I bought a Marantz 27 new in fall of 1970 and it was a Superscope product. Don't know when they bought out Marantz brand but someone made design decisions that greatly downgraded the product. Very disappointing performance but I believe most if not all the 22xx series were far better - perhaps reacting to the poor performance of the early '70s products.
By the mid-'70s, Harman-Kardon, Sansui, and several others offered some very good products. To generalize, my experience suggests the '75-'80 period offers the best of the later (meaning solid state) vintage electronics.
By the mid-'70s, Harman-Kardon, Sansui, and several others offered some very good products. To generalize, my experience suggests the '75-'80 period offers the best of the later (meaning solid state) vintage electronics.