Huff, det var synd. Etter litt googling fant jeg følgende: "The K-31 woofer out of the KLF-30 is close spec wise to the later CF-4 woofer. They can be bought new from klipsch, but you will need to replace a pair at least to sound the same. Also, the 8 ohm Crites woofer would be a suitable...