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-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.