Infinity 2500

Name: Infinity 2500
Brand: Infinity

The Infinity 2500 is a floor-standing, 4-way bass-reflex loudspeaker from the company's Reference Standard line. Documentation is thin - no production years or original price have surfaced in the record. Two spec sources agree on nearly every detail, so the design itself is fairly clear.

The 2500 paired a 12-inch woofer with a 5.25-inch cone midrange and a pair of Infinity's proprietary EMIT planar tweeters - one handling treble, one the super-highs. Crossover points were 150 Hz, 3.5 kHz, and 9.5 kHz. A period review in HiFI-Stereo (1982, p.175) described the system's planar diaphragm EMIT tweeter and its frequency response range. It was rated for 34 Hz to 40 kHz (±3 dB) at 90 dB sensitivity, with an 8-ohm nominal load and a 10-250 watt amplifier recommendation. The cabinet measured 420 × 1118 × 380 mm and weighed 47.5 kg.

The sources disagree on one point. HiFi Engine lists the midrange as 135 mm, and Infinity Classics lists it as 130 mm. Both round to 5.25 inches, so it may simply be rounding, but the exact figure remains uncertain.

Type: 4-way floor-standing, bass reflex
Drivers: 12" woofer, 5.25" midrange, 1" EMIT tweeter, 1" EMIT super tweeter
Frequency response: 34 Hz – 40 kHz (±3 dB)
Sensitivity: 90 dB/W/m
Impedance: 8 ohms
Crossovers: 150 Hz, 3.5 kHz, 9.5 kHz
Recommended power: 10–250 W
Dimensions: 420 × 1118 × 380 mm (W×H×D)
Weight: 47.5 kg

Beyond these specs, almost nothing is recorded about the 2500 — no launch date, no list price, no contemporary reviews, and no collector lore that I could track down. If you own a pair or have seen one in the wild, the archive would love to hear from you.