If we assume that "the amp needs cap replacement" as you say, then you can try doing it yourself. If you screw it up, then you will probably have to send it in to some electronics shop for them to fix it, which might not cost much more than having them replace the caps in the first place.
But you might have to pay more for the caps as a "retail" customer, versus a fixit shop or the manufacturer who could get some kind of discount.
Be sure you look at how the caps are fastened and fitted into the chassis. Often the manufacturer might have some custom version of the caps with a special size/shape or special flanges, screw holes, etc. An off-the-shelf part with the correct electrical values might not work out.
Good luck.
But you might have to pay more for the caps as a "retail" customer, versus a fixit shop or the manufacturer who could get some kind of discount.
Be sure you look at how the caps are fastened and fitted into the chassis. Often the manufacturer might have some custom version of the caps with a special size/shape or special flanges, screw holes, etc. An off-the-shelf part with the correct electrical values might not work out.
Good luck.