In this video, we will be explaining what is the function of the pre out port on AV receivers and how to use it effectively for your home theatre setup.
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A pre-out or preamplifier output on AV receivers allows you to connect an external amplifier to power your speakers. This can help provide more power and improve the overall sound quality. Please watch till the end as we cover this topic in detail. And don't forget to subscribe and click the bell icon to stay updated.
Now, most modern mid-range and high-end AV receivers come equipped with pre-outs. This is an analogue audio output that sends unamplified line-level signals from the AV receiver to external amplifiers.
The key benefit of using pre out is that it allows you to use a more powerful external amplifier to drive your speakers. The built-in amplifiers in AV receivers, often don't provide enough juice to properly drive high-end or power-hungry speakers.
Connecting an external power amp to the pre-outs gives you more amplification power for better sound across all frequency ranges - improved bass impact, clearer midrange, and crisp highs.
For instance, you can connect a 2-channel amplifier to the front left and right pre-outs to bi-amp your front speakers. Or you can use a multi-channel external amp to power your entire surround sound speaker system.
Another common use of preamplifier outputs on AV receivers is for powering a subwoofer. Nearly all home theatre receivers have a dedicated subwoofer pre out port.
This allows you to connect a powered subwoofer directly to the AV receiver and amplify the low frequency LFE channel independently. Having a separate amplification just for the subwoofer ensures you get that tight, authoritative bass.
Now coming to the connections - most AV receivers will have pre-outs for front left and right channels at the minimum. Many mid-range and high-end models will also add pre-outs for other channels - centre, surround left/right, and even height channels for Dolby Atmos.
The type of connector may vary - RCA, XLR, etc. - based on the quality of the AV receiver. The audio output from all the pre-out ports will be unamplified line-level signals.
You simply need to connect these pre-out ports from the AV receiver to the analogue audio input ports on your external power amplifier using appropriate cables.
That said, there are a few things to keep in mind when using pre outs to avoid any issues:
- Turn off the speaker assignments for the channels you are connecting external amps to. The AV receiver should be configured to send pre-out signals only.
- Match the impedance of your speakers and external amp to avoid damage.
- Use good quality connecting cables to prevent signal loss.
- Set the volume on the power amp accordingly to avoid distortion.
- You may need to re-run room correction after adding external amps.
So in summary, pre-out connections in AV receivers allow you to deliver more power to your speakers by adding external amplifiers in your setup. This helps improve sound quality and volume across various channels including subs.
If you have high-impedance speakers or simply want louder, distortion-free sound, then an AV receiver with pre outs is a great choice.
At Ooberpad, we recommend choosing receivers that have pre-outs for at least the front L/R and subwoofer channel if you have mid to high end speakers. Popular options are Marantz SR5015, and Yamaha RX-A2A.
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I hope this video gives you an insight understanding of what pre-out ports are, their functionality, and how you can use them effectively in your home theatre. If you need help choosing an AV receiver or amplifiers for your setup, please reach out to us.
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