5/3/2023 0 Comments Sonoro ielements radio speaker![]() The ballad talks about Frankie, a good and devoted woman, and about her lover, Albert, a deadbeat and violent, who betrays her. In the last years of his turbulent life finally came a good success in the music field, which even got him to a tour in Europe. From 1910 to 1930 he was arrested several times, in Texas and Louisiana, for fighting, attempted murder, for getting some girls pregnant. Leadbelly, stage name of Ledbetter, that derives from a bullet never extracted from his belly, had a very busy life. The first song is one of the first and most peculiar Negro-American ballads, Frankie and Albert in the famous interpretation of Huddie Ledbetter. The old recordings have shown an unusual charm and it is worth listening to them. Listening to such songs with this device was particularly exciting, given the dominance of medium tones and voices. The recordings made with the Graetz 162W are all dedicated to the dawn of Jazz. Its graceful shape, the choice and the processing of the wood and its musicality make it a very enjoyable and reliable device. The interfacing with external sources, CD players, bluetooth etc. The efficiency of the two loudspeakers and the very contained distortion give this radio a powerful voice, despite the limited power available. The treble control effectively solves the problem. The absence of a real tweeter makes it necessary to emphasize the treble to get a balanced response. The Tone Control, separate bass and treble, is inserted in the feedback network.Ĭonclusions: a warm and mellow sound was what one would expect from the Graetz 162W, and this is even its most evident feature. This allows to keep the perception of the extreme sounds of the audible audio spectrum constant even at low volume levels. ![]() The loudnes circuit changes the curve response of the preamp section specularly to the Fletcher–Munson curve. It is known, in fact, that when listening at very low volume, the low and acute notes are not perceived with the same sound intensity as the medium notes, which clearly prevail. The Volume potentiometer is equipped with a loudness pinout. The Audio Section is entrusted to a EL41 pentode EL41 working in A Class. In the diagram here, the HF circuit is highlighted in blue and the audio stage one, instead, is highlighted in red. The same tube is used simultaneously as a audio preamplifier. The HF section is entrusted to an EF80 Variable transconductance. Both of them will be examined in detail in the specific section. The two speakers are connected in series, there is no a crossover network between the two, the separation of frequencies is entrusted to the mechanical characteristics of the speakers themselves. The electromagnetic coil loudspeaker has a considerable extension towards the medium-low frequencies. The permanent magnet loudspeaker, with a smaller diameter, has a greater extension towards medium and high frequencies. Moreover, both of these devices have very interesting circuit choices which provide them with a very peculiar sound.įirst of all, they are both equipped with an electromagnetic coil loudspeaker and a permanent magnet loudspeaker. Actually, the 162W differs from the 163W, top model of the Graetz production in 1952, only for the output tube, one of the two speakers and some other minor details. When it was decided to restore and test the Graetz 162W, expectations were quite high. In order to avoid interpreting the measurements incorrectly, it is very important to read the warnings carefully the first time. This new section has been developed for an objective comparison of different devices. Not even the manufacturers themselves detailed the technical features of their own devices at this level. There is no such thing anywhere else, as far as I know. ![]() Starting from this one, the reviews will be accompanied by a section with graphs of technical measures of the most important parameters. ![]() The review of the Graetz 162W is different from all the reviews ever published.
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