TDA1514/TDA2040 Surround Sound Amplifier - Mark 3 - Surround Sound Amplifier 2020 Remake

Part 5 - Results and Pictures

On this page...

Gutting the previous build

Originally I was only going to change the preamp and add digital control to the existing amplifier, but after tearing it down and feeling a bit displeased with the state of it, I decided that the improvements would go much further!

Before teardown
Above: Last picture of the amplifier before its teardown!

Before teardown, inside
Above: Inside picture of the amplifier before its teardown

Front panel removed
Above: Front panel removed

Completely empty
Above: Completely empty

TDA1514 board
Above: TDA1514 board - I'll be adjusting and reusing this

TDA2040 board
Above: TDA2040 board - originally aiming to reuse, but replaced

New and refurbished boards

Below are a few pictures of the new PCBs I built

Preamp board before components
Above: Preamp board before components added

Preamp board before components
Above: Preamp board after components added

Preamp board regulator
Above: Preamp board showing voltage regulators and motorised volume control potentiometer

Surround processor board
Above: Surround processor board

Power supply capacitors
Above: Power supply capacitors

Capacitors board underside
Above: Capacitors board underside

Mains input and switching board
Above: Mains input and switching board

Mains input and switching board underside with lacquer
Above: Mains input and switching board underside with lacquer

LED and IR sensor board before components
Above: LED and IR sensor board before components

LED and IR sensor board after components
Above: LED and IR sensor board after components

LED and IR sensor board after components, back side
Above: LED and IR sensor board after components, back side

TDA2040 board before components
Above: TDA2040 board before components

TDA2040 board before components
Above: TDA2040 board after components and wires

Building and results

Some pictures of the build and overall pictures of the completed amplifier.

TDA1514 and TDA2040 boards on heatsink
Above: TDA1514 and TDA2040 boards mounted to the heatsink

TDA1514 mounted in the case
Above: TDA1514 mounted in the case. I used a square corner of chipboard to reinforce the mounting of the board to the heatsink

Rear of amplifier
Above: Rear of amplifier - basically as it was before!

Above: Top/front view with cover off
Above: Top/front view with cover off

Rear of amplifier
Above: Mains connectors and board. All connections made with spade terminals now instead of soldered. The 80VA transformer is below.

Transformers
Above: The toroidal transformers. Left is the 80VA 18V one, right is the 60VA 12V one

LED/IR sensor board
Above: LED/IR sensor board mounted to the front of the case. The stripboard shown middle right is for the rotary encoder. On the left is the voltage regulators for the preamp

Mounted preamp board
Above: Preamp board in place, showing many wires connected to it!

Speaker terminals, muting relay
Above: Speaker terminals speaker muting relay and input connectors

Bluetooth board
Above: Bluetooth board with L bracket to mount it vertically. The green relay switches on/off the power to this board.

Amplifier front, with labels
Above: Amplifier front, with labels.

Top down, cover off
Above: Top down view with cover off.

Completed view, in place
Above: Completed view, in place. I know it's not ideal placement of speakers, but they still sound pretty good there for the bedroom!

Overall, I'm happy with the rebuild. The white sticky back plastic gives it a refreshed look, but most importantly the improvements in the electronics give it remote control, improved safety and it still sounds really great! Here;s hoping it stays with me and works for the next 18 years and beyond!