Leimahmood

5 minutes ago, peniku8 said:

yes: room eq

So box dont need any eq just need now room eq right ??

i have four skram box in my theater room and two port block tune to 20hz iss there any specially eq needed the driver used is b&c 21SW152 4ohm

Hi every one.

i have some jbl 2279h drivers 18inch

is it useable for home theater 20hz bass or 25hz box like marty

Here are the specifications 

On 11/22/2022 at 6:24 PM, klipsch said:

Both! Which one fits better in your space? Which one is easier / cheaper to make? Are you only making one sub? Do you already have drivers? 

i have one pair of skram box with b&c 21ds115 4ohm

So now i purchased some lavoce 21 drivers so thinking for ckram

is there any cnc cut list for mdf sheet 4feet x8 feet

For movies

Skram vs  ckram

Which one is good 

Hey every one hope every think is going well

Do 8x stereo integrity ht18 v3 (marty box)

Perform well then

The 4x lavoce 21inch (devastator) subwoofers

Room size 17 feet wide and 21 feet length and 12 feet high dedicated for home theater

How the mid  and ultra low basses of 8x 18s compair to 4x 21s

Only for movies

Thanks

Any one have 8x4 feet 18mm mdf sheet file for cnc machine for skhorn kindly share bcz here in our country there is no plywood 5x5 feet thanks

Logitech z5500 driver vs polk audio hts10 woofer

What a shame polk

On 7/7/2019 at 8:34 AM, dgage said:

one complete second on the way

On 7/7/2019 at 8:34 AM, dgage said:

final my horn box is in his last stage

On 7/7/2019 at 8:34 AM, dgage said:

On 7/7/2019 at 5:41 PM, Ricci said:

I posted the possible vent tunings with these a few pages back. With 1 vent open it should be around 14Hz. In a room for HT, with a lot less overall headroom needed than for PA work this might be the ticket. I think 2 vents open was going to be about 19Hz.

here in our cuntry only mdf avilable and the size is in pic and can i make skram with this size mdf

 

9 hours ago, m_ms said:

So, in the case of your initial and specific request aimed at the Skrams it's not really about movie playback capabilities as such (a different inquiry altogether, it would seem), but simply whether they kick a** from 30-120Hz with a suggested (and, it seems, fitting) driver, the B&C 21DS115-4. From what I'm able to assess the Skrams do exactly that; being 25-120Hz monsters at a relatively modest physical size, not least in light of them being fitted with a 21" driver, close to or more than 100dB sensitivity and hitting 25Hz quite comfortably. For your purpose I'd leave all ports open, or close no more than one per cab. Traits on paper that, if it weren't for my MW's, I'd have a pair build to my own setup in a heartbeat. 

EDIT: more fittingly I may consider poster @dgage's advice of either not being in the need of the Skrams, or use them solely with, say, 2 ports open. Personally I'd go with the latter option 

if i make a mbm type box iss it fine

3 hours ago, Ricci said:

I posted the possible vent tunings with these a few pages back. With 1 vent open it should be around 14Hz. In a room for HT, with a lot less overall headroom needed than for PA work this might be the ticket. I think 2 vents open was going to be about 19Hz.

well ricci my main need is 30hz and up to 120hz i need tiet punchy basses for ultra low i use an other subs drivers

7 hours ago, dgage said:

Depends on what you’re looking for.  I’ve measured my 24s in many rooms and they’re flat to 7 Hz in-room with over reference level output.  The 21s won’t achieve that in a Skram but they’ll run away from my 24s above 25Hz I’m sure.  Some don’t worry about under 20Hz content while I will never go back to subs that can’t provide solid 10 Hz output.  So it really depends on what you want and your circumstances.  If you’re on concrete and can’t put down wood, you won’t get as much tactility so it may not be worth chasing under 20Hz.  But if you’re on a wood floor, the deep bass imparts some really nice tactility through the floor during movie explosions.  Also depends on the size of the room you’re trying to cover and number of Skrams you’re building.  4 Skrams in a small room like some seem to be doing will probably have quite a bit of under 20 Hz output but would have so much headroom above 30 Hz that wouldn’t get used if under 20 Hz is the goal.  So just depends on the goals as there are many, many ways to get there.

 

One other thing to note is I recommend multiple “lesser” subs (18s instead of 24s::)) in a room to get more even bass.  If you have a sub, turn 1 (only 1) on and walk around the room while playing.  You’ll hear some areas, especially the corners, where the bass is stronger and maybe boomy while other areas don’t have as much bass.  This is your room interacting with the bass waves.  To combat this, Harman did extensive testing and found 4 subs placed in the 4 center walls of the room was about the best (diminishing return over 4 subs) followed closely by 4 subs in the corners.  So if you’re only planning 1 uber sub, I’d strongly suggest against that and to go with multiples so you’ll get more even bass.  Note that long rectangular rooms may need a couple of fill subs though room simulation software would need to be used to identify this.

well i m not ture 20hz lover

i need good punchy bass

recently i make a box its 18cubic feet 16hz tune it good around 15 to 70hz but after that its show lack mid basses like from 80 to 120

so that y my eyes on skram and i have a pair of 21ds115 4ohm

room is 13.5feet wide x15.5 lengthy x8high and fully seal room no window etc

are those skram are good in movies with 21ds115 4ohm driver

and my mind was on tekton 21sub

its 30x24.5x20 inch with one port

and what the port size is any one know ?

hope everyone is fine 

last time i make a box for my dual b&c 21ds115 4ohm and i m very disappointed from the result the box is 18cubic feet and tune to 16hz and its realy very wrak response in punchy basses

now i need a small box with good punch bass 

any hlep would be good

ok guys i figure it out

it all the lose screws so the driver is not tiet and it doing thing worse in bass

i recently diy a subwoofer with b&c 21ds115 4ohm

amplifire is qsc rmx5050

its lack in rumble like basses some time in punch too

i noticed the subwoofer box is too much vibrating during these bass

here are some pics and mu subwoofer cut list

On 2/24/2019 at 4:40 PM, Father Francis said:

I hope you can see ,I can see the port size is missing it's 22cm wide/high whatever you want to call it 

well here is the bad news i got the 21ds115 4ohm

i have a deal of 12x polk audio hts12 raw driver

pair is around 100$ so for all 600$

can i make a ztx 3x12 like subwoofer

7 hours ago, Father Francis said:

now that all depends on you the SW152 can handle more shit than the DS115 , I'l try get time draw something out for you to make thing abit 

want it for movies only

23 hours ago, Ricci said:

If the price for you is the same get the B&C no question. I wouldn't even think twice.

and whts ur thoughts on 

b&c 21ds115 vs 21sw152 littel diference in price ds is littel cheap

14 hours ago, Ricci said:

If the price for you is the same get the B&C no question. I wouldn't even think 

 

ok once i get them will start with ported box