※Shipping service. Special Feature Speaker Systems and Sound Creation/W Woofer System Vol.2/Bass Horn System/Exploring the Relationship between CD Stains and Sound Quality/BLT Amplifier Measurement and Hearing Vol.2/Tube Preamp Experiments and Production/Published Circuit Diagram: /Electro Voice TL303 Enclosure/TL405 Enclosure/S59.6.1 Published. The photograph is a sample, so the actual product may be broken, or there may be markings etc.