500 Watts RMS in 4 Ohm amplifier

[GABRIELITEDEVIL]

Hello Audio Gurus

I want to build a 500 Watts Rms Amplifier for my home theater system in about 4 Weeks.So I request you people to find me a Circuit that has a good balance of power and ease in building it ,PCB availability would be a PLUS.

Thank your for Help in Advance.

 

[44250]

500w in total or per chanel?

 

[AndrewT]

Change that to 4months and you have some hope of researching your target brief in the time scale.

 

[GABRIELITEDEVIL]

@44250
500 Watts mono Block Amplifier(Single channel in 500 Watts)

 

[44250]

APEX B500? Holton HV700?

 

[GABRIELITEDEVIL]

Apex B500!

 

[vzaichenko]

Is it going to be used for a sub channel?
Otherwise, I can only imagine watching the movie at a medium size stadium

 

[GABRIELITEDEVIL]

@vzaichenko
You are right,I am going to use this for Sub Woofer.
planing to build a cinematic theater with 4 subs in total. ��

 

[CBS240]

class D ?

 

[GABRIELITEDEVIL]

class AB is a good amp I hope over Class D in cas of Diy.

 

[ostripper]

Apex B500 or ... slewmaster MT-200 BJT

(below) is a good 250+ /8R and 500W @ 4R with 70V rails ( 500VA trafo/40kuf).
Plenty of SOA with 3 -pair Sanken MT-200. I only have a 400VA - 60Vdc rail power supply , so only 200W
for my 8R woofer.
BJT can do it (you don't always need D) .

OS

 

[andrewlebon]

Nice Build Ostripper

 

[ostripper]

Thanks , MT-200's were sort of made for "grunt" - 6+ A SOA @ 60V.
Besides Semelab's "special BJT's" , they are the only choice for
any 2-4R loads (Sub's). Very low beta .... only good with EF3's. Single pair mt-200
classic Japanese amps are often rated 100-125W units. Multiple pair needs TO-3P
drivers.

Edit - 3 pair (18A) blow away even 5 pair ON TO-3p/264 - @ 10+ A (100ms).

OS

 

[GABRIELITEDEVIL]

@ostripper
Its a beauty.
Could you share its pcb and schematics.

 

[ostripper]

@ostripper
Its a beauty.
Could you share its pcb and schematics.

Just updated the first post - 10 input stages that you can hook to 3 output
stages (modular).

Link - http://www.diyaudio.com/forums/solid-state/248105-slewmaster-cfa-vs-vfa-rumble.html#post3753356

Post # contains schema / toner artwork ...

OS

 

[ATAUDIO]

Thanks , MT-200's were sort of made for "grunt" - 6+ A SOA @ 60V.
Besides Semelab's "special BJT's" , they are the only choice for
any 2-4R loads (Sub's).

OS

Hi OS! Why do you say only choice?
I am going from a lot of time with 5 pairs TO3 (metal cans) Motorola/ONsemi 15003/15004. 10 Pairs for 2 Ohm.
Never had a trouble, PA use as well. While I like the MT200 as well, I do not think they are only choice.

 

[ostripper]

Hi OS! Why do you say only choice?
I am going from a lot of time with 5 pairs TO3 (metal cans) Motorola/ONsemi 15003/15004. 10 Pairs for 2 Ohm.
Never had a trouble, PA use as well. While I like the MT200 as well, I do not think they are only choice.

"Only CHEAP choice" ... MJ15xxx are SLOW as dogpoo (2mhz)
I guess for a subamp - OK ? harder to source than plastic packages.
Mt- 200's are 35mhz fT.

OS

 

[GABRIELITEDEVIL]

@Apex
I finally Desired to go with Apex B500 Amplifier,as it seems a good variant for DIY .

 

[ostripper]

@Apex
I finally Desired to go with Apex B500 Amplifier,as it seems a good variant for DIY .

Go ahead and build it .... but 4 pair with a EF2 is hardly 500w . The forum amp ,
(badger) is exactly the same minus 1 pair - rated at 150 -8R /250 - 4R .

OS

 

[GABRIELITEDEVIL]

If you could Provide a PCB of your Amp It world be a good start for me,Because your amplifier seems nice.
And What about the Apex B500,It doesn't supplies 500 Watts Rms?