Sigma

Signalflex

Silvio Marotta

Singular Sound

Skb

Skreddy Pedals

Slingerland

Slug

Snark

Sonor

Souldier

Source Audio

Sovtek

Sperzel

Sprague

Squier

St Audio

Stagg

Stentor

STMicroelectros

String Swing

Strymon

Sunn

Super Sensitive

Superior

Superslick

Switchcraft

SWR

Tackle

Takamine

Tama

Taylor

TC Electronic

TC Helicon

TE Connectivity

Tesla/JJ

Thomastik

TML

Toad Works

Toca

Tokai

Tom Anderson

Tone

Tone Pros

Tourtek

Trace Elliot

Trick

Trick Drums

Trinity College

Trophy

TrueTone

Try Publishing

Tube Works

Tung-Sol

Ultimate Suppor

Ultra

Union Station Straps

Unknown

Vandoren

Vater