# Difference Between Power Plant Zones

**URL:** <https://forum.psaudio.com/t/difference-between-power-plant-zones/21729>\
**Category:** Power Components\
**Created:** [February 4, 2021, 7:21pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729 "2021-02-04T19:21:51Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![goblue](https://avatars.discourse-cdn.com/v4/letter/g/ecd19e/32.png) [@goblue](https://forum.psaudio.com/u/goblue)\
**Post date:** [February 4, 2021, 7:21pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/1 "2021-02-04T19:21:51Z")

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I have a P20. Is there some type of difference between each different zone. I understand the power up sequence is different for the two HC zones but are there any other differences. For example, is there some type of isolation between zones or are the zones there just so you can power cycle a group of components separately than another connected to a different zone?

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**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\
**Post date:** [February 4, 2021, 9:17pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/2 "2021-02-04T21:17:58Z")

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Early on I used to think it was important to keep components separate. Like digital sources in one zone, and then analog in the other. I later got with and he mentioned it’s not important with the new regenerators now. You don’t have to worry about noise from one source leaking into another. So at this point it’s more for separating the powering sequence if you’d like.

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**Author:** ![nikolay](https://avatars.discourse-cdn.com/v4/letter/n/a698b9/32.png) [@nikolay](https://forum.psaudio.com/u/nikolay)\
**Post date:** [February 4, 2021, 11:19pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/3 "2021-02-04T23:19:44Z")

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With the P5 it made a difference to place my receiver, projector, and amps on separate zones.

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**Author:** ![goblue](https://avatars.discourse-cdn.com/v4/letter/g/ecd19e/32.png) [@goblue](https://forum.psaudio.com/u/goblue)\
**Post date:** [February 5, 2021, 5:03am UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/4 "2021-02-05T05:03:01Z")

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Thanks James. Does this mean that there is some type of noise isolation between zones? Do you know if there is isolation between outlets within a zone?

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**Author:** ![MikeK](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/mikek/32/151810_2.png) [@MikeK](https://forum.psaudio.com/u/MikeK)\
**Post date:** [February 5, 2021, 5:30am UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/5 "2021-02-05T05:30:59Z")

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I thought the main use for Zones was to configure startup and shutdown delays. (In case you’ve not seen it before, this can be done on the ‘configuration’ page, accessible via the Power Plant’s browser interface.)

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**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\
**Post date:** [February 5, 2021, 4:05pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/6 "2021-02-05T16:05:56Z")

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A post from Paul a few years back.

> [@Powerplants and Intra-Component Noise](https://forum.psaudio.com/t/powerplants-and-intra-component-noise/5212/7):
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> Yes, you’re right, we had Isozones back then because we hadn’t yet figured out how to isolate one receptacle from another. In a modern P20 that’s all changed. Because of the wiring, now consisting on 1/4” thick gold plated copper bars, and the magnitude lower output impedance of the regenerator, it is no longer possible for attached equipment to place noise onto the Power Plant’s output. So noise from one receptacle is isolated from any other.

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**Author:** ![goblue](https://avatars.discourse-cdn.com/v4/letter/g/ecd19e/32.png) [@goblue](https://forum.psaudio.com/u/goblue)\
**Post date:** [February 5, 2021, 6:57pm UTC](https://forum.psaudio.com/t/difference-between-power-plant-zones/21729/7 "2021-02-05T18:57:38Z")

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Thanks James, you’re always a wealth of information. Paul’s response was exactly what I was trying to figure out.