4-18 cubic ft. flared slot ported build using 4-B&C 21DS115-4 Drivers - Page 8 - AVS Forum | Home Theater Discussions And Reviews
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post #211 of 403 Old 04-19-2017, 06:21 PM
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There's a lot of other things going on like she likes work out and mentions getting a trainer that her place has offer for not to much more money for a month so I said do it and if she asks me to do something around the house I do it so nothing can be held over my head. Happy wife happy life. I work a lot of overtime to which helps.
Yep this is too true, I just don't ask what that photography session for the kids cost and everybody's happy. Also, how are you going to get a forklift into your basement to get these 2 into position?
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post #212 of 403 Old 04-19-2017, 06:50 PM
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My wife never even ask what thing cost or why I am doing it. She just says, it is loud enuogh, lol. She is smart enough to figure if I am buying more audio gear, there is room for something she wants.
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There's a lot of other things going on like she likes work out and mentions getting a trainer that her place has offer for not to much more money for a month so I said do it and if she asks me to do something around the house I do it so nothing can be held over my head. Happy wife happy life. I work a lot of overtime to which helps.
Myself and the Mrs. have a great agreement between us....... I won't talk about the SHOES ( http://shop.nordstrom.com/c/christian-louboutin-shoes) if she doesn't talk about my audio gear. She has 15 or so just from this designer!!!!

I think it's fair.....
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post #213 of 403 Old 04-19-2017, 06:52 PM - Thread Starter
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post #214 of 403 Old 04-19-2017, 06:53 PM
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Ya agree
@eng-399

I just don't understand how UGLY shoes are $1K!!
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post #215 of 403 Old 04-19-2017, 06:56 PM - Thread Starter
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post #216 of 403 Old 04-19-2017, 07:08 PM - Thread Starter
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This is the graph of what's coming very soon. Once this build is done my new Nearfield ported box will be in the works. 2-10 cubic ft wedge boxes slot ported to 17hz. with 6-15's loaded. I'm hoping this will be a close match for the B&C 21's since there all going behind the last row. Here's the graph... I hope this should be enough fire power behind the chairs.
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post #217 of 403 Old 04-19-2017, 08:38 PM
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[QUOTE=eng-399;52373297]This is the graph of what's coming very soon. Once this build is done my new Nearfield ported box will be in the works. 2-10 cubic ft wedge boxes slot ported to 17hz. with 6-15's loaded. I'm hoping this will be a close match for the B&C 21's since there all going behind the last row. Here's the graph... I hope this should be enough fire power behind the chairs.[/QUOTE

If it is not, I don't know how you will stay seated but, maybe that's the goal, lol.
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post #218 of 403 Old 04-19-2017, 10:28 PM
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My wife always asks "where are you getting the money?" "better not be spending the tax return money!" Last year I spent $900 on a great telescope deal and she's still mad because I didn't consult with her first. Heck, I'm 64 and don't have 10 years to save up for stuff. I'm waiting on some money that should be coming in soon. I'll pay off a few medical bills and then advance my audio and astronomy hobbies some more.
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post #219 of 403 Old 04-20-2017, 11:40 AM - Thread Starter
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post #220 of 403 Old 04-20-2017, 12:10 PM
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The bar is looking awesome!
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post #221 of 403 Old 04-20-2017, 12:12 PM - Thread Starter
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post #222 of 403 Old 04-20-2017, 03:11 PM
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All looking good Eng-399. I am excited to get your opinion on how they sound.
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post #223 of 403 Old 04-21-2017, 02:01 PM - Thread Starter
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post #224 of 403 Old 04-21-2017, 02:04 PM - Thread Starter
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post #225 of 403 Old 04-21-2017, 02:16 PM
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Hope you have LED bulbs. You're gonna need em. I went through a CASE of halogens.
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post #226 of 403 Old 04-21-2017, 02:36 PM - Thread Starter
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post #227 of 403 Old 04-21-2017, 02:38 PM
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Originally Posted by eng-399 View Post
I don't but now after you said that I'm going to shop for some. Great idea Rob
I've went through a lot of bulbs trying to get good color without any of the common problems. The hyperikon's at 2700K are my current choice. Good CRI, dimmable as well.
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post #228 of 403 Old 04-22-2017, 02:17 AM
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Ya thanks for that also. I wont have the power you guys do but I would rather be safe than sorry on bulbs.

Was that volume of bass in the video from the pair of 21's or what was the setup?

Reminds me how much better music can be with a lot of bass on the kick drum. Not a big Metallica fan but some songs sound great. Also reminds me of going into GC and getting asked to leave. Three of us were playing in a large open room. Friend went to play on electric drums with an 18" sub. Guitarists was on a dual 12 setup and we were jamming. We were just playing fun stuff from RHCP to Slipknot. I guess we just played for too long.

Anyways love the videos. Hows work been? Also liked your uploads you had on the large engine breakdown.
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post #229 of 403 Old 04-22-2017, 05:59 AM
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The final 2 boxes are looking great. Did it ever rain dust with your previous setup? If not, do you think that the output of just 2 of the new subs is greater than your 4 previous 18's? That is remarkable and scary since you have 2 more coming soon!


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post #230 of 403 Old 04-22-2017, 07:17 AM
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Originally Posted by DaveyK View Post
The final 2 boxes are looking great. Did it ever rain dust with your previous setup? If not, do you think that the output of just 2 of the new subs is greater than your 4 previous 18's? That is remarkable and scary since you have 2 more coming soon!


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Im sure there is a nice output increase with a driver that is more sensitive, handles more power, and has a larger surface area.
Not only that but he has also in the same time upgraded mains and near field subs.

It could be settled dust from inside the light fixture, the output causes the light to move and become loose is shaking that collected dust off. If it was drywall, then the entire room floor should have drywall in some collected areas at least.

The other great thing about the additional 2 subs is not just the (est.) 6dB gain, but less power consumption at the same output levels, and much less distortion.
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post #231 of 403 Old 04-22-2017, 08:14 AM
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I don't but now after you said that I'm going to shop for some. Great idea Rob


Hey Mike I had some buzzing in my setup caused by LED bulbs. My lights take GU24 tube lights so my option is led or fluorescent. There is only two led versions and they weren't dimmable and buzzed. The fluorescents were better. I also had a temporary light in the closet and used an IKEA led bulb in it, also buzzed and caused a hum. I'm sure this isn't universal, but it happened to me.


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post #232 of 403 Old 04-22-2017, 08:19 AM
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I have some roller marks on the box so it looks like I need to sand the baffle down and give it one more coat. Almost there...


Hey Mike how are the braces attached to the walls? They are MDF right? For what it's worth when I last built boxes it was suggested to me that the braces should be screwed and glued instead of nailed and glued. I wonder if there is a small disconnection and a screw and some injected glue around the loose brace would fix it. Of course then you have a screw to patch and repaint over.


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post #233 of 403 Old 04-22-2017, 08:33 AM
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Hey Mike how are the braces attached to the walls? They are MDF right? For what it's worth when I last built boxes it was suggested to me that the braces should be screwed and glued instead of nailed and glued. I wonder if there is a small disconnection and a screw and some injected glue around the loose brace would fix it. Of course then you have a screw to patch and repaint over.


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I know that a properly glued joint is stronger than any screw or nail. Screws will pull the joint together better for the glue to set up. Nails are good if you clamp the joint first. If you can cut the bracing for a friction fit you shouldn't need nails or screws. Though I would feel more comfortable with a screw at each end.

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post #234 of 403 Old 04-22-2017, 10:53 AM
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This discussion came up before and some testing commenced. The glued and screwed was stronger than just glue. Clamping was used in all cases. The test only looked at braces and the argument was that maybe the small surface area of the brace didn't allow for a strong glue joint. I suspect that a peg with glue would be the strongest. What do you think?


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post #235 of 403 Old 04-22-2017, 06:36 PM - Thread Starter
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Ya thanks for that also. I wont have the power you guys do but I would rather be safe than sorry on bulbs.

Was that volume of bass in the video from the pair of 21's or what was the setup?

Reminds me how much better music can be with a lot of bass on the kick drum. Not a big Metallica fan but some songs sound great. Also reminds me of going into GC and getting asked to leave. Three of us were playing in a large open room. Friend went to play on electric drums with an 18" sub. Guitarists was on a dual 12 setup and we were jamming. We were just playing fun stuff from RHCP to Slipknot. I guess we just played for too long.

Anyways love the videos. Hows work been? Also liked your uploads you had on the large engine breakdown.
I had the avr level set at -12 or -13 I think I normally go up to +3 -+5 for heavy bass demo's so there's plenty left. Playing at Guitar center had to be a blast! I play guitar to but haven't picked it up that often in the past few years. I can only imagine how fun it was playing psychosocial or something else by slipknot in the middle of that place.
Works been good I messed up my knee once again thursday doing some pipe work to that engine...so I'm back wearing my knee brace again. Glad you liked the video's it's fun seeing different things and how they work.
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post #236 of 403 Old 04-22-2017, 06:41 PM - Thread Starter
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Originally Posted by DaveyK View Post
The final 2 boxes are looking great. Did it ever rain dust with your previous setup? If not, do you think that the output of just 2 of the new subs is greater than your 4 previous 18's? That is remarkable and scary since you have 2 more coming soon!


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No this never happened before. The sensitivity of these subs is amazing with output. I feel these two are more powerful than my last four subs. I was talking to Jeff P today from JTR in his demo room about the same thing. Ya 2 more going in it should be fun!
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post #237 of 403 Old 04-22-2017, 06:45 PM - Thread Starter
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Hey Mike how are the braces attached to the walls? They are MDF right? For what it's worth when I last built boxes it was suggested to me that the braces should be screwed and glued instead of nailed and glued. I wonder if there is a small disconnection and a screw and some injected glue around the loose brace would fix it. Of course then you have a screw to patch and repaint over.


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I don't know but I think I'm going to pre drill and add a few screws inside to a few braces I can get to and also apply more pl to everything. There's a lot of energy inside these boxes the noise wasn't there before so something came lose inside.
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post #238 of 403 Old 04-22-2017, 06:54 PM
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post #239 of 403 Old 04-22-2017, 06:55 PM - Thread Starter
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4-18 cubic ft. flared slot ported build using 4-B&C 21DS115-4 Drivers

Axpona 2017. Today was fun!
300,000.00$ for the pair it also had a 12" um sub in the back of it lol.


JTR baby!! Jeff P what a nice guy and easy to hang with, his room and Mark Seaton's were my two favorite of the show.

Emotiva had a really cool room with a ton of gear.

Legacy audio love these speakers to but can't afford them

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post #240 of 403 Old 04-22-2017, 06:58 PM
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Thanks for the pics I've been checking the JTR thread and nada. They are slacking over there.

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