i think its one of two things ..........

either a cabinet like this (the physics of it) wouldnt benefit from ports ... how, positive or negative pressure, i'm not sure or ........

the software just doesnt handle the figures with 2 X 15" speaker cabinets. the thing is a beast.

i would definately consult someone who understands the physics before you start cutting holes in anything!
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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 4:28 pm

If you could re-run the numbers for me, that would be awesome, MadMike. I'd rather only cut two holes into the thing instead of six if at all possible.

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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 4:33 pm

I know how you feel about Talkbass, but I really would recommend posting your question there. A good number of TBers know a hell of a lot about this kind of thing and you could get your answer really quickly.
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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 8:52 pm

or how about i do some research to find where you can download the software on your own eric ... cause i came up with the same weird numbers. the software is a free beta version ... i just gotta find the url.

or keep askin around elsewhere ... let us know what you learn.
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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 8:56 pm

ooh, ooh ... that was easy!

http://www.linearteam.dk/
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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 16, 2009 9:01 pm

I gotta say, every time I look at this thread, I jones all over again for a 2x15/4x15. I was watching some footage from the Who at the Isle of Wight and John's stacks look SO awesome...



I'll check out that software as well, Mike. I've got those two Peavey 1810 cabinets and they're sealed enclosures. Since I've got two, I might look into turning one into a ported cab and see how it works out. I've heard of people making ports in 1820s to good results.
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PostSubject: SEISMIC SALE!!!   Wed Jun 20, 2012 4:08 pm

Seismic is having a 20% off sale NOW and that plus the free shipping has two 4x8 cabinets coming here to replace my 8x8(SWR Henry aka Honey I shrunk the SVT) that is used only on LARGE stages with ACME B2's vertically on side of it. Yes, I got tired of lugging a 110 pound cabinet even though it is rarely used. The plan is to put one 4x8 on top of 2 ACME B2's side-by-side. The preamp is Line 6 BassPODXTLive->SansAmp RBI(for fine-tuning tone)->dbx 166xL(speaker protection).

If anyone wants Seimic's on sale, they're here with coupon code "Guitar20" .
https://www.facebook.com/?sk=lf#!/seismicaudio
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PostSubject: Re: My new Seismic Audio cabinets   Fri Nov 22, 2013 5:52 am

I'd just like to chime in say that Seismic Audio is practically in my backyard. (ten minutes from my day job)

I've bought a lot gear from them. I live so close, all my stuff is delivered next day FedEx for FREE! How sweet is that?

My guitar player and I have been to their place. We met Mr. Travis who was super nice and showed us around a bit.

He even showed us this monster 21 inch prototype subwoofer they designed and built but didn't produce because they couldn't find a shipper who would touch such a Godzilla of a thing! affraid

Truly great guys working there.

hip63 Razz
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PostSubject: Re: My new Seismic Audio cabinets   Sat Nov 23, 2013 11:16 am

That's really cool you're so close to them. I still have my 2x15, and it works great.

hip63 wrote:
He even showed us this monster 21 inch prototype subwoofer they designed and built but didn't produce because they couldn't find a shipper who would touch such a Godzilla of a thing! affraid
Looks like our selection of subs has been added to. Carvin is also making a 21" woofer now. Can 25" be far behind? Laughing 

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PostSubject: Re: My new Seismic Audio cabinets   Mon Nov 25, 2013 8:29 am

I'm STILL using Eric's old 1x15 ( as a car cabinet )....lol
blew up the woofer using it as a bass rig bottom with my crown and replaced it with a MCM item, but for the 100 watt amp I have in my car it is perfect.

I also have a 2x10 SA, and a full PA of SA speakers 2 18"subs, 4 15" mains, 2 dual 15" mains and plenty of their DOTD specials.

these things have been beat to death with my crown amps, rain, heat, and cold and never skipped a beat yet.
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PostSubject: Re: My new Seismic Audio cabinets   Tue Nov 26, 2013 6:20 pm

amimbari wrote:
I'm STILL using Eric's old 1x15 ( as a car cabinet )....lol
Laughing 

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PostSubject: Re: My new Seismic Audio cabinets   Fri Apr 25, 2014 5:50 pm

Finally bought one of these 2 x 15's with a 10% off coupon to simplify my BOSE setup and make it sound better!
Now, when we are using BOSE systems, only ONE 66 lb cab has to be plugged into the BOSE PS1 instead of THREE 30 lb cabinets, a booster amp, another power cord, and a patch cord(PS1 to booster amp).

We live in the boonies of south Texas so it was tried out at stage volume pointed at the east pasture from our home. The BOSE sends 40~140 Hz @ 250W to it but since it's 99 dB/1 watt @ 1 meter....it was moving a heck of a lot more air than SIX 5-1/2" speakers(or whatever BOSE puts in them). The 1st gig-test is tomorrow in Tomball, Texas at a benefit event for Boys and Girls Harbor. I don't think our drummer will say "I can't hear you" anymore since this will stand up next to his floor tom. He'll probably order 1 or 2 so his kick drum will sound real and he'll be able to feel it.
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