Washburn positioned the C5B within its Classical Series as an acoustic guitar finished in black. The designation "Classical Series" places the instrument in the nylon-string, traditional classical guitar category within Washburn's acoustic line.

Beyond the series name, finish colour, and brand, the available source material does not provide further detail on tonewoods, hardware, scale length, nut width, or other build specifications. Owners seeking precise construction details should consult any documentation that accompanied the instrument at the time of purchase.

For setup, action adjustment, or parts compatibility questions, a qualified luthier or experienced guitar technician will be best placed to assess the instrument directly.