The Analog Man BI-CHORUS is an analog chorus pedal built around a single chorus circuit with two sets of SPEED and DEPTH knobs, giving two chorus sounds that can be called up without adjusting knobs mid-song. It has been made by Analog Man since January 2005, when the company introduced it alongside another chorus pedal, and it sits in the maker's chorus line with the Analog Man Chorus and Clone Chorus.12
One chorus circuit, two settings
The idea behind the Bi-Chorus is simple: there is only one chorus circuit, but it carries two sets of SPEED and DEPTH knobs, one for each setting. The A-B footswitch selects between the A and B settings at any time, so a player can set a subtle chorus on one side and a deeper sound on the other and move between them with a stomp. Two LED indicators blink when the pedal is on, showing which side, A or B, is selected and giving a visual read of the speed.1
The maker's own account of the design is that it began as a copy of the classic chorus and grew from there31:
"We started making that pedal as a 'CLONE' but after many improvements we feel it has far surpassed the original"
The circuit is fully analog, built on original 1024-stage BBD (bucket-brigade) chips, which the manual describes as being used for high fidelity.1
Controls and connections
| Control or jack | What it does |
|---|---|
| SPEED A / DEPTH A | Speed and depth for the A setting1 |
| SPEED B / DEPTH B | Speed and depth for the B setting1 |
| ON footswitch | True bypass on/off, no loss of tone when off1 |
| A-B footswitch | Selects between the A and B settings at any time1 |
| IN (right jack) | Guitar plugs in here1 |
| OUT (left jack) | Connects to the amp1 |
| 9V DC jack | Barrel type, center negative adapter jack1 |
The DEEP toggle works on both sides of the Bi-Chorus; on this pedal, LEFT is deep and RIGHT is normal.2 Inside, a MIX trimpot sets the wet/dry balance: Analog Man notes it should be turned a little counterclockwise of center to match the sound of their normal chorus pedal.2
Power and battery
The Bi-Chorus runs on a regulated 9V DC adapter, Boss PSA style, center negative, and the manual is emphatic that it must be DC, not AC. It can run at up to 18V, with 15V described as optimal, and 12V DC suggested for more headroom. A good alkaline battery can be used instead, and the battery is disconnected whenever the input cord is removed or a power cable is inserted.1
Because the pedal accepts up to 18V and 15V is called optimal, check what your daisy-chain supply delivers before sharing a port with lower-voltage pedals; the manual specifies a regulated DC adapter, Boss PSA style, center negative.1
Stereo version
Analog Man also offers the Bi-Chorus in a true stereo version, which the manual suggests for the ultimate chorus sounds with two amps; either output can be used in mono. On a stereo model run in mono, the top output jack, or the center jack if the jacks are on top, gives the normal mono chorus sound, while the bottom or leftmost jack gives a slightly different sound.1
Build and warranty
The pedal is housed in a strong, high quality Hammond style die-cast aluminum box with a silk-screened case and hammer finish powdercoating. Analog Man backs it with a one year warranty, except for damage from misuse or, in the manual's words, gorilla-like stomping. Support goes through Mike at AnalogMike@aol.com, analogman.com, or 203/778-6658.1
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Questions
What does the A-B switch do on the Analog Man Bi-Chorus?
The A-B footswitch selects between the A and B settings at any time. Each setting has its own Speed and Depth knobs, so you can set up two different chorus sounds and switch between them without bending down to turn knobs. Two LED indicators blink when the pedal is on, showing which side, A or B, is selected.
Is the Analog Man Bi-Chorus true bypass?
Yes. The manual describes the on/off footswitch as true bypass, with no loss of tone when the pedal is off. That switch is labelled ON, and the separate A-B switch chooses between the two chorus settings.
Does the Analog Man Bi-Chorus come in a stereo version?
Yes. Analog Man offers the Bi-Chorus in a true stereo version, which the manual suggests for using the pedal with two amps. On a stereo model used in mono, the top or center output jack gives the normal mono chorus sound, while the bottom or leftmost jack gives a slightly different sound.
What voltage does the Analog Man Bi-Chorus run on?
The pedal runs on a regulated 9V DC adapter, Boss PSA style with a center negative barrel jack, and can run at up to 18V. The manual calls 15V optimal and suggests 12V DC if you want more headroom. It must be DC, not AC.
Can the Analog Man Bi-Chorus run on a battery?
Yes. The manual says to insert a good alkaline battery as an alternative to a power adapter. The battery is disconnected when the input cord is removed or when a power cable is inserted, so unplugging the input preserves the battery.
Is the Bi-Chorus analog or digital?
It is fully analog. The circuit uses original 1024-stage BBD, or bucket-brigade, chips, which the maker describes as being used for high fidelity. The design began as a clone of the original chorus pedal and was refined with many improvements.
Sources (3)
- bichorus.docx, Analog Man (analogman.com), 2024-04
- Analog Man Chorus Pedals, aNaLoG.MaN (analogman.com), 2026
- Microsoft Word - bichorus.doc/bichorus.pdf), Analog Man (analogman.com)
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