Oops, mine is a Realistic Minimus 7. Later, they were named the Optimus Pro 7. 
You can find a more full history of these nice little speakers here: 
http://www.angelfire.com/vt/audio/minimus.html

wunder
K6WRU

On Apr 22, 2013, at 7:35 PM, Walter Underwood wrote:

> I have a single Realistic Optimus 7 that I've been using with my Lowe HF-150 
> for years. They stopped making those, but you can find them fairly cheap on 
> eBay.
> 
> wunder
> K6WRU
> 
> On Apr 22, 2013, at 5:49 PM, Don Wilhelm wrote:
> 
>> I was fortunate to find a pair of Radio Shack Optimus speakers (5 inch black 
>> cube) at a 2nd hand store for $5.  They work great with my K3.  You may be 
>> able to find something similar if you shop around a bit.  These are 
>> non-amplified speakers and work quite well, no worries about RF feedback or 
>> other problems that sometimes occur with amplified varieties, and the K3 has 
>> more than adequate audio to drive these high efficiency speakers.
>> 
>> Since the K3 tailors the audio response, there is not really a need for 
>> "communications" speakers - the RX EQ will shape the audio to your desires, 
>> so "full range" speakers will work great with the K3. For those who do 
>> SWLing, the full range speakers may be better for those users than 
>> communications speakers.
>> 
>> 73,
>> Don W3FPR
>> 
>> On 4/22/2013 7:36 PM, Pete Lascell wrote:
>>> I too have used the 2-way radio speakers for more than 30 years and 
>>> originally did with my K3.  But after going thru the junk stach again a 
>>> discovered I had a pair of amplified speakers (not cheap) used with Radio 
>>> Dispatch Consoles as SELECT and UN-SELECT audio channels.  They contain ~ 6 
>>> watt audio amp and a substancial speaker, power by 12 volts.  So I now have 
>>> plenty of audio and with the speakers spaced about 6 feet apart there is 
>>> noticable separation, and the AFX function is great when desired.
>>> 
>>> With the extra amplification and volume controls I can set the K3 volume 
>>> control for hot earphone level, yet turn down the external speaker levels.
>> 
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> 
> --
> Walter Underwood
> [email protected]
> 
> 
> 
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--
Walter Underwood
[email protected]



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