The KRAMER KR-4x4A is a unique Kramer tool featuring a high quality 4x1 stereo audio switcher coupled with a 1x4 distribution amplifier. Once you have selected the desired input source (four sources), the corresponding input is distributed to four outputs simultaneously. The KR-4X4A utilizes 3.5mm stereo mini connectors and has a level adjustment knob. 100 kHz bandwidth.