SquarePlug old 1

SquarePlug SP400 [SP500] is what we believe the 1/4” ‘pancake-type’ connector introduced by Switchcraft some 50 years ago under the designation 228, should look like in 2017. With today’s trend towards more compact, all-in-one integrated systems, a smaller and more functional version of the Switchcraft 228 was needed. We took on the challenge of redesigning the S228 in every detail and we came up with the smallest solder type 1/4” right angle connector created to date. SP400 [SP500] is not only thinner than its counterparts, soldered and solderless alike, but is also narrower and shorter, which makes it the only soldered connector on the market to work with many switchers/controllers with close jack spacing.

SquarePlug SPS4 [SPS5]: the smallest soldered 1/4″ straight connector with strain relief created to date! SPS4 [SPS5] has been designed with the same idea in mind as for the SP400 [500] series, that is, create the least obtrusive, yet full-featured straight 1/4″ jack. A two-screw cable clamping solution sets the SPS4 [SPS5] apart from its counterparts, as it yields a much more effective strain relief action compared to what the traditional cable clamping way provides. Those screws, when replaced by a set of optional anodized screws [scroll down], provide a unique and innovative means to trace/ID audio cables whether they’re terminated by the SP400/500’s, SPS4/5’s or both.

EU PATENT No. 003074582-000 | US PATENT No. 808.838 | EU PATENT No. 004063857-0001/0002 | US PATENT No. 847.122


SquarePlug SP400, world’s smallest right angle mono [TS] solder-type 1/4”/6.35mm plug | 8.3mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 4.6mm OD



SquarePlug SP500, world’s smallest right angle mono [TS] solder-type 1/4”/6.35mm plug | 8.3mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 5.6mm OD



SquarePlug SPS4, world’s smallest straight mono [TS] solder-type 1/4”/6.35mm plug with strain relief | 13mm [body diameter] x 21mm [body length] | fits cables up to 4.8mm OD



SquarePlug SPS5, world’s smallest straight mono [TS] solder-type 1/4”/6.35mm plug with strain relief | 13mm [body diameter] x 21mm [body length] | fits cables up to 5.8mm OD



SquarePlug SP400BK, all-black variant [top cover and body] of the SP400 | 8.3mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 4.6mm OD



SquarePlug SP500BK, all-black version [top cover and body] of the SP500 | 8.3mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 5.6mm OD



SquarePlug SPS4BK, black version of the SPS4 | 13mm [body diameter] x 21mm [body length] | fits cables up to 4.8mm OD



SquarePlug SPS5BK, black version of the SPS5 | 13mm [body diameter] x 21mm [body length] | fits cables up to 5.8mm OD



SquarePlug SP550-S, world’s smallest right angle stereo [TRS] solder-type 1/4”/6.35mm plug | 8.9mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 6.0mm OD



SquarePlug SP550-SBK, all-black variant [top cover and body] of the SP550-S | 8.9mm [body thickness] x 17mm [body width] x 28mm [body length] | fits cables up to 6mm OD



Example of a low profile [literally and figuratively] patch cable terminated with an SPS4BK and an SP400BK



Size comparison between various soldered and solderless connectors: [from left to right] George L’s, Switchcraft 228, Free the tone, G&H, Lava and SquarePlug SP400


Optional anodized screws for color coding/cable ID and tracing purpose. Fit on all right angle and straight SquarePlug connectors [from left to right: black, titanium, silver, red, orange, yellow, green, blue, purple and pink]