Boxe Acoustic Research AR 3 HiEnd : pe 3 cai, diametru bass de 30 cm, suspensie bass panza cauciucata, cutiile sunt din lemn, culoare maro, reglaje medii/inalte, potentiometrele ar trebui unse, made in United States of America, bass tip compresie, plase de protectie, poze reale, dimensiuni H=64cm, L=36cm, A=29cm, impedanta 4 ohmi.
AR-3 and AR-3a Specs and Comparison
During the period in which both speakers, the AR-3 and the AR-3a, were available some alternations had been made to the AR-3 model, being more and more similar to the newer AR-3a. Some changes, as well as parts that did not change are listed below:
Originally the grille cloth of the AR-3 was different from the AR-3a, but changed in the later half of the 1960ies (approx. 1967) and became identical to the one of the AR-3a.
Early AR-3a had the cloth-surround alnico magnet woofers identical to the AR-3, which were already used in the AR-1. Later the AR-3, as well as the AR-3a were equipped with foam-surround ceramic magnet woofers.
Crossovers of AR-3 and AR-3a are different: Mid / Tweeter: 1000 / 7500 Hz vs. 575 / 5000 Hz. The lower midrange of the AR-3a was better for dispersion.