Yes, let me know about your other test with a different source.
With regards to the Rega, I have a couple of thoughts that centre around the arm - 1 good, 1 bad. First the bad - To properly mount a cartridge, the arm MUST be removed. The proper amount of torque required to secure the cartridge can damage the bearings if the arm is left mounted, and a cartridge is mounted. This is a very delicate area of the table. Find out how they mounted the cartridge, arm on the table, or did they remove the arm.
If they removed the arm, this is the good part. The RB series of arms are decent economy arms, but have no height adjustment. The arm needs spacers to shim to the proper height. If the height is incorrect, the sound can sound muddy or shrill. It can be taken to extremes of either, depending on the height. Since the height is easily adjustable, have them adjust to the proper height, reshim and tighten. You can probably go by marks on the arm, if it is the original. If not, the Rega dealer should be able to determine the right height.
Regards,
BBIBH
