Enclosure not stated · 3 knobs
Electro Harmonix Knockout Attack EqualizerVerified
Based on the Electro-Harmonix Knockout Attack Equalizer· 1 other board clones it
- Category
- EQ / Filter
- Difficulty
- Medium
- Build
- Vero· 22×24· 40 cuts, 24 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Electro Harmonix, EQ, Filter, Knockout
From the post
"The Knockout is a powerful two-filter combination that can make your Les Paul sound like a Strat and your Strat sound like a Tele. Its secret...the Knockout has a 7 pole filter for sculpting the low end of your mids and a 6 pole filter to shape the top end of the mids. This provides incredible tone shaping. Use after distortion to bring out the heavy weight punch of the metal masters. The Knockout is also truly amazing on Bass."
Original FSB thread and schematic available here.
... and a layout with added Input & Output caps. (Will remove the one above later)
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 30 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×5 | 27K | 27k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×2 | 2K2 | 2.2k | read from the layout by eye | |
| ×3 | 2K7 | 2.7k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×1 | 680K | 680k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×3 | 270K | 270k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 11 | ||||
| ×2 | 470p | 470p | read from the layout by eye | |
| ×3 | 2n2 | 2.2n | read from the layout by eye | |
| ×2 | 4n7 | 4.7n | read from the layout by eye | |
| ×1 | 10n | 10n | read from the layout by eye | |
| ×2 | 22n | 22n | read from the layout by eye | |
| ×2 | 47n | 47n | read from the layout by eye | |
| ×2 | 220n | 220n | read from the layout by eye | |
| ×2 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×3 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | BC309 | BC309 | read from the layout by eye | |
| ICs 2 | ||||
| ×2 | 4558 | 4558 | read from the layout by eye | |
| ×1 | 7660S | 7660S | read from the layout by eye | |
| Potentiometers 3 | ||||
| High | B100K | B100k | Potentiometer | read from the layout by eye |
| Dry | B100K | B100k | Potentiometer | read from the layout by eye |
| Low | B100K | B100k | Potentiometer | read from the layout by eye |
Other boards based on the Electro-Harmonix Knockout Attack Equalizer
- Electro Harmonix Attack Equalizer / Knockout EQ Dirtbox Layouts