These are the exact correct fuses for the Cerwin Vega XLS-28 and D9. Note on the D9, some Cerwin literature specifies a 2.5 amp fuse for the D9, however some actual D9 crossover plates say 3 amp right on them. I'd go with the 3 amp on those. These are also a popular option for all the older Cerwin Vega speakers that spec the 2.5A fuse (see my other listing) After many years of experience, and the experience of other Cerwin fans, may people upgrade to the 3A fuses, especially in the 12" and 15" models. This is a popular switch. Fuses are high quality, UL listed, Littelfuse brand. Feel free to contact me if you are unsure about which fuse you need, want, applications, etc. Will be packed securely and shipped promptly. Thanks!