Can We Blow these NEO 8 inch Subs with a 4000 watt Amp?

[@rickyt310]

I'd love to see more of these subs. Preferably in the back of my civic 😁

[@kswis]

The only isobaric enclosure I built didn't turn out to well. I learned that if subs aren't PERFECTLY in phase, it sounds shit and its the furthest thing from loud. After almost 7 yrs later I'm watching this wanting to try again. Thanks for sharing Derek. It was a cool project!

[@wal2]

These were crazy impressive, just the electrical in the truck couldn't keep up. The amp kept shutting off.

[@henriquee67]

tip, here in brazil when i did see ppl do that, they used dsp to adjust the phase, much easier than without it doing only with amps, if we have pretty cheap dsp that does that pretty wel, for sure u nothern american have some that does it

[@andyp3834]

It's always fun building sound systems, thanks for the comment, made me laugh, and I needed that today.

[@JamesOKeefe-US]

I did the same thing way back in the day and it was just awful 😂😂😂

[@StockA4]

If only I knew what I was talking about! I think we slapped this box together in like a couple hours. This was Itchy’s gear, and one of the problems we had wiring them up was the terminals were (mislabeled)? One pair was pushing into each other instead of push/pull. Also, Itchy decided we could “send it” once the cap blew off. That’s the high pitched rattle you hear. There were also sparks at one point. However, my 145 amp alternator was not enough to even get these 8’s going, much less blow them. It’s just an old farm truck with some basic tunes in it.

[@wal2]

Still fun times 👌

[@MichaelJohnson-je2vo]

Basic nah that's a little more than basic my friend

[@Thomamps]

I built a bandpass with 15s iso back in the 90s. The subs back then had very little Xmax to move air but you could get them to drive huge ports.

[@wetdookie3808]

Those coils moving in the open looks so pretty

[@wal2]

Yeah boi!

[@ehrenkrause9861]

Man it's been like 30 years since I've seen that kind of a setup pretty dang cool it's actually pretty efficient for the subs to do that push pull to get the sound that you want without burning up your subwoofers it's like having more horsepower for the same task 😁👍

[@kaedeschulz5422]

It only makes it more space efficient. It basically cuts VAS in half yet it still has the same cone area moving air so per watt it's less efficient.

[@mdocod]

It's actually much less efficient and introduces all sorts of problems. There are better ways to get to the same destination.

[@kaedeschulz5422]

@@mdocod absolutely!

[@ericbachmann8037]

Should have ran the 4 channel amp in bridged 2 channel mode and wired the subs outside the box out of phase. This wiring creates the Push | Pull isobaric requires. I ran 4 - 10” Soundstreams in an Isobaric box back the 90’s. 1993 Extended Cab Toyota Pick-up. Sounded decent.

[@wal2]

It was wired this way 🤷‍♂️

[@ericbachmann8037]

@@wal2 Ok, it just looked like they were struggling how to wire them up 👍

[@EvanField6380]

Having the neodymium magnets with the exposed voice coil keeps them nice and cool great subwoofers

[@v12alpine]

Only way to ensure proper phase is to use one channel per iso pair but with a 4-channel not possible with two pairs unless you bridged. To make things worse you can see random channels dropping out at times in this case.

[@wal2]

Amp was bridged at 2 ohms. Truck’s electrical wasn’t up to the task and amp kept going into protect

[@Adam-nv9zo]

This was cool man. I remember doing this in the mid 90's. We'd try anything to make more bass back then 😆

[@RonnieMacJr69]

Those baskets definitely look like sundown x8 baskets but without the venting holes

[@ParkerTheBasshead]

Dang those little guys are pretty cool!!

[@scottiffanimccord1509]

Hay bro good to see you! Iso looks fun.

[@theinsaneunknown]

Wish they had a video of them mounted normally in a ported enclosure or a 4th order.

[@K-Effect]

Cool video. Last time I ran isobaric was back in 96 with Realistic dvc 12s, custom home subwoofer box, ran off of a 100 x 4 Sony home amplifier. It was extremely efficient, play low and would shake the pipes in the walls

[@wal2]

👌😬👍

[@johnalenwork53]

Awesome video Big D! Nice Enclosure!!! Love the Amp and Woofers!! Love that design!

[@JoseLopez-oj2ni]

I am over HEEEEEEEEEEERE!!!!! IN SAN FRANCISCO CALIFORNIA. I appreciate every videos of yours señor. THANK YOU

[@wal2]

Enjoy that west coast lyfe!

[@Aaron48219]

Theres no way only 132 cracked the windshield. Side note, it takes mid-140s to break the seal on the hatch window of a 1995 Escort GT.

[@MrDopey32]

Always great to hangout with friends and have a great time! Thanks Big D!!

[@wal2]

Yessir!!

[@mikemccabe7124]

I used to build alot of different isoberic boxes back in the day from similar to what you guys did to blow thru's on trucks & I even was able to pull off behind the seat truck style box for 2-10" subs that fit behind even the 90's & up ford rangers and Ranger splash edition trucks that I had to build quite a few of back then I guess I was good at them but haven't made one in like 10 years but now I'm thinkin i might do one for my 4-12" since I ripped everything recently cuz was tired of my old setup so thanks for the idea

[@wal2]

👌😬👍

[@waltkosch]

Video or it never happened 🤣

[@1ohmwrecker]

Watching them coils flow thru the motor is super cool tho!

[@electronicengineer]

I couldn't believe how much excursion those subs had! It looked like it was near two inches of bidirectional travel... Insane.

[@1ohmwrecker]

@@electronicengineer they move about as much as my Sundown Xv3's lol

[@johndilauro3462]

I have done Isobaric,Compound Isobaric enclosures .Dual wave compression boxes Isobaric enclosures can be neat .But Tricky If you do it right .They can hit !! With a lot less air space You can wire them so it’s a push pull . Or parallel.

[@floydwilliams3321]

Those are some nice subs

[@justinhiggins2210]

Back in the day, early 90s I mounted subs isobaric to cut down on box size requirements. Not really so much for spl. Blues, affiliated with Linear Power I think I can recall made a cool system where two subs were installed in a clear tube fairly close to each other and it worked pretty good, I have a few of them left I think. Great video, so enjoyable, thank you.

[@notchbak]

I always thought isobaric was generally done to reduce the needed air volume needed by half... (Ie: 12 inch needs 2 cube, but isobarically mounted the volume only needed to be 1 cube for the pair?)

[@less5406]

It is. Isobaric mounting cuts the Vas in half. It also cuts the efficiency by 3 or 6 db...I don't remember which.

[@proffessasvids]

Yes this cab is far far far too big tbh. I only ever use iso if I don't have the volume needed for a given driver size..... and don't mind wasting another driver to do it. We did it a fair amount back in the day, using multiples of cheap woofers. That was before I could afford proper drivers. Nowadays these super strong low qts drivers will run in cabs smaller than the cardboard ones they were shipped in. I remember running 18"s in 7-8 cube vented back in the day. Now I'm building 4.5-5 rear chambers for modern neo and large format ferrite 18"s. Xx

[@josmith213]

Yes, it's not really a factor with today's woofers as they have huge motors and power handling. In the 90s a 12" really needed like 3-4 cubes in a ported to get low, also most woofers were like 100-200w rms on average unless you dropped a boat load of cash on a 'high power' woofer that would handle like 500w rms. So with isobaric you could have a decent sized box and the power handling of 4 woofers, but it had the cone area of 2 12s.

[@91CavGT5]

Wow!! Outside of close family, I’ve never heard of Scurry Texas! That hole in the wall is just a few miles from my dad’s house! I love me some 8” subs!! Back in the day I played around with isobaric loading of subs before I knew what I was doing. I had a pair of Radio Shack 6 1/2” mid bass drivers. Unbeknownst to me, the box I built was a ported isobaric box where the second sub was behind the first sub and mounted to a panel inside the box. The chamber in between the two subs was sealed, and dual 2” ports ran from the front panel, through the sealed portion, and into the back chamber. The ports were flush with the front panel and middle panel, if that makes sense. For a cheap setup, and not knowing what I was doing, it sounded pretty good and was around 1.5 cubic foot in total air space. This was in 1992!! Oh how little did I know back then!!

[@wal2]

👌😬👍

[@scottiffanimccord1509]

Love, love, loved the video D! Thank you!

[@wal2]

Thanks for watching and commenting!

[@Abowe3404]

That is exactly what was going on in Chris lees build at slam this year I could measure the coil and it would say no more than 110 to 120°F but I measured the motors and they were burning heart at almost 200°F, just goes to show the heat soaking capabilities of neo

[@MickeyMishra]

There was this one SPL Mitsubishi eclipse build that was owned by a marine on base way back in 2005. It was from what I recall, a Bandpass horn loaded enclosure with isobaric woofer configuration. Why? All he had at the time was a stock 130 Amp Alternator. The only mod being the overdrive pulley. It took up the entire back seat and most of the hatchback. I don't think he needed lowering springs on the back. But he did have bump stops. what was CRAY-ZEE!? I think he was running with less than 600 Watts of power for the 8 subwoofers in that box. I never got a chance to hear it in person. Just when it drove by. What was amazing about it is that it was all with relatively easy to get to alpine parts. Nothing to far out there. Sad part is? I don't think he ever came back to pick up his ride from base, so it got towed away after sitting for a few years in the parking lot. So many great builds, and I bet you they are just either sitting in a junkyard someplace? Or have been lost to time or crushed overtime.

[@freshkryp69]

They do highly resemble those Hutchinson subs! I'd be happy with either of those high caliber of sub!

[@polton00]

MMMM love me some isobaric setups, those are sexy lil 8s, also good choice splitting the coils per channel to balance the power differential

[@jeryjohn]

I used to love oddball setups back in the day

[@wal2]

👌😬👍

[@sirsnappz5307]

The isobaric setup protects the subs and allows a sub to handle damn near double the power

[@iamnobody3793]

It would be awsome considering how well you can see the voice coils to have a high speed camera and film blowing one up.

[@jjthomas9656]

Oh dang man m,wish i had known you were in my area,id love to meet you and exchange knowledge.i owned audio shop in terrell, and greenville in the 90s,when folks were really into big bass,ny buddy had a shop in Kaufman,he now owns probox,we still keep in touch and visit time to time.watching this channel brings back great memories of my best years,i still do installs on the side, but nothing crazy.keep it up,and for sure lmk if you back in east tx✌️

[@vpowerelectrix998]

First time I ever saw Isobaric enclosure was with Kicker products back in 90s

[@donjaun540]

So what was the loudest you got those speakers to crack windshield?? I loved seeing that collection of really nice Zapco amps. WoW!!

[@wal2]

That was a joke, the windshield was already cracked…sorry 🤣

[@donjaun540]

@@wal2 I have a couple 6.5 and blame cracked windshield on them. 🤣😭😂

[@smiththers2]

i cant say im surprised they didnt blow. a lot of air cooling on those copper coils.

[@wal2]

😬👍

[@scottiffanimccord1509]

Yea when D said they was going to try and blow them with a 4k, I thought the same thing. It would have been interesting to see actual RMS at the woofer after rise. If I was guessing less, then half that power.

[@n.shiina8798]

if he wanted to cook the coils, it would be easier to run the amp on its clipping condition. the high order harmonics would heat up those coils much faster

[@annihilationindustries1990]

@@wal2 why did they have so much Mechanical noise ? it sounded like the coils are rubbing bad !

[@jdlech]

I always wanted to see if there would be a measurable difference in isobaric subs if you replace the air between them with helium. Less mass to push around.

[@dslifestuff9331]

I've never had much luck with isobaric 😒 Seems the old traditional sealed works best for me.

[@wal2]

👌😬👍

[@quevicular]

KISS principle always

[@jeryjohn]

Just installed my old phoenix gold octane R 15.0.1 amp and ti12 elite in my crv and its like the good old days, it would be awesome if you got one to test those subs are mental

[@wal2]

Awesome 👏

[@wal2]

*See HiFiVega's Isobaric Build using Savard Subs*: kzbin.info/www/bejne/nHvKmqdjjKqBj7c *Like these old school amp videos? Support me for more like this* www.patreon.com/OldSchoolStereo Shop for Down4Sound Amps: is.gd/D4Samps Shop for Savard Hi-Q Subwoofers: amzn.to/2Nh1qcf Check Out My 2nd Channel: www.wheeliewilliston.com SMD / D'Amore Engineering Amp Dyno: goo.gl/sJTcf7 XS Power D1400 Batteries - amzn.to/2BPFCKW XS Power PSC60 Charger - amzn.to/2CHGcfs Fluke 1000A AC/DC Clamp Meter: amzn.to/2Rw5WDA Handheld Dyno: amzn.to/2u2EgKV My Favorite Screwdriver Kit: amzn.to/2x0VzcE _DISCLAIMER: This video and description contains affiliate links, which means that if you purchase from one of the product links, I may receive a small commission. As an Amazon Associate I earn from qualifying purchases_

[@HifiVega]

Surprise, surprise Itchy and I were correct… Good times as always when we all get a chance to hang out. (Also I’m glad I’ve dropped quite a few lbs since this video 😬😂)

[@wal2]

Fun times as always!

[@tamatoaitchner4049]

we sure had a fun weekend ...

[@johnalenwork53]

Very musical setup!

[@andyp3834]

Reminds me of almost 40 years ago when I make a box with 2 6x9's and finally inverted one inside the box with the other one set on top, on the outside of the box, dam, wish I knew I had just invented a new subwoofer box design, I'd be rich! I mean richer! Thanks for all your videos, it's fun stuff!

[@Śiśna3633]

Stronger the magnet, its reactance to admit AC current. To increase the power you need to increase the AC voltage. To destroy it, just apply 12v DC to it. With NEO magnets the speaker becomes powerful with efficient means and needs little power to be loud.

[@robfalkner4303]

Love it Big Derrick!!! Totally 💯 understand now !!!!

[@Gr8rome407]

Beautiful subs!!

[@SilentShadow-ss5xp]

Just wanted to weigh in bu in this situation it would be best to run all the subs off the same output channel. This way the power is being evenly distributed between all the subs. In this kind of configuration the exact amount of power and stuff matters as each sub is interacting with the other in more ways than just being in the same air chamber thus you don't want any of them under performing. WHile it woudl be cool to have each sub wired up to it's own output channel I would personally just run this off a monoblock.

[@bojow8102]

Possible dumb question but do you need special subs for this face to face setup or any just wired correctly? Thank you for the content 👍👍🤟

[@scottiffanimccord1509]

No, any woofer will work. It looks fun!

[@bojow8102]

I've got 2 15s and...ideas 😈

[@carlosmaple162]

I'vewq got an isobaric setup that sounds great sealed. 2 Skar Audio EVL-18'S clamshell. I think it's about 2.3 cubes, my starter so I will get you specs and a video soon. Oh and I have 8K pushing them in an 07 Honda Odyssey.

[@Wineman3383]

Yeah isobaric is two speakers acting as one. There's several set ups, but basically it's a sub completely in a box within its own chamber and a sealed section between, then and the second speakers either facing cone to magnet or cone to cone. The purpose is to get same spl from a smaller box. Works really well just a little too complicated for most setups. Yeah I knew the basics but was checking out the different ways on wiki. Very cool setups, people been doing this for a long time. I even think kicker makes a specific iso sub.. Yeah don't you have one Big D?

[@martintaylor984]

Itchy has ALL the Phoenix Gold good stuff

[@cpufrost]

A few things... You need an IR gun with an emissivity adjustment. When scanning metal objects, the emissivity needs to be adjusted in order to read the actual temperature. That said, with the ability to see the actual windings, a true tale sign of heating up before smelling the varnish burning is the bright orange copper color darkens slightly. Also, you can touch it with a finger with no signal if you dare! The coils were big enough to thermally dissipate whatever power they were receiving with ease. You did mention the electrical system wasn't ideal as well so I suspect you were voltage limited (in the amp's output rails). 1kW sustained (per motor) should be enough to get them quite hot and smelly. Edgewound VCs do pretty well and the 4" size is pretty standard in pro audio where we've been able to run 600W continuous through one for over 24 hours (a pink noise signal!)... Neo motors have the benefit of very high BL (motor force) for given weight. Big advantage with touring designs as neo vs. ceramic is HUGE in large cabinets with four 21" drivers, for example. That Zapco amp is beautiful. Some relate them to the Krell of car audio! Definitely a SQ amp there, great for full range. Isobarik when properly implemented produces a very tight, controlled bass. For SQ not efficiency. It will handle a LOT of power especially when using drivers that don't have much xmax. But it requires a lot of tuning to get right otherwise the drivers can get out of control real fast and if they're not built sturdily bad things will happen. Nobody wants to hear the equivalent of a 6 horsepower jackhammer behind their seat! :-P

[@wal2]

👌😬👍

[@Alansdadude]

Infrared thermometers see ir light. Shiny surfaces present the ir light reflected in them instead of their temperature. Ir temp guns are not effective on shiny surfaces ( if you use a good ir camera you can see reflections and make things out in them on shiny surfaces).

[@PhiMobileSounds]

WOAH!!! Those 8’s look nasty!!!

[@joeJoe-pb3su]

Great looking subwoofers. They look like engine pistons. 😳 😎

[@wal2]

Yes!

[@waltkosch]

Now.... Let's see that Phoenix Gold 🌀 Cyclone baby!!!

[@wal2]

Oh man that would be sweet!

[@johng6673]

You should check out Hutchinson Audio. Their 8's are absolutely insane. Their van with 18’s are so crazy phones can't figure out what's up down or sideways from the magnets are so insanely strong

[@wal2]

Seen and drooled over those 😮

[@lmadden6236]

How did you all crack the windshield under 150 dB? Nice woofers though. I remember Advent made those isobaric enclosures back in the day.

[@wal2]

I believe it was a rock 😂

[@pinsandscrews6459]

I have to ask, is that Chuck Seitsinger standing next to you in the front row? That aside, appreciate the video from the past!

[@rockfordhx2768]

Quick question running some old setups is 1 12 inch mtx 9500 rated 1000rms better then having 2 Rockford 12 inch punch hx2 rated 500 rms a piece but together equal 1000rms my point in question is what’s louder and will hit harder 1 12 1000rms or 2 12s 1000rms total together

[@CajunReaper95]

I’m curious does isobaric lend well for SQ?

[@bpintogsxr1000]

Love your channel buddy! 🤙

[@wal2]

😬👍

[@squishypeanut42]

Isobaric to me seems like it would be just an expensive version of infinite baffle but I've never heard isobaric so I don't know

[@shane11333]

What's this cd called if you don't mind me asking , I love all your videos 👍👍

[@303nitzubishi4]

Cool subs but what was the reason for trying to blow them? Did I miss something in your narration?

[@wal2]

I don’t recall. I think it was just going to be for the video

[@bcdurr]

Wait you're in DFW area! Can you drop shops addresses we should support?

[@chuckholmes2075]

still love my DD Z 10's

[@wal2]

😬👍

[@aaronandreas6093]

Is the pic you showed at the beginning, is that chuck next to you?

[@wal2]

It’s Bob

[@chrisdotson7953]

I wanna go to your Playground D!!! You should ride up to Thunder in the Smokies tomorrow at the fairgrounds in Newport Tn Bro! Gonna be a good show!! Hope to see you

[@wal2]

Sounds like a good time!

[@iChubbs_81]

Cool subs 😎

[@jordanmarker1220]

I put a 15 in a ported box inverted and then placed another ported box over the other one when I was like 16 lol

[@samueljackson2478]

Where can I buy these subs

[@stevebellen1935]

Crazy 132db cracked the windshield

[@lee28.78]

I believe he was being sarcastic ,,,those subs couldn't do that ,,,not with 50 of them...lol...way way to small ,,no excursion..lol

[@stevebellen1935]

Me too

[@wal2]

Yeah it was the rock at 65mph!

[@markbenoit8358]

Man i wish i lived closer. I would've built u a nasty box to see what the subs could do. Oh well 😆. Good video bro

[@nickaugust1661]

Isobaric FTW!!

[@wal2]

Def not something you see every day

[@nickaugust1661]

@@wal2 definitely an all time favourite way to mount subs did it with a few Sony xplods and man really gives those older subs life and aggression. Plus not to mention the size of your enclosure doesn't need to be as big! Definitely a thing of the past now as woofers get better and better

[@maxpower4781]

Shiny surface like the Chrome is terrible for infrared thermometers

[@wal2]

The subs wouldn’t hold their tongue out and say AAHH, and we didn’t have the FLIR

[@housepumpinpc3983]

Nice. Don't know what the wattage ratings on those subs. If they are in the range of 1500 each you probably won't blow them. Put a black marker spot on that chrome to get a more accurate temp reading. Infrared temp guns hate shiny. It's cool to hang with guys to like to do the same things.

[@wal2]

👌😬👍

[@Mr91caprice]

It that box considered a clash box?

[@wal2]

No

[@adaboy4z]

Ole Scurry Texas!!

[@howardgillingham4763]

How's your hearing

[@robtremble2277]

are those subs for sale

[@russlora]

Need a couple lithium banks for that amp ,,and great alternators

[@That1_CopDude]

Hahahaha Scurry?? Bro I stay in Oak Grove, literally like 6 miles from scurry, hahaha that’s wild, D.

[@wal2]

👌😬👍

[@crrisbatista9259]

I wanted two speakers like this for me to use here at home in my stereo

[@wal2]

👌😬👍

[@randomtube8226]

Neo motors are the best!

[@geoffreygreggorey6203]

Hi. Where can you buy these neo 8 subs? Intel on the company and contact info?? Best regards

[@wal2]

IDK bro, don’t think they’re made anymore

[@coltenhudnell1294]

Hey I made those. Those actually were made under the CAS name.

[@wal2]

👌😬👍

[@speedpros]

Who makes the subs

[@wal2]

Joe Smama

[@Turbo8285]

I love car audio, and grown up with small stuff to put together to work and hate seeing them pop cause in my mind I’m like watching video and I’d love to have that and o no they gonna blow them…🤯

[@wal2]

👌😬👍

[@xfhnhhgjbvcfg]

Never seen subs mounted like that before

[@klbcdaaginigaming7469]

Background music name please

[@bennyblanco14]

Those zapcos c2k series are fuckin nice

[@joecooke899]

very cool

[@wal2]

😎

[@loganbeasley7992]

Those 8’s definitely didn’t crack that windshield 😂😂

[@wal2]

Ha! You caught my sarcasm 😝

[@SheikhN-bible-syndrome]

136? I've done that with 1 10 before .. I blame the box choice

[@wal2]

This wasn’t designed to be anything but fun

[@SheikhN-bible-syndrome]

@@wal2 people always say that when a box sucks on SPL as if the box can't be fun if it is loud? And only fun if it's quiet? Not hardly . now saying that they wanted to try a new style and didn't know what they were doing (obvious from the cut line that was missed) or they only had so much wood to work with and were to broke to buy more just doesn't sound very fun But nobody designs a sub box that has bad output on purpose because it's only for fun when we all know that a speaker box that hits way louder then expected is way more fun then one that has terrible out put I built a 1 8" box for fun a few years back that I called the black powder box and it was a blast to play with (pun intended) because it did 131db at 38hz with 1 8" Kenwood slim sub and promise you it wouldn't of been half as fun if it sucked on output... It's perfectly fine to admit that the box was screwed up and it was a fail

[@bassmansl9596]

Nice 👌

[@HamiltonMechanical]

hey big D!! I know you have a sequoia as well, and I've been meaning to ask you. What has been your favorite setup so far testing in that vehicle? I'm running a single JL 10 and she's just not getting the job done.

[@wal2]

The KICKER Quad Box 😂

[@blakebrockhaus347]

In a car that big you're gonna want the most cone area you can get. So depending on how much space you have, get more cone area

[@areasonablethought610]

Hell yeah. Especially in an SUV. Four twelves should do it. I met a guy last night selling 6 Rockville twelves in a crazy customized box. If I had an SUV I would buy his setup or just buy the entire truck.

[@ronnyshallam4420]

The subs won't have their dust caps blown off if they have pole vents to release the pressure

[@kenyeltaylor9993]

💖