Another subwoofer GTG, Southern style - Page 5

If I can get some one to help me load up my ED A7S-450 I guess I could bring it also. I don't mean one of you guys. I know you wanted to limit the subs, so let me know.

I do not need EQ to get down low since I use a ported design. I am just not going to test a ported sub with out a HP filter. A HP filter is a separate piece of equipment if you use a pro amp and not something built into a sub as part of the design. Now I do not think that you guys were planning on going that route, but I did want to let you know that I would not test my sub under those conditions.

You miss understood. I plan on being there and bringing my Shiva. I just would not be willing to test my ported sub without a HPF. My post was just to let you guys know how I felt if you took Bossobass's suggestion of not using a HPF for testing. I have also offered to bring my ED A7S-450 with 1,300 watt amp since you said you wanted to hear some commercial subs. Just let me know.

Bosso was mainly referring to my comments about EQing the subs individually. We will skip this and do a general EQ, if it is needed, to correct for the general room response effects. For instance if there was a bad peak at 50hz that could be padded down a bit. We won't go trying to boost nulls either, or getting anal about getting a super flat response, only cutting peaks if there are a few that need addressed. My comments only pertained to sealed subs only as far as boosting is concerned.

Nobody is going to be subjecting any sub to anything that it's owner is not comfortable with. I plan on doing the listening eval's at a set, moderate level that even the smallest sub there can handle. I would like to push some of the bigger subs as well to see how they do at higher levels and have some fun too, but we'll have to figure that out. Obviously if you listen to the material at higher volumes with some of the subs it will affect things.

There will be a HPF on the ported subs. I wouldn't run one without it personally. I don't think Bosso suggested that necessarily. He doesn't hate ported designs THAT bad.

mjg100, Brandon,
What are your subs tuned to? Do you have an EQ unit to boost the low end on the A7S-450 mjg100, or do you run it dry?

I only use Audyssey with the A7S-450. The HPF was the only thing I had a problem with in Bossobass's post and that is why I highlighted it in my first response. To be on the safe side I would like an 18Hz HP used on the Shiva-X.

Is 18hz the tune on your Shiva and it's 6.5ft right? We'll use REW at a very low volume setting to help set the Rane's HPF up right for it.

Thanks. My room is getting closer to getting complete (for awhile) I received my NHT 116 drivers and switched them out with the NHT 075 drivers that I had in my MBM's/bass bins. Now I have three MBM's/bass bins under my three front speakers, Shiva-X in back right corner and 2.0 CF dual 10" (NHT 075 drivers) in back left corner. I am waiting to order one more driver and amp for a surround sound sub and that will do me for a while. I need to re-calibrate everything again. I am going to try and find time to do that this week end. Here are a couple of pics:
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I have not had more than a few minutes of listening and that was with all five subs going and not calibrated. It is going to take some time to calibrate all of this. I did download some tones for calibrating, 40 to 80Hz and full range. I was going to put on some music and listen to the subs, kicking different subs in and out to hear the differences but the upstairs HT room is right off of our bedroom and my wife went to bed right after dinner. She said she had a very hectic day today. I thought that it would be in my best interest to just fire up the downstair projector and watch a ball game. Did you watch my Toppers play any of their games? We lost in the second round to Gonzaga. Gonzaga made a last second shot to win.

I added three 1 CF sealed subs to my front three speakers. I am using them from 40Hz to 150Hz. (DIY)
One 6.5 CF ported Shiva-X for 50Hz and down. (DIY)
One 2.0 CF sealed 30Hz to 80Hz. (DIY)

I have an old NHT SW2Pi that I am going to place in the back of the room and tie into my surround speakers. Then I will be running AVR with all speakers set to large and LFE + mains. I am currently running LFE + Mains.

I am just about to that point since my room is 5.1. I am going to try a single sub for the back channels since I have a spare NHT SW2Pi not being used.

I did some calibrating today and listened to a few movie scenes. Huge difference with the Shiva taking care of the low (50Hz and down) stuff, the high output sealed dual 10" taking care of the 30 to 80Hz zone and the NHT 116's kicking the 40 to 150Hz zone. Lots of head room now. I calibrated so that zero on the AVR is 75db and when I played Transformers I was hitting 109db peaks when the AVR was set to -5 and the sound was clear and clean, no strain. I have 20 more clicks on the AVR, but it already had my ears at the ringing point so I did not go higher. Before when playing Kung Fu Panda you felt the deep bass stuff and some of the blow impact, but now you feel the thud when the spears hit the ground and hit the face of the cliff in the Tia Lung escape scene. When the arrows rain down on Tia Lung it will make you jump. When Po trains with his master you can feel the bamboo staff hitting him.

Before you felt some sound pressure from the helicopter rotors in Transformers, but now there is a lot of sound pressure build up in the room. When the big guns fire in Transformers you can feel the concussion from the guns. I had thought about getting some bass shakers, but no need now.

I might not be able to be there as early as I wanted to. I coach my sons soccer team and we have a game at 10:15 AM on the 18th. Since schedules have not been sent out yet I am trying to get that game changed to 9:00 AM. That way I can leave right after the game. Should take me about 1.5 hours to get there.

brandon, even though there are lots of comments about how you could do things different or better, there are lots of us out here that are very excited and grateful that you are hosting this event! i just thought some props were due.

can't make it this time, but i will be following along online. your comment about being in it for the knowledge is spot on. everybody loves shootouts, "this one vs. that one", etc. but in the process, we all learn alot.

its really cool to see folks (props to ricci et al) step up to help make this event a success.

Well I have scuba checkoffs that weekend, but all this talk about subwoofers have made me all giddy and want to push them off . I'm about 3.5 hours away and think I am going to try to make it. Do we have a timeframe that things are going to get started/end? Just curious since it is a drive and wondering if I need to head up the night before or what since I have a friend that lives by Brentwood.

I'm in the market for a new sub and am really looking forward to hearing some DIY options and commercial subs as my audio knowledge is weak to say the least as my calibrating skills know how to start MCACC.

I know you were wanting to bring commercial subs and all I have is a Bic H-100, but if I am able to come I would be willing to bring it. I know it won't touch any of the subs there as it is in a far lower price range, but let me know and then we can have some comparisons of that.

I do it for the love of the game. Actually I do it so I can keep learning and have fun. Plus it's cool to hear a bunch of equipment I never have before.

That would be great to be able to compare subs against others. I've bought practically all of my AV equipment based on this forum alone. There really aren't any stores anywhere close to me who carry any decent kind of equipment. I did audition quite a few speakers before I bought my Ascend Sierras for the LCR, but bought those blindly on reviews and I'm glad I did. I went to Nashville and Murray to listen to speakers there.

This whole DIY route seems really interesting. I'm definately going to be picking people's brain. After reading all the rave things about the LMS and the AV15 c 2x PR I can't wait to hear them. I'm not much of a handy man, but I have a friend who makes cabinets for a living and has a CNC machine so I should be able to get him to make me a box pretty easily/cheaply if I need one.

I will do that brandon! I have to first get the $$ to be able to afford such a build since I just spent nearly $800 on the Pio SC05.

From the WI shootout everyone loved the LMS. I contacted Ricci offline and has been a big help regarding equipment I would need to build the sub. I'm just curious the physical size of the completed sub as my living room is also my ht room and size is a consideration.

Excellent. Although 4 foot is too big for my area unfortunately, I'll start reading the DIY option route more so I can already have a basic understanding. I like some of the Mael-X builds and they seem about as big as I would be able to fit...hopefully someone will be able to bring one of those as well.

I am looking forward to hearing some of these other subs. No place around here to listen to any good subs. I do not know very many people that have HT's. My brother has an HT, but no sub. He does have some fantastic mains, Meridian DSP-6000's (total of 8-8" drivers). The only other places that I get to hear HT systems is when I go to parade of homes and none of those offered any real performance. Most of them feature little tiny open back in-wall speakers and a small sub. They show off these little boutique HT's in these new homes like they are the greatest thing and none of them have much performance.