OVC100 - Controller OSD Audio - Free user manual and instructions

Product Type	Audio Volume Controller
Model	OVC100
Brand	OSD Audio
Power Handling	100 Watts RMS
Impedance	8 Ohms
Frequency Response	20 Hz - 20 kHz
Attenuation Steps	12 steps with detent
Connector Type	Spring-loaded speaker terminals
Mounting Type	Single-gang wall box
Dimensions (H x W x D)	4.5 x 2.8 x 1.5 inches
Weight	0.2 lbs
Operating Voltage	Passive, no power required
Material	ABS plastic with white finish
Compatibility	Works with most 8-ohm speakers
Includes	Knob, faceplate, mounting screws, wire nuts
Maintenance	Wipe with dry cloth; avoid liquids
Safety	Use within rated power; turn off amplifier before wiring
Spare Parts	Knob and faceplate available separately
Repairability	Designed for easy replacement; no user-serviceable parts inside
Certification	CE, RoHS

Frequently Asked Questions - OVC100 OSD Audio

How do I install the OVC100 volume controller?

First, turn off your amplifier. Connect speaker wire from the amplifier to the INPUT terminals, then from the OUTPUT terminals to your speakers. Mount the controller into a single-gang wall box using the included screws. Attach the faceplate and knob.

What is the power handling of the OVC100?

The OVC100 is rated for 100 watts RMS at 8 ohms. Ensure your amplifier does not exceed this rating to avoid damage.

Can I use the OVC100 with 70V or 100V distributed audio systems?

No, the OVC100 is designed for low-impedance (8 ohm) systems. For constant-voltage systems, use a dedicated volume control with a transformer.

How many pairs of speakers can I connect to one OVC100?

The OVC100 is intended for a single pair of speakers (one stereo channel). For multiple zones, use separate controllers or an impedance-matching speaker selector.

Does the OVC100 require external power?

No, the OVC100 is a passive device and does not need any power source. It simply attenuates the audio signal.

What type of wire should I use?

Use standard 16-18 AWG speaker wire. Ensure proper polarity (positive to positive, negative to negative) for best performance.

Why is my sound distorted when using the controller at low volume?

Distortion may occur if the controller is turned down too low, causing the amplifier to clip. Set the controller to a moderate level and adjust volume at the source or amplifier instead.

Can I paint the faceplate?

Yes, the faceplate is paintable. Lightly sand the surface, apply a primer, then paint with a high-quality latex paint to match your wall.

How do I clean the OVC100?

Wipe the surface with a soft, dry cloth. Do not use water, cleaners, or abrasive materials as they may damage the finish.

What should I do if the knob becomes loose?

Check the set screw on the knob. Tighten it with a small Allen wrench (usually 1.5mm). If the knob is damaged, replacement knobs are available from OSD Audio.

USER MANUAL OVC100 OSD Audio

Installation Instructions

Step 1: Determine and set impedance with match switch

• Count the total number of 8 ohm and 4 ohm speakers you are connecting to.
• Determine if the amplifier can support an 8 ohm or 4 ohm speaker load. You should be able to find the information in your amplifier or receivers owner's manual.
• Determine the correct impedance match switch setting using the chart below (See Fig. 2)
• Set the impedance match jumper on all the volume controls in the system to the same position (1/2X, 4X, or 8X). (See Fig. 1.)

Figure 1 Impedance Setting

Figure 2 Impedance Chart

No. of 8 ohm pairs	1-2	3-4	5-8
Switch Settings	1/2x	4x	8x

OSD Audio does not recommend installing more than 8 volume controls in parallel. OSD audio also does not recommend installing more than two 8 Ohm speakers per channel on each volume control without additional impedance protection.

Setting the impedance match switch higher than 1X yield less power per pair of speakers. For example: an amplifier rated at 80 Watts per channel RMS into 8 ohms is to be used for 8 pairs of speakers. In order to accommodate 8 pair of 8 ohms speakers, an 8 impedance match setting must be used, therefore, this will limit to power to 10 watts for each speaker pair, or 1/8th of the amplifier's power. (See Fig. 2)

Step 2: Mounting the enclosure

• If conduit is to be used, run the necessary wiring up through the conduit and into the opening at the base of the enclosure.
• Mount the enclosure onto the PVC conduit using the applicable adhesive material
• Use the 4 holes in the back sides of the unit to secure the enclosure to a stationary object or wall. (See Fig. 3.)

Warranty & Repair

All OSD Audio speaker products have (5) year Limited Warranty against defects in materials and workmanship. Proof of purchase must accompany all claims. During the warranty period OSD will replace any defective part and correct any defect in workmanship without charge for either parts or labor.

OSD Audio may replace returned speakers with a product of equal value and performance. In such cases, some modifications to the mounting may be necessary and are not OSD's responsibility. For this warranty to apply, the unit must be installed and used according to its written instructions. If necessary, repairs must be performed by OSD. The unit must be returned to OSD at the owner's expense and with prior written permission. Accidental damage and shipping damage are not considered defects, nor is damaged resulting from abuse or from servicing performed by an agency or person not specifically authorized in writing by OSD.

OSD Audio sells products only through authorized dealers and distributors to ensure that customers obtain proper support and service. Any OSD product purchased from an unauthorized dealer or other source, including retailers, mail over dealers and online sellers will not be honored or serviced under existing OSD warranty policy. Any sale of product by an unauthorized source or other manner not authorized by OSD shall void the warranty on the applicable product.

Damage to or destruction of components due to application of excessive power voids the warranty on those parts. In these cases, repairs will be made on the basis of the retail value of the parts and labor. To return for repairs, you must email customer service at [e-mail] for a Returned Merchandise Authorization (RMA) number# then the unit must be shipped to OSD at the owner's expense, along with a note explaining the nature of service required. Be sure to pack the speaker(s) in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in transit.

This Warranty Does Not Cover:

Damage caused by abuse, accident, misuse, negligence, or improper operation (installation) • Any products that have been altered or modified • Any product whose identifying number of decal, serial #, etc. has been altered, defaced or removed • Normal wear and maintenance.

Step 3: Wiring

Figure 5 Wiring Diagram

graph TD
    A["Amplifier/Receiver"] --> B["Input"]
    C["Right speaker"] --> B
    D["Left speaker"] --> B
    B --> E["Output"]
    style A fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#cfc,stroke:#333

Step 4: Install volume control in the enclosure

1) Place the volume control into the enclosure

2) Place the cover plate over the enclosure. Make sure the plastic rubber gasket is in place behind the cover plate

3) Place the control knob onto the volume control past

Technical Specifications

Audio Power Handling: 100 Watts Continuous (RMS)/300 Watts Maximum

Frequency Response: 20Hz - 20kHz

Total Attenuation: 42dB Maximum

Wiring requirement: 14 - 16 gauge wire, input and output (separate): two separate 2 - conductor speaker wires, or one 4 - conductor speaker wire.

Mounting: May be mounted on wall or via PVC conduit

Impedance Matching: 1/2X, 4X & 8X

Unit Dimensions: 3"W x 5½"H x 4"D

Control: Up to 2 speakers

Warranty: 5 Years