Vox AC15C1X 15 Watts Single Celestion Alnico Blue Speaker 2 Channels Combo Amp - 12"The AC15C1X with a Celestion Alnico Blue Speaker Alnico Blue speakers made by the Celestion Company are an especially great match for the AC30. They have reigned as the standard combination ever since the VOX brand was established. Now, a model featuring these Alnico Blue speakers is available in the 15W series. It's called the AC15C1X. Experience the rich VOX sound that's overflowing with vintage tone. An Evolution in Tone VOX Custom Series amps