Behind the Mic Building on the success of the original Baby Bottle, the SL model features refined sonics, a new streamlined build and versatile switches to capture the true character of your voice and bring classic mojo to acoustic guitars and other instruments. Baby Bottle SL is designed from top to bottom to inspire unforgettable performances. Inside the Sound The soul and swagger of Baby Bottle SL all starts with Blue’s proprietary, hand-tuned capsule. The robust, gold-sputtered Mylar diaphragm features a machined brass backplate design that creates the signature warmth and presence Baby Bottle SL is known for. And custom Class-A discreet circuitry makes it the quietest mic in its class. Flip the Switch Baby Bottle SL features a new switchable 100 Hz high-pass filter and -20dB pad to keep your sound pure regardless of vocal type, instrument or environment. Whether recording belting vocalists, loud guitar amps, drums and brass or capturing delicate vocals, strings or piano, Baby Bottle SL has the versatility to capture timeless tracks.