A Greenback also makes good mix-up with a Blue. In fact, both are great speakers for the AC30 and the discussion is like comparing apples and oranges – neither is better, they are just different and it depends on your personal taste. There is a lot of discussion about Blue vs. Especially when it comes to overdriven sounds, these speakers are a good choice if you want to push your AC30 into a more marshall-flavored territory. The Greenback is a very balanced speaker that is capable of legendary classic rock tones.
Compared to the Blues, the Greenbacks sound seems to be less chimey but more beefy, solid and it is often described as providing a wooden type of tone. The next big classic speaker used in AC30s is the Celestion Greenback which uses a ceramic magnet.
#VOX AC30CC2 G12H30 SERIES#
However, not all series are equipped with original Celestion (for instance, CC series has chinese copies). The Blues are used in all X-series AC30 models (like AC30C2X, AC30HW2X, etc.). A lot of people agree that these are the ‘most classic’ AC30 speakers. The small wattage (15W) also makes them a suitable choice if speaker breakup is desired. In a nutshell, the Blues are famous for their magical chimey, shining and shimmering tone, especially at clean and soft crunch sounds which is home territory for the AC30. In fact, the Alnico Blue was the first dedicated speaker to be exclusively used in a guitar-amp. No other speaker has been associated more often with the Vox AC30 than the Celestion Alnico Blue, also known as “Blue Bulldog”. Therefore, you should leave any final decision to your ears and mainly consider this article and our given sound samples as a fingerpost providing a basic orientation (the samples are recorded with AC30HW2 + Fender Telecaster, all with same settings). However, we have to agree that people are different in their musical taste, equipment, requirements, so to say in many aspects. There is a lot of discussion on which speakers may be the best choice for the AC30. Indeed, speakers heavily contribute to the final sound of your guitar amp. The break-in time depends on the particular speaker, the kind of music and how often you play it. After a longer time being played, however, they usually smooth up. When speakers are new and not broken in yet, they may sound too bright and harsh. Older AC30s don´t have an impedance switch but are wired in standard 16 Ohms (for two speakers, 8 Ohms in series). If you choose the wrong position on your impedance switch, your amp may get damaged. Parallel wiring reduces the impedance, so if you wire two 16 ohm speakers the total impedance is 8 Ohms. You always have to get two speakers with the same impedance so if you wire two 8 ohm speakers in series (standard in newer AC30s) the total impedance is 16 Ohms. Most AC30s can handle both by switching the impedance switch to the according position. Speakers usually are sold in 8 or 16 ohm versions.
When you change speakers, it is important to use the right impedance. The classic AC30 combo features two 12” 8 ohm speakers which are usually wired in series resulting in a total impedance of 16 ohm. While a speaker exchange is comparatively easy to do, it may be pricey, depending on the speakers. While being the last limb in your signal chain, speakers do have a significant impact on your tone which may be even higher than the impact of tubes. This article provides information all related to speakers.
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