3 yrs ago i bought my first sundown setup and it was like yep im hooked! My SFB 2k is powered back up because i bought two U.6.5's!!!! And i want two more!!! The performance while retaining trunk space is sick!!!

Thanks for going through the questions! Great products, love them!

I was blown away by that amps capabilities when you tested it last week. Your right, they are some powerful amps in a budget.

Hey Dude thanks for explaining about these amp. really appreciated

Can you run a torture test to see what the temperature rises to after a half hour of run time at full power?

Great job man.. YA why people keep.asking the same ?'s is beyond me.. but u are doing a awesome job..

Bravo excellent good video topic of choice for discussion you are the man brother

one of the main things that the full bridge design (aka H bridge) eliminates is the need for a negative voltage rail since the operation of the PWM of the H bridge basically constantly flips the polarity of the modulated square wave across the output filter and speaker, this simplifies power supply design mainly, nothing new, it's just has a bit more complicated PWM and requires more FETs

These are good amps as long as you don't try to run them on less than 1 ohm. Good for saving space!

Derrick should win an award for his unbelievable amounts of patience lol I have heard him say all of this, in videos at least 10 times.. not counting in the comments. Surprised dude hasn't completely bitten his tongue off dealing with this shit. Probably lots of jaw clenching and giving himself a minute to calm down...deep breaths! WooooSaaaaa

I just want to know one thing Derick can I run it below1ohm,.. just kidding man great video LOL. LMAO....

Good looks bruh watched it in whole lol

Man I want me one of those sfb1000's... those things looks awesome... finally some sundown amps that won't break my wallet lol don't get me wrong your Korean boards are some of the best out there for sure :)

Man. The power that comes out of the amps is like almost to good to be true! Your making me feel fake thinking this is real? Ok. I'm gonna buy one. Lets see what happens?

Great video!

Bring the SA-12 woofer test part 2 already!!

Currently running korean 4500.1 and a 250.1 class d amps. They are beasts but take up a ton of space and heavy. I would really like to see that output section that ur speaking of and compare the component differences in one of ur koreans and full bridge to fully help alot of us understand the differences and pros and cons. Always been told the full bridge run very hot. Being in Texas reducing heat is a must. Can u elaborate as two why they would or do run hotter. This video was helpful but a more in depth on the difference would be great.

I’ll stick with my Rockford since too many people are complaining about these catching on fire.

How do the crossovers work since there is a low pass and high pass but no switch to turn either on/off on the mono amps? I assume it works like a band pass crossover? Crank your high pass all the way down or to be your subsonic filter level and then crank the low pass to the high end of what you want to play your subs at?

I have the SFB 200.4 and my friend has the SFB.500.4 and both are awesome

My question is for my setup. I have four hcca 15.2 on a 12k splx amp with three 320 amp alternators and 120 ah lithium Bank. I blew my splx and I just ordered your 13k sfb to replace it. My charging is around 14.7 volts. Is that sfb 13k going to have less of a current draw than the splx?

Sundown - Can the internal crossovers be used as a bandpass for output to a subwoofer? Can the high-pass be set at 15hz/ 20hz (shallow subsonic filter) and still use the low-pass crossover at 80hz and down for the output to the subwoofers? Or does the HP crossover just control the filter for the RCA output jack to a separate amp? Thanks!

The topology of these amplifiers only share the full bridge, in what they differ the most is in the type of rail they use, sundown uses a double rail, eg:+ - 70v and the Brazilian amps use a single rail, that is, a 160v rail, What if they seem to share is the use of a control chip that is in charge of source oscillation and amplification oscillation. In addition, they share the high frequency of oscillation in the amplification phase and this is what makes both amplifiers so efficient.

Do you have to use a RCA Y splitter to just connect to the top Input of the RCA's on the Amplifier ?

What frequency you tune at and would they be able to produce the power between lowmid to highs

I just got a sundown sfb 2000d and I am powering a sa 12 version 2 wired to 2 ohm in a custom box tuned to 35 hz. what hz test tone should I set the low pass and high pass too?

What fuse do you recommend using on a 500.4 sfb?

Are you planning to make a preorder option for sfb or salt amplifiers that are coming?

Can I run one those on 2 Sa 15s d4 or would it be overkill? I'm running the sae 2000d on them now in a qbomb ported box.

Good info thx

I just picked up the sfb 2000 since I needed a small amp that puts out 2k at 1ohm. I had the sae 2000 but it's too big to mount to my back seats in my 2020 charger scat pack. Can't wait to get it wired up. It's powering 1 X10 v2 just waiting for down4sound to make my box.

DEREK Question... i just purchased the SFB 1000 and i want a matching amp. Will the SFB 200.4 work good with Focal Es165 K2 components? I have 2 sets. Or should i wait to save for the SAE 100.4?

I just received one of these amps. This may be a stupid question, but from the few amps I have ever owned there were always fuses on the amp. I see no fuses. I have a fuse at the battery. Am I supposed to wire fuses myself near the amp also? Sorry but I did not get an owners manual in the box.

Is there any way you can tell us the efficiency on the amps? Sundown for the win!!!

Plugging both RCAs is ok? Even though it says output… I’m running 5000 sfb and was wondering about that. Does it make a difference running single amp?

Serious question what's the power ratings on the 200X4? Is it 100 at 4 ohm per channel? 400X2 bridged? Also why is DOWN4SOUND showing them available already?

Hey if I just run 1 sub woofer do I just hook it up to one of the outputs or hook it up like a normal bridge?

Can a SFB 2000D can handle u12 without clipping using stock altanator & update XS battery? Also so these amps burn up like what others say?

What are the fuse ratings for the amps?

Will there be 2 ohm models available like other full bridge amp brands have?

how hot do the amps get? time wise

Do you need both positives and negative to get full power from the sfb 600d or can you run a single positive and single negative? I have two 4ohm dvc subs

I ordered a 1500 watt sundown amp I had it for 3 plus months I installed it yesterday I hook thr power,ground and remote wire. It went straight into clip light with no subs hooked up... I emailed the company already to see what to do

Do you have to hook both sets + and - ? Does it make better power or it doesn’t matter?

I have a SFB 1500 I just turned the car on, and now both my blue and red on the amp blinks, no music..but have highs..what do u think? Duff from N Philly..

these sfb amps are they considered 2 channel amps stereo? Or would I use one amp per door speakers as like a mono set up??

Cant find any wattage numbers anywhere for the SFB 1800.5D 5 channel amp. Any word on those? I'd love to use one to replace my ppi 4 channel and sundown sae2000.

I have the sundown sfb 1500 on two mojo 8's, running on 4 gauge power and ground,do I need to upgrade my wiring to get the full power out of this amp?

Do you have to use both grounds and positives to power it?

Good information...even if you appear aggravated when telling it. 😂

How come I grabbed one of the first sfb 3k’s and got all stoked bout the new bass knob and it came wit a plain Jane one wit no clip light or anything special? I looked like a Toolbag talking trash to my dealer bout how these come with the new hotness and we open it up and I got the hifonics (jk) basic a.. knob that boss amps come with. Lol. Let me know how I can perhaps scoop the knob that’s actually for these amps plz

I appreciate your information on here and your Facebook page and I sent you a request and want to get back into the car audio world after nearly 20 years if being away from it

You talked about putting to much voltage to the SFB. What would be the lowest you would want your voltage to drop to while pushing it full tilt?

I am intrested in the sfb500 watt amp for my harley.how much is it and would it be cheaper to goto you and pick it up

i love your product, i bought a woofer at the yard sale. and got hook. so i bought sfb 1500d ,can you do a video on setting of the amp. like the gain,crossover, bass boost

Can you do a video on the 1800.5 channel amp dont understand how it is rated for example 1-2 channel at 2 ohm - 300 w rms 3-4 channel at 4 ohms 200 w rms 5 channel, at 1 ohm: 1000w 5 Channel; at 2 & 4 ohm : 500 at 2 / 250 at 4 so for channel 1-2 does each speaker have to to a 4 ohm to get the 4 ohm power rating or will this bring it down to the 2 ohm not sure if it is bridged like a mono block

Hey Derek I want to switch over to a sundown woofer I have a Rockford 1500bdcp at 1ohm it's rms is 1803 what sub do u recommend I'm putting it in my work van thanks

Just bought the sfb-2000 and paired it with brand new x-8s dvc4 running at 1ohm.. my question is I can barely turn the gain up 1/4 way before the amp starts clipping.. is it super sensitive or could there be something else going on with my setup

I think my rca on my sae 3000.1d went bad... would this be a better amplifier?

hey I have a sfb 1000d and my clip light stays on and I'm also not getting any output to the subs now. any recommendations?

Man I'd love a 200/4! 😫😫😫😫... I love the idea of this line of amps

Can i use 1000 or 1500 on your shallow 10s for my harley ? Do not wanting to go with sound digital.

Hi Derick, my question is can you control 2 sfb 5000d's with 1 bass knob? Thank's in advance.

How do you gain match 2 SFB amps to a single d1 sub? Due to them being full bridge, don't they have to have a load on them when powered up?

What's up guy, I have a sundown audio sfb 3000D. My bass adjust makes noises when I adjust for more bass so I bought another one to replace. I hooked the new one up and now my amp is locked up in protection mode. Please please please help me!

What would the tune look like on the sfb 1500d if I'm running 2 Sundown Audio SA-12 D4 Classics at 1500 rms?

Ok my local shop pared that amp to a mojo mini 8 . The clip light stay lighting up is it the sub cant handle it or is the amp to small

What does the remote knob with these units do??? I had an SFB2000.1 and the remote knob had “Bass Gain” printed on it, but I switched for the 5k version and the remote for it has “Bass Level” printed on it. Add all this to the fact that the screw on the unit itself that’s labeled “Level” is actually a bass boost adjustment and it’s pretty confusing. In the pdf manual that Sundown finally released this week for these amps, it just says the remote attenuates between the lowest setting and highest setting. WHAT SETTING IS IT ADJUSTING???

You mentioned high voltage but what about low voltage?? Like 12v?? How would it run there?? Would it be okay/healthy?

I just blew a 1 of my 2 sa v2 18s with my sfb5000d . Now it’s stuck on clip. Can I turn that off some how or is it broke for good?

What I wanna know is if running below 14.4v, say hitting 12v bad for these amps? I see the dual runs to the amp and I know not everyone is gonna be able to do dual runs or keep up with 14.4

Two 12" Zv5 D1 1ohm subs on an SFB-8000D at 1ohm or a SFB-13500D at 1ohm? Think the SFB-13500D is too much?

I have an sfb 1000. I wired in a ds18 v2hl line out converter. Have a strong ground, 150amp fuse, and sky high remote wire ran to an ignition wire off my stock head unit. I hook the amp up with only power ground and remote and when i turn the car on its in protection mode (protect light blinking), clip light solid, and power light has a slow blink. Not sure why its doing it.

How much can I turn the gain up on the amp because I was told if my clip light comes on it will be fine considering the amp?

If i have a 15 inch sundown ZV3 and a SFB3000D what would be the best wiring diagram?

Question on how to set the high pass and lowpass filters when running the sfb amps on subwoofers? Thanks for videos and all the info.

Hey I just purchased a SFB 3000d and the yellow clipping lights stays on even with all levels down down! The yellow clipping light comes and stay on immediately the amp receives power! What can I do to have that clipping light go away?

i would like to know how many amps does the 8000d need to run at 14.4

Ok it's been like a year now so what's the deal on reliability? Do alot of these come back? Could I get away with 4 gauge wire for 17' and 2 ohm load?

Which a better 1500.1 the SAEv3 or SFB?

I would like to see a demo with Neo Pro 8s. I have not found any videos with these amps running in high pass yet.

and a full bridge design could technically push the same current as the SCV line's half bridge with the correct selection of FETs, i have noticed that the SFB uses the smaller TO-220 style FETs in the power supply rather than the bigger TO-247s like the output section uses, which I find interesting, the SCV line uses all TO-247 style... this may be part of why the amp shows high power at higher ohms, but hits a limit on power as you lower the impedance, as the power supply's rails collapse as more current is drawn from the amplifier section.... which isn't necessarily a bad thing as that allows more power as the impedance rises during play

What line fuse size to use on the sfb-3000? Noticed these amps don't have fuses. Thanks.

What would power output be @ 3ohms on SFB-1000D?

I bought 2 of these amp can you explain nto me how I would be able to wire these together or can I even wire them together lmk please

Do these have the same hum as Brazilian fb amps?

Will there be a clip light bass knob comming out? Because the 3k didn't come with one

Do you have to use both power inputs?

I have a 2000rms xv2 custom with 8 layer spider and zv4 could I run the 1k to separate coils?

Is the clip light on the sfb a safe bet when adjusting the gain? Also will those of us that have the 3k be able to purchase a remote knob with the clip light in it?. Thank you in advance

What about the crossover modes, and frequency ranges?

I see this question still has not been answered, I will ask it again. Compared to other full bridge amplifiers, at what rca input voltage do these perform their best at? Many other brands with this similar topology have been proven to clamp more power at 2v rca input voltage vs running it higher than that. I've tried giving my sfb 8000 around 2v or so and as well around 4.5-5v, using the 80prs as the source unit. I haven't noticed much difference, but I also have not done enough testing to justify at which voltage the amplifier prefers. I'd greatly appreciate input on this topic, as many of us who are running this line of amplifiers probably have the same question. Thanks

If I have a northstar 190 battery, stock alt 170 , 1/0 big 3 , you think I can run an 5k ?

will it run the sa 10 inch subs

My Sfb3000 is putting out DC to my sub Sub stays pushed out I open them up and I don't see anything burnt or anything what do I need to change in the amp so I could tell the repair shop

My amp keep going on protect mode but ain't no wires or nothing touching when I first got my amp I had this problem

I just got my SFB-500.4 amp I was wondering what size wire do you recommend to use?

What Sundown amp do you recommend for 2 uv2 12s because I can’t afford a salt lol 15:27

are they good for phoenix gold elites 2-12s TI312D4X

I just order the sfb-1000 waiting on it. Will this amp hot after 30 min playing time ??