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Re: 12pi bass horn plans [message #64207 is a reply to message #64205]

Wed, 06 October 2010 18:21

Wayne Parham
Messages: 18677
Registered: January 2001

Illuminati (33rd Degree)

I was recently awarded a patent on the cooling system used in this basshorn. I'm really proud of it - it brings three powerful technologies together to make what I think is the worlds best prosound subwoofer. 1. Horn loading reduces excursion and increases efficiency, so distortion is low and SPL is high. 2. Push-pull drive further reduces distortion, particularly at low frequencies where the horn begins to unload and can no longer damp the diaphragm(s). 3. Cooling plugs reduce motor temperatures, wicking away heat in the core.

Direct heating from induction and indirect heating from voice coil radiation and convection heat the motor core to temperatures high enough to cook on. Diaphragm motion is limited because of horn loading, which is a good thing, but it reduces the ability of the woofer to generate sufficient forced air convective cooling through the vent. The cooling plug approach helps remove heat from the motor core, augmenting the woofer' ability to cool itself. This is particularly important on horn loaded subwoofers, because the cooling vents are partially stalled due to horn loading.

12pi push/pull benefits

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[Message index]

		12pi bass horn plans By: vega on Sat, 07 August 2010 07:39
		Re: 12pi bass horn plans By: Wayne Parham on Sat, 07 August 2010 09:17
		Re: 12pi bass horn plans By: Robert.L on Mon, 20 June 2011 19:38
		Re: 12pi bass horn plans By: Wayne Parham on Mon, 20 June 2011 21:30
		Re: 12pi bass horn plans By: TruManagement66 on Mon, 01 August 2011 15:27
		Re: 12pi bass horn plans By: Wayne Parham on Mon, 01 August 2011 16:51
		Re: 12pi bass horn plans By: klmax on Sun, 07 August 2011 04:42
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 07 August 2011 08:17
		Re: 12pi bass horn plans By: TruManagement66 on Sun, 07 August 2011 13:35
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 07 August 2011 15:31
		Re: 12pi bass horn plans By: Jaycore on Tue, 29 December 2020 02:26
		Re: 12pi bass horn plans By: Wayne Parham on Tue, 29 December 2020 09:24
		Re: 12pi bass horn plans By: albrecht89 on Wed, 15 September 2010 10:45
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 15 September 2010 16:47
		Re: 12pi bass horn plans By: fbottone on Thu, 16 September 2010 16:33
		Re: 12pi bass horn plans By: Wayne Parham on Thu, 16 September 2010 18:46
		Re: 12pi bass horn plans By: fbottone on Fri, 17 September 2010 11:42
		Re: 12pi bass horn plans By: buggers on Fri, 17 September 2010 14:32
		Re: 12pi bass horn plans By: Wayne Parham on Fri, 17 September 2010 18:26
		Re: 12pi bass horn plans By: albrecht89 on Wed, 29 September 2010 07:11
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 29 September 2010 07:28
		Re: 12pi bass horn plans By: realaudioent on Wed, 06 October 2010 14:05
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 06 October 2010 18:21
		Re: 12pi bass horn plans By: teck2100 on Thu, 17 February 2011 20:06
		Re: 12pi bass horn plans By: Wayne Parham on Fri, 18 February 2011 07:48
		Re: 12pi bass horn plans By: Hermit on Sat, 05 March 2011 05:32
		Re: 12pi bass horn plans By: Wayne Parham on Sat, 05 March 2011 08:36
		Re: 12pi bass horn plans By: Jthomas on Sun, 06 March 2011 13:54
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 06 March 2011 22:08
		Re: 12pi bass horn plans By: Selector on Sat, 02 April 2011 23:02
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 03 April 2011 09:32
		Re: 12pi bass horn plans By: Selector on Sun, 03 April 2011 14:29
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 03 April 2011 21:26
		Re: 12pi bass horn plans By: Norris Wilson on Tue, 05 April 2011 21:04
		Re: 12pi bass horn plans By: scameron on Mon, 18 April 2011 08:58
		Re: 12pi bass horn plans By: Wayne Parham on Mon, 18 April 2011 09:24
		Re: 12pi bass horn plans By: n.goulden on Sat, 07 May 2011 09:01
		Re: 12pi bass horn plans By: Wayne Parham on Sat, 07 May 2011 09:39
		Re: 12pi bass horn plans By: Fixvid on Tue, 24 May 2011 03:31
		Re: 12pi bass horn plans By: Wayne Parham on Tue, 24 May 2011 08:16
		Re: 12pi bass horn plans By: Fixvid on Thu, 26 May 2011 02:39
		Re: 12pi bass horn plans By: Wayne Parham on Thu, 26 May 2011 09:11
		Re: 12pi bass horn plans By: Fixvid on Fri, 27 May 2011 04:47
		Re: 12pi bass horn plans By: Wayne Parham on Fri, 27 May 2011 08:45
		Re: 12pi bass horn plans By: TruManagement66 on Wed, 08 June 2011 13:14
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 08 June 2011 18:37
		Re: 12pi bass horn plans By: Syskiyou on Sun, 14 August 2011 15:21
		Re: 12pi bass horn plans By: Wayne Parham on Sun, 14 August 2011 23:26
		Re: 12pi bass horn plans By: Syskiyou on Tue, 16 August 2011 01:00
		Re: 12pi bass horn plans By: Wayne Parham on Tue, 16 August 2011 08:06
		Re: 12pi bass horn plans By: Syskiyou on Wed, 17 August 2011 20:59
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 17 August 2011 21:12
		Re: 12pi bass horn plans By: Syskiyou on Wed, 17 August 2011 23:58
		Re: 12pi bass horn plans By: TruManagement66 on Sun, 30 October 2011 15:26
		Re: 12pi bass horn plans By: Wayne Parham on Mon, 31 October 2011 08:08
		Re: 12pi bass horn plans By: speakeraddict on Fri, 04 November 2011 00:16
		Re: 12pi bass horn plans By: Wayne Parham on Fri, 04 November 2011 08:08
		Re: 12pi bass horn plans By: stereo_dave on Tue, 29 October 2013 22:51
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 30 October 2013 01:27
		Re: 12pi bass horn plans By: Planet on Mon, 27 May 2019 08:45
		Re: 12pi bass horn plans By: Wayne Parham on Mon, 27 May 2019 10:53
		Re: 12pi bass horn plans By: Pinni on Thu, 06 June 2019 13:24
		Re: 12pi bass horn plans By: Papyrus on Thu, 05 December 2019 05:48
		Re: 12pi bass horn plans By: Wayne Parham on Thu, 05 December 2019 10:04
		Re: 12pi bass horn plans By: bassman on Wed, 22 January 2020 03:40
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 22 January 2020 14:47
		Re: 12pi bass horn plans By: Heathkit on Tue, 02 June 2020 10:32
		Re: 12pi bass horn plans By: Wayne Parham on Tue, 02 June 2020 10:55
		Re: 12pi bass horn plans By: Torsten on Tue, 30 June 2020 01:28
		Re: 12pi bass horn plans By: Wayne Parham on Tue, 30 June 2020 07:47
		Re: 12pi bass horn plans By: yperiwn on Tue, 21 July 2020 21:55
		Re: 12pi bass horn plans By: Wayne Parham on Wed, 22 July 2020 11:13
		Re: 12pi bass horn plans By: 1bleigh on Thu, 22 October 2020 15:52
		Re: 12pi bass horn plans By: Wayne Parham on Thu, 22 October 2020 15:56
		Re: 12pi bass horn plans By: Djbreizhl on Sat, 14 November 2020 11:44
		Re: 12pi bass horn plans By: Wayne Parham on Sat, 14 November 2020 17:13
		Re: 12pi bass horn plans By: PIplus on Sat, 06 February 2021 14:06
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		Re: 12pi bass horn plans By: Wayne Parham on Fri, 11 February 2022 09:42

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