The AR-5 have a lot in common with the AR-3A. These speakers use the same crossover network and a similar midrange driver. The main difference with the AR-3A resides in a smaller woofer, hence a frequency response a bit less extended.
30B are introduced in 1984 and will last until the launch of the "Connoisseur" serie, in 1985. These two-way speakers show a simple and modern design. They are equiped with a 254mm woofer and a 25mm dome tweeter.
The AR-7 is a bookshelf speakers model that appears in 1973 and will remain in Acoustic Research's brochure until 1976. Derivating from the AR-6, but smaller, the AR-7 was intended to complement a quadraphonic system or a compact size stereo set-up.
The AR-2AX is launched in the mid-sixties as a lower-cost version of the A-3. It contains the 254mm woofer and the 19mm dome tweeter used in the AR-5, while the midrange is covered by an 89mm wide-dispersion cone unit. Adjustment of the level of the midrange and high-frequency speakers is allowed by controls on the back.
The AR-8S and AR-7, both launched in 1973, share the same dome tweeter. With its 254mm woofer, the AR-8S provides a better response in low frequencies. Due to its removal from AR's brochure in 1974, AR-8 is rather hard to find nowadays.