[Elecraft] External speaker recommendation.....

[Walter Underwood]

Then I should plan on using my Magneplanar SMGa's, because they are 2 Ohm speakers. Except I don't have a K2. Dang.

wunder
K6WRU

On Jan 6, 2014, at 2:54 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 1/6/2014 2:02 PM, EricJ wrote:
>> The K2 speaker has been better for CW than anything else I have tried. 
> 
> Elecraft found a VERY good speaker for the K2.  Don's advice about looking for a 4 ohm speaker is also good -- virtually all loudspeaker amplifiers have a VERY low output Z, typically 0.1 Ohm or less, making them a constant voltage source. By simple Ohm's law, they will provide maximum power to the lowest impedance  which they are designed. Power is E squared divided by R, so you can use them with higher Z speakers, but you will lose 3 dB of level for 8 ohms, another 3dB for 16 ohms.
> 
> The second part of the equation is loudspeaker efficiency. In general, the smaller the loudspeaker, the less efficient it is. In other words, louder = bigger. The best 4 ohm loudspeaker I know of is the MR55, made by RCF, and Italian company. I've used them in some high profile projects. They're not cheap. Smaller speakers in their line are not nearly as nice.
> 
> 73, Jim K9YC