Jamo 307 Bookshelf speakers

The Jamo 307 has a bass reflex port on the rear panel. The diameter of the soft dome of the tweeter is 25 mm, the diameter of the conical woofer is 127 mm. The design of the front panel deserves attention, pleasing to the eye with smooth contours that increase rigidity. This is a reliable shield against unwanted hull vibrations. Note the original design feature: the fixation of the decorative grille is carried out with the help of magnets. Rated system power - 70 W, musical - 100 W. It is allowed to connect according to bi-wiring and bi-amping schemes, dimensions 245x380x310 mm. Jamo's accurate sound and technical parameters are characterized by "exemplary" behavior. At the highest frequencies (from 16 to 20 kHz), the sensitivity loses about 10 dB, which can be noted by an experienced listener as a certain sound feature. Within the main range (100 Hz-16 kHz), the average unevenness is hardly more than 2 dB, this is aerobatics. Obviously, the quality of the heads, and the care shown for the internal volume, which dampens its own resonances well, and the noted properties of the front panel, and the quality of the crossover filter, the role of which can hardly be overestimated, have an effect. We would like to have deeper bass, but in general, the sound of the speakers does not contradict the conclusions made on the basis of the analysis of technical data. A fairly accurate interpretation of the sound was noted by experts on relatively simple music programs; the vocal parts in the melodic songs of ABBA from the disk of "golden hits" of the Swedish group sounded comfortable. High frequencies were quite correct, which is another evidence in favor of rational design: you can do without "architectural excesses" when the cutoff frequency reaches ultrasonic heights. The sensitivity of the system is relatively low - 85 dB (in the description - 87 dB). But the uniformity of the field is good and gives a reliable stereo effect in a wide area. The characteristic of the input impedance module is a real example of careful design: the difference between the maximum and minimum resistance is only 11 ohms, the average value is about 9 ohms, and the nominal impedance is 4.5 ohms. The bass reflex tuning frequency is 65 Hz, the filter section frequency is 3 kHz.