Home Speaker Asylum

General speaker questions for audio and home theater.

Re: haven't heard the RM33si

The RM33si works well with all but the very lowest power tube amplifiers. Sensitivity is greatly misunderstood, with the common wisdom being that the higher the number, the easier the speaker would be to drive. However, there are other factors that the amplifier may encounter such as large phase angles and low impedance. In fact, a low impedance speaker of higher sensitivity derives the higher output
by drawing more current. This tends to make small SET amps unhappy, defeating any advantage that the higher sensitivity would offer.
(apart from the marketing advantage)

The RM33si has remarkable bass extension for what is a rather small enclosure. There is no external bass equalizer required that might place more demands upon the driving amplifier. And the amplifier sees a very easy 8 ohm load with well controlled reactance.


The most advanced drive units today, in our opinion, are not the most efficient ones. The amazing RM33si Magnesium midrange driver is specified at about 85 dB raw output.

So, while the 83 dB spec might initially lead one to pass up the stunning performance of the RM33si, a simple listening trial with a given amplifier may well prove eye-opening. (and ear-opening)
(hopefully followed by wallet-opening!)

Jeff


President, JosephAudio
http://www.josephaudio.com


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  • Re: haven't heard the RM33si - Jeff Joseph 10:31:52 09/25/01 (1)


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