However, amps often develop their best tone when wide open or "dimed." Incorporating an attenuator or "power soak" between the amp head and speaker cabinet allowed an amp to operate at full power while reducing the output from the speakers. Most high powered guitar amps include a master volume control to dial back the output. However, in recent years performers have learned that high stage levels made it difficult to create a well balanced mix. In the days before efficient PA systems, high powered 100 watt "stack" amplifiers that produced high stage sound levels were all the rage. This cabinet extension prohibits the use of a chrome swivel trolley with the AC15CH. North Coast Music offered an optional upgrade to black Vox grill.Īn extension to the bottom rear of the head cabinet provided minimal clearance for the five vacuum tubes suspended from the bottom of the AC15CH chassis (see photo at left). The AC15CH head cabinet was constructed from MDF (medium density fiberboard), finished in black basket weave vinyl and brown Vox grill cloth. The reverb and and tremolo circuits were solid state. The output, or power amp section utilized two EL84 tubes in the classic Vox Class A (self biased) NFB (no negative feedback) design. The preamp circuit was powered by three 12AX7 preamp tubes. These five controls affected both channels.Īside from the reverb and tremolo circuits, the AC15CH featured an all-tube audio signal path. The AC15CH also included a master volume, tone cut, reverb, and tremolo speed and depth controls. The "Normal" channel featured a volume control while the "Top Boost" channel featured volume, treble and bass controls. The AC15CH had a Normal and a Top Boost channel. The chassis from an Vox AC15C1 combo amp into a head cabinet. Introduced in January 2016, the Vox AC15CH incorporated No use on online auctions, eBay or Reverb. © 1996 - 2023 The Vox Showroom, all rights reserved.
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