# PowerPlant THD In **URL:** \ **Category:** Power Components\ **Created:** [September 4, 2021, 11:18am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219 "2021-09-04T11:18:00Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![ChrisTea](https://avatars.discourse-cdn.com/v4/letter/c/58956e/32.png) [@ChrisTea](https://forum.psaudio.com/u/ChrisTea)\ **Post date:** [September 4, 2021, 11:18am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/1 "2021-09-04T11:18:00Z")
Hi, I am owning a PowerPlant 15 and I am wondering what would be considered a “normal” or average THD in value. In the past I used to have ~4%, I then installed a new cable directly to the breaker box with better isolation and less gauge / bigger diameter and I am now between 1.5-3% depending on the time of the day. The PP does its job and THD out is great but I was just wondering whether I have a particular high or low THD compared to other people… Thanks! Chris ---
**Author:** ![timm](https://avatars.discourse-cdn.com/v4/letter/t/8e8cbc/32.png) [@timm](https://forum.psaudio.com/u/timm)\ **Post date:** [September 4, 2021, 11:51am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/2 "2021-09-04T11:51:34Z")
Well mine is 1% and I wondered if I really needed it when I hear of people like yourself that were around 4% …. I will say I think I get more consistent sound w my p10 no matter what time of day I am listening. ---
**Author:** ![roninaudio](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/roninaudio/32/262996_2.png) [@roninaudio](https://forum.psaudio.com/u/roninaudio)\ **Post date:** [September 4, 2021, 12:04pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/3 "2021-09-04T12:04:43Z")
I hope to make a similar evaluation. I currently show a bit over 2% THD. In the next month or so I’ll have a dedicated 20A line. Seems odd to run the 20A line to a P12 which can only do 1/2 that or less power wise. However, that is “clean” power and my system at deafening levels peaks the P12 at about 61%. If my dedicated line THD is low (say 1%) I may look at running sources only into the P12 and amp into wall. And/or really looking at the benefits of the P12 vs Niagara etc. I may notice something like timm mentioned above. ---
**Author:** ![tarheelneil](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/tarheelneil/32/90619_2.png) [@tarheelneil](https://forum.psaudio.com/u/tarheelneil)\ **Post date:** [September 4, 2021, 1:01pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/4 "2021-09-04T13:01:58Z")
I’m 18 miles NE of Baltimore, MD, and mine is an average of 4% in. ---
**Author:** ![Baldy](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/baldy/32/223847_2.png) [@Baldy](https://forum.psaudio.com/u/Baldy)\ **Post date:** [September 4, 2021, 1:40pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/5 "2021-09-04T13:40:51Z")
THD in is running between 3.5% and 4% lately although it has been as high as 7% last winter. Southwest lower Michigan. ---
**Author:** ![WATChad](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/watchad/32/47483_2.png) [@WATChad](https://forum.psaudio.com/u/WATChad)\ **Post date:** [September 4, 2021, 1:51pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/6 "2021-09-04T13:51:16Z")
4% in my 19th century Denver house. ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [September 4, 2021, 3:00pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/7 "2021-09-04T15:00:50Z")
Probably about average with regards to what I’ve seen here on the forum. My incoming thd has varied from 2% to 6%. My P15 corrects all that and outputs 0.1%…For now my I do not have dedicated power lines…one day hopefully. Best wishes ---
**Author:** ![jomal](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jomal/32/62773_2.png) [@jomal](https://forum.psaudio.com/u/jomal)\ **Post date:** [September 4, 2021, 9:56pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/8 "2021-09-04T21:56:50Z")
My incoming THD varies from 3% to 4%. After P15 the output THD is never greater than 0.1%. I also don’t have a dedicated line / phase to my audio system and I don’t plan to have one in a near future since I got the P15. ---
**Author:** ![calord](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/calord/32/225353_2.png) [@calord](https://forum.psaudio.com/u/calord)\ **Post date:** [September 4, 2021, 10:03pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/9 "2021-09-04T22:03:08Z")
I’m in residential Boulder, CO and I do not have a dedicated AC line to my kit. I regularly have 5-7.5% incoming THD. My P5 consistently outputs just .1-.2% THD and corrects a wildly variable incoming voltage to 120.0V. I also have photo voltaic via a power inverter which may be contributing to my situation. ---
**Author:** ![netspecht-2](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/netspecht-2/32/132_2.png) [@netspecht-2](https://forum.psaudio.com/u/netspecht-2)\ **Post date:** [September 5, 2021, 3:35am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/10 "2021-09-05T03:35:08Z")
SoCal - P5 and P12. THD from wall runs at 2% or a little under. Usually corrects to 0.1% THD. ---
**Author:** ![falling\_leaves](https://avatars.discourse-cdn.com/v4/letter/f/a9adbd/32.png) [@falling\_leaves](https://forum.psaudio.com/u/falling_leaves)\ **Post date:** [September 5, 2021, 3:54am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/11 "2021-09-05T03:54:26Z")
SoCal, I basically have consistent 5% thd in all the time. Some time I see 4.x but rarely ---
**Author:** ![netspecht-2](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/netspecht-2/32/132_2.png) [@netspecht-2](https://forum.psaudio.com/u/netspecht-2)\ **Post date:** [September 5, 2021, 4:08am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/12 "2021-09-05T04:08:08Z")
Do you have SCE? 5% seems high. ---
**Author:** ![falling\_leaves](https://avatars.discourse-cdn.com/v4/letter/f/a9adbd/32.png) [@falling\_leaves](https://forum.psaudio.com/u/falling_leaves)\ **Post date:** [September 5, 2021, 4:45am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/13 "2021-09-05T04:45:26Z")
I have SCE, and this is a dedicated circuit too. It was the same before I put in the circuit so, nothing changes. ---
**Author:** ![netspecht-2](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/netspecht-2/32/132_2.png) [@netspecht-2](https://forum.psaudio.com/u/netspecht-2)\ **Post date:** [September 5, 2021, 5:09am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/14 "2021-09-05T05:09:02Z")
![image](https://us1.discourse-cdn.com/flex015/uploads/psaudio/original/3X/e/6/e66d11bdc2d29de372c849df35c24da958bbf9a8.png) I’m in RivCo south of Riverside. ---
**Author:** ![adifferentpaul](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/adifferentpaul/32/282181_2.png) [@adifferentpaul](https://forum.psaudio.com/u/adifferentpaul)\ **Post date:** [September 5, 2021, 6:22am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/15 "2021-09-05T06:22:06Z")
Mine is also at 1% incoming, and I found the same thing with day/night sound being the same after getting a P12. ---
**Author:** ![Loh](https://avatars.discourse-cdn.com/v4/letter/l/b2d939/32.png) [@Loh](https://forum.psaudio.com/u/Loh)\ **Post date:** [September 5, 2021, 6:45am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/16 "2021-09-05T06:45:44Z")
My apartment have 2% THD IN. ---
**Author:** ![ChrisTea](https://avatars.discourse-cdn.com/v4/letter/c/58956e/32.png) [@ChrisTea](https://forum.psaudio.com/u/ChrisTea)\ **Post date:** [September 5, 2021, 2:20pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/17 "2021-09-05T14:20:57Z")
ok cool, thanks. Very interesting to see the numbers varying from different locations… ---
**Author:** ![Peter\_B](https://avatars.discourse-cdn.com/v4/letter/p/85f322/32.png) [@Peter\_B](https://forum.psaudio.com/u/Peter_B)\ **Post date:** [September 5, 2021, 8:36pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/18 "2021-09-05T20:36:00Z")
My P10 in The Netherlands indicates 1,2% in and 0,1% out. ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [September 5, 2021, 11:57pm UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/19 "2021-09-05T23:57:28Z")
That’s really good best I have seen yet!! ---
**Author:** ![lonson](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/lonson/32/249792_2.png) [@lonson](https://forum.psaudio.com/u/lonson)\ **Post date:** [September 6, 2021, 6:56am UTC](https://forum.psaudio.com/t/powerplant-thd-in/25219/20 "2021-09-06T06:56:35Z")
When I lived in Austin my incoming was about 5% but now that I live out in a wooded neighborhood directrly across a narrow road from a state wildlife preserve my incoming is 1.5 to 2%. Still amazed at the improvements the regenerators make!