Samson Stage 412 Quad-Channel Wireless System

Important Safety Information

CAUTION: ⚠️ [Risk of Electric Shock - Do Not Open]

ATTENTION: RISQUE DE CHOC ÉLECTRONIQUE - NE PAS OUVRIR

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of non-insulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the appliance.

WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK) AS THERE ARE NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

Disposal Instructions: Do not mix this product with general household waste. Utilize a separate collection system for used electronic products in accordance with legislation requiring proper treatment, recovery, and recycling. Private households in the EU (28 member states), Switzerland, and Norway may return used electronic products free of charge to designated collection facilities or retailers. For other countries, contact local authorities for correct disposal methods to prevent negative environmental and human health effects.

FCC Rules and Regulations: Samson wireless receivers are certified under FCC Rules part 15 and transmitters under FCC Rules part 74. Licensing is the user's responsibility. This equipment has been tested and found to comply with Class B digital device limits (FCC Part 15) for reasonable protection against harmful interference. It generates, uses, and radiates radio frequency energy. If it causes harmful interference to radio or television reception, users are encouraged to correct it by reorienting/relocating the antenna, increasing separation, connecting to a different circuit, or consulting a dealer/technician. The device meets general RF exposure requirements and should be installed/operated with a minimum 20cm distance from the body. Unauthorized modifications can void the user's authority to operate the equipment. This radio transmitter is approved by Industry Canada to operate with specified antenna types. It complies with Part 15 of FCC rules and Industry Canada license-exempt RSS standards, subject to two conditions: (1) it may not cause harmful interference, and (2) it must accept any interference received. WARNING: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

General Safety Precautions:

• Read and keep these instructions.
• Heed all warnings and follow all instructions.
• Do not use near water.
• Clean only with a dry cloth.
• Do not block ventilation openings; install per manufacturer's instructions.
• Do not install near heat sources.
• Do not defeat the safety purpose of polarized or grounding plugs. Consult an electrician for outlet replacement if the plug does not fit.
• Protect the power cord from being walked on or pinched.
• Only use manufacturer-specified attachments/accessories.
• Use only with specified carts, stands, tripods, brackets, or tables; use caution with carts to avoid tip-over.
• Unplug during lightning storms or when unused for long periods.
• Refer all servicing to qualified personnel. Service is required for damage, liquid spills, exposure to rain/moisture, abnormal operation, or drops.
• Appliance shall not be exposed to dripping or splashing water; no liquid-filled objects should be placed on it.
• To prevent electrical shock, match wide blade plug to wide slot and insert fully.
• Maintain good ventilation around the unit.
• The direct plug-in adapter serves as the disconnect device and must remain operable.
• Batteries shall not be exposed to excessive heat.
• The AC plug is considered the adapter's disconnect device.

Introduction

Congratulations on purchasing the Samson Stage 412 Quad Microphone Wireless System! The Stage 412 system is an ideal solution for any application requiring four high-quality, wireless microphones in an easy-to-use package. With simple operation, 12 available channels, and infrared channel setting for transmitters, the Stage 412 is quick to set up. The system includes the SR412 Quad channel receiver with individual and mixed outputs, and four VH12 handheld microphone transmitters.

The Stage 412 system delivers great sound quality with clear reception, allowing users to move freely. It is suitable for live sound applications such as karaoke, presentations, education, and house of worship, providing outstanding performance and reliability for quad-performer needs.

While designed for intuitive operation, this manual provides detailed instructions for setup and unique features. For users in the United States, a warranty card is included; follow its instructions for online technical support and updated information. Visit the Samson website (www.samsontech.com) for complete product line information.

Please record your serial number and date of purchase below for future reference.

Serial number: _______________________________

Date of purchase: ____________________________

For questions or comments regarding the Stage 412 Wireless System or other Samson products, contact support@samsontech.com.

With proper care, the Stage 412 will operate trouble-free for many years. For servicing, a Return Authorization (RA) number must be obtained from www.samsontech.com/ra before shipping. Retain original packing materials for returns. For purchases outside the United States, contact your local distributor for warranty and service information.

Features

• Professional, Quad-handheld wireless system for live sound and sound contracting applications.
• 6 available frequencies per receiver channel operating in the VHF band for maximum compatibility without interference.
• Individual receiver (4) 1/4" unbalanced outputs, mixed pair (2) XLR outputs, and all receivers mixed XLR outputs.
• Up to 200' (60m) of line-of-sight operating range.
• Four professional VH12 handheld transmitters with Q6 Dynamic Microphone capsules.
• Up to 10 hours of battery life using two standard AA batteries.

SR412 Receiver Front Panel Features

The front panel of the SR412 receiver provides access to essential controls and indicators for system operation.

Diagram Description: The front panel shows multiple controls and indicators labeled 1 through 8. These include channel displays, volume knobs, buttons, and indicator lights for RF and AF signals, arranged across four receiver channels (A, B, C, D).

1. Power Switch: Press to turn the receiver on or off.
2. IR Transmitter: An infrared light used to set the transmitter channel during an "IR SET" operation.
3. Channel SELECT Buttons: Cycle through each receiver's operating channels (1-6). Press and hold to send channel information to the transmitter via infrared transmission.
4. LED Displays: 7-segment LED displays showing each receiver's current operating channel (1-6).
5. Volume Controls: Knobs to set the audio signal output level for each receiver. Full clockwise is "10" for reference level.
6. AF Indicators: Green light indicates an audio signal is present and detected; red light indicates the transmitted audio signal is overloaded.
7. RF Indicators: Orange light indicates the transmitter is powered on and an RF signal is present and detected.
8. Channel Labels: Designate the frequency group, with label colors matching those on the transmitter.

SR412 Receiver Rear Panel Features

The rear panel of the SR412 receiver houses the main audio output connections, power input, and antenna mounts.

Diagram Description: The rear panel features antenna mounting posts, a DC power input jack, several unbalanced 1/4" output jacks for individual channels, and balanced XLR output jacks for mixed audio signals.

1. Antenna: Mountings allow full rotation for optimal placement. Antennas should be vertical for normal operation and can be folded down for transport.
2. POWER DC IN: Connect the supplied 15-volt adapter here. WARNING: Do not substitute other power adapters, as this can cause damage and void the warranty.
3. Unbalanced Outputs: Unbalanced, 1/4" jacks for connecting individual SR412 receivers to line-level inputs of mixers, amplifiers, or other audio equipment.
4. CHANNELS A & B Mixed Output: Balanced, low impedance XLR jack carrying a mix of Channel A and Channel B receivers.
5. CHANNELS C & D Mixed Output: Balanced, low impedance XLR jack carrying a mix of Channel C and Channel D receivers.
6. MIXED OUT ALL CHANNELS: Balanced, low impedance XLR jack carrying a mix of all four receivers.

VH12 Transmitter Controls and Features

The VH12 handheld transmitter features controls for power, muting, gain, and channel synchronization.

Diagram Description: The handheld transmitter shows a status indicator LED, a power/mute switch, a battery compartment cover, a battery holder, an input gain control, and an IR lens window. A small plastic screwdriver is also depicted.

1. Status Indicator: LED displays operation mode: GREEN (Normal Operation), RED (Mute), Flashing GREEN (Low Battery).
2. Power/Mute Switch: Press and hold to turn the unit on/off. Press and release to mute or unmute the transmitter.
3. Battery Cover: Unscrew and slide down to access the battery compartment.
4. Battery Holder: Holds two standard AA (LR6) batteries. Observe polarity markings. WARNING: Inserting batteries backwards can cause severe damage and void the warranty.
5. Input GAIN Control: Adjusts transmitter input sensitivity. Set using the included screwdriver to the point where the PEAK indicator lights under high levels, then turn down until the PEAK light stops lighting for optimal performance.
6. IR Lens: Window used to capture the infrared signal from the transmitter for channel synchronization with the receiver. Battery cover must be open, and IR Lens must face the receiver.
7. Plastic Screwdriver: Used for adjusting the Input GAIN control.

Quick Start

Follow these steps to set up and use your Stage 412 wireless system:

1. Receiver Placement: Place the SR412 receiver where it will be used. Extend antennas vertically. Maintain "line of sight" between the receiver and transmitter.
2. Power Connection: With the SR412 powered off, connect the included power adapter. Turn the SR412 on momentarily to confirm power (LED displays should light up), then turn it off.
3. Audio Connections: With your amplifier or mixer off and volume down, connect the SR412 receiver's XLR Mix Outputs or 1/4" outputs to the mixer/amplifier inputs. Turn the SR412 Level knob fully counterclockwise, then turn on its power.
4. Transmitter Setup: With the transmitter powered off, install two fresh AA batteries into the VH12 transmitter, leaving the battery compartment open. Turn on the transmitter; the indicator LED should light green.
5. Channel Selection: Press the CH A SELECT button on the SR412 receiver to choose an available channel (1-6). The channel number will increment.
6. IR Synchronization: Position the VH12 transmitter 6-12 inches (15-30 cm) from the SR412 receiver, with the transmitter's IR window facing the receiver's IR transmitter. Press and hold the SR412 CH A SELECT button to send the channel information via infrared.
7. Confirmation: The SR412 will receive the RF signal and tone-key. The CH A READY indicator will light. Repeat these steps for the remaining transmitters and receivers. Available frequency channels do not overlap, allowing multiple receivers to be set to the same channel number if needed.
8. Final Setup: Turn on your connected amplifier or mixer with volume still down. Set the SR412 Volume knob to "10" (unity gain). Speak or sing into the microphone and slowly raise the amplifier/mixer volume until the desired level is reached.
9. Troubleshooting: If experiencing dropouts, reduced range, or noise, change the operating channel. When using multiple systems in the same frequency band, ensure each system is set to a different operating channel.

Specifications

System Specifications

SR412 Receiver Specifications

VH12 Transmitter Specifications

Specifications and images are subject to change without notice as Samson continually improves its products.

All About Squelch

Squelch circuitry silences the audio output of the receiver when the desired RF signal is absent. Without it, receivers might output noise or unwanted signals when the RF signal is lost (due to dropout, distance, or transmitter being off). This is related to the "capture effect," where an FM receiver seeks the strongest signal.

Wireless systems use several squelch circuit types:

• Carrier Squelch: Sets an RF signal threshold; audio is muted when signals drop below it.
• Noise Squelch: Compares incoming RF signal to a reference voltage (e.g., 200 kHz) to distinguish valid signals from radio noise, muting output when noise is detected.
• Tone Squelch (Tone-Key/Tone-Code): The Stage 412 system uses this method. Transmitters add a supersonic tone to audio signals; receivers only pass audio signals containing this tone.

Troubleshooting