3-way, bass-reflex speakers with around 70W power handling (often 60W-100W range), large woofers (around 180mm/7"), mid-range, and piezo tweeters, featuring specific specs like 8Ω impedance, 85dB sensitivity, and a frequency response from the 40Hz-45kHz range. You'll likely find general Technics speaker guides or similar model manuals (like SB-LX70, SB-G90 for newer models) on audio forums or vintage sites, focusing on placement and connection, as official PDFs for this vintage model are scarce.
Key Specs to Look For (from similar models/listings):
Type: 3-Way Bass Reflex
Power Handling: ~60W-100W (RMS)
Impedance: 8Ω
Sensitivity: ~85dB
Drivers: 180mm Bass, 140mm Mid, 25mm Tweeter
Frequency Response: ~40Hz - 22kHz
Where to Search for Manuals/Info:
Audio Forums: Sites like Reddit's r/StereoAdvice often have users sharing info on vintage gear.
Vintage Audio Sites/eBay: Check for used listings of similar models (SB-LX70, SB-2470) for specs.
General Technics Downloads: Panasonic's support pages have newer models, but might offer general guidance.
Tips for Setup:
Placement: Place on a flat, stable surface, ensuring similar conditions (reflections) for left/right speakers.
Connection: Connect securely to your amplifier/receiver using appropriate speaker wire.
While a specific SB-2090 PDF is elusive, you can piece together setup and usage from general Technics manuals and specs from similar vintage models.
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2 Technics 3-way speakers, Model SB-LX70, Impedance: 8Ω, Output Power (RMS):200W.

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