So I know this question may be more generic then it should be, and this question overly long cuz it’s early and I got mad coffee in me lol, but I’ve been coming across this transistor combo a lot lately on “older” (2005-ish) monoblock amps. I’ve noticed almost every one does NOT have matching fets btw, which is something I learned early on is a MUST for a properly and cleanly functioning amp, so I’m considering switching them out on my fav stuff, especially my Orion 2500D.
I know there’s the “don’t fix it if it ain’t broke” but I’ve also noticed a lot of the Fet, ground, etc joints are just not done very well on my Orion and some even almost non existent (mass produced back in the day so it’s gona happen) so I’m going in and redoing them anyway, so I was wondering what is considered the “best” of these 2 transistors? Does this amp play any role in choosing what’s considered “best”? Is price a good indicator like it usually is? What makes a fet better then others within this make/model?
IRF3205
IRF9640
These 2 Fets are used on my Orion 2500D (while Directed owned Orion, not Orion’s best stretch of amps but they still hold their own) and the mosfets are just all mismatched everywhere, solder joints random as all hell with some looking like they were totally skipped over, etc. besides the physical sloppiness of the solder joints there was barely any anti-vib silicon as well. The amp also makes a high pitched “whine” that doesn’t seem to oscillate, just stays steady regardless of settings, gain, etc. still need to figure that out but hoping this helps. Any other fets on this amp that “could be better”?
So I’m thinking I’m going to replace all fets with matched sets, redo all solder joints that need it, etc. and just overall cleanup the sloppiness, reinforce the quality, etc. I really like this amp, it’s my first Orion piece since I’ve made the decision to switch from Alpine X so I’ll prolly have it for forever, and I’m a modder at heart so ya, seems only natural to make sure it’s functioning as good as it can, and hopefully even “fix” that slight high pitched whine problem. It has zero problems other then what’s listed, that I know of. I haven’t pushed it yet.
I’ll be updating my other post on noise issue with sound clip before amp “fix”, but ya I’d really like to know what’s the best IRF3205 & IRF9640 money can buy and why? When I needed IRF3205 for my Kicker 06zx750.1 power supply repair I wasn’t told anything specific, just “get IRF3205” which I randomly picked out and bought, but I’m assuming there’s better specs for this Mosfet right? As well as for the IRF9640 ...so spill some beans my OG Master Jedi Amp Repairerz and bless this Padawan with your knowledge 🙂
I know there’s the “don’t fix it if it ain’t broke” but I’ve also noticed a lot of the Fet, ground, etc joints are just not done very well on my Orion and some even almost non existent (mass produced back in the day so it’s gona happen) so I’m going in and redoing them anyway, so I was wondering what is considered the “best” of these 2 transistors? Does this amp play any role in choosing what’s considered “best”? Is price a good indicator like it usually is? What makes a fet better then others within this make/model?
IRF3205
IRF9640
These 2 Fets are used on my Orion 2500D (while Directed owned Orion, not Orion’s best stretch of amps but they still hold their own) and the mosfets are just all mismatched everywhere, solder joints random as all hell with some looking like they were totally skipped over, etc. besides the physical sloppiness of the solder joints there was barely any anti-vib silicon as well. The amp also makes a high pitched “whine” that doesn’t seem to oscillate, just stays steady regardless of settings, gain, etc. still need to figure that out but hoping this helps. Any other fets on this amp that “could be better”?
So I’m thinking I’m going to replace all fets with matched sets, redo all solder joints that need it, etc. and just overall cleanup the sloppiness, reinforce the quality, etc. I really like this amp, it’s my first Orion piece since I’ve made the decision to switch from Alpine X so I’ll prolly have it for forever, and I’m a modder at heart so ya, seems only natural to make sure it’s functioning as good as it can, and hopefully even “fix” that slight high pitched whine problem. It has zero problems other then what’s listed, that I know of. I haven’t pushed it yet.
I’ll be updating my other post on noise issue with sound clip before amp “fix”, but ya I’d really like to know what’s the best IRF3205 & IRF9640 money can buy and why? When I needed IRF3205 for my Kicker 06zx750.1 power supply repair I wasn’t told anything specific, just “get IRF3205” which I randomly picked out and bought, but I’m assuming there’s better specs for this Mosfet right? As well as for the IRF9640 ...so spill some beans my OG Master Jedi Amp Repairerz and bless this Padawan with your knowledge 🙂
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You read too many Forums.
You are wasting your time.
You will not outsmart the original designers.
HOW do you know your Fets are mismatched?
A better design is NOT the same old tired one but with "better parts"
You are wasting your time.
You will not outsmart the original designers.
HOW do you know your Fets are mismatched?
A better design is NOT the same old tired one but with "better parts"
Nonsense/meaningless/wrong assumptions questions, and not the only one.
Wow dude, if you don’t have any meaningful reply then just don’t reply, like seriously who hurt you that much that you need to go around and try shitting on someone’s post that’s trying to learn ...I’ve looked over multiple data sheets and yes, they have diff specs, so I’m trying to learn what makes what and why ...ppl like you are infecting everything, making it all toxic, and you are a prime example. Ppl like you will not dissuade me from learning, actually the opposite.
And it’s easy to see mismatched transistors ...like just wtf lol.
Edit: No one is trying to redesign anything, you obviously missed the reason for the post and / or didn’t even read it completely
...just wow, lol 🥴😅🤣
And it’s easy to see mismatched transistors ...like just wtf lol.
Edit: No one is trying to redesign anything, you obviously missed the reason for the post and / or didn’t even read it completely
...just wow, lol 🥴😅🤣
Is that amp a Class D amp? Just asking because this post is in the class D section. Please don't bite my head off for asking a simple question.
Bite your head off?
Are you saying that cuz of my reply to the toxic af reply I received to my post? ...lol.
And yes it is a class D amp, hence why it is posted in this section.
I am finding some of you are not very friendly or inviting to new people self teaching wanting to learn ...shame really, it’s whatever though, it’s everywhere now :/
Sorry you feel that way, the insides of your amp resemble the insides of my old school Orion sx250 which is not class D.
should have just looked it up myself. My bad, good luck with your project.
should have just looked it up myself. My bad, good luck with your project.
Sorry, we not talking about Class AB,
to be honest, wrong questions, and not the only one
You need to learn the basics of Classs D
Been thinking about this thread. While I agree with JMFahey, we need to remember that DIYA is full of people wasting time and money on all kinds of silliness, and they have every right to do so. They are not looking for tough love. Some make good money selling their silliness. I have made the mistake of too much honesty before, and we will no doubt do it again. Best to see the humor and don't become sinical.
