RDL EZ-SX4X 4×1 Stereo Audio Switcher / Unbalanced RCA Inputs / Front Panel Volume Control

Description

The EZ-SX4X is a compact 4×1 stereo audio switcher that provides source selection and front-panel level control in a single chassis. It accepts four unbalanced stereo sources and presents a line-level output suitable for feeding power amplifiers or recording devices. The unit uses solid-state switching to maintain signal integrity during source changes.

Front-panel interlocking pushbuttons enable one-touch selection between inputs and a large level knob sets the line output level. Gold-plated RCA jacks on the rear panel ensure reliable connections and corrosion resistance. The solid-state design removes mechanical switching noise from the signal path and improves long-term reliability.

Audio performance is engineered for professional audio paths with a frequency response rated at 10 Hz to 20 kHz (±0.01 dB) and THD+N below 0.02%. Crosstalk is specified at less than -70 dB at 1 kHz and noise is below -80 dB referenced to -10 dBV. The level control provides up to +12 dB of gain and the output can reach up to +17 dBV maximum.

Connectivity is straightforward with four sets of stereo RCA inputs and a stereo RCA line output on the rear panel. The unit accepts nominal -10 dBV consumer-level sources and can handle signals up to +10 dBV on inputs. It is powered by a 24 Vdc supply and draws 30 mA idle and up to 60 mA maximum.

The EZ-SX4X is suited to retail audio, houses of worship, restaurants, clubs and compact home audio systems where simple source selection and a local volume control are required. The front-panel control allows staff or end users to select and set the level at the point of use. The short depth and 1/3-rack width make it easy to install in space-constrained racks or furniture.

Installation is simple with rear RCA terminations and a small external 24 Vdc power supply connection. The unit features a rugged metal case and full-size pushbuttons for reliable daily operation. Solid-state switching and gold-plated connectors contribute to long service life and consistent audio quality.