National Horizon 20 HiFi Amplifier Manual $8.99 National Horizon 20 HiFi Amplifier Manual quantity Add to cart Category: National Description Description For sale is reprint of National Horizon 20 HiFi Amplifier Manual. Manual is 8 pages Includes Part List and Circuit Diagram. Manual also includes 2 Service Bulletins Hi-Fi-8 and Hi-Fi-9 Related products National NC-57B NC57B Radio Receiver Manual $10.49 Add to cart National NC-183 NC183 Radio Receiver Manual $11.99 Add to cart National NC-44 NC44 Radio Receiver Manual $5.99 Add to cart NATIONAL Model HRO-5A1 Radio Receiver manual $10.49 Add to cart