Check the listing for details. One Pair Classic Symasym 5-3 Discrete After-stage Power Amplifier Bare PCB Board. Condition: New. Listed at 7.51 USD. One Pair Classic Symasym 5-3 Discrete After-stage Power Amplifier Bare PCB Board Description:Symasym5-3 POWER AMP is a very well-known circuit on foreign diyaudio forums. The number of clicks on this circuit post is still very active. It has ultra-low distortion when fully loaded, and the sound quality can be said to be very good, 100W per channel (4 ohms) The power is very suitable for home use, and is suitable for driving high-power HI FI speakers above 6.5 inches. The circuit works in high partial class A and B, without noise and current sound. The production is simple, and the circuit is stable and reliable. Voltage feedback, suitable for HIFI players to ride and play with the machine.Suitable power supply range: DC+ - 20-40, the maximum output power is 100W when + - 40VDC,Mono structure. PCB size: 138*50*1.6MM FR4. Package including: One Pair Classic Symasym 5-3 Discrete After-stage Power Amplifier Bare PCB Board PaymentDelivery detailsTerms of salesReturnContact usPaymentWe accept payment by PayPal only.Payment must be received within 7 days after auctions ended.Delivery detailsItems will be shipped within 1-2 business days when we received payment.Shipping to USA takes about 8-15 days in normal condition,other countries takes about 15-35 days.Please verify your eBay primary shipping address. We are not responsible for any wrong or undeliverable addresses.Terms of salesAll items will be checked before packingYour feedback and 5 star ratings are much appreciated.If you are unhappy with your purchase, please contact us on negative / neutral feedback or low star ratings.ReturnIf you receive an item is damaged or defective, we will refund you or replace it with identical one.All damaged or defective items may be exchanged within 30 days.Contact usWe take full responsibility if you receive wrong item or damaged item or item not as describled. If you're not satisfied for any reason, please feel free to contact us.Just send us an eBay message.