HiFi Power amplifier Circuit (Hybrid )
Budget: $30 – $250 USD
I am currently building a variable power supply:
Voltage: 60-82vdc
Current: 20-40 amp
I need someone or team to develop the following audio amplifier circuit to pair with it…
Frequency Response: 1hz-180khz, +0db
Input sensitivity: 1v
Power: 1000w rms minimum @ 8ohms, where at the first 10-30watts the circuit is using the Class A architecture .
Gain: 45db (without clipping)
Impedance : 16ohm – 0.5ohm
.01% THD or less
Signal to noise ratio: 120db or better
Damping factor 350
Class-A Input:
Discrete Mosfet based circuit, with professional level fidelity, that is flat across the entire Frequency range.
Fidelity is very important, get this right before moving to next step.
Gain Stage:
Three stage Darlington circuitry to reduce distortion.
Class AB Output
Quad push pull amplification design on output stage. It must have a flat output Impendence across the entire audio band.
Take all steps needed to ensure switching is undetectable electronically when compared to the Class A Stage.
(If you are capable of converting the output stage to a Class D, with the same quad amplification design I would prefer it)
Protection:
Have the required protection form noise and protection for output . (Noise suppressor for power supply input etc )
This should also have: clipping indicator, output level indicator, blown fuse indicator.
Additional features:
Allowance for an increase in voltage from base of 60vdc to 82vdc (circuit should able to handle the increase and simply increase its out wattage in response.)
Please make your best attempt to separate hot components from the rest of the main board if a passive board level heat sink will not be enough to cool it.
Your PCB layout should be 6 layers or higher with oversized pathways, coming as close as the board will allow to “point to point" connections.
This project will take time, so I’m not going to be moved by sweet talk of a 3day delivery time… What would give you the edge is being able to do this with a Class D Output Stage hitting or exceeding all the other goals .
If your design is impressive you will be asked to do 3 variations, (changing only the input power and output in watts)
Voltage: 60-82vdc
Current: 20-40 amp
I need someone or team to develop the following audio amplifier circuit to pair with it…
Frequency Response: 1hz-180khz, +0db
Input sensitivity: 1v
Power: 1000w rms minimum @ 8ohms, where at the first 10-30watts the circuit is using the Class A architecture .
Gain: 45db (without clipping)
Impedance : 16ohm – 0.5ohm
.01% THD or less
Signal to noise ratio: 120db or better
Damping factor 350
Class-A Input:
Discrete Mosfet based circuit, with professional level fidelity, that is flat across the entire Frequency range.
Fidelity is very important, get this right before moving to next step.
Gain Stage:
Three stage Darlington circuitry to reduce distortion.
Class AB Output
Quad push pull amplification design on output stage. It must have a flat output Impendence across the entire audio band.
Take all steps needed to ensure switching is undetectable electronically when compared to the Class A Stage.
(If you are capable of converting the output stage to a Class D, with the same quad amplification design I would prefer it)
Protection:
Have the required protection form noise and protection for output . (Noise suppressor for power supply input etc )
This should also have: clipping indicator, output level indicator, blown fuse indicator.
Additional features:
Allowance for an increase in voltage from base of 60vdc to 82vdc (circuit should able to handle the increase and simply increase its out wattage in response.)
Please make your best attempt to separate hot components from the rest of the main board if a passive board level heat sink will not be enough to cool it.
Your PCB layout should be 6 layers or higher with oversized pathways, coming as close as the board will allow to “point to point" connections.
This project will take time, so I’m not going to be moved by sweet talk of a 3day delivery time… What would give you the edge is being able to do this with a Class D Output Stage hitting or exceeding all the other goals .
If your design is impressive you will be asked to do 3 variations, (changing only the input power and output in watts)