The Hideaway Theater - Page 86 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 3301Likes
Reply
 
Thread Tools
post #2551 of 3706 Old 05-29-2019, 12:46 PM
Senior Member
 
Join Date: Apr 2017
Location: Salt Lake City, Ut.
Posts: 279
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 229 Post(s)
Liked: 179
Quote:
Originally Posted by eeyoreDK View Post
That is most likely a clipping limiter, it will not prevent the drivers from bottoming out. The limiter in e.g. Behringer NX-D series let you set the maximum voltage output.
This is nice to have and not need to have features, but e.g. NX1000D is very cheap and should be able to drive a 4 driver BOSS without breaking a sweat.
I take it you have an Inuke then? Have you done the fan mod, or is fan noise not really as big a deal as I'm thinking?

Sony 75X940E, Denon X6200w, Sony X700, Roku Ultra, MiniDSP 2x4HD
Parasound (2x)HCA-855a, HCA-750a, Sony ES4300, BKA-1000 & -300
Mission 705a L&R, dual 70c3 C, 703 SL&SR, 705 BL&BR, (4x)Yamaha NSIC800 Atmos
LFE- Front: M&K MX-200 & MX-150THX; Rear: (2x)M&K V-75's
ULF- Bk LFE(4x) & Advance + Aura shakers(2x) + Mini-riser BOSS(8x12" JBL's)
Kevnmin is offline  
Sponsored Links
Advertisement
 
post #2552 of 3706 Old 05-29-2019, 12:52 PM
Member
 
Join Date: Apr 2018
Posts: 45
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked: 35
Quote:
Originally Posted by Kevnmin View Post
I take it you have an Inuke then? Have you done the fan mod, or is fan noise not really as big a deal as I'm thinking?
Yes I have 4 NX3000D but they are in a separate room, so I have not modded them, but I would if they were in the same room. Should be pretty easy, but quality fans will add to the total cost.
eeyoreDK is offline  
post #2553 of 3706 Old 05-29-2019, 01:10 PM
Member
 
cobr's Avatar
 
Join Date: Apr 2014
Posts: 57
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 30 Post(s)
Liked: 17
Quote:
Originally Posted by Kevnmin View Post
The Crown has an option for limiter, the operation manual I'm looking at on-line doesn't explain thoroughly. Maybe a phone call to technical support is in order.
I am using an XLS 1500. Its LPF can only do 50Hz. You will need a mini dsp. Better go with the Behringer.

Sent from my SM-N960U using Tapatalk
Kevnmin likes this.
cobr is offline  
Sponsored Links
Advertisement
 
post #2554 of 3706 Old 05-29-2019, 01:25 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by tvuong View Post
Completed my BOSS build last night finally . Here are some pictures. Didn’t get to play with it much other than making sure it is working as it was late at night. At -22MV with bass +8, 3000D at 1pm 35hz LPF and 35hz +5 LS, my chair shook more than ever . More impression to follow.
Tony.....that is one sweet platform! Nicely executed for a curved row of seating. Hats off man!

Can't wait to hear your further impressions once you get it dialed in!

Wow, I'm still in awe!......2 JBL's per seat and 8 total on the same platform.....that's some serious shaker potential!

Looking forward to hearing more about your BOSS experiences!
Archaea and brazensol like this.
trhought is offline  
post #2555 of 3706 Old 05-29-2019, 01:41 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
^^ Thanks Tim. Thanks to you I am able to enjoy the natural TR for a very affordable price.
Archaea likes this.
tvuong is offline  
post #2556 of 3706 Old 05-29-2019, 01:58 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by tvuong View Post
^^ Thanks Tim. Thanks to you I am able to enjoy the natural TR for a very affordable price.
You're so welcome Tony! You've taken the BOSS idea and guidelines and blended them perfectly into your design. Truly impressive and an inspiration for others who have similar setups for sure!

I'm seeing a lot more curved rows in AVS theaters these days. Your platform design is perfect to help those members visualize how to implement a BOSS platform into those curved rows with a low form factor. Truly impressive!

I'm going to link your post and pictures in post 29 for the benefit of others with curved rows!

Thank You!
trhought is offline  
post #2557 of 3706 Old 05-29-2019, 02:07 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by Sekosche View Post
VNF riser over BOSS turned out great. There’s a lot more chest slam and midbass TR with them at the appropriate body level..
Looks great Sekosche. Thanks for posting the picture of your new VNF shelf. Pictures for VNF's help so much. With all the angles and heights involved with dialing in a VNF experience, it can get rather involved. Pictures are worth a thousand words. Looks great and I can only imagine the closer proximity is helping to enhance the overall experience! I like Tony's idea of flipping the Marty's and getting the drives even closer to chest height plus the windage from the port if you're into that kind of effect. WAF probably won't be as high as it is now, but would be pretty easy to flip them up for those bachelor afternoons or weekends! Nicely done and simple enough to allow flexibility for VNF placement.....kudos!

Edit: I just re-read Tony's suggestion and realized he was suggesting turning the VNF's 180 degrees so the ports are in the middle rather than outer edges. That would still keep the WAF rather high like it is today. My suggestion was to turn them 90 degrees to get the windage blowing at your head and the woofers up even closer to chest height....if I'm interpreting the pictures correctly.

Last edited by trhought; 05-29-2019 at 02:24 PM.
trhought is offline  
post #2558 of 3706 Old 05-29-2019, 02:23 PM
Senior Member
 
Join Date: Aug 2008
Location: SC
Posts: 484
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 333 Post(s)
Liked: 987
Quote:
Originally Posted by tvuong View Post
Completed my BOSS build last night finally . Here are some pictures.
What chairs are those?

Electronics: Denon X4400, Vizio M65
Sub: PSA TV36-iPal
Speakers: 3 x Chane A2.4 LCR, Klipsch Quintet Surrounds
chucks0 is offline  
post #2559 of 3706 Old 05-29-2019, 02:30 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
^^ A friend of mine asked the same question. Unfortunately, I don't have a clue as it has been a while. All I know is it is about 20 years old and made in USA. Sorry, I don't have further info.
tvuong is offline  
post #2560 of 3706 Old 05-29-2019, 02:43 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
Quote:
Originally Posted by trhought View Post
Pictures are worth a thousand words.
Like this?


^^Left: Subs only, Right: Boss only. Both at reference level bass. Behringer 3000D amp at 1PM volume position with 35Hz LPF and 35Hz +5 LS.
Sekosche likes this.

Last edited by tvuong; 05-29-2019 at 02:55 PM.
tvuong is offline  
post #2561 of 3706 Old 05-29-2019, 02:48 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
Quote:
Originally Posted by trhought View Post
Truly impressive!

I'm going to link your post and pictures in post 29 for the benefit of others with curved rows!

Thank You!
I am honored . I could stain or paint it but figure it is going inside my dedicated dark theater room, so I left it bare.
trhought likes this.
tvuong is offline  
post #2562 of 3706 Old 05-29-2019, 03:45 PM
AVS Forum Special Member
 
Nalleh's Avatar
 
Join Date: Aug 2014
Location: Norway
Posts: 3,742
Mentioned: 314 Post(s)
Tagged: 0 Thread(s)
Quoted: 2577 Post(s)
Liked: 3471
Quote:
Originally Posted by tvuong View Post
^^ Thanks Tim. Thanks to you I am able to enjoy the natural TR for a very affordable price.
Wow, good job man! That sure looks very nice. Let us know how it works

Dual Atmos Receivers - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE - 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XBox OneX - Apple TV4K - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
Nalleh’s HT
Nalleh is offline  
post #2563 of 3706 Old 05-29-2019, 04:19 PM
Member
 
Falonious's Avatar
 
Join Date: Jul 2018
Location: West MI
Posts: 179
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 99 Post(s)
Liked: 87
Quote:
Originally Posted by Kevnmin View Post
I take it you have an Inuke then? Have you done the fan mod, or is fan noise not really as big a deal as I'm thinking?

Not only did I do the fan mod (yes they are noisy stock) but I followed my old computer building ways and did this also....my 3000 inuke looks just like this now. It never even gets warm. And the DSP works well on these also.

Kevnmin and eeyoreDK like this.

All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.
T. E. Lawrence
.
Falonious is offline  
post #2564 of 3706 Old 05-29-2019, 04:53 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by tvuong View Post
Like this?


^^Left: Subs only, Right: Boss only. Both at reference level bass. Behringer 3000D amp at 1PM volume position with 35Hz LPF and 35Hz +5 LS.
Attached Thumbnails
Click image for larger version

Name:	astonished.jpg
Views:	117
Size:	39.5 KB
ID:	2573246  
trhought is offline  
post #2565 of 3706 Old 05-29-2019, 04:59 PM
AVS Forum Special Member
 
Nalleh's Avatar
 
Join Date: Aug 2014
Location: Norway
Posts: 3,742
Mentioned: 314 Post(s)
Tagged: 0 Thread(s)
Quoted: 2577 Post(s)
Liked: 3471
Quote:
Originally Posted by tvuong View Post
Like this?


^^Left: Subs only, Right: Boss only. Both at reference level bass. Behringer 3000D amp at 1PM volume position with 35Hz LPF and 35Hz +5 LS.
Hmm, pic doesn’t show up for me ?
SBuger likes this.

Dual Atmos Receivers - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE - 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XBox OneX - Apple TV4K - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
Nalleh’s HT
Nalleh is offline  
post #2566 of 3706 Old 05-29-2019, 05:44 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by Falonious View Post
Not only did I do the fan mod (yes they are noisy stock) but I followed my old computer building ways and did this also....my 3000 inuke looks just like this now. It never even gets warm. And the DSP works well on these also.

Great idea!....looks like heat sink tape between the heat sinks. That stuff is awesome. I've used it on laptop cpu's and gpu's in the past with great results. I still remember when my son was younger and some of it was laying on the table. He touched it and said I should put it back in the refrigerator.
Kevnmin likes this.
trhought is offline  
post #2567 of 3706 Old 05-29-2019, 07:54 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
Quote:
Originally Posted by Nalleh View Post
Hmm, pic doesn’t show up for me ?
Really? I see it right in your post where you quoted me.
tvuong is offline  
post #2568 of 3706 Old 05-29-2019, 07:55 PM
Member
 
Join Date: Apr 2018
Posts: 198
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 123 Post(s)
Liked: 133
Quote:
Originally Posted by tvuong View Post
Really? I see it right in your post where you quoted me.


Me too. I’m using Tapatalk though... I’ll try desktop.
Polyrythm1k is offline  
post #2569 of 3706 Old 05-29-2019, 08:05 PM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
^^ Strange. I just try Tapatalk and see it there as well. Let me post again via Tapatalk. See it?


Left: subs only at reference bass, Right: Boss only at reference bass with 3000D amp at 1pm gain, 35hz LPF and 35hz +5 LS. 5lbs rice bag on my iphoneX.
tvuong is offline  
post #2570 of 3706 Old 05-29-2019, 08:08 PM
AVS Forum Special Member
 
Nalleh's Avatar
 
Join Date: Aug 2014
Location: Norway
Posts: 3,742
Mentioned: 314 Post(s)
Tagged: 0 Thread(s)
Quoted: 2577 Post(s)
Liked: 3471
^^ it works now. Nice

Dual Atmos Receivers - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE - 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XBox OneX - Apple TV4K - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
Nalleh’s HT
Nalleh is offline  
post #2571 of 3706 Old 05-29-2019, 08:11 PM
Member
 
Join Date: Apr 2018
Posts: 198
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 123 Post(s)
Liked: 133
Quote:
Originally Posted by tvuong View Post
^^ Strange. I just try Tapatalk and see it there as well. Let me post again via Tapatalk. See it?


Left: subs only at reference bass, Right: Boss only at reference bass with 3000D amp at 1pm gain, 35hz LPF and 35hz +5 LS. 5lbs rice bag on my iphoneX.


That’s a thing of beauty!
Polyrythm1k is offline  
post #2572 of 3706 Old 05-29-2019, 08:31 PM
AVS Forum Special Member
 
imureh's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,574
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 2865 Post(s)
Liked: 3594
Quote:
Originally Posted by tvuong View Post
^^ Strange. I just try Tapatalk and see it there as well. Let me post again via Tapatalk. See it?


Left: subs only at reference bass, Right: Boss only at reference bass with 3000D amp at 1pm gain, 35hz LPF and 35hz +5 LS. 5lbs rice bag on my iphoneX.


How about combined now?


Sent from my iPhone using Tapatalk

Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser, 2 BK LFE
Speakers: PSA MTM-210 L/C/R - Klipsch 250S Surrounds, PSA MT 110sr Rear Surrounds, 4 x SVS Prime Elevation for Atmos
Video: Epson PowerLite Home Cinema 6500 UB; Room: 2100 cuft sealed on suspended floor
Receiver & Players: Denon X4400H, Oppo UDP-203, Roku Ultra. Apple TV, Minidsp 2X4 HD
imureh is offline  
post #2573 of 3706 Old 05-29-2019, 08:34 PM
AVS Forum Special Member
 
Nalleh's Avatar
 
Join Date: Aug 2014
Location: Norway
Posts: 3,742
Mentioned: 314 Post(s)
Tagged: 0 Thread(s)
Quoted: 2577 Post(s)
Liked: 3471
^^^ That TR increase should be a big difference from subs only ?
SBuger likes this.

Dual Atmos Receivers - Atmos 13.1.8/DTS X 9.1.8/Auro 3D 13.1 - Denon AVCX8500H+AVRX7200WA - Klipsch+KEF - 6xSI18" - 12xJBL 12" w/6xSLAPS M12 downfiring VNF - 3x2 stacked Crowson MA - 4xBK-LFE - 6xNU6K(fan&trig mod) - Minidsp 10x10HD - Oppo UDP203 - XBox OneX - Apple TV4K - JVC RS600 Dreamscreen V2 120"- Philips 65OLED873.
Nalleh’s HT
Nalleh is offline  
post #2574 of 3706 Old 05-29-2019, 11:40 PM
AVS Forum Special Member
 
Sekosche's Avatar
 
Join Date: Nov 2015
Posts: 2,364
Mentioned: 136 Post(s)
Tagged: 1 Thread(s)
Quoted: 1439 Post(s)
Liked: 3634
The Hideaway Theater

Quote:
Originally Posted by tvuong View Post

Sweet! And that mimics the waveform perfectly; you’re getting some very accurate TR with those seats and the BOSS it looks like.

Has it launched you into space yet? What do you think of it?

This makes me want to try it without the second riser and MA’s setup to see what it feels like and to see if the TR is more consistent across the board with a little more firm seating above the BOSS.
SBuger likes this.

Speakers: PSA MTM-210T x2, MTM-210C, MT-110SR x2; Atmos-SVS Satellite x2, DIY Volt-10 x2
Subs: PSA V1801 x2, DIY: 18" RSS460HO, 15" RSS390HO x2, BOSS w/JBL CX1200 x6
MA’s: Crowson Tech x2
Processing: Denon X4200, NU6KDSP, 3KDSP
Video: Epson 3700; Screen: Silver Ticket 106" High Contrast

Last edited by Sekosche; 05-30-2019 at 01:22 AM.
Sekosche is offline  
post #2575 of 3706 Old 05-30-2019, 06:09 AM
AVS Forum Special Member
 
Rowan611's Avatar
 
Join Date: Apr 2011
Location: Pella, IA
Posts: 1,522
Mentioned: 87 Post(s)
Tagged: 0 Thread(s)
Quoted: 615 Post(s)
Liked: 712
Quote:
Originally Posted by tvuong View Post
^^ Strange. I just try Tapatalk and see it there as well. Let me post again via Tapatalk. See it?


Left: subs only at reference bass, Right: Boss only at reference bass with 3000D amp at 1pm gain, 35hz LPF and 35hz +5 LS. 5lbs rice bag on my iphoneX.


Nice!! I’ve been meaning to do the same test. I’m curious to see how the riser interacts with the bass from my subs vs BOSS vs Crowsons vs all three together.

Then, I’ll do the same when I get the risers connected.



Sent from my iPhone using Tapatalk
Sekosche likes this.

HT: Oppo UHD-203 | Crown Amps | NX3000D | NX6000D | 1299s | Volt 8s | THTs | Crowson Shadow 8s | BOSS riser | Panamax 5300PM | LG OLED 65B6P
Family: Denon AVR-S740 | PSB Alpha AVs | Sony X900F | X1
Rowan611 is offline  
post #2576 of 3706 Old 05-30-2019, 08:06 AM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
Quote:
Originally Posted by imureh View Post
How about combined now?
I didn't try cuz I was actually scared

Quote:
Originally Posted by Nalleh View Post
^^ it works now. Nice
Quote:
Originally Posted by Polyrythm1k View Post
That’s a thing of beauty!
Quote:
Originally Posted by Sekosche View Post
Sweet! And that mimics the waveform perfectly; you’re getting some very accurate TR with those seats and the BOSS it looks like.

Has it launched you into space yet? What do you think of it?

This makes me want to try it without the second riser and MA’s setup to see what it feels like and to see if the TR is more consistent across the board with a little more firm seating above the BOSS.
Thanks guys. I still have not played with my system yet to form more opinion but from the EoT intro clip I measured, it was freaking INSANE and it felt awesome. My 4 seats recliner shook violently at the last note (graph does tell) .

Look at your 6 Boss+ MA's measurement @Sekosche , it also mimics the waveform well but do try and show us Boss only without the MA's second riser. I don't remember reading your impression comparing Boss to MA's performance?
Quote:
Originally Posted by Sekosche View Post
The 10Hz TR is amazing with BOSS 2.0!
SBuger likes this.
tvuong is offline  
post #2577 of 3706 Old 05-30-2019, 08:27 AM
AVS Forum Special Member
 
tvuong's Avatar
 
Join Date: Dec 2000
Posts: 5,330
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 2621 Post(s)
Liked: 2380
Question on the 3000D amp impedance setting: Does it automatically set the impedance every time the unit is turned on or is it something I need to select? I have saved a config with 8 ohms selected but when I power cycle the amp, all is saved but the impedance. Also, when low-passing, which filter is recommended: Butterworth, Bessel, or Linkwitz-Riley? Thanks

tvuong is offline  
post #2578 of 3706 Old 05-30-2019, 08:53 AM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by Sekosche View Post
Sweet! And that mimics the waveform perfectly; you’re getting some very accurate TR with those seats and the BOSS it looks like.

Has it launched you into space yet? What do you think of it?

This makes me want to try it without the second riser and MA’s setup to see what it feels like and to see if the TR is more consistent across the board with a little more firm seating above the BOSS.
Quote:
Originally Posted by Rowan611 View Post
Nice!! I’ve been meaning to do the same test. I’m curious to see how the riser interacts with the bass from my subs vs BOSS vs Crowsons vs all three together.

Then, I’ll do the same when I get the risers connected.
It really depends on your goals, your room and personal TR preference. Having the BOSS platform as prescribed in Post 29 and executed to that formula like @tvuong did will result in an accurate reproduction of the ULF in the original source signal, no matter the source material....music, movies, sine waves square waves, etc.

This accuracy and natural reproduction of ULF is due to the BOSS system behaving in a predictable and linear fashion because of:

1) A very stiff platform that minimizes any bending. When bending occurs, the BOSS will lose linearity and won't be accurate to the source material it's trying to reproduce

2) A homogeneous and soft (20-30 durometer) suspension. Having the same soft isolators underneath the platform is paramount to minimize bending of the platform. The soft suspension allows the platform to behave on command from the drivers directly attached to it. Mixing isolators or having multiple layers of platforms, each with it's own suspension system will also result in non-linearities which take away from accurate representation of the ULF. In the case of having 2 platforms on top of each other, they won't be moving in unison because the second platform isn't directly responding to the drivers below. It has to wait for the drivers force to transfer to it and introduces a time delay to the second platform. In the case of having different isolators underneath 1 platform, this results in different parts of the platform not moving in unison because of the different stiffness isolators underneath. This causes platform bending which counteracts number 1 above.

3) Driver linearities.....I was originally concerned about non-linearities in the drivers themselves. Every driver suspension behaves differently when comparing its stiffness when the cone is moving out vs. its stiffness when the cone is moving in. However, during my tests when comparing the platform responses at several different points at the same time, there wasn't any platform bending occurring that could be attributed to these driver non-linearities. I tried several alignments and there wasn't any net affect on platform bending when trying drivers face up, face down, even opposing which would minimize non-linearities to the fullest. So, as long as the drivers are suitable for open baffle and have good shaker potential, they will work great on a BOSS platform.

4) Passive forcing of the BOSS platform. If you follow number 1 and number 2 above, then the BOSS platform will also respond naturally and linearly to the passive pressure waves washing over it from your far field subs. This enhances the ULF content from the source material as long as those far fields have been properly time aligned using calibration techniques discussed on AVS. If those far field subs aren't time aligned properly with the MLP, then they could destructively interfere with the direct forcing function of the drivers directly mounted to the BOSS platform. Surprisingly, I've found no additional delay is needed for the BOSS and using the same delay as the far fields works great. I think this has to do with the timing of the BOSS system response having a natural delay due to the suspension having to be compressed and uncompressed before it can delivery that theoretical sine wave but I didn't conduct any timing tests to confirm this since the results were surprisingly good out of the gate using no additional delay.

5) Surface area of the BOSS platform. The larger the area of the BOSS platform, the more it will respond passively to your far field subs due to the pressure wave washing over it and your TR will be naturally enhanced with larger surface areas.

All the above is what makes a BOSS system behave linearly and naturally. @tvuong has maximized each of these attributes with his design. This may not be for everyone as some may like more TR in certain frequencies or need more or less TR in certain frequencies depending on your room and suspended floor vs. concrete floor.

That's were other TR devices may come in handy, but be aware those other TR devices will change the behavior of your BOSS platform and cause it to behave non-linearly. For example, adding Crowson's on top of a BOSS platform will cause very high localized forces to be applied to the platform right underneath the actuators. This highly localized force will cause your BOSS platform to bend more in that area which causes non-linearities. Placing isolators direclty below the actuators will cause that isolator to become stiffer than it's neighbors because of the localized deflection. Same with BK's and any other TR devices that are attached to the platform.....VNF's, passive radiators, etc. All of these BOSS additions can destructively interfere with each other in addition to causing the BOSS platform to bend un-naturally. So the more TR devices and platforms that are attached to the BOSS foundation, the more trial and error will be needed to find a delay for each that will have all working in unison together. That delay can be electrical delay or mechanical delay through movement of the forces around on the platform and finding the bending moments that work together.

Wow, that's way too much techno-babble for the average BOSS fan, but for those who like to tinker, some of this feedback may help with your own personal BOSS setup and enhancements to you BOSS experience.

While we're talking about BOSS enhancements, for whatever it's worth.....I did a lot of experiments with VNF for about 2 months before the BOSS experiments began. This was my first foray into ULF TR and I was fascinated by how easy it was to induce TR on my body. I found over those 2 months of experimenting that I could never get a consistent VNF experience. As soon as I got it dialed in for optimum feeling for the movie or music I was listening to, the experience would change dramatically when I switched source material. Even with the same source material, the VNF experience would change dramatically just with a change in MV. The only VNF alignment I found that felt somewhat natural and most importantly consistent was with the VNF right in front of me.....literally 8-12" from my chest. This wasn't very practical because I couldn't see the screen but delivered a VNF experience that was pretty cool. Just wanted to mention that for you TR junkies out there who like to experiment. Basically, I placed my VNF on a dinner tray right in front of me. If you haven't tried that yet, you'll be surprised how much of an improvement this makes in the VNF experience....very impractical though.

Anyone want to try a BOSS vest experiment.....how cool would that be for you TR junkies out there who don't have WAF to consider and don't mind strapping up before the movie begins I can see it now, "Don't mind me honey, I'm just getting ready for my next movie" as the BOSS vest and 3D glasses are being put on before entering the theater

Last edited by trhought; 05-30-2019 at 09:09 AM.
trhought is offline  
post #2579 of 3706 Old 05-30-2019, 01:02 PM
Advanced Member
 
usc1995's Avatar
 
Join Date: Jan 2007
Location: Sunny Southern California
Posts: 767
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 398 Post(s)
Liked: 258
Hi Guys,

Pleased to say I got my BOSS platform up and running last night and it is an awesome upgrade. I finally can feel what I’ve been missing with a theater built on a concrete slab. I am really looking forward to getting this thing dialed in. I built mine with four drivers and only one sheet of plywood. I thought everything was fine until I tried to recline one of the recliners and heard it scrape against the top of the driver. I had to add some spacers to clear it but all is well now. This was my second time wiring drivers and first time using a jigsaw to cut holes. It looks great...in the dark and feels even better! Thanks for the great idea!

One question, with the compression of the isolators and my thick carpet my platform sinks to the point that the flange of the drivers is up against the carpet. I can wedge a 5 mm thick yardstick under it with a push so they aren’t completely squished on the floor. Will this be a problem going forward? I don’t hear any noises from the drivers when they are moving but I thought I’d ask. I suspect as the isolators compress more over time it might be a problem. I’d rather not add more spacers under the isolators if I can help it as I don’t care to raise the couch further. What do you think?Click image for larger version

Name:	IMG_1089.jpg
Views:	41
Size:	452.0 KB
ID:	2573666Click image for larger version

Name:	IMG_1087.jpg
Views:	44
Size:	663.5 KB
ID:	2573672


Sent from my iPad using Tapatalk
SBuger and trhought like this.

Last edited by usc1995; 05-30-2019 at 01:05 PM.
usc1995 is offline  
post #2580 of 3706 Old 05-30-2019, 02:19 PM - Thread Starter
AVS Forum Special Member
 
trhought's Avatar
 
Join Date: Jan 2006
Location: Louisiana
Posts: 1,545
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 736 Post(s)
Liked: 1246
Quote:
Originally Posted by usc1995 View Post
Hi Guys,

Pleased to say I got my BOSS platform up and running last night and it is an awesome upgrade. I finally can feel what I’ve been missing with a theater built on a concrete slab. I am really looking forward to getting this thing dialed in. I built mine with four drivers and only one sheet of plywood. I thought everything was fine until I tried to recline one of the recliners and heard it scrape against the top of the driver. I had to add some spacers to clear it but all is well now. This was my second time wiring drivers and first time using a jigsaw to cut holes. It looks great...in the dark and feels even better! Thanks for the great idea!

One question, with the compression of the isolators and my thick carpet my platform sinks to the point that the flange of the drivers is up against the carpet. I can wedge a 5 mm thick yardstick under it with a push so they aren’t completely squished on the floor. Will this be a problem going forward? I don’t hear any noises from the drivers when they are moving but I thought I’d ask. I suspect as the isolators compress more over time it might be a problem. I’d rather not add more spacers under the isolators if I can help it as I don’t care to raise the couch further. What do you think?
Looks great USC! Thanks for sharing your pictures and welcome to the BOSS family! That's the classic BOSS platform and what I'm using also....except I only have 3 JBL's So glad to hear the BOSS has enabled ULF in your concrete slab theater!

Funny you mention the scraping sound....I get a similar kind of scraping noise when I pull out our sleeper sofa. After further inspection it was just the fabric mesh of the sleeper bed scrubbing against the top of the magnet when pulling it out so no biggie for the 2 or 3 times per year that it gets used. Trying to shoehorn the drivers underneath furniture is one of the biggest challenges with a mini-riser BOSS platform but the troubles are so worth it considering the results and small cash expense!

Regarding the clearance between the speaker flanges and your carpet, you'll probably need wood spacers or furniture sliders to increase the clearance. This is especially true as your carpet and carpet padding sag over time like most furniture does on thick carpet and padding. Some members have used scrap pieces of the 3/4 inch plywood from their BOSS build and others have used the traditional furniture sliders, while others have used any other scrap pieces of wood they had laying around.

The key is to maintain about 1/2 inch of clearance between the flange and the carpet as close as possible....it's not extremely critical what the clearance is as long as it doesn't get too close and start restricting movement of the cone over time.

Enjoy your new found ULF and please let us know of your first impressions after getting it dialed in and watching a movie or two!
trhought is offline  
Sponsored Links
Advertisement
 
Reply Dedicated Theater Design & Construction

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off