Fi Neo 4.11 unboxing + build update: 2 · 15" Fi Neo 4.11 subs w/ 16,000 RMS Watts on reserve!

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" Low Hertz High SPL " all one word.
2 Taramps Bass 8Ks each at 0.7 ohm aiming to clamp 10kW. It's best to have more than enough power then to not have enough. Especially because we all know we're all going to upgrade someday. This will save you from having to buy new amps. Plus reduce chance of clipping by never needing to overwork amp(s), as long as your voltage remains healthy.

[@956Bassaddict]

This video was the reason i bought my 4.11 18s. I'm a big fan of Fi subs too. Before the 4.11s i was running 4 sp4v2. Monster subs

[@956Bassaddict]

@robertdavidson5903 the sp4 are excellent subwoofers i was running the sp4 15s on a 4rth order but i wanted more cone area that is why I bought the 4.11 18s and i built a 6th order to be more windy and musical. I like the 4.11 neo. They can handle way more power i order mine with the omega voice coil and 1 extra spider. 👍🔈🔊🔊

[@lowhertzhighspl]

I ordered the same options for my 15s. I envy/admire your build bro! It's the exact same amps and appearance I would have done if affordable. (Although I may choose 21"s if would fit but there aren't many vehicles they will fit in). Which state are you in?

[@956Bassaddict]

@lowhertzhighspl I'm in Texas. I really like this subwoofers too.

[@Siryn]

Just got my 4.9's! Can't wait to get them in my car. They really are beautiful subs.

[@lowhertzhighspl]

I look forward to seeing yours!

[@bassanonymous4923]

Woo wee.. them are going to be some ground shakers 🔊🔊🔊💪🏽

[@ROTTBOXX]

I cant stop watching this. Them subs are beautiful

[@lowhertzhighspl]

Plus they smell good! LoL Unlike my Skar DNR which put out a pungent coil glue smell whenever pushing it above maybe 50% of it's rated power. I'm not knocking the DNR because that single 15" with an undersized port area so far still out meters these TWO 15" Fi Neo 4.11s. However, I guarantee these Fi subs will break the 150 dB mark with doubling the port area and becoming broken in. Oh plus once I'm actually clamping their rated power. That'll be my next video, clamp time for comparison before and after lithium.

[@ROTTBOXX]

@@lowhertzhighspl yea if never seen the grey glue before. That's a new one

[@katecota8532]

@@lowhertzhighspl that's how I felt about American bass and skar, ab has very distinct smell, good though even after motor break in.. I need more power lol hate being poor!

[@210Designs]

Monster subs man! They was going to destroy that back hatch 😂 Which I’m sure you’ve already prepared for that 👌🏽 Thanks for sharing!

[@lowhertzhighspl]

Thx for always commenting!! Love your work!

[@210Designs]

@@lowhertzhighspl - Always bro. You have great video content 👍🏽 Thanks for your support as well.

[@HOODCHRYMER]

Can’t wait for you to install them! I’ve had my eyes on these for a long while! Saving up to get Two 18’s

[@lowhertzhighspl]

I regret not ordering 18s!! Now I see I could've made them fit! Mfr! You know what this means.. Gonna have to buy 2 more 15s, and wall it! Ugh! C-pillar daily driver.

[@alexleonard1852]

those subs look so awesome. Gotta love fi

[@JoseFlores-fm2vc]

Amigo! Awesome purchase. I can’t decide on which subs to go with. The ones you mentioned or sundown UV2’s. The size would be 15’s and I have a Salt 8K amp to power whichever sub I go with. I was also thinking about the Deaf Bonce 4515R. Any input is appreciated bro. Thank you.

[@lowhertzhighspl]

I wouldn't go with 4.11 (4in coil) if have only one 8K amp. Each 4.x may need an 8K if you want the most out of your subs. Fi 3.x would be better, (4in coil requires more power) which I believe the DB4515R is as well. Put a lot of time, research and effort into the enclosure and electrical.

[@JoseFlores-fm2vc]

@@lowhertzhighspl thank you for getting back to me asap amigo. I appreciate your input and knowledge. New sub 🤙🏼

[@DCBDesigns]

Nice man, il be running 8 of the team v3 18's, Whats the length of ur ports on that box? Looks like long ports. Tuned low i see! Slam on them!

[@lowhertzhighspl]

8?! Damn. I originally choose Team v2 when they gave me the choice of v2 or v3 but then 3 months into the build I switched to Neo 4.11 and man I'm glad I did. The original enclosure had ports that were like 36" each side but port area was half as what it needed to be. The enclosure I built uses 16in² per NET cu ft vol. and 25" length tuned to the subs exact Fs 34.6 Hz. I'd love to get 2 more and turn it into a wall but tbh I don't think I wanna put more money into it bcuz once I go lithium I'll have $10,000 in car audio product in it. Not to mention hundreds of hours researching designing installing tweaking etc but that's the best part imo. Not the competing although that's fun too except for the long drives. How many watts you gonna provide each sub? I wouldn't exceed 7,500w if using 3ft³-4ft³ per sub. Or go with 5ft³ per sub (if feasible) and so you'll need is 4,500w each. Plz keep me updated! I love Fi builds!

[@dfwravefam6187]

i just got my fi4.11 15s in along with limitless batt.. ready to get these suckers pounding

[@lowhertzhighspl]

Heck ya, how is your build coming along? Which LL batt? I really wanted their Gorilla G30 or G50 but they stopped making those higher voltage batteries. But I found something just as good imo.

[@Giovanni-rr4ht]

Want to turn my NEO 3.7 18' into 15' BUT don''t know where to go to grab parts? Do you know where I can go to and find this/these parts?

[@lowhertzhighspl]

FB msg Fi. They are very informative and helpful.

[@shxmdog5751]

Did you ever turn the power up to the subs? Want to know what the top limit they can take of clean power

[@lowhertzhighspl]

Good question! Yes! I recorded it but need to figure editing. I have several vids waiting to be posted. Clamped 6650W each on just 1 AGM and super cap.. but I'm installing lithium as I write this so.. I'm presuming I'll hit 15kW which could get me to 156.5 but there's no way to know since somethings are getting changed up. Thanks for checking out the channel. Stay tuned.

[@albertpung7250]

That subs will slam wayyyy harder in another box guarantee.. it will defiantly slam with this box but yeah a custom box sick ass setup🤙🏽🤙🏽

[@lowhertzhighspl]

My new custom larger enclosure is almost complete. I'll upload vid of it soon.

[@lowhertzhighspl]

Just uploaded it.

[@albertpung7250]

@@lowhertzhighspl how’s the difference from your old enclosure? Looks bad ass🤙🏽🤙🏽

[@davidperry4013]

When get my Fi Neo 3.5 12 inch. I’m putting it in a sealed box for max sound quality and it’s going slam very hard for being sealed instead of ported or bandpass. Also the SQ is going to be awesome.

[@albertpung7250]

@@davidperry4013 if you have room for a 4th it will have major output of sound quality over a sealed box.

[@ceciljones1248]

How are those subwoofers holding up on those taramps?

[@lowhertzhighspl]

Great match! 0.7 ohm and periodically checking for gain walk and ensure no clipping. Fi subs are the real deal. If I would do it over again I wouldn't go with Taramps bcuz on the oscilloscope the peak of the wavelength looks like a snowcapped mountain. That can't be ideal. But I don't clip these subs so.. all is good. Currently have them inverted which dropped the Fs by 1Hz. But had to turn down the LC7i gains because apparently inverted need less power.

[@10krms8]

Waiting for the penta 22 to b out it should go for production

[@lowhertzhighspl]

Hold up, that thing is actually being produced? I figured it didn't make it past prototyped.

[@jeffersondelira2706]

I'm looking at getting a 4.11 18 during spring time but what amp should I get for it? I'm looking at getting a crossfire XT 6K and run it at .5. would that be a good combo for it?

[@lowhertzhighspl]

No. Go with one ohm because Fi's one ohm is actually 0.7 ohm whereas half ohm is actually 0.35 ohm! Make sure you're electrical is more than enough otherwise when wired below one ohm you will clip your sub and kill it without plenty of batteries and alts. Clipping is killing. I suggest XS Power Super Bank Capacitor. I use their 1500f one SB1500-75 plus 2 XS Power LTO batteries. Plus I charge at 15.5V. I see Limitless Lithium now has their Gorillas in stock! (For 15.5V setups). If I didn't already have $3,000 in XS Power batteries, personally I'd try LL Gorillas along with their super cap under the hood. Super caps are important for competing. So is lithium!

[@jeffersondelira2706]

@@lowhertzhighspl alright then thanks for the heads up man.

[@cjon24s69]

Hell yeah man how long did fi take to get your order shipped? I want the neo 3.5s but I dont want to wait 45 days like the website says it can take up to that

[@lowhertzhighspl]

Depends on several factors. Nowadays typically I'd expect 3 months (90 days) due to stimulus money being spent left and right. My first Fi subs Team took 2-3 months. The 4.11s took 3-4 months due to an order change. I don't think anyone receives them in 45 days but either pay a lot more for Sundown or PSI or Crossfire, or Deaf Bonce, and possibly get them a month sooner or save a few hundred and wait the extra month which allows time to perfect your setup. Plan build it all except the sub install. If everything is already to go, then make it better while waiting. My point is.. Fi is worth the wait!

[@cjon24s69]

@@lowhertzhighspl I ordered mine at the end of April and I got an email yesterdat saying they are being built right now

[@zacharyhafer2806]

@@cjon24s69 pull up a chair you got 2-3 more months to wait yet. That email is meaningless in all honesty. Fi lost my business bc of how slow they are and their recent motor designs have been weak. I ordered a built to order dc lvl 5 and it shipped on day 4 of waiting. By day 9 i had my sub in hand. To hell with waiting on fi 😂

[@cjon24s69]

@@zacharyhafer2806 I was going to order 2 level 4 18s but I got the Fi neo 3.5 18s instead. And yeah thats fine Ill wait anyways bc the price of wood to build my box has literally doubled in my area 🤣 Ill wait til it goes back down Im bot spending over $300 in baltic birch to build the box I guess I might have to use mdf 😂

[@davidperry4013]

@@lowhertzhighspl Some of those sound quality subs can cost up to a thousand dollars or more. I rather save a few hundred to a thousand dollars and order a Fi Neo 3.5 sub 12 inch and wait so I get sound quality that rivals that of the other leading brand American made SQ subwoofer. I don’t think Brazilian amps are not very good at sound quality though.

[@SailingAnja]

Late to the party but i was just looking at these Neo's for my next build, also 2 15's in my tiny hatchback maybe i should change my 2 smart 3k's for 2 5k's lol

[@lowhertzhighspl]

Depends on volume used. If closer to 3ft each, then need 8Ks. If closer to 5ft each, 3Ks will suffice.

[@HOODCHRYMER]

Would you prefer these over the Teamv3’s?

[@lowhertzhighspl]

Yes.

[@luii3157]

How do you install those rubber ain’t vibrations and which ones would you recommend I needa do this I need more space

[@lowhertzhighspl]

The ones in between the amp rack and enclosure or in between amps and rack?

[@lowsmohammed2676]

These subs dont come in 12''?

[@leonisreall]

Are these noticeably louder then the team 4 v2s that you previously had?

[@lowhertzhighspl]

Sorry, I can't say because I never used the Teams. I'm very impressed/satisfied with the Neo 4.11s.

[@jefferycarter1791]

Can you please let me know if the fi Team v3 subs are as good as the ssd's v4 ,I was thinking of picking up a pair tonight.

[@lowhertzhighspl]

SSDs? I'm not familiar. Can't ever go wrong with Fi Teams but their Neos are also on point.

[@jefferycarter1791]

Thank you ....Fi just sent me an email ,said they're testing my subs and being packaged. 2 12inch Team v3 ......Brandon, thanks for the help and knowledge you share with us all its appreciated....

[@katecota8532]

Drooooooolllliinnggg.....

[@lowhertzhighspl]

3:00 theoretical 20,000W. (Not clamping) I'm clamping around 14K

[@taurean2realnofilter523]

How long does FI take to build? And ship

[@kullar55]

About 3-4 weeks

[@lowhertzhighspl]

Which sure beats the several months I waited. Sometimes they get them done in one week depending on business coming in. Glad they switched things up. So worth it the wait!

[@lowhertzhighspl]

Trust me, these subs are with the wait and I waited 6 months bcuz of a mix up which was partly my fault for switching last minute. Give them a couple months to fully break in. Or 40 hrs of play time imo but they seem to handle anything I give them which is now up to 13kw (6500w each with more to come (16k) once on Yinlongs)

[@taurean2realnofilter523]

They come on 12" bro??

[@taurean2realnofilter523]

@@lowhertzhighspl 😂torture man

[@chadbeverly4926]

What's the peak power on these ?

[@lowhertzhighspl]

A lot! But "peak" wattage doesn't mean much. I would presume they can handle 7,500 W each for a CONTINUOUS burp or pounding. But all depends on size of enclosure and port area and cone size (12" vs 21"). If large enclosure with large port area it'll be closer to 5k whereas with smaller enclosure and tighter port area it could be more than 10kW. Most continuous power (3 to 5 second burp) I've fed them with (BEFORE impedance rise) was 22,000, whereas with box rise it was 13,000 W combined but this was on inadequate electrical. Again that is not the peak wattage, but is what I clamped BEFORE I switch over to lithium. To determine true peak handling I would need an SMD tool to show me what the split second peak is. Not just a few seconds burp. Based on all this I would guess the split second peak peak would be closer to 20,000 Watt for EACH sub! These subs are tanks based on what I've seen. I'll be posting more videos with higher power this SPL season. Going Lithium. Might even try wiring down to 0.35 😬

[@808kea808]

how much cubic ft is that box?

[@lowhertzhighspl]

Which box? The one with the subs back port back was like only 6ft but the one I built is 8.5ft and the port is much larger and much louder. These 15" neo subs need 4ft-5ft each and port area of 16in² per cubic foot NET volume

[@quinta5765]

Do you wanna sell your XS D3400?

[@lowhertzhighspl]

I will once I receive my 80ah LTO battery but DroppinHz SUCKS! Taking forever with them! I ordered in February. Will NEVER use DroppinHz again!

[@jimt5683]

How heavy

[@lowhertzhighspl]

Around 65 lbs +/- 5

[@dghoop1]

Guys to develop superpowers, protect yourself from other people's bad energies, the devil and eye hallucinations, you need to train your body physically like crossfit with work on boxing bags, then bad energies and black dust from bionanorobots (sometimes transparent, but it is still visible as distortions in the air with the feeling of a transparent gel around in space) will not be able to cling to your body and nerves of the eyes and you will not see and feel pain, you need to train all muscle groups so that there are no weak spots and mentally imagine how you tear apart the pain and the picture in front of your eyes with your hands, also imagine how this dust burns up turning into emptiness in this way, you mentally destroy this shit this is the beginning of super strength, exercising and fantasizing, you can develop other superpowers in yourself, but for each person individually, it will be easier to get some kind of strength (The principle of work is in the transformation of physical strength into mental strength). Also, minimize the amount of food, it is best to eat rice cooked in water like the Shaolin monks, hunger and a minimum of different flavors, you will redirect the energy from the digestion of food by the stomach to the strength you want! Another tip is to eat lemons or citric acid - (0.5-1 spoon / l dry with at least 3 cups of water, it's easier to drink and a large amount of water will reduce the overall acidity - my record is 5 spoon / citric acid per day) this will speed up your metabolism and protect against poisons, spoiled food and metal salts, if you have any questions, ask! I am writing through translator from Russian so there may be problems with understanding the text. - ** -

[@zacharyhafer2806]

Eating lots of rice can be bad for your health. Raises your triglycerides also which can be extremely bad. Dont believe everything ya see and hear

[@lowhertzhighspl]

Very interesting 🤔 and deep to say the least. I can't help but wonder if maybe you were you stoned or shrooming when you wrote this? Surprisingly no misspelled words which tells me you weren't drunk but then again, most auto correction is on point nowadays. Thx for the advice (well, for some of it). Still was interesting and thought provoking.

[@dghoop1]

@@lowhertzhighspl I'm from Russia... and I'm writing through google translator, so it can be more difficult to understand...

[@squirrelnasty]

Get you a little drink a water bro

[@allmotorhash]

covid suxs

[@lowhertzhighspl]

For sure!