Enclosure not stated · 3 knobs
MI Audio Blues ProVerified
Based on the MI Audio Blues Pro· 2 other boards clone it
From the post
Manufacturers description:
A low/medium overdrive with lots of gain and a subtle fuzz mode.
The MI Audio Blues Pro Overdrive Guitar Pedal's no-nonsense circuitry offers effects that are very 'immediate'. There are no internal trimmers, so that with the Blues Pro you get a very easy-to-use pedal, with the classic configuration of Gain, Tone and Volume. The MI Audio Blues Pro is a bit compressed, which gives the pedal a bit of extra punch. Blues Pro is an overdrive that also sounds throaty in high gain settings.
In the Fuzz mode the tone control becomes more of a 'sponge' control. With the tone all the way up, the Blues Pro pedal sounds like a louder version of the original. As you turn the Tone control down, the response time of the Blues Pro increases. This sounds particularly cool on chords. Turn the MI Audio Blues Pro Overdrive effect's Tone control all the way down, and the tone takes a second or two to settle.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 24 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×3 | 1K | 1k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×2 | 330K | 330k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Capacitors 10 | ||||
| ×1 | 10p | 10p | read from the layout by eye | |
| ×1 | 33p | 33p | read from the layout by eye | |
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 1n5 | 1.5n | read from the layout by eye | |
| ×2 | 22n | 22n | read from the layout by eye | |
| ×1 | 220n | 220n | read from the layout by eye | |
| ×1 | 1u | 1u | drawn as a film cap; read from the layout by eye | |
| ×1 | 2u2 | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 22u | 22u | electrolytic; read from the layout by eye | |
| ×2 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4001 | 1N4001 | read from the layout by eye | |
| ICs 1 | ||||
| ×1 | LM4558N | LM4558N | legend: LM4558N or JRC4558D; read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A250K | A250k | Potentiometer | read from the layout by eye |
| Tone | B10K | B10k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Fat | SPST | SPST | toggle; read from the layout by eye | |
| Fuzz | SPST | SPST | toggle; read from the layout by eye | |
Other boards based on the MI Audio Blues Pro
- MI Audio Blues Pro Dirtbox Layouts
- MI Audio Blues Pro Effects Layouts (blog) · 1590B