MVC-25 - Audio OSD Audio - Free user manual and instructions
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| Type of Product | In-wall mono volume control |
| Brand | OSD Audio |
| Model | MVC-25 |
| Power Handling | 25 W RMS |
| Impedance | 8 – 16 ohms |
| Control Type | Rotary, 12 positions |
| Frequency Response | 20 Hz – 20 kHz |
| Dimensions (H × W × D) | 4.5 × 2.75 × 1.4 inches |
| Weight | 0.35 lb (160 g) |
| Mounting | Decora wall plate |
| Material | ABS plastic |
| Color | White, paintable |
| Connection | Screw terminals |
| Power Source | Passive, no external power needed |
| Installation | Fits standard electrical box |
| Maintenance and Cleaning | Wipe with a dry cloth; avoid solvents |
| Safety | Turn off amplifier before wiring |
| Spare Parts | Knob and faceplate available separately |
| Repairability | No user-serviceable parts; professional service recommended |
| General Information | Compatible with low-impedance speaker systems |
Frequently Asked Questions - MVC-25 OSD Audio
What is the maximum power rating of the MVC-25?
The MVC-25 is rated for 25 W RMS, making it suitable for moderate-volume home audio systems. Ensure the amplifier's output does not exceed this rating to avoid damage.
Is the MVC-25 compatible with 70V distributed audio systems?
No, the MVC-25 is designed for low-impedance speakers (8–16 ohms). For 70V systems, use a dedicated 70V volume control with matching transformers.
How do I install the MVC-25 volume control?
Install the MVC-25 in a standard electrical box using the included mounting hardware. Connect the amplifier output to the "In" terminals and the speaker wires to the "Out" terminals, then attach the Decora faceplate.
What is the impedance of the MVC-25?
The MVC-25 is compatible with 8–16 ohm speakers. It maintains a nearly constant impedance load to the amplifier, preventing distortion at different volume settings.
Can I use the MVC-25 with a 16-ohm speaker?
Yes, the MVC-25 works with 8-, 12-, and 16-ohm speakers. The internal impedance compensation ensures consistent performance across these loads.
Does the MVC-25 require a power supply?
No, the MVC-25 is a passive device and does not require an external power source. It operates by attenuating the audio signal directly.
How many volume steps does the MVC-25 have?
The rotary control offers 12 discrete steps, allowing precise volume adjustment from silent to full output with a clear detent at each step.
What is the frequency response of the MVC-25?
The MVC-25 has a frequency response of 20 Hz – 20 kHz, which covers the full audio spectrum with minimal coloration.
Can I use the MVC-25 for stereo audio?
No, the MVC-25 is a mono volume control. For stereo, you will need two units (one per channel) or a stereo model such as the OSD Audio SVC-25.
What should I do if the volume control feels loose?
If the knob feels loose, tighten the nut behind the faceplate. If the knob still slips, the spare knob can be replaced without removing the entire unit.
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USER MANUAL MVC-25 OSD Audio
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Product information
Brand : OSD Audio
Model : MVC-25
Category : Audio