In an audio interface, the Preamplifiers comes before the amplifier. If you are not using a mixer, you should plug an audio cable into the output of the preamp and then connect it to the input of the amplifier. However, this is different if you are using a mixer. When both preamp and mixer are in the audio interface, you have to connect the preamp to the mixer input instead of 151the amplifier input. However, you shouldn’t use a preamp on the mixer if it already has an inbuilt preamp. Otherwise, it will be like connecting two preamps in series, and this will significantly distort the audio.If you are looking to buy preamplifiers online in the UAE, you are in the right place. There are more than 500 shops and brands offering preamplifiers on Shops.ae. These shops offer products (like Preamplifiers) from brands like McIntosh, NAD, Yamaha, Marantz, Parasound, Behringer, and Cambridge Audio.