2x Infinity SM 150 + HK 3270
- Condition
- Good
- Location
- Dortmund, DE
- Source
- Kleinanzeigen
- Posted
- 8 Jun 2026
- Last seen
- 1d ago
RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
Verkaufe hier meine geliebten Three-Way Speaker.
Ich muss mich leider von Ihnen trennen, da ich aktuell keine Möglichkeit habe sie zu stellen.
Sie haben dem Alter entsprechende Gebrauchsspuren, funktionieren aber noch vollständig. Gerne an einen Bastler abzugeben.
At €300, this pair of Infinity SM 150 floorstanders is a clear bargain, sitting well below the typical used market where refoamed examples with new tweeters often list near €550–€600. The listing price is roughly half the cost of a professionally restored unit on Reverb, which carries a new price of $477 plus $395 shipping, translating to well over €900 total. Even accounting for regional variation, €300 is an aggressive low for these 3-way sealed-box monitors, especially given their 101 dB sensitivity and robust 1988 heritage.
The SM 150 remains well-regarded for its dynamic punch, wide frequency response (44–22,000 Hz), and studio-monitor pedigree, making them ideal for both hi-fi and active listening. Their sealed-box design offers tight bass control, and the 8 Ohm impedance ensures compatibility with most amplifiers. At this price, the upside is significant: even if the woofers need refoaming or tweeters are aging, the deal leaves ample budget for repairs while still delivering a high-performance speaker that’s rare to find in this condition. This is a genuine buying opportunity for enthusiasts who value legacy performance over modern gloss.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Infinity emerged in 1968 from a Woodland Hills, California garage, founded by Arnie Nudell, John Ulrick, and Cary Christie. Driven by Nudell's passion for classical music and innovative engineering, the trio launched with the groundbreaking Servo-Statik speaker system, featuring electrostatic panels paired with a servo-controlled woofer derived from defense technology. This American brand quickly gained traction through pioneering materials like neodymium magnets, mylar diaphragms, and polypropylene cones, establishing a legacy of pushing audio boundaries before acquisitions by Electro Audio Dynamics in 1974 and Harman International in 1983.
The company has long focused on loudspeakers as its hallmark, from early electrostatic hybrids and the iconic Reference and Kappa series to later EMIT and EMIM drivers in the 1970s. While primarily a speaker specialist, Infinity has ventured into home and mobile audio, including amplifiers and systems under Harman ownership, now part of Samsung since 2017. Turntables, DACs, headphones, and cables remain outside its core expertise.
Positioned as a mid-tier powerhouse with high-end aspirations, Infinity commands respect among knowledgeable buyers for its vintage collector appeal and enduring innovations. Once a darling of audiophiles for transparency and dynamics, it now blends accessible performance with Harman reliability, appealing to those seeking proven heritage without boutique exclusivity.
See all Infinity listings on RADAR.