Thermaflow
Printed From: Speakerplans.com
Category: General
Forum Name: General Forum
Forum Description: Open Discussion / Questions
URL: https://forum.speakerplans.com/forum_posts.asp?TID=109211
Printed Date: 27 March 2026 at 5:30am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Thermaflow
Posted By: snowflake
Subject: Thermaflow
Date Posted: 02 September 2025 at 3:44pm
what's this? |
Replies:
Posted By: Tinnitus Rex
Date Posted: 02 September 2025 at 5:21pm
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I would like to see a diagram of their system with heat flow.. because Im perhaps not understanding what they are suggesting is exchanging heat energy from the voice coil to the exterior of the cabinet ..using air "conduction" sounds massively inefficient to me.. why not use a heat pipe attached to the thermal mass of driver magnet to an external radiating surface.. or just design the cabinet with driver magnet not inside the box ..like many are anyway. ------------- "couldn't we just like... use headphones?" |
Posted By: fudge22
Date Posted: 02 September 2025 at 7:07pm
A spoof, wind up or April fool. Take your pick. |
what's this?Posted By: BJtheDJ
Date Posted: 02 September 2025 at 9:07pm
Their website at https://pchaudio.co.uk/" rel="nofollow - https://pchaudio.co.uk/ says that they're in Downham Market, Norfolk. Sub-woofer page https://pchaudio.co.uk/products/subwoofers" rel="nofollow - https://pchaudio.co.uk/products/subwoofers looks interesting. PS The natural wood flight https://cases%20pchaudio.co.uk/products/flight-cases" rel="nofollow - cases https://pchaudio.co.uk/products/flight-cases look the part as well.
------------- I started out in this business with nothing. I still have most of it left. |
Posted By: fudge22
Date Posted: 03 September 2025 at 8:45pm
I’m pretty sure that for a location where is the correct adverb to use not what.
Whilst I wouldn’t agree, I do accept that what constitutes interesting is subjective. However the linked page has zero information on passive aperiodic loudspeaker cooling manifold technology, which is where the OP asked about.
It states that the standard colour is black although other colours are available. Given the 3 to 5 month lead time, I assume that materials are only ordered once an order/deposit has been placed, so I would imagine that an unpainted case could be requested. |
Posted By: BJtheDJ
Date Posted: 03 September 2025 at 9:20pm
So sorry :) Edited out the part of the post that I was replying to, where Fudge22 (replying to snowflake) said: "A spoof, wind up or April fool. Take your pick." ------------- I started out in this business with nothing. I still have most of it left. |
Posted By: MarjanM
Date Posted: 04 September 2025 at 1:27pm
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Their woodwork is exeptionally good. The technology mentioned is in the pattent approval process so no details publicly shown. The entire design looks very interesting and i am sure it will work as advertised. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: fudge22
Date Posted: 05 September 2025 at 1:34pm
Exceptionally good woodwork is not that difficult if you have access to a CNC router; assuming you have reasonable CAD skills. Curious as to why there are only photos of the racks/cases on the web site, presumably no actual loudspeaker cabinets exist to photograph.
Do you have a link, or patent number? I’ve looked on the UK gov patent site and there is nothing listed. With regards the trade marks, Kaizen Acoustic turned up nothing and Thermaflow is registered but nothing to do with PCHAudio.
I’m not sure whether a “woosh” is incoming, but from the description: ThermaFlow adds a flush, resistive, (aperiodic) manifold between a sealed rear chamber and horn path. Via a flush perforated plate + foam. I assume that this is a snail style front loaded horn (similar to the punisher horn). A vent is cut in one of the rear chamber panels, and then covered with a perforated panel and sheet of foam. A foam covered perforated panel basically describes a typical grille. Hole size, layout and percentage of open area may be different but essentially a grille. Here is a simple paint drawing for those having difficulty understanding. The red bit is the passive aperiodic cooling manifold.  I look forward to independent tests proving that this is indeed capable of reducing the voice coil temperature up to 30ºC, but until then, if this is genuine, and not a spoof or just some AI generated drivel, my polite response is that I remain sceptical about its effectiveness. |
Posted By: Jan-2T
Date Posted: 05 September 2025 at 1:47pm
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oh they have plenty fotos of their cabs, just went looking there. (PC, firefox browser) went to products, selected one and scroll right through the pictures. I just don't want to lift those amp cases, two 100 year old trees went into each... looking just heavy, double 18mm  ------------- Music! |
Posted By: fudge22
Date Posted: 05 September 2025 at 2:03pm
OK. The scroll is not working for me, so appologies for the incorrect info. I'm still sceptical about the device being discussed. |
Posted By: BJtheDJ
Date Posted: 05 September 2025 at 3:19pm
Hover the cursor over the picture [Product Information] will appear, click on that and you'll get a pic of the cabinet. St the bottom of that pic will be 3 small circles, click on one of the smaller circles and get a scroll option. ------------- I started out in this business with nothing. I still have most of it left. |
Posted By: Lucasdude
Date Posted: 05 September 2025 at 5:19pm
| Speaking of driver cooling, I've noticed in the many videos that have surfaced of that massive UK Resonance system a few weeks back that all of the sub cabs have a star shaped metal item embedded into the woodwork right behind where I assume the driver is located. Ive never seen that before, and I'm wondering if its a cooling system that's connected to the back of the magnet somehow? |
Posted By: MarjanM
Date Posted: 05 September 2025 at 6:48pm
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Plenty of pictures on their FB page and on Sam personal page too. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: fudge22
Date Posted: 06 September 2025 at 9:40pm
Thanks for the info, but the problem in this instance was with the browser, not the user.
I can’ t comment on this particular design, but various attempts at passive cooling have surfaced over the years, with the promise of significant benefits, None have gained much traction or widespread adoption. |
Posted By: HumbleDeer
Date Posted: 26 September 2025 at 10:57pm
These are some boxes from errr, 6, 7 year ago? They were built by Joseph / PCH Audio. Pictures are mine. These products/boxes should be on the website under the legacy/discontinued items.    |
Posted By: BigSoundNorthWest
Date Posted: 27 September 2025 at 3:38pm
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I've seen some PCH boxes in the flesh. Zam from UKPONICS Sound in Burnley runs four of Joe's scoops, as well as four kicks and mid tops
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Posted By: Timebomb
Date Posted: 28 September 2025 at 4:56pm
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Joes woodwork is really good, hes built batches of Orbit 4s for me. Not 100% sure on this Thermaflow thing but it seems like the rear chamber has a port that is deliberately tuned out of the usable passband so the port has little output but improves cooling compared to a standard small closed chamber. I dont really know though. ------------- James Secker facebook.com/soundgearuk James@soundgear.co.uk www.soundgear.co.uk |
Posted By: snowflake
Date Posted: 28 September 2025 at 8:08pm
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Why Our ThermaFlow™ Horn Subs Are Better... Vent the heat, not the tone. ThermaFlow™ is our flush, aperiodic cooling manifold for front-loaded horn subs. It quietly exchanges air between the rear chamber and the horn path, so the motor runs cooler while the cabinet still behaves sealed-like in the 25–60 Hz band—no reflex “unloading,” no port talk, no change to your voicing. What you get (vs. conventional horn subs) Consistent SPL all night: typically 0.5–1.5 dB less thermal compression, so the mix you set at soundcheck is the mix you keep. Cooler, safer drivers: real-world –10–30 °C lower voice-coil temperature at the same drive → longer component life and fewer failures. Sealed-like control: transient punch without the reflex trough; Fc shift ~5–10% with lower Q (tighter, cleaner). Silent airflow: large flush perforations + reticulated foam = zero vent talk and minimal turbulence near the mouth. Tour-ready serviceability: through-bolted plates, standard reticulated PU foam, stainless hardware—fast to inspect and replace. Why it beats reflex/hybrid “cooling ports” No tuning trap: short ports + resistive foam = heavily damped; there’s no low-tuned resonance to unload the cone or smear group delay. Low velocity by design: bigger effective area than the ports (≈ +34% in our reference build), so air moves freely without hiss. Predictable deployment: same response, show to show; less EQ drift as temperatures rise. Proof you can measure... Impedance sweep: sealed vs ThermaFlow™ → no reflex second peak, broader/lower main peak, Fc drop ≤ 5–10%. Thermal check: ΔR (hot–cold) shows ~28 °C typical coil temp reduction over a 10-min 25–60 Hz drive—exactly what reduces compression.
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