Asheville Music Tools APH-12 Launch Edition

The APH-12 Launch Edition is a limited-run version of Asheville Music Tools' 12-stage analog phaser, the same circuit as the standard APH-12 dressed in a one-off finish. Asheville Music Tools describes it as a "100% Analog 12-Stage All-Pass Filter, Dynamic Phaser, Vibrato Pedal," with the signal, modulation and control paths all analog¹.

At its core, the pedal is an all-pass filter network with a selectable number of stages from 1 to 12, odd stages out of phase, three calibrated mix settings and over 400 components. The maker says it "nails that classic 12 and 6-stage phaser sound with warm overdrive on tap," and that it also delivers faux Leslie warble, vibrato and tremolo, vocal envelope-followed sounds and multi-peak EQ shaping¹. It is discontinued, and the standard APH-12 and the APH-12 Plus carry the design forward.

What it does to your sound

The stage count is the heart of the pedal. A Stages switch offers 8 total options across the 1 to 12 range: stages 1 through 6, 9 and 12, with odd numbers running out of phase¹. Delicious Audio notes that stage count changes the character entirely, since "a 2-stage phaser is a notch filter," and that the original Analoger APH-12 offered up to 12 stages selectable via a 12-position rotary knob⁴. More stages means more notches moving through the spectrum, so 4- and 6-stage settings sit in familiar classic territory while 12 stages gives a deep, intense sweep. The maker points out that "there is nothing quite like a 12-stage phaser with a 2 minute sweep"⁵.

A three-position Mix switch shapes the wet/dry balance:

A Drive control adds up to 30dB of boost with increasing saturation and mid emphasis as gain is raised, which is where the "warm overdrive on tap" comes from¹. Premier Guitar's reviewer found the pedal capable of "radical filtering and EQ effects, vibrato, tremolo, ring modulation," calling the North Carolina-built APH-12 "an outstanding modulation, filtering, and noise machine"⁶.

The controls

The MOD switch sets the modulation source. Up gives a slow LFO from under 0.01Hz to about 2.3Hz for classic slow phasing; middle gives a fast LFO from 0.1Hz or less to about 78Hz for faster phasing, vibrato and ring mod sounds¹. In envelope mode, the Envelope control provides positive sweep control of modulation with fast attack and medium release, so the phasing follows your playing dynamics¹.

The expression/CV input is a TRS jack usable with a CV or expression pedal, with a CV range of 0 to 5V, a current-limited 5V supply on the ring and the control input on the tip. The 4-way switch assigns it to Sweep, Resonance, Rate or Amount, additive to the front panel knob and extending its range¹. Guitar Pedal X's reviewer, Stefan Karlsson, described the Sweep control as the all-pass filter's manual control, and noted that the sweep "adjusts the center frequency for the modulations, effectively works like a tone control," as Premier Guitar's reviewer put it⁷⁶.

Power and bypass

The Launch Edition runs on 9V DC through a standard center negative 2.1mm x 5.5mm barrel, drawing under 125mA, typically 70 to 100mA, with up to 200mA at start up¹.

Bypass is true bypass with a mechanical footswitch, and the LED indicates either the LFO rate or the envelope pre-amount signal¹.

The Launch Edition finish and numbering

The Launch Edition units were numbered #128 through #148¹. Each one is unique: the enclosures use actual pages from the Spanish architecture book "Taller de Arquitectura" by Ricardo Bofill, with a custom retro finish by artist Justin Hock and Gorva solid aluminum knobs¹. The maker had said the finish would be an amethyst/purple color¹. Like the rest of the range, it is built in a genuine Hammond die-cast aluminum enclosure¹.

Versions and availability

The APH-12 line has three versions:

The Plus adds a second envelope section (ENV #2, assignable bi-polar with pre or post drive sensitivity), a new input sensitivity control with pre and post-gain sources and both positive and negative modulation, and a higher current draw of under 140mA². It was released in limited quantities as part of the maker's small batch series, limited to one per customer².

The original Analoger APH-12 launched in April 2025 and, as Guitar Pedal X reported at the time, "it's already sold out in most places" shortly after release⁸. By May 2026 the reviewer noted it was still available direct from the Asheville Music Tools site⁷. Premier Guitar's reviewer called the near-$400 price "a value" given what the pedal does⁶.

What reviewers said

Guitar Pedal X's Stefan Karlsson reviewed the APH-12 as the 29th phaser in his reference collection and compared it with the Caroline Arigato:

He judged it a satisfying all-rounder at $397⁵. Premier Guitar's reviewer found that in 12-stage mode "the APH-12 excels at shaping intense modulations that can be slotted surgically in a mix"⁶. Delicious Audio highlighted the design pedigree, describing it as a fully analog 12-stage phaser designed by the mind behind the Moog Moogerfooger series⁴.

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