Well I'd bench tested my amp1b a year ago but put it on the shelf for various reasons. Here's a couple of images:
As you might notice, it's built into two computer PSU boxes which are screwed together. My toroidal is on the left (the box with its lid on) - you might be able to see the toroidal I used. This was a 23-0-23 (used for rails), 12-0-12 (cooling fan and power light), 0-9 (5v supply). The 23-0-23 is a tad high so I used a diode chain to reduce the rectified voltage to about 30v (seen at back of case mounted on cooling fan). The cooling fan is the original computer PSU one which I probably don't need but it's there anyway - I physically reversed it so that it blows at the amp (better IMO). The amp chip is screwed to a simple heat sink which is screwed to the casing. As the toroidal has three separate windings then the 5v and rail voltages are separetly rectified. The inputs and outputs are via 6.3mm jacks and the input has a dual gang pot to control input level. Hope this is of some use to someone. I'll attempt to contribute to the forum more than I have been lately. Regards.