| Crossovers | Digital EQ/xovers/Line Converters | Line Converters | EQ, Pre Amps |
| 2XS (original) | DQX | LC6 | EQQ |
| 3XS | DQXS | LC7 | EQT |
| 4XS | DQL-8 | LC8 | EQL (original) |
| DQS | EQX (original) | ||
| DQT | |||
| DXS | |||
| DDC | |||
| Line Drivers | Center Ch Processor | Spatial Restoration | Epicenter |
| MATRIX | SYSTEM 90 MODEL 11 | ESP-2 | The Epicenter (original) |
| MVC | System 90 Model 20-40-48 | ESP-3 | EPIC-150 |
| In-Dash Processor | RTA | ||
| HPX | SA-3055 | ||
| Four.1i | SA-3050A | ||
| Three.1 |
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