In order to tell whether or not your receiver can be used as a preamp, turn the unit around and look for jumpers on the rear of the unit that connect the Main In and Pre Out inputs (see below photo for example). Not all vintage integrated receivers can be used as a preamp. The volume control and input selection can be controlled on the receiver while it also powers speakers to output sound. How do I know if my vintage receiver can be used as a preamp?įirst, it’s important to understand that an integrated amplifier simply means the receiver contains a preamp and an amplifier in one box.
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However, if you want to use your integrated receiver as an amplifier only and hook up a separate preamp, you can do so by connecting the RCA cables on your preamp out into the Main In inputs on the rear of your receiver.īut first, before I show you how to connect components, we need to first decide if your vintage receiver can have the preamp and amp isolated for separate use in your audio system. The article below explains how to connect the receiver as a preamp to an amplifier. I recently had two friends have the same issue with their Marantz receivers so I thought it would be helpful to write an article explaining how to separate the preamp and amplifier in a vintage receiver. This set up has been great to listen to and will suffice until I can rebuild the Marantz amp boards. I decided it would be an interesting experiment to use the Marantz 2270 as a preamp only and hook it up to an Emotiva BASX A-100 amplifier. Marantz 22XX units have a history of failing amp boards and my unit was having the same issue. At first, I thought it might be the phono board which often needs repair, but the issue was constant on all inputs. I used it for several years before noticing the sound dropping out on the left speaker. My first vintage receiver purchase included a Marantz 2270. Power on the receiver first, then the amplifier and use the volume control on the receiver to adjust volume as needed.Connect the RCA cables from the receiver to the Input RCA inputs on the rear of the amplifier.Next, look at the rear of the amplifier and locate the Input RCA inputs.Plug RCA cables into the Pre Out input on the receiver with the red cable in the Right input and the white cable into the Left input.Remove the jumpers from the inputs on the receiver and store them in a safe location.Locate the Main In and Pre Out inputs with jumpers on the rear of the vintage receiver.Connecting an integrated receiver’s preamp to an amplifier only requires connecting a pair of RCA cables to the correct inputs (read further below for photos): My Marantz 2270 and Emotiva BASX A-100 amplifier. A step by step guide on how to connect the preamp in a vintage integrated amplifier to an external amplifier, using photos taken from a Marantz 2270 receiver and Emotiva BASX A-100 amplifier.
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