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* EDIT: Up-to-date information is available in Yek's Guide to the Fractal Audio Amplifier Models *
AC-20: based on Morgan AC20 Deluxe
The AC-20 models are based on a Morgan AC20 Deluxe. This is a very popular EL-84 equipped 20 watts boutique amplifier that looks like a mini Plexi. It’s based on a Vox, and according to many: far superior.
Morgan:
To my ears it’s a delicate tone. The AC20 sounds intimate and “small” in a good way.
It doesn’t have tone controls, apart from Cut (model: Hi-Cut) which attenuates highs, a Bright switch, a Brilliant switch (cuts bass) and a 12AX7/EF86 switch. For authenticity, keep all tone controls in the models except Hi-Cut at default.
The models have the Bright switch enabled. If that’s too bright for you, turn it off or adjust Hi-Cut. Cliff:
Use Input Drive to dial in the desired amount of gain. Don’t hesitate to use low settings for a really clean tone.
The modes are represented by the separate Bass and Treble (Brilliant mode) models, and EF86 preamp and 12AX7 preamp models.
The 12AX7 preamp tube sounds more glassy and has more sparkle. The EF86 is more full-bodied and fat. Increase Input Drive and the EF86 gets a lot more distorted than the 12AX7. Some players use the EF86 setting with single coils pickups and the 12AX7 setting with humbuckers, for matched response and output.
The original AC20 Deluxe also features power scaling. Cliff:
The Morgan pairs well with a G12H or AlNiCo Gold speaker. The Gold sounds like an AlNiCo Blue speaker that has been “well played-in”. Use this page to see which AC-20 cabs stock cabs are available.
A selection of YouTube videos:
AC-20: based on Morgan AC20 Deluxe
The AC-20 models are based on a Morgan AC20 Deluxe. This is a very popular EL-84 equipped 20 watts boutique amplifier that looks like a mini Plexi. It’s based on a Vox, and according to many: far superior.
Morgan:
"The Morgan AC20 Deluxe is a deceptively simple amplifier that is capable of producing a myriad of early 60s British tones but that is just the beginning. The switchable EF86 tube helps to make the range of tones from the cleanest of EL84 chime to ferocious high gain growl. The power level control allows you to dial in just the right amount of volume without sacrificing your tone the way some master volumes do. The AC20 Deluxe was created to solve modern guitar player amplifier issues with the ability to stay true to vintage tonality. It is equally at home in the studio or on the stage. It can be seen on the stages of superstars like Jeff Tweedy, Tim McGraw, The Band Perry, Taio Cruz and with Toshi Yanagi on Jimmy Kimmel Live. Plug into the AC20 Deluxe and you will instantly notice the familiar chime and compression of the Class A EL84 driven output section. The amplifier’s extreme touch-sensitivity will allow you to coax clean tones even at the highest of gain settings. To quote Keith Armstrong (Chief Engineer at Mix LA) “It is impossible to get a bad sound out of this amp!” (…) The AC20 Deluxe uses 3 separate switches to give you all of the original early 60’s EL84 tonalities, Normal, Brilliant and EF86. Never has such a deceptively simple amp had so many tonal options. Handwired in the USA."
To my ears it’s a delicate tone. The AC20 sounds intimate and “small” in a good way.
It doesn’t have tone controls, apart from Cut (model: Hi-Cut) which attenuates highs, a Bright switch, a Brilliant switch (cuts bass) and a 12AX7/EF86 switch. For authenticity, keep all tone controls in the models except Hi-Cut at default.
The models have the Bright switch enabled. If that’s too bright for you, turn it off or adjust Hi-Cut. Cliff:
"As with the real amp I dial in quite a bit of Hi-Cut."
Use Input Drive to dial in the desired amount of gain. Don’t hesitate to use low settings for a really clean tone.
The modes are represented by the separate Bass and Treble (Brilliant mode) models, and EF86 preamp and 12AX7 preamp models.
The 12AX7 preamp tube sounds more glassy and has more sparkle. The EF86 is more full-bodied and fat. Increase Input Drive and the EF86 gets a lot more distorted than the 12AX7. Some players use the EF86 setting with single coils pickups and the 12AX7 setting with humbuckers, for matched response and output.
The original AC20 Deluxe also features power scaling. Cliff:
"The AC-20 model is based on the amp with the power scaling at maximum power which effectively disables it (and sounds best IMO)."
The Morgan pairs well with a G12H or AlNiCo Gold speaker. The Gold sounds like an AlNiCo Blue speaker that has been “well played-in”. Use this page to see which AC-20 cabs stock cabs are available.
Additional AC-20 IRs are available in Cab Pack 4: Universal Noise Storage - UltraRes.
A selection of YouTube videos:
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