[Vintage-Audio] Vintage-Audio Digest, Vol 81, Issue 1

Thu Apr 12 14:23:41 EDT 2012

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Subject: Vintage-Audio Digest, Vol 81, Issue 1
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Today's Topics:

   1. Speakers Desired (Duane Fischer, W8DBF)
   2. Front Vs Rear Ports (Duane Fischer, W8DBF)
   3. Front And Rear Audio Ports (Duane Fischer, W8DBF)

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Message: 1
Date: Tue, 10 Apr 2012 13:52:39 -0500
From: "Duane Fischer, W8DBF" <dfischer at usol.com>
Subject: [Vintage-Audio] Speakers Desired
To: <vintage-audio at mailman.qth.net>
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Hi All,

I have a neighbor who is interested in purchasing some older speakers for 
his family room stereo system. (I wonder who talked him into that idea?) Do 
any of you have, or know of, any "good" Acoustic Research AR-3 or Advent 
model 2002 systems for sale?

He would also consider older three way systems with the twelve, or fifteen, 
inch woofers.

They would have to be shipped to Flint, MI, unless they happened to be 
within a 100 mile radius for pick up.

He is also interested in a fully operational seven inch reel to reel stereo 
deck. Preferably a four head model.

Thanks!

Duane Fischer, W8DBF - WPE8CXO
E-Mail: dfischer at usol.com
Hallicrafters web site: www.w9wze.net
HHRP web site: hhrp.w9wze.net

------------------------------

Message: 2
Date: Tue, 10 Apr 2012 13:57:18 -0500
From: "Duane Fischer, W8DBF" <dfischer at usol.com>
Subject: [Vintage-Audio] Front Vs Rear Ports
To: <vintage-audio at mailman.qth.net>
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Hi All,

Is there any advantage in using a rear ported speaker cabinet versus a front 
ported one?

The bass reflex system uses a tuned front port to phase the sound from the 
rear of the speaker cones with the sound from the front of the speaker 
cones. This provides about a 25% boost in audio, especially the lower 
frequencies.

The rear ported cabinets bounce the sound from the rear of the speaker cones 
off what, a wall? How does this keep the front and rear sound waves in 
phase?

Duane Fischer, W8DBF - WPE8CXO
E-Mail: dfischer at usol.com
Hallicrafters web site: www.w9wze.net
HHRP web site: hhrp.w9wze.net

------------------------------

Message: 3
Date: Tue, 10 Apr 2012 14:08:57 -0500
From: "Duane Fischer, W8DBF" <dfischer at usol.com>
Subject: [Vintage-Audio] Front And Rear Audio Ports
To: <vintage-audio at mailman.qth.net>
Message-ID: <005701cd174d$632481f0$c454e8cc at hpdc5100mt>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
	reply-type=original

i All,

Is there any advantage in using a rear ported speaker cabinet versus a front
ported one?

The bass reflex system uses a tuned front port to phase the sound from the
rear of the speaker cones with the sound from the front of the speaker
cones. This provides about a 25% boost in audio, especially the lower
frequencies.

The rear ported cabinets bounce the sound from the rear of the speaker cones
off what, a wall? How does this keep the front and rear sound waves in
phase?

Duane Fischer, W8DBF - WPE8CXO
E-Mail: dfischer at usol.com
Hallicrafters web site: www.w9wze.net
HHRP web site: hhrp.w9wze.net

------------------------------

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End of Vintage-Audio Digest, Vol 81, Issue 1
********************************************

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