National Horizon 10 HiFi Amplifier Manual Sorry, this product cannot be purchased. $8.99 Categories: N, National Description Description For sale is reprint of National Horizon 10 HiFi Amplifier Manual. Manual is 8 pages Includes Part List and Circuit Diagram. Manual also includes 3 Service Bulletins Hi-Fi-7, Hi-Fi-8 and Hi-Fi-9. Related products National HRO-7 HRO7 Radio Receiver Manual Shortwave ham $10.49 Read more National NC-173 NC173 Radio Receiver Manual $10.49 Read more National HRO Reception Set R-106 Receiver Manual $7.99 Read more National NC-44 NC44 Radio Receiver Manual $5.99 Read more