<p>The&nbsp;ES 3160-II CD-USB-Bluetooth/MP3 Digital Receiver Amplifier&nbsp;from&nbsp;RCF&nbsp;is a mixer-amplifier with 4 mic-line audio inputs on removable connectors (the first input also has an XLR socket), CD-USB/Bluetooth/MP3 player and tuner, and an aux input for an additional external music source. The amplifier&rsquo;s nominal power is 160W, available on either a low-impedance output (minimum 4 Ohms) or 100 or 70V constant voltage output (for loudspeakers having 100 or 70V transformers). Input 1 has a signal detection circuit (VOX) providing automatic priority operation.</p>
<p>All the four inputs can access the priority through an external command (connected to the removable connector). Inputs 2 and 3 also have an RJ45 socket for quick connection of an RCF BM 3001 paging microphone (through Cat5 cable). A USB port (on the front panel) allows connection of a USB flash drive containing MP3 files. Aux outputs are available to send the internal / external music source signals to additional amplifiers, mixers, phone systems (&lsquo;music on hold&rsquo; function), etc.</p>
<p>The 4 mic-line inputs have a common &lsquo;presence&rsquo; control and separate high-pass filters that are useful for improving speech intelligibility. Both the internal music source (CD/USB &ndash; MP3 player and tuner) and the aux input have separate tone controls. Front panel LEDs indicate the device state (ON, PROT), priority activation (PRIOR), and signal level (SIG/PK).</p>