![]() ![]() However, for recording, we would still favour the slightly more compressed frequency response of the 10-inch version, because it's quicker and easier to dial in. Ideal for home users, and great for lower-volume environments, the AC4C1-12's bigger speaker lends more authority and punch for live use. There are lots of small single-ended amps clamouring for your cash, but only a few of them have one of the most famous badges in guitardom. The problem is we dont have enough information to do the math. A 10-watt tube amp through a speaker with 95db sensitivity should be equally as loud as a 20-watt tube amp through a 92db speaker ('on paper'). Ideally, you need a decent humbucker for this, and the AC4 sounded great with our Les Paul, although vintage PAF users should note the increased gain makes unpotted pickups much more likely to squeal. Adding 3db in speaker sensitivity will give the equivalent boost in overall volume as doubling the output wattage. Turn up the gain some more, and the AC4's blues/rock alter ego appears, with a sweet singing sustain that's great for invoking the original British Invasion vibe. Outputs: 1 x External Speaker Jack Controls: Volume, Gain, Bass, Treble, Reverb Tube Compliment: 2 x 12AX7 / 2 x EL84 Dimensions (W X D X H): 520 x. Set that treble knob right, though, and you get the chiming chord effect that makes the AC4's bigger brother one of the great rhythm guitar amps. Or it can be looked at as a Blue Pup with a smaller magnet. Used at lower gain levels, the AC4's clean sounds are typical of what you might expect to hear from an early Vox: a boxy midrange and restrained bass coupled with a zingy treble that needs to be carefully tamed. CJSutton said: The speaker that is working well in the AC10 amp is actually a hybrid speaker - its a DT10 base (20oz magnet, 1.5' voice coil) with the Blue Pup cone and dustcap. We tried it with a Strat fitted with regular-output Duncan Alnico Pro II pickups (Hank-approved clarity for vintage Shadows stuff ) and a PAF-loaded Les Paul Standard. Sonically, the AC4 is well behaved, with just a faint background hum - something common to many single-ended designs. ![]() This apart, the AC4 is a good-looking and generally well-made little amp. The problem is we don't have enough information to do the math. There's ventilation, but it's not very effective. Adding 3db in speaker sensitivity will give the equivalent boost in overall volume as doubling the output wattage. Because the AC4 is a pure single-ended Class A design, the EL84 runs hot - very hot in fact - with a lot of heat conducted to the control panel. ![]()
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