Seetronic SCMM3-B Male 3-Pin XLR Connector
Reliable audio and control connections are essential across live events, theatre, touring, audiovisual production, film, television, broadcast and recording environments. The Seetronic SCMM3-B Male 3-Pin XLR Connector is designed for constructing, repairing and maintaining professional audio and compatible control cables.
Featuring a black-plated metal housing and silver-plated electrical contacts, the SCMM3-B combines a discreet professional appearance with a compact, serviceable cable-connector design. Its black finish is particularly useful around stages, studios, equipment racks and technical installations where bright or reflective connector bodies may be visually distracting.
The connector includes a latch-locking XLR interface, two cable clamps for different cable diameters and an integrated strain-relief arrangement designed to protect the cable near the connector exit. Seetronic specifies the SCMM3-B for more than 1,000 mating cycles, supporting repeated professional use when correctly assembled, handled and maintained.
Designed for Professional Audio Applications
Three-pin XLR connectors are widely used throughout professional audio systems for balanced analogue signal transmission. When assembled with suitable cable, the Seetronic SCMM3-B can be used to build or repair leads connecting microphones, mixing consoles, stage boxes, audio interfaces and other compatible equipment.
Suitable applications include:
- Professional microphone cables
- Mixing-console connections
- Stage boxes and audio multicores
- Audio interfaces
- Wireless microphone receivers
- Powered loudspeakers
- Signal processors
- Recording equipment
- Broadcast audio systems
- Theatre communications equipment
- Production playback systems
- Professional AV installations
The male connector is commonly fitted to the output end of a conventional balanced microphone cable. However, connector gender, wiring and signal direction should always follow the requirements of the equipment being connected.
The latch-locking interface helps the completed cable remain securely connected to a compatible female XLR connector or socket until the release mechanism is deliberately operated.
Black-Plated Metal Housing
The SCMM3-B features a zinc-alloy housing with a black-plated exterior. The metal shell provides mechanical protection for the contact insert and soldered cable terminations, while the black finish gives the connector a low-visibility appearance.
This discreet finish can be particularly useful throughout:
- Theatre stages
- Black-box performance spaces
- Concert touring systems
- Film and television studios
- Camera-facing production areas
- Broadcast facilities
- Equipment racks
- Conference and exhibition systems
- Recording studios
- Production warehouses
- Permanent venue installations
Black connector bodies can help technical cabling blend into black stage drapes, equipment racks, floor cable runs and other production infrastructure.
Seetronic also uses an internally threaded housing design intended to provide mechanical stability during routine handling, cable movement and professional production use.
Silver-Plated Contacts
The Seetronic SCMM3-B uses copper-alloy contacts with silver-plated contact surfaces. The manufacturer specifies contact resistance of no more than 3mΩ, initial insulation resistance greater than 10GΩ and capacitance between contacts of no more than 4pF.
Published electrical specifications include:
- Connection type: three-pin XLR
- Gender: male
- Rated current per contact: 16A
- Rated voltage: below 50V
- Contact resistance: no more than 3mΩ
- Capacitance between contacts: no more than 4pF
- Dielectric strength: 1.5kV DC
- Initial insulation resistance: greater than 10GΩ
- Maximum conductor size: 2.5mm² or 14 AWG
These specifications support professional low-voltage audio and compatible control applications when the connector is correctly assembled with appropriate cable.
The published current rating does not make the SCMM3-B suitable for AC mains power. It is an XLR signal connector and must not be substituted for a dedicated mains power connector.
Dual Cable Clamps for Different Cable Sizes
The SCMM3-B is supplied with two cable clamps to accommodate different cable outside diameters:
- Black cable clamp: 3.5mm to 6mm
- White cable clamp: 6mm to 8mm
This gives technicians flexibility when assembling the connector onto compact installation cable, microphone cable and larger flexible professional audio cable.
Selecting the correct cable clamp is important because the strain relief should grip the outer cable jacket securely without applying unnecessary pressure to the insulated conductors or solder joints.
Cable that is too small may move inside the connector, placing stress on the soldered connections. Cable that is too large may prevent the housing, clamp or boot from assembling correctly.
The cable itself should also be appropriate for the required signal type, shielding, flexibility, installation environment and expected frequency of handling.
Compact No-Ring Design
The SCMM3-B features a compact no-ring housing arrangement designed to reduce the connector’s overall footprint. This can be helpful in technical environments where several connectors are located close together or where available space is limited.
Potential applications include:
- High-density stage boxes
- Audio equipment racks
- Broadcast patching systems
- Touring cable looms
- Custom installation panels
- Audio fly racks
- Studio wiring
- Theatre technical systems
- AV equipment packages
- Production workshop cable builds
The streamlined design also reduces the number of separate external parts that technicians need to manage during cable assembly.
Enough clearance should still be provided around the completed connection for the release latch to be operated and for the cable to exit without sharp bending.
Cable-Bend Protection and Strain Relief
The connector boot incorporates a polyurethane sealing sleeve designed to reduce bending pressure where the cable exits the connector. This is a common wear point on microphone and production audio cables, particularly where leads are repeatedly coiled, transported and deployed.
Effective strain relief can help reduce:
- Movement at conductor solder joints
- Damage to the cable jacket
- Sharp bending near the connector
- Stress caused during cable coiling
- Damage from repeated setup and pack-down
- Premature cable failure
- Intermittent signal faults
The polyurethane sleeve provides cable-bend protection but does not make the connector waterproof.
Professional leads should still be coiled correctly, protected during transport and inspected regularly for loose housings, damaged cable jackets, worn strain-relief components or intermittent connections.
Built for Theatre, Touring and Live Events
Professional XLR cables may be connected, disconnected, coiled and transported hundreds of times throughout their working life. Seetronic specifies a service life exceeding 1,000 mating cycles, with insertion and withdrawal forces of no more than 20N.
The SCMM3-B is suitable for cable inventories used by:
- Theatre companies
- Concert touring productions
- Audio hire suppliers
- Festival production teams
- Performance venues
- Schools and performing arts centres
- Conference centres
- AV production companies
- Recording studios
- Production workshops
Its black metal body is well suited to live production environments where connectors should remain visually discreet around stages and performance areas.
The connector should still be inspected regularly for damaged latches, loose housings, bent contacts, worn plating, cable movement, contamination or damaged strain-relief components.
Designed for Film, Television and Broadcast Environments
Film, television and broadcast departments use three-pin XLR connections throughout location sound, studio audio, communications, playback and monitoring systems.
The SCMM3-B may be used in suitable cable assemblies supporting:
- Location sound recording
- Studio microphones
- Production audio systems
- Broadcast mixing consoles
- Audio interfaces
- Wireless microphone receivers
- Playback equipment
- Intercom and communications systems
- Control-room installations
- Production-monitor systems
- Outside-broadcast equipment
- Mobile production racks
The black body can be particularly useful on sets, studio floors and camera-facing production areas where reflective chrome connectors may be undesirable.
Its compact format also makes it suitable for sound bags, equipment cases, mobile racks and production workboxes where efficient use of space is important.
Suitable for Compatible Three-Pin DMX Systems
The SCMM3-B may also be incorporated into cables for lighting-control equipment that specifically uses a three-pin XLR connection. The GigLife listing identifies professional audio signal distribution and DMX lighting-control systems among its intended applications.
Potential uses include:
- Compatible three-pin DMX lighting fixtures
- Lighting-control interfaces
- Small theatre lighting systems
- Architectural lighting controls
- School production systems
- Compatible fog, haze and effects equipment
The cable should have the correct impedance and electrical construction for DMX data transmission. Technicians should not assume that every ordinary microphone cable is suitable for control data simply because the connectors are physically compatible.
Completed DMX cables should be clearly labelled to distinguish them from audio leads. Clear identification helps reduce incorrect patching during theatre productions, festivals, touring bump-ins and studio setups.
Indoor IP40 Protection
The Seetronic SCMM3-B carries an IP40 protection classification and is intended for indoor or otherwise protected professional environments. It is not an outdoor waterproof XLR connector.
Suitable protected environments include:
- Indoor theatres
- Recording studios
- Broadcast facilities
- Equipment racks
- Conference centres
- Exhibition halls
- Production workshops
- Indoor concert venues
- Film and television studios
- Protected technical areas
For exposed outdoor events, wet locations or installations where connectors may encounter rain or significant moisture, an appropriately rated weather-resistant XLR connector should be selected.
Seetronic specifies an operating-temperature range of -30°C to +80°C, although the completed cable assembly must also remain within the operating limits of the cable and connected equipment.
Professional Cable Assembly
The SCMM3-B is designed for solder termination and accepts conductors up to 2.5mm² or 14 AWG. The manufacturer lists its solderability as compliant with IEC 68-2-20.
Correct cable assembly should include:
- Sliding the connector boot and cable clamp onto the cable before soldering
- Carefully stripping the outer cable jacket
- Preserving the cable shield
- Preparing the conductors to the correct length
- Following the required pin configuration
- Creating clean and mechanically secure solder joints
- Preventing loose strands or exposed conductors
- Selecting the correct cable clamp
- Securing the connector housing
- Checking that the strain relief grips the outer jacket
Before entering service, the completed cable should be tested for continuity, correct pin wiring, short circuits and shielding integrity.
For conventional balanced analogue audio, the commonly used arrangement is pin 1 for shield or ground, pin 2 for positive or hot and pin 3 for negative or cold. The requirements of the connected equipment should always take priority.
Colour-Coded Boots for Cable Identification
Seetronic offers compatible replacement boots in multiple colours, including red, orange, yellow, green, blue, grey, brown, black, white and purple. These can support cable identification and inventory management across venues, touring productions and technical departments.
Colour coding may be used to identify:
- Cable lengths
- Different stages
- Audio departments
- Signal types
- Equipment owners
- Touring packages
- Tested cable groups
- Venue inventory
- Production destinations
- Separate technical systems
There is no universal industry meaning assigned to every boot colour, so each organisation’s colour-coding system should be documented and communicated to the crew.
Why Buy the Seetronic SCMM3-B from GigLife?
GigLife supplies professional connectors and production consumables backed by more than 25 years of hands-on live entertainment industry experience.
Our products are selected by people who understand the practical requirements faced by audio engineers, production managers, technical managers, stage crews, audiovisual technicians, film and television departments, venues and touring professionals.
Alongside the Seetronic SCMM3-B Male 3-Pin XLR Connector, GigLife stocks matching female XLR connectors, chrome-body alternatives, five-pin XLR connectors, locking power connectors, loudspeaker connectors, adaptors, professional cables and cable-building accessories.
Orders are dispatched from Brisbane, with Australia-wide shipping available for:
- Production companies
- Theatres and performance venues
- Film and television crews
- Broadcast facilities
- AV suppliers
- Schools and performing arts centres
- Conference centres
- Exhibition contractors
- Festivals
- Touring productions
GigLife is proudly by the professionals… for the professionals.
