Acoustic Research 310HO (1982)

A 3-way, 4-speaker floorstanding loudspeaker system from Acoustic Research’s HO series, featuring magnetic shielding and a slim profile design.

Overview

The Acoustic Research 310HO is a floorstanding loudspeaker system introduced in 1982 as part of AR’s HO series, positioned below the 312HO. It features a 3-way design with four drivers, including a long-stroke 25 cm woofer and dual 13 cm midrange units, aimed at delivering balanced, high-output sound. Known for its slim profile, the speaker incorporates mirror-image subwoofers and magnetic shielding, making it suitable for placement near video equipment. Available in black and maple finishes, the 310HO was noted by users for its attractive appearance and enduring performance.

Specifications

Product type	3-Way, 4-Speaker Floorstanding (Tall Boy) Loudspeaker System
Low-frequency driver	25 cm (10") cone type, long-stroke
Mid-frequency drivers	13 cm (5") cone type x2
High-frequency driver	2.5 cm (1") dome type
Frequency response	35 Hz to 20 kHz ± 2 dB
Sensitivity	95 dB / 2.83V / 1m
Impedance	8 Ω

Crossover frequencies	180 Hz, 2.5 kHz
Dimensions (W x H x D)	250 x 925 x 425 mm
Weight	25.0 kg
Original price	¥180,000 per pair (approx. 1997)

Design

The 310HO uses Acoustic Research’s Aeroform Tweeter, Focused Array Configuration, Energy Control Contour Baffle, and Voice Balanced Tone Matching technologies. It features a magnetic resistant design and built-in mirror-image subwoofers to maintain a slim profile. The system is available in black and maple finishes.

Product Family

The 310HO is part of the AR HO series and is positioned as a lower model than the 312HO.

Reception & Use

User impressions highlight the speaker’s attractive design and promising performance. One owner reported continued satisfaction after eight years of use. In home cinema setups, users have configured receivers to treat the 310HO as a "large" speaker.

Collectibility

A common issue with the 310HO is foam rot in the midrange drivers, requiring refoaming. Multiple user restoration projects have been documented, particularly involving the refoaming of the two 5-inch drivers.