1000W Simple PA Amplifier

[totski]

Protect pcb...

sir mile can i use 24v relay instead 12v relay if possible what part should i change?

 

[totski]

Protect Files...

sir miles and wil can i use 24v relay instead 12v relay if possible which parts should i change?

 

[amptech]

Total agree there as it's just nuts wasting lots of money to build it. I mean if that thing goes wrong bang flash pop you get a big pile of burnt parts!!

This is in relation to the circuit of the 1000w amp pointed out at the start..

 

[TonyTecson]

what this amp needs is a good SOA protection circuit...use a series lamp tester, it saves a lot of grief..

 

[stewin]

what this amp needs is a good SOA protection circuit...use a series lamp tester, it saves a lot of grief..

very true

 

[rhythmsandy]

BA1000 Input include: Balanced Input, 30Hz Low Cut Filter, Limiter and Volume Control,
Regards

any drawbacks of this circuit?

 

[wattaniya]

hi apex sir,
i made this ba 1000,
i have 36vdc power supply,
can this work with 36vdc,
any changes in the parts.

 

[globalplayer]

If you use an IRS2092 class d based design with gate drivers you can get 1000watts out of 4 output transistors.

Any schematic?

 

[apexaudio]

BA1200

 

[apexaudio]

BA1200 in action
YouTube

 

[sumeshak]

Heat on !)k/5W

HI built this soft start and is working correctly.
The 10K/5W resistor gets hot.
Is it normal?

Thanks and regrds,
Sumesh

I share many soft-start circuits.

 

[apexaudio]

HI built this soft start and is working correctly.
The 10K/5W resistor gets hot.
Is it normal?

Thanks and regrds,
Sumesh

Yes it is normal.
Regards

 

[makus ele]

Thanks for posting and comment.
Protection circuit is on separate PCB, balanced input with limiter circuit also.

Regards

please can you direct me to where i can find the protection circuit and the balance input

 

[Gurpreet Turna]

How many minimum output transistor pairs use on board

 

[escorpion12345]

Funciona? alguien lo armo?

 

[Mooly]

English only please.

Works? Someone I arm

(no idea 🙂)

 

[SAMCPI]

Setting bias is easy, just adjust about 15 mV on 1R/5W resistors and that is 15mA per output pair or 135mA total.

hi mr. mile and all
Therefore, the voltages on both sides of the 1 ohm resistor should be 135 mV (for 9 pairs of transistors) ...
Is this correct?
Should the input be connected to the ground to adjust the bias?
Thanks

An externally hosted image should be here but it was not working when we last tested it.

 

[Lakota Wanagijata]

I Have a qestion also for speaker protection.
is this protection any good for ba1000 amplifier.
im gonna use 80amp auto relay .
can somebody will explain to me ,this 10ohm resistor is in the series with speaker
whether or not the speaker impedance will be it 10ohms more.
for example 4ohm speaker with this 10ohm resistor will had 14 ohm or this resistor
dont have influence on speaker.


And one more question can somebody have connection diagram for bridging this amplifier from 2 channel in 1 bridge channel.
thanks in advance!

An externally hosted image should be here but it was not working when we last tested it.

 

[44250]

if you are going to use auto - car 12Vdc relay that is going to be a problem due to short distance between relay contacts. it will not be able to make safe contacts opening. as Rolling Stones would sing "Sparks will fly" and contacts would ended welded and speaker protection would miss it's purpose.

 

[Lakota Wanagijata]

if you are going to use auto - car 12Vdc relay that is going to be a problem due to short distance between relay contacts. it will not be able to make safe contacts opening. as Rolling Stones would sing "Sparks will fly" and contacts would ended welded and speaker protection would miss it's purpose.

What sort of relay you recommend for speaker protection?
thanks for reply.