DIY LM1875 Gainclone Amplifier (Part 2) The Amplifier Casing

Continue from the first part of this Gainclone amplifier built, I can say that my previous amplifier built mostly using very thick aluminum casing. It is cosmetically better, non-magnetic material and feel really solid. But one thing should consider is the cost. The most expensive parts when building any audio project, especially like this Gainclone amplifier is the casing itself.

So, I am trying to cut some cost in this Gainclone amplifier project. I will not using the aluminum casing, instead I will using a commercial available steel casing. Using steel material for casing is far cheaper. The ground plane in steel casing for the amplifier is somehow can be better compares to the aluminum casing. So here is the amplifier casing that I will using in this project.

Most of the steel amplifier casing on the market right now are using thin metal sheet material. It feels far from solid. That is why I will reuse my old casing that intended for the pre-amplifier project. I bought this casing more than 15 years ago and the thickness is almost double compare to today casing.

First of all, I should tear down all components inside. It is a op-amp based pre-amplifier that I made a decade before. This pre-amp sound good enough, but for my today standard, I don't think I should keep this things up.

Finished remove all the internal components inside, then I clean up the casing.

I also installing the input-output terminals first before going to the next step which you can find on the part 3 here

Disclaimer: Any statement and photos in this article are not allowed to copy or publish without written permission from the writer. Any injury or loss from following tips in this article is not under writer responsibility.

Comments

OPA1622 Vs. OPA627 High Performance Op-amps Comparison

This op-amps comparison topic is actually boring, but at the same time, many of us still curious about what others think about it. The reason is simply because of the op-amps variation are hundreds and they are depends by the implementation. The op-amps are considerably cheap and an interchangeable electronic components but they are not built for the same function. So in this discussion, I will focus on the modern Vs. vintage high performance op-amps in the simple non-inverting pre-amplifier gain stage.

PCM56 R2R Non Oversampling DAC Built

From early this year, I am start to playing a lot with the multibit DAC. They are from Sony CDP TDA1541A here , Nakamichi DAC-101 dual TDA1541S1 here , Clarion DRX-9255EXL PCM1702 here and Clarion HX-D1 PCM1704 here . What I said playing with them is actually more suitable words because none of them are built by myself. I only study and exploring those unit then make some upgrade especially on the power supply components, signal capacitors upgrade, and bypassing the unused internal circuit for more clearer yet natural sound quality. This upgrade make a lot improvement compare to the first time I listen from it and I can really enjoy what the designer from each manufacture deliver the sound they would like to perform in those units. Those said units are categorized as a parts of hi-end audio system and I really now familiar with the sound signature from each of them. But to be honest, I am not satisfy yet with this condition. Because none of them is built by myself from ground up. ...

Vintage Multibit R2R DAC Tier List

At the very beginning of this year, I committed to explore the best multi-bit R2R DAC. This is simply because I have plenty of the resources (from broken old unit CD player of course) and ability to build them up. If you think this kind a recycle from old un-used unit to become something useful, than I should stated myself giving contribute for greener world:) After all DAC that I built in this year, I think it is better for me to list them up again in one single page like this. Then I will rank them up in a simple tier list. The reason for this, so you all know what my opinion about of those vintage multibit R2R DAC especially in the sound quality.

THE ORRONOCO AUDIO DIY

Search This Blog