The PastFX Echo 600 is an analog delay pedal built around three MN3005 bucket brigade chips, in the style of the Electro-Harmonix Echo 600 and the Deluxe Memory Man family of delays. PastFX describes it as "a cleaner, brighter delay than the DMM while still retaining the analog warmth and with more luscious modulation", and says its design is about getting the best out of each chip rather than more delay time1. It sits in the delay lane, in the bucket brigade analog tradition rather than the digital one.
Controls and modes
The pedal's level section is laid out as Input, Blend and Output, so the dry and wet levels can be set separately before the overall output2. PastFX's own page also refers to a Blend control, which it mentions in the context of setting input and output levels with Blend at zero1.
| Control | What it does |
|---|---|
| Input | Sets the input level2 |
| Blend | Blends dry and wet; PastFX references setting levels with Blend at zero1 |
| Output | Sets the overall output level2 |
Guitar Pedal X's review describes two modes with distinct uses: "Blue Short mode suits chorusing; Red Long mode suits delay."2 That makes the shorter setting a natural partner for a chorus-style sound and the longer setting for straight echo work.
Power and connections
The Echo 600 needs more voltage than the average pedal. PastFX specifies an 18V DC center negative supply drawing 85mA, and asks players to "only use high quality 18VDC regulated power supply with Boss style Negative tip"1. There is no battery option1.
The Echo 600 draws 85mA21, and its three MN3005 Bucket Brigade chips are the heart of its design, which PastFX describes as being about getting the best out of each chip rather than more delay time1. Give it its own supply outlet on your brick or isolated supply rather than sharing a daisy chain output with other pedals.
Connections are simple2:
- TS Input
- TS Direct Out
- TS Effect Out
The direct out gives a dry signal path alongside the effected one, which is useful for running wet/dry setups or feeding a tuner2.
Size and availability
PastFX houses the pedal in a 1590BB style enclosure measuring 120 x 94 x 50mm1. Guitar Pedal X points out that this is "less than half the size of the original!"2, which is the point of the design: the Echo 600 style circuit shrunk onto a normal pedalboard footprint.
| Specification | Value |
|---|---|
| Enclosure | 1590BB style1 |
| Dimensions | 120 x 94 x 50mm1 |
| Bypass | True bypass1 |
| Power | 18V DC center negative, 85mA1 |
| Battery | None available1 |
What reviewers said
"PastFX has done me proud once more - with a superb take on that legendary delay - this one sounds amazing - but does require a little finesse on the dial-in!"
In the same roundup, Karlsson also mentioned the tru-fi Aqua Echo 600 Analog, another small-batch analog delay, noting that "the older 3005 chips have a magic mojo about them typically where they sound just a little more lush than the modern replicas" and that he was "patiently waiting for a second batch of these to make it through to Joe's Pedals"3. That comment concerns the tru-fi pedal rather than the PastFX, but it gives a sense of how reviewers weigh original MN3005-era chips against modern reproductions, which is directly relevant to how the Echo 600's Xvive MN3005 chips are judged2.
PastFX also makes other analog delay designs, such as the PastFX Delay Machine II, for players comparing options in the same family.
Videos
Leon Todd
The Pedal Picassos
Questions
What delay chips are in the PastFX Echo 600?
The Echo 600 uses three MN3005 bucket brigade delay chips. PastFX notes that this is one more than the two chips used in the Deluxe Memory Man it draws from, and says the design is about getting the best out of each chip rather than chasing more delay time. Guitar Pedal X identifies the chips as Xvive MN3005 bucket brigade delay chips.
Does the PastFX Echo 600 take a battery?
No. PastFX states on its product page that there is no battery option available, and the pedal is powered from an external supply instead.
What power supply does the Echo 600 use?
PastFX specifies an 18V DC center negative power supply, drawing 85mA, and asks players to use only a high quality regulated 18VDC supply with a Boss style negative tip. A standard 9V pedal supply will not do here, so check what your daisy chain or brick provides before adding it to a board.
What do the Blue Short and Red Long modes do?
Guitar Pedal X's review describes two modes: Blue Short mode suits chorusing, while Red Long mode suits delay. In practice that means the shorter setting pairs well with modulation-heavy sounds and the longer setting with straightforward echo.
Is the PastFX Echo 600 true bypass?
Yes. PastFX lists true bypass operation among the pedal's specifications on its product page.
How big is the PastFX Echo 600?
PastFX gives the dimensions as 120 x 94 x 50mm in a 1590BB style enclosure. Guitar Pedal X notes that this enclosure is less than half the size of the original unit the pedal draws from.
Sources (3)
- ECHO 600, PastFx, 2026
- Guitar Pedal X, Guitar Pedal X, 2025-11-07
- Guitar Pedal X, Guitar Pedal X, 2025-12-10
