SP-1500X Loudspeaker System

SP-1500X Loudspeaker System

$350

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The Sansui SP-1500X is a vintage loudspeaker system from the 1970s, known for its classic design and audio performance. One of the Speaker have a noticeable hit on its side and the twitters are hold in place on an improvised manner.

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Design and Construction:
  • Type: The SP-1500X is a 3-way bass reflex speaker system, which means it uses three frequency drivers to handle different parts of the audio spectrum.
  • Drivers: It features a 255 mm (10-inch) woofer, a 76 mm (3-inch) midrange cone, and a 30 mm (1.2-inch) tweeter. These components combine to offer a broad frequency response.
  • Build: The speakers are housed in a cabinet with a detachable front grille, which allows for adjustment of the tweeter level with settings for ‘Normal’, ‘Soft 1’, and ‘Soft 2’. The construction includes a woodgrain vinyl finish, with some models exhibiting imperfections over time but often considered part of their charm.
Audio Specifications:
  • Power Handling: Rated at 70 watts, these speakers can handle significant power but are often suggested to perform best with amplifiers of 20 to 30 watts, typical of the era when they were made.
  • Efficiency: With an efficiency rating of 96 dB/W/m, they are quite sensitive, meaning they don’t require a lot of power to produce loud sound.
  • Frequency Response: The frequency range is broad, from 30 Hz to 20,000 Hz, allowing for a full spectrum of sound from deep bass to high treble.
  • Impedance: They have an impedance of 8 ohms, which is standard and compatible with most audio setups.
  • Crossover Frequencies: The crossover points are set at 1,200 Hz and 5,000 Hz, ensuring that each driver optimally handles its designated frequency range.
Usage and Maintenance:
  • These speakers have been noted for their warm sound and interesting driver designs. However, like many vintage units, they might require some maintenance such as recapping the crossover capacitors, especially if they’ve been stored for long periods.
  • The SP-1500X models have been serviced by enthusiasts who replace aging components to restore their original sound quality.

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