Tube amp and speaker impedence matching


I recently purchased a Conrad Johnson CAV-50 and am actively looking for the "right" speakers. I found a couple of speakers (GMA Europas for one - rated 4 ohm) I would like to purchase, but I am concerned about presenting my amp with an improper impedence match and causing damage. The CAV- 50 is rated "45 watts per channel from 30 Hz to 15 kHz, both channels driven into 4, 8, or 16 ohms". I'm pretty new to all this so any help will be appreciated.
cdilascia

Showing 1 response by brett44

Cdilascia, for being new to this you are pretty smart to catch on to this concern so early in the game. I didn't figure it out until after making some poor purchase choices, but now this is one of the spec areas that I actually pay close attention to in speaker and amp reviews and spec sheets. But often the warnings given are vague: "The MamaMia speaker loading drops down to X.x Ohms below 125 Hz -- be sure and match amplifier carefully!" It's great that I know to be "careful" if considering the MamaMia speaker, but not quite great enough because I don't know exactly what precise values I need to look for in a partnering amp to achieve a good working combination.

Let's say that I get the preference of the speaker manufacturer for which amps are well-suited to drive his speakers, but for whatever reason, I don't like the suggested gear and want to consider other offerings. Does anyone know of a good set of reference tables available which match various speaker parameters with good and bad parameters for amplifiers? Or should we just find a trusted EE friend every time we want to be sure, and feed him whatever specifics the companies (except, apparently, ML) will provide us?