pioneer cs-787

Pioneer Cs-787 ★ Recent & Top-Rated

The Hidden Giant: A Deep Dive into the Pioneer CS-787 Loudspeaker

In the pantheon of vintage audio, certain names echo with thunderous reverence: the JBL L100, the Klipsch Heresy, the Yamaha NS-10. Yet, lurking in the shadows of the 1970s hi-fi boom is a speaker that deserves a pedestal of its own—the Pioneer CS-787.

Weaknesses: Critical listeners often find the sound quality lacking in detail and accuracy. Common complaints include sibilant highs, a harsh midrange, and poor center imaging. The bass can sometimes feel "boomy" rather than tight or deep due to the lighter cabinet construction. Market Value & Advice pioneer cs-787

Sound character

was designed to be a centerpiece of a 1970s living room, weighing a substantial 17kg (37 lbs) per cabinet Key Specifications 4-way, totally enclosed system Max Power Input Frequency Range 35Hz to 20,000Hz Sensitivity 95dB/W at 1m Genuine Walnut The Hidden Giant: A Deep Dive into the

The Low End (The Good)

The 16" woofer produces bass that modern 6-inch bookshelf speakers can only dream of. When you play The Chain by Fleetwood Mac, you feel the kick drum in your spine. For classic rock, funk (Parliament-Funkadelic), and early electronica (Kraftwerk), the CS-787 is euphoric. It is warm, round, and slightly loose—not tight and dry like a modern studio monitor. It sounds like a 1970s rock concert. the Klipsch Heresy

Current Market Value (2025)

  1. Crossover Capacitors: The electrolytic capacitors inside are 40+ years old. Replacing them with modern film capacitors (like Dayton or Mundorf) will drastically improve clarity and tame the harsh highs.
  2. Potentiometers (L-Pads): Many CS-787 speakers have adjustment knobs on the back for midrange and treble. These get scratchy and fail. DeoxIT cleaner or replacement is required.
  3. The Cloth Surrounds: Good news! Unlike foam, the cloth on the 15-inch woofer is likely still intact. However, the sealant dries out. Applying a coat of "vintage speaker surround dope" (like Roy’s from Vintage-AR) will seal air leaks and tighten the bass.
  4. Grille Lattice: The wood lattice is fragile. If a corner is chipped, it is difficult to fix because of the complex shape.

While vintage equipment specs can vary by region, the core technical profile of the CS-787 includes: System Type: 3-way, bass-reflex (open volume) enclosure. Driver Configuration: Woofer: 200 mm (8-inch) cone. Midrange: 77 mm (approx. 3-inch) cone. Tweeter: 66 mm (approx. 2.5-inch) cone.

According to documentation from Hifi-Wiki, the system features the following technical characteristics: System Type: 3-way, bass reflex enclosure. Driver Configuration: Woofer: 200 mm (approx. 8-inch) cone. Midrange: 77 mm cone. Tweeter: 66 mm cone.