[TenTec] COMMUNICATIONS SPEAKERS Article

[Paul Kraemer]

Few subjects will probably illicit more passionate response than the one of 
what speaker should I use.
Simple answer. The one that sounds best to you.
Recent tinkering with my OMNI VI to make it sound better without any extra 
holes led me to try this speaker
http://www.parts-express.com/pe/showdetl.cfm?partnumber=292-524
It is a "hi fi" type with a wide response that met my criterion of fit the 
existing space without sheet metal modification, work better (to my ears) 
than the factory original,  and $10 or less price range.
My final analysis is that it met all criterion.
Although it doesn't mount from behind the sheet metal that holds the speaker 
it easily drops in from the front with 4 tabs of double stick tape to secure 
in place and does not interfere with the top cover.
It produces a significantly higher spl than the original.
It has an extended lf response.
It also has an extended hf response which enhanced the hiss factor, not 
desireable but easily compensated with a small NP electrolytic across the 
vc.
Just an account of my recent dabbling.
YMMV. It may sound great to you. It may not.
Paul K0UYA

----- Original Message ----- 
From: "Duane Calvin" <ac5aa1 at gmail.com>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Wednesday, February 27, 2013 8:09 AM
Subject: Re: [TenTec] COMMUNICATIONS SPEAKERS Article


This is a decades-long ongoing debate which began with radios that had no
ability to shape the speaker/headphone audio.  Using "hi-fi"
headphones/speakers, indeed, provide accurate reproduction of everything the
radio outputs including high-pitched heterodynes, off-frequency splatter,
etc., etc. which could be reduced significantly by a sound reproduction
device which rolled off the high frequencies.  Usually that was spec'ed with
a bandwidth like 300 - 3000 Hz, but it varied.  On a clear frequency with no
QRM/QRN/Lids, give me the wide open response.  Otherwise, I'd like to tailor
the audio some, whether it's using the receiver's audio controls, or, if
they're not available, then a communications speaker or headset.  So, it all
depends on (1) your equipment's capability, (2) your intended use, and (3)
your personal preferences.  I don't understand the shouting here on a single
"correct" answer.  I'll take a set of headphones with cotton stuffed in
them, please!  :-)

73, Duane

Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com




-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Barry N1EU
Sent: Wednesday, February 27, 2013 2:57 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] COMMUNICATIONS SPEAKERS Article

I couldn't agree more with Jim's comments.  If you want to tailor the
sound, do it in the electronics, not in the speaker.  The speaker should be
an accurate transducer.

And I love my little RCA/Radio Shack/Optimus speakers (Pro-X44AV)!

73,
Barry N1EU

On Wed, Feb 27, 2013 at 8:19 AM, Jim Brown
<k9yc at audiosystemsgroup.com>wrote:

> On 2/26/2013 10:29 PM, Richards wrote:
>
>> YES - the author makes a good case for using something tailored to the
>> task.
>>
>
>   Bullsh&t.  What is needed for good speech quality is nothing more or
> less than a loudspeaker with flat response AND uniform coverage in the
> speech range. And, because many (most?) ham rigs don't have high power
> audio output stages, it needs to be fairly efficient. "Tailored to
speech?"
>  Horseh*t.  Nothing more or less than a decent small, accurate loudspeaker
> that sounds the same over a fairly wide angle.
>
> Now, it so happens that Optimus is the "house brand" that Rat Shack used
> in the 70s and 80s. They didn't make anything themselves, but some of the
> small speakers they sold under the Optimus name were pretty decent, and we
> used them a bit for making noise in rooms to do acoustic testing.  But
> "optimized for speech?"  Zebrash&t.
>
> The reason that loudspeaker he likes sounds good on speech is that it's a
> decent "flat" (natural) loudspeaker. .
>
> 73, Jim Brown K9YC
> Fellow, Audio Engineering Society
>
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