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September 08, 2026 1 min read
Specifications for the OEM Systems AW-100WV and AW-IMP100WV outdoor in-wall volume controls.
The AW-100WV and AW-IMP100WV are high-performance outdoor 100-watt in-wall/in-box volume controls from OEM Systems, commonly used with outdoor landscape speaker systems. The AW-IMP100WV impedance matching model can be configured to maintain a safe system load when multiple controls and speakers are connected on the same amplifier line.
Both controls use autoformers to efficiently transfer power from amplifier to speaker — the electrical equivalent of a gearbox in an automobile, with each of the 12 volume positions acting as a different "gear." The AW-IMP100WV adds an impedance multiplier selector (1X, 2X, 4X, 8X, 16X) that protects the amplifier by maintaining a safe impedance load as more speaker pairs are added to a zone. The 1X position allows use in ordinary single-pair applications.
| Model | Type | Notes |
|---|---|---|
| AW-100WV | Autoformer w/ rotary 12-position switch | Standard outdoor volume control, no impedance matching |
| AW-IMP100WV | Impedance matching autoformer w/ rotary 12-position switch | Adds 1X/2X/4X/8X/16X impedance multiplier to protect the amplifier when multiple controls/speakers share a zone |
Manufactured by OEM Systems Co.
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