On 2/5/2018 10:13 AM, Alan wrote:
On 02/05/2018 07:58 AM, Bill wrote:
I did receive a couple of direct replies indicating I might well be
disappointed in the low end department - which I need for AM and SWL. I
also dabble in ESSB.
I'm not an expert in speaker design but I have dabbled a little. I
think that to get good bass response in a small enclosure you have to
give up efficiency - it takes a lot more power to drive the speaker.
Basically it's a tradeoff between small size, good bass response and
good efficiency - pick any two.
This is a good description of the tradeoffs. BUT -- there is NO useful
energy in human speech below about 200 Hz, and a cone doesn't have to be
very big to reproduce that with reasonable efficiency. We're not
reproducing music here. Riley Hollingsworth, our hero who cleaned up ham
radio in his gig at the FCC before he retired a decade or so ago, said
it quite well; "if you want to transmit hi-fi, buy a radio station."
73, Jim K9YC
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