I've got a Yamaha CR-820 (55wpc) powering a pair of NS-670 speakers.
A beautifully musical combination, and capable of pissing off the neighbors if needed :beerchug:
Rex
Available at most auto parts outlets:
https://www.permatex.com/products/specialized-maintenance-repair/defogger-repair/permatex-complete-rear-windowdefogger-repair-kit/
Rex