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38596Re: U shaped foam frame around speakers

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  • HM
    Jun 13, 2012
      Was the Watkins woofer the one with 2 voice coils driven individually via separate crossover branches to have one voice coil for deep bass and the two for getting upper bass right?
      BR HM
      >
      > WOW!! A true blast from the past. That's the firm and those are the
      > images they used in the old ads. The Watkins was wide so as to build in
      > the echo muffs concept. The width probably also lowered the baffle step.
      > The Watkins woofer was used in many of the big Infinity systems from that
      > era.
      >
      > On Wed, Jun 13, 2012 at 2:50 PM, Robert <regtas43@...> wrote:
      >
      > > **
      > >
      > >
      > > "echo muffs" as I recall the name?
      > > See here
      > > http://www.bobbyshred.com/infinity/watkins.html
      > > These guys have got to be good--Kingsport is right
      > > near Knoxville(my home town).
      > > Seriously, there are some very interesting measurements
      > > of after ring of tone bursts shown on this site.
      > > In a sensible world, everyone would be looking
      > > into this!
      > > REG
      > >
      > > --- In regsaudioforum@yahoogroups.com, Tom Mallin <tmallin4@> wrote:
      > > >
      > > > Yes, many years ago when such a product was marketed in the US by a
      > > speaker company named Watkins, I tried a homemade version. At the time I
      > > quickly concluded that while it had a positive effect, putting the Sonex on
      > > the walls further from the speakers was much more effective. You need more
      > > Sonex for wall treatment, though.
      > > >
      > > >
      > > >
      > > > On Jun 11, 2012, at 4:55 AM, ymm <yipmangmeng@> wrote:
      > > >
      > > > > Hi HM,
      > > > >
      > > > > I mean around the speaker ,sides and back, like using 3 thick Sonex
      > > sheets.
      > > > >
      > > > > BR
      > > > > Yip
      > > > >
      > > > >
      > > > > From: HM <hmartinburm@>
      > > > > To: regsaudioforum@yahoogroups.com
      > > > > Sent: Monday, 11 June 2012, 17:44
      > > > > Subject: [regsaudioforum] Re: U shaped foam frame around speakers
      > > > >
      > > > >
      > > > > Hi Yip
      > > > > Do you mean cabinet panels or the front baffle area around the tweeter
      > > and midrange?
      > > > > I remember speakers from the later 1970ies with thick foam covering
      > > the front. The sound must travel through much foam to the side and through
      > > little foam towards the listener.
      > > > > The BBC LS3/5a had thick felt pads around the tweeter.
      > > > > BR HM
      > > > >
      > > > > >
      > > > > > Has anyone tried out using a thick U shaped foam frame around each
      > > speaker to eliminate
      > > > > > the side reflections?
      > > > > >
      > > > > > Yip
      > > > > >
      > > > >
      > > > >
      > > > >
      > > > >
      > > >
      > >
      > >
      > >
      >
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