SquarePlug SP550-SBK Compact Pancake Right-Angle 1/4" TRS Stereo Cable Plug (Black)

Low-profile TRS connections for tight spaces

SquarePlug SP550-SBK is a compact, pancake-style right-angle 1/4-inch TRS cable plug in Black. It is listed for use with Mogami W2552, Mogami W2791, and RapcoHorizon MIC1.K, subject to checking the actual cable and assembly requirements. Its low-profile metal shell helps keep custom cable connections compact where a conventional plug would take up more space.

Three solder tabs provide separate tip, ring, and sleeve connections. This is a connector for building or repairing a cable, not a finished cable or an adapter. Sold individually.

Balanced mono or unbalanced stereo

A TRS plug can carry different signals depending on the equipment. For a conventional balanced mono connection, tip is hot (+), ring is cold (−), and sleeve is shield/ground. For conventional unbalanced stereo, tip is left, ring is right, and sleeve is the common return.

Insert, expression, and other control connections can use different assignments. Follow the equipment's wiring diagram at both ends. A TRS plug does not convert an unbalanced signal into a balanced one, and stereo TRS and balanced mono TRS connections are not interchangeable.

Choose the right cable

The specified cable outside-diameter range is 5.0–5.6 mm (approximately 0.20–0.22 inch). Check the exact cable version, conductor arrangement, insulation, solder-tab fit, and strain-relief engagement before assembly. Diameter alone does not establish electrical suitability.

Use an appropriate two-conductor shielded cable for conventional balanced mono or unbalanced stereo wiring. Do not substitute a single-center-conductor coaxial cable when the application requires two separately insulated signal conductors.

Assembly and clearance checks

Check the 17 mm-wide pancake shell against neighboring jacks, switches, and enclosure edges. Low profile does not guarantee clearance on every pedal, interface, or patchbay.

Solder the conductors to the correct tabs, keep shield strands clear of tip and ring, and position the insulation sheet correctly before closing the shell. The strain relief should secure the cable jacket without crushing it. Test continuity, pin assignments, and shorts before connecting equipment.

Finish options and straight plug

• SP550-SBK Black (this listing)
• SP550-S Matte Nickel
• For a straight TRS connection, see the SPS6-SBK Black. Its cable range and dimensions differ; check that listing before choosing.

Features

• Compact right-angle pancake design.
• Serviceable all-metal shell.
• Separate solder tabs for tip, ring, and sleeve.
• Jacket strain relief for correctly sized cable.
• Insulation sheet to help prevent contact with the metal shell.
• Optional colored screws for cable identification.

Specifications

• Model: SP550-SBK
• Connector: Male 1/4-inch TRS
• Orientation: Right angle
• Finish: Black body, cover, and screws
• Listed shell thickness: 0.32 inch (8.3 mm)
• Listed shell width: 0.67 inch (17 mm)
• Listed shell height: 1.10 inches (28 mm)
• Cable outside-diameter range: 5.0–5.6 mm (approximately 0.20–0.22 inch)
• Termination: Three solder tabs
• Strain relief: Yes
• Insulation sheet: Yes
• Color coding: Optional colored screws, sold separately
• Quantity: One connector