Shift Line A+ Everest M

The Shift Line A+ Everest M is a compact reverb and delay pedal, a new revision of the maker's Everest reverb/delay pedal¹. It offers six reverb and delay modes in two banks behind a simple knob-and-switch interface: three in Bank 1 on the MODE switch with a blue LED, and three more in Bank 2, reached by holding the BYPASS switch while selecting an algorithm, with a red LED¹. Holding the BYPASS switch also puts the pedal into Infinity Mode, its infinite sustain mode¹.

The controls

The Everest M keeps its surface simple: four knobs, one toggle and one footswitch. The REGEN knob simultaneously controls delay feedback and reverb decay, and the TIME knob controls delay time and affects reverb decay for effect sync, which is what lets the pedal stay this small¹.

Because TIME and REGEN are shared, the delay and reverb interact: dialing in a longer delay time also stretches the reverb decay, and the REGEN knob feeds both at once. Turning REVERB or TIME fully counterclockwise lets you run the pedal as a delay-only or reverb-only box¹.

Six algorithms in two banks

The algorithms are split into two banks of three sounds each. Bank 1 holds extended versions of the original Everest algorithms, with access to Infinity Mode; Bank 2 contains new sounds¹. The original Everest carried three modes, described by Shift Line as "bright and cutting Sunshine, mild and woozy Eclipse, whirly and psychedelic Moonshine"², and those three characters carry over into the M's first bank.

Bank 1 (blue LED, MODE switch alone)¹:

• Moonshine (Up): initial delay repeats and reverb reflections are accompanied by octave sounds for a weird, otherworldly effect¹
• Eclipse (Center): modulated delay repeats and solemn reverb reflections¹
• Sunshine (Down): bright and cold delay and reverb¹

Bank 2 (red LED, MODE switch held while BYPASS is pressed)¹:

• Low (Up): a loud lower octave with a long decay mixed into the reverb reflections, together with filtered delay repeats, creating a powerful low-frequency pad¹
• Tape (Center): modulated tape-style delay with characteristic repeat degradation, accompanied by dark vintage reverb¹

The maker's page describes the Bank 1 sounds in character terms: of Sunshine it says "The delay and reverb in this mode are so bright and cold they will send shivers down your spine!"¹, and of Eclipse, "Modulated delay repeats and solemn reverb reflections make for a perfect soundscape of the Himalayas at dusk"¹.

Infinity Mode

Press and hold the bypass switch for more than 0.3 seconds and the Everest M enters Infinity Mode, which simulates turning the REGEN knob to the max¹. What happens depends on the algorithm:

• Reverbs become infinite or very long, lasting 2 to 5 minutes¹
• Delays go into maximum feedback¹
• The LED flashes in two colors while the mode is active¹

Release the switch and REGEN returns to wherever the knob is set¹. It works as a performance tool: kick the switch mid-phrase for a swell of endless reverb or a self-oscillating delay, then let go to drop back to your dialed-in sound.

Power and connections

The Everest M runs on 9V DC at up to 80mA, negative tip, through a 2.1/5.5mm jack, and Shift Line specifies a regulated PSU only¹. The maker notes that the current draw may reach 80mA, so battery life would be unlikely to exceed one or two hours even if battery power were an option, and a matching power supply is recommended for regular use¹.

The pedal is mono throughout: one mono unbalanced input at 1MOhm input impedance, one mono unbalanced output at 100Ohm output impedance¹. It uses active bypass rather than true bypass; Shift Line says the dry signal is unaffected and that the active design means there is no audible clicking¹.

Everest M and Everest II

The Everest M is a new revision of the Everest reverb/delay pedal¹. Its signal path is mono throughout: a single unbalanced input at 1MOhm impedance and a single unbalanced output at 100Ohm impedance¹. Its six modes are split across two banks, with the second bank reached by holding the BYPASS switch while selecting an algorithm¹.

The II's MODE switch selects both bank and patch, and its BEAT switch adds delay subdivisions the M does not have³. Both the Everest M and the Everest II Black Edition are listed by the maker as discontinued¹³, so both are now found on the secondhand market rather than new.

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