This section describe some changes on reputable amplifiers.
In any cases, amplifiers (even if they are reputable) suffer from some deficiencies witch seem to be acceptable à first, but alterate the quality and/or confort during pratical use.
First step is define what you wish. Starting from your needs, we can assess at least one or more technical solutions. If feasability is confirmed, then we estimate the costs.
If both technical solution and cost suits you, all arrangements of "on command sale" process are applied (see "sale conditions"), to which one must add shipment of the materials to be modified.
Every amendment begin with a full maintenance operation. After receipt of the material, first step is to evaluate its state and maintenance needed. That is the key to conduct the project with clarity, rigour and precision. This step is also a good solution for raise the doubt about a real amendment needed or just a maintenance needed.