The “Big Brother” Power Amplifier "Pinnacle AB700"

[liverpool_for_life]

I know the Basic Principles, I have skills and I know what I want hence I followed the DIY way.

Fair enough. I could care less for brands, myself. Which was why I was curious about your design intent. That, and the fact that I am in (what I consider to be an unfortunate) situation of having to purchase an amplifier for my upcoming Atmos speakers.

I disagree with your position re. all amplifiers coloring the sound, but I do respect your efforts. Peace.

 

[sadik]

I disagree with your position re. all amplifiers coloring the sound, but I do respect your efforts. Peace.

You have the right to disagree. We all have different taste, different views and understanding. I respect your view too. I dont want to dig this argument further. Peace.

 

[Aniket]

Just for my knowledge can the audio boards be bridged internally to be a mono amp ?

@Aniket @sachu888

hello Rikhav,

yes the amp boards can be used in bridge mode, you will need a bridging circuit to do so.

 

[Bloom@83]

Even if In short bursts, that's massive

Truly.

 

[Vinay103]

Hi Friends,

I am sharing my new Amplifier built with you all. Its been more than 6 to 8 months since I started this project. I have named it “Pinnacle AB700”. “AB” itself suggest its a Class AB Amplifier. I am calling it as a “Big Brother” because i had just recently made a Amplifier "Pinnacle AB200". It was rated for 250 watts RMS power @ 4 Ohms. My Amplifier is rated for 500 Watts Power @ 4 Ohms, hence i am calling this Amplifier as “Big Brother”

It can be used as a HI-FI amplifier for home use or a PA application. The Power Supply has 50-0-50 VAC @ 1200 VA rating transformer, supported with a massive power bank of total capacitance 1,20,000uf. It has total 7 Pairs of Transistors for Each Channel.

Note: With 90 Volts DC supply per rail this Amplifier is capable of delivering 700 Watts RMS power @ 4 Ohms. Hence the suffix "AB700"

Below are the specifications of same with 70 Volts DC Supply per rail
Power Output.
260W @ 8 Ohms (Per Channel)
500W @ 4 Ohms (Per Channel)
850W @ 2 Ohms (Per Channel) without any difficulty.
Frequency Response : 7Hz - 150 kHz (-3dB)
Thd : <0.05% at rated power. 20 - 20000Hz
Thd : <0.006% @ 100W, 1 kHz
Sensitivity: 1.44V rms for rated power.
Slew Rate: 95V/us
Damping Factor: >600 @ 8 Ohms (20-200 Hz)
SNR: 117 dB

A little information on built.
The Amplifier modules, Pre Amp / Buffer module as well as soft start module duly soldered and assembled on Heatsink were directly purchased from @Aniket , Soft Start module was purchased form theaudiocrafts and the fan speed controller (low speed low noise of air) was purchased from e-Bay India. I had made the Enclosure and Face-Plate (Brushed Aluminium Finish) locally. The Enclosure was designed in 3D software, the Profile was cutted on laser cutting machine and bending was done on CNC bending machine.

First Power On.
I was a bit afraid about humming issue, being such a high power amplifier with a huge EI transformer there was 99% possibility of humming noise from speakers. But then it was a surprise The Amplifier was dead silent on startup. Credit goes to @Aniket. The sound signature was superb, It was just like the Pinnacle AB200, the only difference was the Power, A High Power Amplifier with such a sweet tonal character, really impressive. to own a Branded one with such a power and tonal character may leave you with a BIG hole in your Pocket. Enough of typing now. Enjoy the Built.

The Wiring layout. Thanks to @Aniket for his guidance, The layout played a very important role to achived a dead silent amplifier.

Face Plate Aluminum treated for brush finish (There is a little defect on the first slot which can be seen in the below photo) It states you cannot have control on all errors. This was a machine error. The Plate was also cutted on CNC Laser Cutting Machine.

A rough Fitment.

Face- Plate after Silver Anodizing & Laser Engraving.

A Closeup

Final Assembly

 

[Vinay103]

Hi Friends,

I am sharing my new Amplifier built with you all. Its been more than 6 to 8 months since I started this project. I have named it “Pinnacle AB700”. “AB” itself suggest its a Class AB Amplifier. I am calling it as a “Big Brother” because i had just recently made a Amplifier "Pinnacle AB200". It was rated for 250 watts RMS power @ 4 Ohms. My Amplifier is rated for 500 Watts Power @ 4 Ohms, hence i am calling this Amplifier as “Big Brother”

It can be used as a HI-FI amplifier for home use or a PA application. The Power Supply has 50-0-50 VAC @ 1200 VA rating transformer, supported with a massive power bank of total capacitance 1,20,000uf. It has total 7 Pairs of Transistors for Each Channel.

Note: With 90 Volts DC supply per rail this Amplifier is capable of delivering 700 Watts RMS power @ 4 Ohms. Hence the suffix "AB700"

Below are the specifications of same with 70 Volts DC Supply per rail
Power Output.
260W @ 8 Ohms (Per Channel)
500W @ 4 Ohms (Per Channel)
850W @ 2 Ohms (Per Channel) without any difficulty.
Frequency Response : 7Hz - 150 kHz (-3dB)
Thd : <0.05% at rated power. 20 - 20000Hz
Thd : <0.006% @ 100W, 1 kHz
Sensitivity: 1.44V rms for rated power.
Slew Rate: 95V/us
Damping Factor: >600 @ 8 Ohms (20-200 Hz)
SNR: 117 dB

A little information on built.
The Amplifier modules, Pre Amp / Buffer module as well as soft start module duly soldered and assembled on Heatsink were directly purchased from @Aniket , Soft Start module was purchased form theaudiocrafts and the fan speed controller (low speed low noise of air) was purchased from e-Bay India. I had made the Enclosure and Face-Plate (Brushed Aluminium Finish) locally. The Enclosure was designed in 3D software, the Profile was cutted on laser cutting machine and bending was done on CNC bending machine.

First Power On.
I was a bit afraid about humming issue, being such a high power amplifier with a huge EI transformer there was 99% possibility of humming noise from speakers. But then it was a surprise The Amplifier was dead silent on startup. Credit goes to @Aniket. The sound signature was superb, It was just like the Pinnacle AB200, the only difference was the Power, A High Power Amplifier with such a sweet tonal character, really impressive. to own a Branded one with such a power and tonal character may leave you with a BIG hole in your Pocket. Enough of typing now. Enjoy the Built.

The Wiring layout. Thanks to @Aniket for his guidance, The layout played a very important role to achived a dead silent amplifier.

Face Plate Aluminum treated for brush finish (There is a little defect on the first slot which can be seen in the below photo) It states you cannot have control on all errors. This was a machine error. The Plate was also cutted on CNC Laser Cutting Machine.

A rough Fitment.

Face- Plate after Silver Anodizing & Laser Engraving.

A Closeup

Final Assembly

Sadik

Is amplifier

Hi Friends,

I am sharing my new Amplifier built with you all. Its been more than 6 to 8 months since I started this project. I have named it “Pinnacle AB700”. “AB” itself suggest its a Class AB Amplifier. I am calling it as a “Big Brother” because i had just recently made a Amplifier "Pinnacle AB200". It was rated for 250 watts RMS power @ 4 Ohms. My Amplifier is rated for 500 Watts Power @ 4 Ohms, hence i am calling this Amplifier as “Big Brother”

It can be used as a HI-FI amplifier for home use or a PA application. The Power Supply has 50-0-50 VAC @ 1200 VA rating transformer, supported with a massive power bank of total capacitance 1,20,000uf. It has total 7 Pairs of Transistors for Each Channel.

Note: With 90 Volts DC supply per rail this Amplifier is capable of delivering 700 Watts RMS power @ 4 Ohms. Hence the suffix "AB700"

Below are the specifications of same with 70 Volts DC Supply per rail
Power Output.
260W @ 8 Ohms (Per Channel)
500W @ 4 Ohms (Per Channel)
850W @ 2 Ohms (Per Channel) without any difficulty.
Frequency Response : 7Hz - 150 kHz (-3dB)
Thd : <0.05% at rated power. 20 - 20000Hz
Thd : <0.006% @ 100W, 1 kHz
Sensitivity: 1.44V rms for rated power.
Slew Rate: 95V/us
Damping Factor: >600 @ 8 Ohms (20-200 Hz)
SNR: 117 dB

A little information on built.
The Amplifier modules, Pre Amp / Buffer module as well as soft start module duly soldered and assembled on Heatsink were directly purchased from @Aniket , Soft Start module was purchased form theaudiocrafts and the fan speed controller (low speed low noise of air) was purchased from e-Bay India. I had made the Enclosure and Face-Plate (Brushed Aluminium Finish) locally. The Enclosure was designed in 3D software, the Profile was cutted on laser cutting machine and bending was done on CNC bending machine.

First Power On.
I was a bit afraid about humming issue, being such a high power amplifier with a huge EI transformer there was 99% possibility of humming noise from speakers. But then it was a surprise The Amplifier was dead silent on startup. Credit goes to @Aniket. The sound signature was superb, It was just like the Pinnacle AB200, the only difference was the Power, A High Power Amplifier with such a sweet tonal character, really impressive. to own a Branded one with such a power and tonal character may leave you with a BIG hole in your Pocket. Enough of typing now. Enjoy the Built.

The Wiring layout. Thanks to @Aniket for his guidance, The layout played a very important role to achived a dead silent amplifier.

Face Plate Aluminum treated for brush finish (There is a little defect on the first slot which can be seen in the below photo) It states you cannot have control on all errors. This was a machine error. The Plate was also cutted on CNC Laser Cutting Machine.

A rough Fitment.

Face- Plate after Silver Anodizing & Laser Engraving.

A Closeup

Final Assembly

Sadik

Specifications looks superb!!
How would you compare the performance and sound quality with branded amplifier Yamaha/Rotel/Arcam available in indian market...I m also looking a amplifier which may be ideal for bollywood music with digital sources. I tried Norge handmade ampl assembled by Lakshman but doesn't impressed much.