AVS Forum | Home Theater Discussions And Reviews (https://www.avsforum.com/forum/)
-   DIY Speakers and Subs (https://www.avsforum.com/forum/155-diy-speakers-subs/)
-   -   (8) Ported Incriminator Audio Judge 21" build (https://www.avsforum.com/forum/155-diy-speakers-subs/2752513-8-ported-incriminator-audio-judge-21-build.html)

lukeamdman 02-14-2017 07:14 PM

(8) Ported Incriminator Audio Judge 21" build
 
12 Attachment(s)
Current dual-opposed sealed build with these drivers:

https://www.avsforum.com/forum/155-di...-21-build.html


I'm currently building 8 of these:

Outside dimensions with double baffle:

36" wide
28.5" tall
30" deep

(3) 8.5" x 2.625" ports. Port length is ~55".

Net internal volume: 11.72cu.ft


https://www.avsforum.com/forum/attach...5&d=1500303476

https://www.avsforum.com/forum/attach...7&d=1500303476

https://www.avsforum.com/forum/attach...9&d=1500303476

https://www.avsforum.com/forum/attach...1&d=1500303472

https://www.avsforum.com/forum/attach...3&d=1500303472


1/2" round over:

https://www.avsforum.com/forum/attach...1&d=1500303476


https://www.avsforum.com/forum/attach...3&d=1500303476

https://www.avsforum.com/forum/attach...5&d=1500303476

https://www.avsforum.com/forum/attach...7&d=1500303476

https://www.avsforum.com/forum/attach...3&d=1500303476

https://www.avsforum.com/forum/attach...9&d=1500303476

https://i.imgur.com/IGUTAGf.jpg


Tune came in at 14hz:

https://www.avsforum.com/forum/attach...1&d=1500303476



All 8 + the Othorns stacked behind the mains:

https://i.imgur.com/Kaqcg7T.jpg

lukeamdman 02-14-2017 07:14 PM

T/S specs for the drivers. I will add...I didn't secure/bolt down the driver when getting these parameters, and Ricci told me that will cause the BL to come in a little lower.


Re = 2.8983 ohms
Fs = 31.2837 Hz
Zmax = 64.4377 ohms
Qes = 0.5802
Qms = 12.3192
Qts = 0.5541
Le = 4.2938 mH (at 1 kHz)
Diam = 454.1638 mm ( 17.8805 in )
Sd = 162000.0005 mm^2(251.1005 in^2)
Vas = 142.7929 L ( 5.0427 ft^3)
BL = 25.7591 N/A
Mms = 675.7605 g
Cms = 38.3012 uM/N
Kms = 26108.8594 N/M
Rms = 10.7822 R mechanical
Efficiency = 0.7080 %
Sensitivity= 90.5184 dB @1W/1m
Sensitivity= 94.9278 dB @2.83Vrms/1m
Krm = 28.598E-03 ohms Freq dependent resistance
Erm = 784.948E-03 Rem=Krm*(2*pi*f)^Erm
Kxm = 272.943E-03 Henries Freq dependent reactance
Exm = 525.888E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 25.919 Hz
Ftest/Fms = 0.8285
Test Mass used = 308.6900 g (Equal to 61.7 nickels)
Test Mass (Ft=Fms*0.90) = 158.512 g (Add -150.178g for Ft=28.155)
Test Mass (Ft=Fms*0.75) = 525.592 g (Add 216.901g for Ft=23.463)

lukeamdman 02-14-2017 07:15 PM

3 Attachment(s)

eng-399 02-14-2017 07:20 PM

(8) Ported Incriminator Audio Judge 21" build
 
Wow 8 of these, your room is going to be insane. The bracing looks great in the cabinet. Subscribed

lukeamdman 02-14-2017 07:25 PM

Quote:

Originally Posted by eng-399 (Post 50765305)
Wow 8 of these, your room is going to be insane. The bracing looks great in the cabinet. Subscribed

Initial SPL testing with one cab indicates that with all 8 I'll be approaching 148-150db from 15-20hz!

Rowan611 02-14-2017 08:11 PM

Looking good Luke! I can't wait to come up and hear them.

stsand 02-14-2017 08:15 PM

Quote:

Originally Posted by lukeamdman (Post 50765457)
Initial SPL testing with one cab indicates that with all 8 I'll be approaching 148-150db from 15-20hz!

How big is your room?

Sent from my XT1575 using Tapatalk

stsand 02-14-2017 08:16 PM

Will be fun watching this come together. Subscribed.

Sent from my XT1575 using Tapatalk

Fattykidd 02-14-2017 08:18 PM

:eek::eek::eek::eek::eek::eek::eek:

Just WOW!!!

lukeamdman 02-14-2017 08:26 PM

Quote:

Originally Posted by stsand (Post 50766569)
How big is your room?

Sent from my XT1575 using Tapatalk

About 2,300cu.ft. 12'x23' with 8ft ceilings.

stsand 02-14-2017 08:48 PM

Quote:

Originally Posted by lukeamdman (Post 50766737)
About 2,300cu.ft. 12'x23' with 8ft ceilings.

Same size as mine. I've got two 21s, and it thumps pretty good in there. 8 is just mind blowing...

Sent from my XT1575 using Tapatalk

lukeamdman 02-14-2017 08:55 PM

2 Attachment(s)
Quote:

Originally Posted by stsand (Post 50767217)
Same size as mine. I've got two 21s, and it thumps pretty good in there. 8 is just mind blowing...

Sent from my XT1575 using Tapatalk

Two of these ported is producing more SPL from 12-20hz than all 8 could sealed.

These cross over to dual Othorns at around 30hz, so once these ported boxes are finished I'll be around 145db from 14-150hz:

https://www.avsforum.com/forum/attach...1&d=1500304241


Most I've hit in the room at the LP so far (I use the "max" value so I consider this 147db):

https://www.avsforum.com/forum/attach...3&d=1500304241

NC25T 02-14-2017 08:58 PM

Quote:

Originally Posted by stsand (Post 50766569)
How big is your room?

Not sure if that's the correct question


How close are your neighbors? :eek:

lukeamdman 02-14-2017 09:48 PM

Quote:

Originally Posted by NC25T (Post 50767393)
Not sure if that's the correct question


How close are your neighbors? :eek:

Fortunately for me my HT is completely below ground level. You can hear it outside (mostly noises from my house rattling) but I doubt you can hear it once inside one of the neighbors houses.

audiovideoholic 02-15-2017 06:36 AM

Quote:

Originally Posted by lukeamdman (Post 50768329)
Fortunately for me my HT is completely below ground level. You can hear it outside (mostly noises from my house rattling) but I doubt you can hear it once inside one of the neighbors houses.

Lmao. I bet it's heard quite further than you would think especially at night when all is quiet.

jsgrise 02-15-2017 06:44 AM

Quote:

Originally Posted by lukeamdman (Post 50765457)
Initial SPL testing with one cab indicates that with all 8 I'll be approaching 148-150db from 15-20hz!

Crazy bastard! :devil:

Fabricator 02-15-2017 06:48 AM

gotta see this ............

Rowan611 02-15-2017 07:04 AM

Quote:

Originally Posted by stsand (Post 50767217)
Same size as mine. I've got two 21s, and it thumps pretty good in there. 8 is just mind blowing...

Sent from my XT1575 using Tapatalk

10 if you count Luke's two iPals in the Othorns. :D

It was crazy in there with the 21s sealed, in these monsters....well I'm really looking forward to demo clips. Especially some of the lower stuff.

bpgunning 02-15-2017 07:25 AM

Quote:

Originally Posted by Fabricator (Post 50773153)
gotta see this ............

"OK guys I'll turn it up for a demo, hang on..."
https://s-media-cache-ak0.pinimg.com...1f07a5d106.gif

cubdenno 02-15-2017 07:51 AM

Your builds make me happy.

lukeamdman 02-15-2017 08:05 AM

Quote:

Originally Posted by audiovideoholic (Post 50772929)
Lmao. I bet it's heard quite further than you would think especially at night when all is quiet.

In the past I have asked my neighbors if they heard anything, and they hadn't, but after this build I may have to inquire again :D

I have awesome neighbors, so even if they did occasionally hear something I doubt they'd care.

Scott Simonian 02-15-2017 12:27 PM

Is this still a thing?

I would have thought you would have moved on to passive radiators by now.

lukeamdman 02-15-2017 12:44 PM

Quote:

Originally Posted by Scott Simonian (Post 50782985)
Is this still a thing?

I would have thought you would have moved on to passive radiators by now.

Been there done that :p

Besides the extra cost I really liked the dual PR sub!

Phonzo07 02-15-2017 12:56 PM

This is just plain UNFAIR.. Like Really Unfair.. WHY? WHY? ... Yes I'm Jealous.. :D

stegen 02-15-2017 01:53 PM

Quote:

Originally Posted by lukeamdman (Post 50768329)
Fortunately for me my HT is completely below ground level. You can hear it outside (mostly noises from my house rattling) but I doubt you can hear it once inside one of the neighbors houses.

I vibrate my neighbors house so don't assume. [emoji4]

Sent from my VS986 using Tapatalk

adaman7 02-15-2017 01:54 PM

Subed... all pun intended.

Sent from my SAMSUNG-SM-G891A using Tapatalk

adaman7 02-15-2017 01:55 PM

Please delete duplicate

Fabricator 02-15-2017 01:55 PM

Quote:

Originally Posted by bpgunning (Post 50774057)
"OK guys I'll turn it up for a demo, hang on..."
https://s-media-cache-ak0.pinimg.com...1f07a5d106.gif

:eek: LMAO

Quote:

Originally Posted by lukeamdman (Post 50775033)
In the past I have asked my neighbors if they heard anything, and they hadn't, but after this build I may have to inquire again :D

I have awesome neighbors, so even if they did occasionally hear something I doubt they'd care.

your going to have to worry about stuff falling off of their walls and shelves. been there, done that. "that" they will not like.

i used to live in an all concrete condo, ceiling, walls, floor. it had room gain like you would not believe. i would crank it up LOUD = anyone on this forum would be proud. only towards the end of me living there did i get any "feedback", lol. that was 1 reason i moved.

ZLTFUL 02-15-2017 01:56 PM

"Hi. My name is Luke and I have found the brown note."

:D

steve71 02-15-2017 02:08 PM

Time to check your home insurance policy!


All times are GMT -7. The time now is 11:04 PM.

Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
vBulletin Security provided by vBSecurity (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.