Fosgate

Oh and if u want to wire ur subs to 1 channel than that's what class d amps r 4

Originally posted by rickster6924



Originally posted by Russ-D



Originally posted by rickster6924



Just about any 2 channel amp u hook up at 2ohms bridge will shut off because their only stable at 4ohms bridge or 2ohms per channel!!!!!!!



again, thats what made the old fosgate so bad ass. Just about every older fosgate and anything made by zed or US made before 1996 (lanzar, rodek, crunch, orion etc)would handle 2 ohm mono easy, some competition models even handled 1/2 ohm mono.

Old rockford > just about anything made in the last 10 years. I feel sorry for you guys who got into stereo since then, you have NO I D E A what you missed.



It doesn't matter if the amp was made 10 years ago or not if u want to hook ur subs up at 2ohms than use dual 4ohm subs and wire them at 2ohms per channel



you are wrong. I installed from 1988 to 2000. New stuff is junk. Old stuff rules. Look up some prices on ebay, find a HiFonics Zues, and comare that 15 yr old amps asking price to ANY 600 watt amp made currently. The new ones will cost half to a third as much as the 15 yr old amp. It aint nostalgia making that price so high.

Originally posted by rickster6924



Oh and if u want to wire ur subs to 1 channel than that's what class d amps r 4

I doubt you even know the first thing about electronics. Class D is the transistor used, it is about 68% distortion at higher frequencies, which is why they only make them as sub amps. It has nothing to do with them being mono amps, in fact most Class A and Class AB stereo amps are converted mono amplifiers, with one phase inverted to become the second positive channel.

Ohm load has little to do with what the amp is "supposed to have", halving the ohm load doubles the current, which theoretically doubles the power. Thats Ohm's Law. The reason amps made today cant handle it is because they are cheaply made with class D transistors. The lower the ohm load, the hotter the transistors get, the hotter they get the more current they pass, and so on until the amp is dead. With MOSFET transistors, the oposite occurs, leading to current limiting and safer operation.

Check my stas man, I was an installer for 12 years and I am an electrical engineer. I'm not picking on you, it's ok to be wrong, as long as you dont insist you are right.

OLD > NEW. Even old sherwoods outperform some of this new junk.

oh and class d amps are so you can have a realtively high output power with a relatively low input current. Its so you dont have to buy bigger batteries, bigger alternators, and stiffening caps to get "1000 watts" in your car. The old amps are current hogs, that is the drawback.

mosfet is a type of transistor, class d and class ab is the operation. True.

But the class of the amp does determine what transistor you use. You can use trasistors in class d that are not MOSFET, and you can turn a class A amp into a class D by changinig the rest of the amplifier. However, you cannot change a class D into a class A or AB very easily, because the transistors are not make to carry that type of current load, and would again be mostly distortion at higher frequencies.

You can use wikipedia for your arguments, but it still doesnt make you understand what you are saying. You should quote your source, but remember wikipedia is a contributary encyclopedia, not fact.

They handle lower impedences based on what I said above, that the CURRENT requirement goes up as the impedence goes down. So you are saying exactly what I did, that the more efficient design makes the class D more suited to lower impedence. But it doesnt make it better, only more efficent at lower frequencies.

Take some classes. Its easy I promise, if I can do it anyone can.

well I still have all my old rockford from back in the day, I have a power 300 and 650, oeq1(chrome), and xv-1(chrome)
I lost my pa1 preamp but I am still searching for another one
this stuff was built like a tank, take a lot of abuse, required alot of juice but worth it and had a killer appearance
I also still have those huge soft dome tweeters for the dash

Fosgates are good subs,however, I started with two 12" JL Audio W-0. When those finally gave out I went and ivested in two P1's.... They have nothing on my W-0's... Those JL's were sick!

Originally posted by Russ-D



mosfet is a type of transistor, class d and class ab is the operation. True.

But the class of the amp does determine what transistor you use. You can use trasistors in class d that are not MOSFET, and you can turn a class A amp into a class D by changinig the rest of the amplifier. However, you cannot change a class D into a class A or AB very easily, because the transistors are not make to carry that type of current load, and would again be mostly distortion at higher frequencies.

You can use wikipedia for your arguments, but it still doesnt make you understand what you are saying. You should quote your source, but remember wikipedia is a contributary encyclopedia, not fact.

They handle lower impedences based on what I said above, that the CURRENT requirement goes up as the impedence goes down. So you are saying exactly what I did, that the more efficient design makes the class D more suited to lower impedence. But it doesnt make it better, only more efficent at lower frequencies.

Take some classes. Its easy I promise, if I can do it anyone can.

Im glad theres people in here who actually know what they are talking about...