Soundstream Class A 5.2 (Chrome)

OK so that answers that. I bet they used TO-220 cases.

BTW not to prod on anybodys previous argument, but there seems to be several data sheet versions of the TIP142/147 in terms of SOA. Theres the TO-220, TO-218, and TO-247 data sheets for these. Each seem to have slightly different SOA, especially the TO-218 which may be higher rated than even the TIP102/107s with TO-220 package.

Likely only the TO-220 package would fit anyway.

I'm going to try and stay away from TIP142/147 setups. Just a personal decision.

Thank you