We Filled The ADAM T8V Studio Monitors With CONCRETE!  

Let me help you guys out with this resonance issue. What I’m about to tell you comes from experience with car audio and sub woofer boxes. To clear up or lower your resonance @ 100hz or so what you need is liquid fiberglass. Concrete does work as well, and is extreme in any case. This how this liquid fiberglass works let me explain. When you purchase liquid fiberglass it comes with liquid fiberglass resin and a liquid hardener. Mix the liquid fiberglass with the hardener per the instructions, remove the speakers from the box, and the objective is to apply liquid fiberglass resin on all inner sides. One side at a time. Once the speakers are removed lay them flat on the bottom sides first, it will take about two hours to cure after the bottoms are done take the speakers and stand them up right and do those two bottom services once they’re done lay speakers flat on their sides, And on and on until you have the box completely sealed you can apply as much liquid fiberglass as you want to get that deading effect. The more fiberglass you apply on all inner surfaces, the lower the box resonance will become, So in theory you could do this layering effect until you were happy with the resonance of the enclosure. The liquid fiberglass also acts as a great sealing medium. This is done in car audio to seal leakey sub boxes, and decrease resonance of buzzing sub boxes. Hope this helps. It’s cheap, effective and a little time consuming per the drying time for each inner side surface as you can’t do the “whole enclosure” in a single pour/pass. The ending results are amazing! This fiberglass method will work for any speaker enclosure. Concrete? Really? Y’all be trippin man. I enjoy y’all videos too!

I am an HiFi fanatic, my loudspeakers at home are self built so I am totally with you. Modding rules! To be honest, I think Adam should make a special version following your hints...

Pure gold! Thanks for this video guys!

I had an idea that I wanted to get your thoughts on. The concern I would have with using concrete is the sand particles coming loose and also of the concrete cracking over time. So I'm thinking I know of a material I think would work much better and wanted to get your thoughts. A few years ago I sound proofed my Chevy Avalanche doors, side panels with a sound proofing material made for that task called Dynamat. It's a kind of rubberized sheet with adhesive on one side and a thick foil on the other. You install it on the inside of door panels using a roller, fingers, wooden sticks, etc. It sticks very well, an d molds to all shapes and it worked fantastic on my truck. The advantage is that it can easily be cut with scissors, has no drying time. won't dry out or crack over time. and it works really well at dampening sound. You should buy some and repeat that experiment using it and see if it wouldn't work better. What are your thoughts?

Great video, again! Absolutely looking forward for your words on the Kali's, especially the "IN-8 2nd Wave"...

THIS is the content I come to youtube for. great work

Shocked I hadn't heard of this channel before! Been binge watching since last night, loving it guys! :)

That brought to my mind a uk magazine from the 80s, about diy speaker construction and some speakers made out of concrete in the shape of a pyramid

Boy, that's a massive sound improvement

I'd love to see Adam offer a front baffle mod as a separate purchase to existing owners.

"And wad do ya node...it worked" . Firmly filling yourselves into first place for instructional video of the year , extra points were awarded in the special category of "Free Foam Furnishings from falsehoods for Felines" and you achieved the all time record score in the "cosine cement challenge". Well done guys. I suspect we may never see the like of this again.

THanks

fascinating..,superb videos as ever.

This was a fun video to watch, by the way.

That’s some serious (cement) mixing skills!

Even listening on computer speakers the cement and damping certainly made a difference on a reasonable budget.

The Kali IN-8 V2’s are absolutely amazing. I got the speakers expecting them to be good due to the glowing reviews, but even with that I wasn’t expecting them To be as good as they were. I am absolutely thrilled with them.

I have been led to believe that the original Acoustic Energy monitors used latex levelling compound in the enclosure which damped the walls and made them non-parallel due to the cabinet being tilted a few degrees when it was applied. I do remember them sounding very good (30 years ago).

Thanks to this video, I now know what acoustic foam is for!

I love the content

I'm glad I'm not the only one who knows that mass matters in the cabinet. Have you tried norez or other car dampening materials in the cab itself over the wood to see how much that helps? Usually that also helps eliminate resonance from thin cab designs.

Only one question for you fellas : Will you recommend doing the same for the T5Vs ? Thanks a lot for what you're doing with this channel : from the audio-technical aspect to the sens of humor, i'm having a blast with each of your creations, and this is priceless. Keep it up PresentDayProduction !!!

Cheers

Will be awesome is you tune the other monitor and sell it in some kind of raffle for all the subs! Love the crazy experiments jaja

Great review and some pretty extreme "experiments" I was just relieved that the cat was still around at the end of the video and wasn't being used as active wadding! But wait, was that just a still shot of said cat?

Lol i can hear the difference via iphone speakers! Good job!

someone could make made a modified flight case that would of isolate the whole unit and add mass to the front baffle if it was a tight enough fit im sure it would improve the sound quality

I did such a job to a set of speakers using high density foam. Once foam expanded, I cut the excess and I made the foam surface even with a hair dryer. Anyway, before adding any cement/epoxy/foam, the plastic surface must be sanded.

Back in the 80's in the US diy community, we had what I remember as a borosilicate compound to thickly coat and damp cabinet internals. I don't recall the name but I belive it was somewhat of a pink bubble gum color.

Fantastic video guys! Very much appreciate the effort. For science! Would you guys be up for reviewing the APS Klasik 2020? Been hearing great things about it. Thanks 😊

Couldn't get the screws out of mine so that gave me an opportunity to use my new chainsaw. Always enjoy your videos!

If you can hear that of a difference on RU-vid, it must be huge. I'm undecided whether I should buy a 15.000€ amp and some cement, or just the cement. Wait I second, I gotta check my bank account ... darn it, the cement it is. Honestly, thank you for showing, this is probably a great advice for almost any resonant housing and it is not difficult to apply. Well I will not hold my breath until the Kali test, but I am excited nonetheless. And again another great video, thanks again, stay well.

Cool. Excellent video as usual. I do have quite a lot of cement spare if anyone would like me to practise on their Adams' before I get any of my own. :) Of course if Adams could put the cement in for us......

1 min 56 in to the video, hits pause. Goes and gives his SC307 woofers a tap. Sits down with a sigh of relief after hearing a short sharp 'tap' (not a booooong) and carries on with the video

Fun video. Im just concerned the cem will crack.

cement? the car audio market have for example thin but heavy rubber based resonance mats one can just glue(usually self-glue) to any surface. id try cover most surfaces inside the box with something like that

I need that shirt.

I hope you have not been eaten by the cat and that you’re okay. Hope to have some more videos from you soon.

Do you think ADAM might consider reworking the front panel after this experiment? They could add a number or letter to the product title and charge another 100 quid. Also could say that it helps cement your mixes……I’ll just go.

Thanks for the follow up. Sounds like I should be tooling up for a dense, gravity cast aluminium replacement front baffle for the TV8s. What about the rest of the range? Do they all have this issue?

Wow. If it made that much difference in the front of the speakers, imagine how much it will improve if smearing this stuff all over the interface! Going to try tonight. Pulling my Metric Halo out of the rack and popping the hood! Excited! :D

“WE FILLED OUR MONITORS WITH CEMENT!!!” “KALI CAN’T LEND US THEIR MONITORS UNTIL NEXT YEAR!” 🤔 😂 I’m gonna go tap my Kalis now … 🔊… 🚶‍♂️

Even many cheap bookshelf speakers have thick MDF front baffles, for this reason, well at least the Ax and all other series is fully made of MDF and these were entry-level line many years ago until they decided to move production to China for the T series.

For that price point... Another interesting pair: RCF Ayra Pro 6" or 8".

I was waiting to see this video to give me some hope for my T7V - not sure I want to stuff them with cement :D now I want to see what other speaker I should upgrade to, Focal Alpha 65 Evo or Kali IN-8.. or even the A7X? Thoughts? Maybe review vids?

have you ever try Abx Reckhorn? A product used for vibrations in cars and van

Hold the phone… The reason I bought the TV8s was because you said they were less resonant than the Kali IN8V2s?!!

The Mackie HR824 MK1 probably give those Adam’s a good run for their money.

For the price difference to the ATCs, you can continue the concrete pour to a slab, four walls, and a ceiling, aka “control room”.

could you please try the PreSonus Eris E66 i would really love your thoughts on these as these are another great priced speaker and just curious on your thoughts on these speakers

I use to use sand and that works great

Hmmmm.... Okay! 🤔😎

should've tried putting the cat in it

In my experience even using AX monitors from Adam, I just didn’t get consistent results with them, they sound lovely but my results just weren’t consistent, maybe it’s me or they don’t work with my ears but my room is treated and I found even the cheap JbL LSR translated consistently

Here's a thought for you: Seeing as you love your expensive ATC's. The Tannoy reveal Gold's. They featured heavily in the construction of the parent speakers and have a design that is VERY interesting. £200 quid each (so are well within the budget of newbies) and well, British. All the best.

Instead of concrete, would Rubber Bitumen paint (multiple coats) work. As this is quite good for sound proofing?

El gato ya tengo, solo faltan los monitores 😅

oh no i own the t7v now i want t concrete them 🙈 they dont seem quite as resonant as the 8's in the video though

Would a hard silicone work as well as the cement? (Smooth-on 50 for example)

Awesome video, thanks for filling them with cement so we didn’t have to 😂 I recently spent many hours at Andertons music auditioning new monitors and settled on a pair of Focal Alpha 65 Evo after auditioning them against 8 other pairs of monitors. I would love your opinion on them as I think they are the best you can get for £250 per monitor!

I know its for entertainment purposes only, but for the love of god. There isn’t a single taredown tutorial online or even a manual. Im trying to open up my t8v. And i took the outside screws but i feel like something is missing please help.

Interesting…now I’m wanting to try this, but I’ll prob refrain. Cheers

Did flopcat get to put a paw print in the concrete? If not, I’m not so sure of this method.

5:15 what is that track? Not sure what is song, and what is resonance.

I am currently making my own custom speakers and i was thinking about puting a sheet of silicone on the front panel to add mass, then also add a thin layer of foam or polyester over it to even further reduce the resonance. Is it a good idea to go with silicone?

It's not totally clear, to me, if the improvement is due to increased mass or rigidity. If it is this latter, maybe that using self-tightening cable ties around the top and bottom of the monitors can achieve the same result?

Curious... My T7V's don't make that res sound when tapping the woofer. I wander how different the construction is compared with the T8V's.

Crazy, that something for estatics basically makes the speaker worse in performance.

Did you try stuffing the cat in there? Mine would be super excited, she loves tight spaces plus, fluffy as she is, imagine the sound absorption… Actually, I might just fill my studio with cats for the best tone

What you said about the very expensive amplifier making the monitor so much better is what they say about using an amplifier with ns10. I'm sure you've used ns10s before. In your experience does the amplifier really make that much of a difference? I have ns10m Studios.

T7v vs T8v for a small studio 4x5m ? From my readings, it looks like the T7v is better balanced and little bit more precised in the medium !? My goal is to mix sound for video, not music production !

KERR ACOUSTIC K100 vs Wilmslow audio WA: TL12...what do you think?

what are the 3 way monitors in the background?

Those poor Adams! All the low notes sound like the same note in the unmodified version! I might buy a pair just to see if I can do anything interesting with carbon fiber.

After seeing this title out of context, I was rather confused.

This soo reminds me of when some genious announced that Microsoft would be releasing a new version of Windows, containing the best from both Windows CE, ME and NT; The all new heavy duty super solid Windows CEMENT. Difference here being that was a ploy, and this is just some Proper DIY with two mad geniouses to back it up and film it in 🍿 ready format. Quit your day jobs!

mine t8v do not resonate when being tapped :)

mine is not having resonance lol

Im lookin at my JBL LSR308 with concrete on my mind.

Does the t5v or t7v have this issue

Wanting to cement your relationship with viewers? :). Had to.

One way to give them more weight.

break down kii audio three 😅

I think the best solution is DO NOT TAP on the speakers and live with the stock sound... ...and perhaps invest in a more suitable cat bed.... I already hit the Ding Dong a long time ago, so I guess my Ding Dong has already shot its load. All the best, as always from the US... Phil NYC Area

I’m a bit disappointed, as a lad 50 odd years ago a neighbor had five foot tall concrete cabinets with eight inch speakers in them. Reinforced floorboards as well.

What about stuffing the Ca .......

My question is does Adams know of this issue and due to the cost, they don’t care ??

Tap the woofer on my (cheapy old) monitors... and you get a smack in the gob, mate.

I have ordered one pair of Adam T8V from thomann and one of them is louder both gain knobs being at 0 db. Poor quality monitos, I will return them! 😂😂😂

5:14 vs 5:29

I checked my T7Vs and there is no such resonance in them.

First

what

I wonder if #adam_audio have seen this and fixed the issue.... I was about to pick up a pair this week and this is the first video that even mentions this. Thanks guys!