PQ-4 Parametric Equalizer
| Brand | Boss |
| Function | Effect, EQ |
| Produced | 03/91 - 11/97 |
| Country | Taiwan |
| Form Factor | Footswitch |
| Power | 9v DC or 9V Battery |
| Connections |
|
| Controls |
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| Notes | Parametric Equalizer |
| Brand | Boss |
| Function | Effect, EQ |
| Produced | 03/91 - 11/97 |
| Country | Taiwan |
| Form Factor | Footswitch |
| Power | 9v DC or 9V Battery |
| Connections |
|
| Controls |
|
| Notes | Parametric Equalizer |