High Pass Filter Question
Printed From: Graham Slee Hifi System Components
Category: And the rest
Forum Name: Audio System Set-Up
Forum Description: Discussions about getting the best from your system (Digital section now moved)
URL: https://www.hifisystemcomponents.com/forum/forum_posts.asp?TID=5644
Printed Date: 27 Mar 2026 at 12:14am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: High Pass Filter Question
Posted By: Mikeh
Subject: High Pass Filter Question
Date Posted: 13 Aug 2023 at 8:52am
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My system has the Majestic balanced output feeding Proprius amps connected to Harbeth P3s and I had Jon modify the phono output to variable so that this feeds a pair of REL subs. There is a Minidsp in the line to the subs which has allowed me to integrate the subs using REW software measurements. It sounds great to me. I'm trying to get my head around whether there is any benefit from trying to introduce a high pass filter infront of the Proprious. Measurements of the P3s show they drop off completely below 90Hz. So if the Proprious are amplifying full range input is there 'wasted energy' and it would be better to remove (filter out) input below 100Hz? If there is be benefit, would a simple in line passive filter like the Shure A15HP work? ------------- Mike Technics sl1210g with Victor U-2 or Technics EPC-205C mk4 Accession MM, Majestic + Proprius, Solo ULDE Innuos Zen mini mk3 streamer Harbeth P3ESR XD paired with 2x REL t5x |
Replies:
Posted By: Fatmangolf
Date Posted: 13 Aug 2023 at 10:49am
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Agreed, the benefit would be increasing amp headroom by not putting power into the low frequencies the speakers are not reproducing. There is a potential downside as the high pass filter will introduce a phase delay above the crossover frequency but it may sound fine. Try it and see what you think Mike. ------------- Jon Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
Posted By: Mikeh
Date Posted: 13 Aug 2023 at 2:13pm
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Cheers Jon, my thinking was along the same lines. Might be worth trying to see if there's any audible difference. ------------- Mike Technics sl1210g with Victor U-2 or Technics EPC-205C mk4 Accession MM, Majestic + Proprius, Solo ULDE Innuos Zen mini mk3 streamer Harbeth P3ESR XD paired with 2x REL t5x |
Posted By: Fatmangolf
Date Posted: 13 Aug 2023 at 3:55pm
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In my experience the Proprius amps haven't run out of energy so your may not need fixing. I've just looked up the Shure unit, it is a passive mic filter at £100 for a pair and unclear what the part(s) inside are. It may not be right for the impedances in your hifi and any extra amp wattage may be outweighed by a loss in sound quality. ------------- Jon Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
Posted By: Graham Slee
Date Posted: 16 Aug 2023 at 10:45pm
I agree with Jon, if you hear an LF phase difference like I have it will "do your head in". The 90Hz drop off suggests rising impedance and it won't "waste power". ------------- That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps |
Fatmangolf wrote:Posted By: Mikeh
Date Posted: 17 Aug 2023 at 8:42am
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Thanks for the feedback. I'm in no rush to purchase any kind of filter and waste cash, so will do some more research and check out the options. ------------- Mike Technics sl1210g with Victor U-2 or Technics EPC-205C mk4 Accession MM, Majestic + Proprius, Solo ULDE Innuos Zen mini mk3 streamer Harbeth P3ESR XD paired with 2x REL t5x |