McIntosh MA6900 integrated amp. For reference, the metal pins are insulated and looks a lot like these here, except they are gold plated and stamped McIntosh.
Try pure silver like the mhconley post, night and day, gold over copper (Mcintosh) vs pure silver, different you will hear it. Copper with silver clad makes a change in the mids, you might not like, clean copper or pure silver, nice change. I've done it and tinkered with a MA6900, and the surround was an MX120, on a house boat. Nice little nugget for 2 dollars worth of good copper or 15 for silver.
Regards
Try pure silver like the mhconley post, night and day, gold over copper (Mcintosh) vs pure silver, different you will hear it. Copper with silver clad makes a change in the mids, you might not like, clean copper or pure silver, nice change. I've done it and tinkered with a MA6900, and the surround was an MX120, on a house boat. Nice little nugget for 2 dollars worth of good copper or 15 for silver.
Regards