Today I decided to build a subwoofer to really get the depth in movies, it's not supposed to be loud but it's supposed to dig deep and for sure it does! Camera, iPhone 12
so nice to see a grassroots build. a normal dude working off a pallet in the yard with garden variety tools and affordable components. thats where a lot of us are at. cheers, Davis
Nice build, An alternative is if you make the enclosure 85 liters (3 ft3) and tune to 18Hz adjust box to accommodate the long vent required. This will have some advantages. Much smaller boxes look better and cost less to make. The group delay will be less than 24ms at 20Hz, It will handle 249 watts and 108db without over cone excursion, have an f3 of 21.7Hz F6 of 16Hz. I am going to build two of them. Lower group delay sounds better. And having two subwoofers will give me a nice 3db to 6db gain.
I know, at the time of this build I didn’t know this. I might rebuild the box to a more reasonable size so it only goes down to 20hz -3db, then I should also be able to push more volume out of it.
The GRS high excursion subwoofers are awesome sleepers! Not many people know about them. I've modeled their 8 inch HE subwoofers and they can get down to 20hz
I built a sub at 10 Hz resonance, for bass you can feel. It worked, however it reduced the SPL from the frequencies above. I suggest to everyone, to stay in the 30 to 50 Hz range as not to degrade the frequencies you can actually hear. Just a suggestion.
I built a cilindrical subwoofer as svs pc-2000 external dimensions and only 90 liters intern with resonance frequence at low volume 1 to 5 watts has 11 hz ! and at mid volume and high volume the resonance get down to 9.4 hz !!! yes , exactly at this frequence the passive radiator has the longest xmax and has ~ 100 mm xmax 🤐 at 800 w rms ! At my subwoofer in 30-50 hertz region it feels very good at the floor you walk and cabinets furniture of the room and below 30 hz also ! I wanted at the begining to get a jtr subwoofer, but because the shipping was too high plus its price 4000 $ i decided for half price to build something to get very close to him and I succeeded...the extreme lowest frequency that the subwoofer plays and moves is 7 hz !!!!! (of course with attenuation of about 10-12 decibels) (even if the amplifier below 9 hz starts cutting all the way up complete to 4-5 hz !) and it's very hard to find a speaker with a large excursion to play from 10 hz linear up to 200 hz and more, but I found this one !
That GRS woofer is basically a Ultimax 12 with less xmax. It models near identical to my Ultimax 12 in a box around the size you made in this video. My Ultimax 12 is just about flat too 16Hz. I need to watch the rest of the video to see how it turned out as I'm only 30 seconds in so far.
I wish I could’ve gone with the ultimax, but the time of this video the budget wasn’t there. So I used the grs, the only difference I have found is the volume. The ultimax can deliver more volume but 102db is still enough for me.
@@HifiMan12 How big is your room. I'd think you'd be able to squeeze more output from it than that. Or is that 14Hz? My pair of Ultimax 12s easily do 120dB after room gain at 16-20Hz when pushing 50w to each sub. You can simulate room gain in WinISD and it's pretty accurate. Both in WinISD and measuring with my UMIK-1 both verified I was within a couple dB. I used a amp clamp and multimeter to set power.
I built a cilindrical subwoofer as svs pc-2000 external dimensions and only 90 liters intern with resonance frequence(tunning frequency) at low volume 1 to 5 watts has 11 hz ! and at mid volume and high volume the resonance get down to 9.4 hz !!! yes , exactly at this frequence the passive radiator has the longest xmax and has ~ 100 mm xmax 🤐 at 800 w rms ! At my subwoofer in 30-50 hertz region it feels very good at the floor you walk and cabinets furniture of the room and below 30 hz also ! I wanted at the begining to get a jtr subwoofer, but because the shipping was too high plus its price 4000 $ i decided for half price to build something to get very close to him and I succeeded...the extreme lowest frequency that the subwoofer plays and moves is 7 hz !!!!! (of course with attenuation of about 10-12 decibels) (even if the amplifier below 9 hz starts cutting all the way up complete to 4-5 hz !) and it's very hard to find a speaker with a large excursion to play from 10 hz linear up to 200 hz and more, but I found this one !
Sorry for the late answer, I went to a store that has one of these big saws. For example Bauhaus in Sweden has one of these big saws. I just couldn’t bother cutting myself!
Hello mate. May I pick your brain for a moment please? I have a pair of leak sandwich 600 speakers (26" tall. 15" wide. 13" deep) they have a 12" woofer and I'd like to put a 12" passive radiator in them. Do you think it would tune? Thanks in advance. Enjoyed your video
Hello, do you have a serial number of you driver? It's usually behind the driver on the magnet! It's pretty hard to find the answer, but it may take some while.
@@HifiMan12 good morning mate. Thanks for getting back to me. I looked at the back of the driver but no serial number. The driver cones are made of polystyrene sandwiching a piece of tin foil (hence the name leak sandwich) which was groundbreaking stuff in the late 60s early 70s. mine are a 1971 pair. I'll look in the other one. Great speakers by the way. I drive them with arguably the best integrated amplifier under 100 watts ever made. SANSUI AU 717 🌚
@@zukispur5493 Oh, ok. But my answer to the question is yes, you can put a 12" PR with a 12" but you may have to play around with the weights for a bit to get it right!
Why is everyone building infra subs now? LMAO built my Infrasonic tapped horn about a month ago and and since then i see more and more builds to go stupidly low. Very nice build man! Just needs a nice coat of tuff cab pro now :D
Ha, I realised why everyone is building these subsonic subs. It’s pretty cool to have a sub that goes that low, but there’s always a draw back. Cone excursion, because of that you will lose a lot of volume so I made a new version of subwoofer. Video coming soon!
