Hey my friend this is a very informative video. I have two of these 300/4’s and hopefully I can get to them in the next couple of weeks and I will let you know what I find and I thank you for possibly pointing me in the right direction.
I have one of these amps that I need to pull apart to clean the switches on, would you recommend some dielectric grease in this area just to circumvent this corrosion?
is there a shop you recommend for JL repair? my 300/4 v1 is doing exactly what you described. the rta graph when playing pink noise is very weird, and the dd1 doesnt even want to show signal sometimes(not the head unit or rca's)
how do you fix a gain knob in a amp because everytime my amp hits my gain knob moves around and make the amp goes into protection how would you fix that ?
hey I know this was from a couple of years ago but this is my first time attempting to fix an amplifier and I can't figure out how to get the board out of the enclosure. I was trying to get the output terminals from the inside so I was taking the input board off but I can't get it back on. is there a way to do it without taking the entire board out?
I have a jl 1000/1 i brought it to a local shop and they said its running to hi voltage and i would have to send it to jl audio. It just blows subs if i run it, also the little caps inside get so hot their actually blowing outward, they said theirs to much voltage running through it. I am curious if i should just scrap it or pay to fix it if its a small issue
I accidentally had a 12v touch the ground on the rca and now there is no sound on any of the Channels on my 300/4. Do you think it could be a burned trace?
Hey man thanks for sharing the video. I have a 450/4 and I have a low ohms light channel 3 and 4 is working but 1 and 2 doesn't. Would have an idea on what you think it is?
It's hard to say, but if I were to hazard a guess, probably shorted output transistors in those channels and 50/50 chance it damaged the driver modules.
I have a 500/1 that comes on for like 10 to 15 seconds it plays the music and then shuts off. Im wondering if you will be willing to fix it and ill pay to ship it to tou
Nope ive never had issues with the LEDs and their wires. Its all put back together now. But its not hard to figure out. Black is GND, Red is power, and then its the other 2 you have to figure out.
Hi, I have a JL 300/4 v1 amp and when I wiggle the power and ground cables beside the remote wire the red thermal light goes on and off. Any ideas why? Could the daughter board be loose? Sometimes when the thermal light is on the speakers distort badly
You mean the spring clamps? there is a hole on top. Grab a stout allen key 90-degree wrench, and put it inside the whole, and pry towards you which wil put downward force on the spring. it will then pop off. Be careful, you can bend/shear the spring if you overdo it. to put them on, you need to tap it back into place until it bottoms out.
anyway i can send an amp over to you for repair has a low ohm light on 300/4 and maybe check a 500/1 make sure its up to par works fine at the moment ..
I have a Slash 500/1 that is dropping volume once in a while . Still plays loud but doesnt hit hard . Someone mentioned to me that the amp has cards in it , which you just showed , and the plugins from the card cause this sometimes . Have you seen this ? He called these daughter cards . lol
"Doesnt hit hard" is a very vague and broad statement. Could be alot of things to internal faults all the way up to bad connections on the ground/power/speaker, loose/dirty switches on the crossover, etc.
I did all the cleaning . Pots , switches and the daughter board plug-ins. Then I stumbled on what I think it is . My ppi par225 . Either volume knob or op amps im thinking . I do have a question on setting the voltage on the speaker lines . I'm putting a par245 in now . So should all controls be flat on that to get the my 32 volt speaker output ? It did still hit but the bass would drop a little . When I pumped the eq volume I would get it back
My amp has the same problem but the power light is dim its not compleatly lid UP and the sound is weak like in the video did the same jumping wires and its still the same someone help??
Hi can anyone tell me JL a4300 amp Where is the fuse located?the amplifier does not light up when plugged in, so I wanted to check if it has an internal fuse.Thank you for all the information
@@THEtechknight Hi,,,that is, you can say that these are disposable devices, which when they break down, even the fuse cannot be checked, it is something similar to the iPhone, so it cannot be dismantled.😁😁😁😁
@@THEtechknight I understand, but this is only one of the few companies that makes its equipment only like the iPhone. Why don't most manufacturers do this when it is known that JL has such a policy. if it breaks, return it to the service without being able to check it yourself, Mtx, Hifonics, Alpine, Pioneer, etc. they don't do it. That's why I avoid this companyJL
@@THEtechknight even Boss, which doesn't have a super reputation for quality, has this type of protection and fuse..i don't blame you it's just my opinion i wanted to know more about this equipment but i just think it's highly overrated😆😆
Thanks brother - your video showed me how to fix my amp. Much appreciated.
Hey my friend this is a very informative video. I have two of these 300/4’s and hopefully I can get to them in the next couple of weeks and I will let you know what I find and I thank you for possibly pointing me in the right direction.
thank for the video i have the same amp exact problem gonna try it tonight.
The 300/2 and /4 are absolutely amazing amplifiers, where SQ is concerned.
Great video
I have one of these amps that I need to pull apart to clean the switches on, would you recommend some dielectric grease in this area just to circumvent this corrosion?
I own a Phillips 5.1 system, recently I noticed there is low volume on the rear right surround channel compared to the other channels, why?
is there a shop you recommend for JL repair? my 300/4 v1 is doing exactly what you described. the rta graph when playing pink noise is very weird, and the dd1 doesnt even want to show signal sometimes(not the head unit or rca's)
how do you fix a gain knob in a amp because everytime my amp hits my gain knob moves around and make the amp goes into protection how would you fix that ?
Nice!!!
hey I know this was from a couple of years ago but this is my first time attempting to fix an amplifier and I can't figure out how to get the board out of the enclosure. I was trying to get the output terminals from the inside so I was taking the input board off but I can't get it back on. is there a way to do it without taking the entire board out?
I have a jl 1000/1 i brought it to a local shop and they said its running to hi voltage and i would have to send it to jl audio. It just blows subs if i run it, also the little caps inside get so hot their actually blowing outward, they said theirs to much voltage running through it. I am curious if i should just scrap it or pay to fix it if its a small issue
What kind of power supply do you use? Can u recommend one under 75 dollars?
Hi i have a jl 600 i don't know whats wrong with it but when u try and connect the the amp it sparks?
I accidentally had a 12v touch the ground on the rca and now there is no sound on any of the Channels on my 300/4. Do you think it could be a burned trace?
Hey man thanks for sharing the video. I have a 450/4 and I have a low ohms light channel 3 and 4 is working but 1 and 2 doesn't.
Would have an idea on what you think it is?
It's hard to say, but if I were to hazard a guess, probably shorted output transistors in those channels and 50/50 chance it damaged the driver modules.
Would it be possible for me to ship two JL amps to you for repair?
I have a 500/1 that comes on for like 10 to 15 seconds it plays the music and then shuts off. Im wondering if you will be willing to fix it and ill pay to ship it to tou
Was hoping you would turn the status display around. I pulled my wires out and need to know what color wire goes where to back of display LEDs.
Nope ive never had issues with the LEDs and their wires. Its all put back together now. But its not hard to figure out. Black is GND, Red is power, and then its the other 2 you have to figure out.
Hi, I have a JL 300/4 v1 amp and when I wiggle the power and ground cables beside the remote wire the red thermal light goes on and off. Any ideas why? Could the daughter board be loose? Sometimes when the thermal light is on the speakers distort badly
hi .good morning,iv got a question on a jl audio 300/4 amp whats the best way to take off the metal guard that holds the transister
You mean the spring clamps? there is a hole on top. Grab a stout allen key 90-degree wrench, and put it inside the whole, and pry towards you which wil put downward force on the spring. it will then pop off. Be careful, you can bend/shear the spring if you overdo it. to put them on, you need to tap it back into place until it bottoms out.
Was cleaning it and slipped
Pulled wires off of soldering, I can fix this easy if I knew where the wires went back.
Do you still repair amps?
Hi I’m just wondering if you’ve repaired a 300/4v2 with both no right channels working? Regards faz
I think I have a v2 in my stash that I need to finish repairing. the semiconductor shortage sidelined alot of this.
anyway i can send an amp over to you for repair has a low ohm light on 300/4 and maybe check a 500/1 make sure its up to par works fine at the moment ..
I have a jl 500 it turns on and light scratchy sound
I have a Slash 500/1 that is dropping volume once in a while . Still plays loud but doesnt hit hard . Someone mentioned to me that the amp has cards in it , which you just showed , and the plugins from the card cause this sometimes . Have you seen this ? He called these daughter cards . lol
"Doesnt hit hard" is a very vague and broad statement. Could be alot of things to internal faults all the way up to bad connections on the ground/power/speaker, loose/dirty switches on the crossover, etc.
I did all the cleaning . Pots , switches and the daughter board plug-ins. Then I stumbled on what I think it is . My ppi par225 . Either volume knob or op amps im thinking . I do have a question on setting the voltage on the speaker lines . I'm putting a par245 in now . So should all controls be flat on that to get the my 32 volt speaker output ? It did still hit but the bass would drop a little . When I pumped the eq volume I would get it back
My amp has the same problem but the power light is dim its not compleatly lid UP and the sound is weak like in the video did the same jumping wires and its still the same someone help??
i got a jl audio 500.1 v2 its weird as soon as u put power to it it turns on for ten secs then turns off?
can u please help?
I got the same problem
Hey brother you think you could help me out mine did the same shit yours did
Nice! I have a JL Audio G6600 that I can’t find a service manual for anywhere. Do you know where I can go to get it?
JL doesnt publish their schematics as far as I am aware.
@@THEtechknight I can’t even find a place to buy it. I searched up and down. I’m not great with a computer, so maybe I’m not searching right
@@kennyrmurray Not sure if you read what I posted. JL doesnt publish their stuff. Perry Babin over at DIYAudio would be the only one who knows.
@@THEtechknight yeah still nothing. That’s ridiculous!
I’m not buying their equipment anymore because of that! I like to fix my own stuff when I blow it
I have a jl audio300/4 the it needs to be repair I’ll pay you n ship it to you let me know thanks
Are you currently accepting repair work?
Not at the moment, no. Current ongoing semiconductor shortage, plus lack of free time.
Hi can anyone tell me JL a4300 amp Where is the fuse located?the amplifier does not light up when plugged in, so I wanted to check if it has an internal fuse.Thank you for all the information
I do not believe JL Audio amps have internal fuses. Its been awhile since i worked on that 4300.
@@THEtechknight Hi,,,that is, you can say that these are disposable devices, which when they break down, even the fuse cannot be checked, it is something similar to the iPhone, so it cannot be dismantled.😁😁😁😁
@@bradpitt3965 no? they are serviceable, you just gotta know what you are doing.
@@THEtechknight I understand, but this is only one of the few companies that makes its equipment only like the iPhone. Why don't most manufacturers do this when it is known that JL has such a policy. if it breaks, return it to the service without being able to check it yourself, Mtx, Hifonics, Alpine, Pioneer, etc. they don't do it. That's why I avoid this companyJL
@@THEtechknight even Boss, which doesn't have a super reputation for quality, has this type of protection and fuse..i don't blame you it's just my opinion i wanted to know more about this equipment but i just think it's highly overrated😆😆
I willing to pay if you could repair two jl audio amps bro.ill pay the shipping.I'm in Texas.
I have the jl amps that need repair can you contact me at coachk396@gmail.com
mr. D k