The Dynaco A-25 was once celebrated for its natural and distortion-free sound reproduction; however, the passage of time has taken its toll on the original components, leaving a shadow of their former glory. GRS has created a replacement woofer that captures the essence of the original design, with the reliability you'd expect of a modern woofer! This 10-inch drop-in replacement was created for those who want to rediscover their favorite music as they once heard it.