Pioneer Cs-787 (2024)

Walk into a vintage audio shop and you’ll spot the CS-99A immediately—it’s flashy. The CS-787 is the opposite. It is massive (25.5" H x 15.5" W x 12.75" D) and heavy (over 45 lbs). The cabinet is finished in a genuine walnut veneer that, when oiled, glows with a warm, furniture-grade luster.

The grille is a simple, dark brown cloth—unadorned. No lattice work. No badges screaming "Super Tweeter." Underneath that cloth, however, is the magic.

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Let’s be honest: you either love or hate the way the Pioneer CS-787 looks. The grille is not your standard black cloth. It is a dark brownish-gray woven fabric, but the real showstopper is the solid wood lattice frame that sits over the grille. pioneer cs-787

This lattice creates a geometric, three-dimensional shadow effect. Collectors often call this the "Batman" speaker because the lattice pattern vaguely resembles the silhouette of gothic skyscrapers or cape wings. Underneath the grille, the drivers are arranged in a vertical line, giving it a clean, tower-like appearance.

The cabinet is finished in high-quality wood veneer (often genuine walnut or ash), not the cheap vinyl wrap found on lesser speakers of the era.

To understand the CS-787, you must understand the era. 1976 was the peak of the "Receiver War." Pioneer’s own SX-1250 (a 160-watt-per-channel behemoth) was sitting on showroom floors. Speakers of the day needed two things: high power handling and high efficiency.

Pioneer’s typical approach was the "Kabuki" school of design: massive woofers, multiple midranges, super tweeters, and lattice grilles. The CS-787 broke that mold. It was Pioneer’s attempt to build an acoustic suspension speaker (a sealed box, not a ported one), pioneered by Acoustic Research in the 50s. This meant tighter bass, slower roll-off, and a requirement for serious amplifier grunt. Walk into a vintage audio shop and you’ll

The most striking feature of the Pioneer CS-787 is the driver layout. Unlike the more common HPM-100 (which used a planar super-tweeter), the CS-787 uses a horn tweeter.

In the golden era of hi-fi, roughly from the mid-1970s to the early 1980s, Pioneer was a titan. They gave us the legendary SX-series receivers, the unkillable PL- turntables, and the iconic HPM-100 speakers. But nestled quietly in the catalogs of 1979, priced just below the flagship HPM models, sat a curious and often overlooked beast: the Pioneer CS-787.

While collectors scramble over the HPM-150s and the elusive TAD drivers, the CS-787 remains an underground hero—a speaker that offers vintage Pioneer charm, robust build quality, and genuinely surprising sonics for a fraction of the cost.

This is where the Pioneer CS-787 divides the room. No, if: Let’s be honest: you either love

The Good: Because of the 96 dB sensitivity, these speakers are a dream for low-wattage vintage receivers. You could drive these to deafening volumes with a 15-watt tube amp. They are incredibly efficient. The bass is deep, loose, and warm—classic "West Coast" sound. For rock, funk, and disco from the 70s, the CS-787 is a party machine. The horn tweeter gives cymbals and snares a "snap" that feels visceral.

The Compromises: Modern audiophiles will notice flaws. The bass, while deep, is not very "tight." If you listen to fast electronic music or complex metal, the 15-inch woofer can sound slow compared to modern 8-inch or 10-inch woofers. Furthermore, the horn tweeter can be fatiguing during long listening sessions. If the crossover capacitors haven't been replaced (recapped), the sound can be harsh or muddy. Finally, the "Kabuki" effect is real—because there are so many drivers, the soundstage (the ability to pinpoint where instruments are in the room) is smaller than high-end British or American speakers.

Verdict: They sound like a 1970s rock concert. Big, fun, and slightly unruly. They are not for analytical listening, but for enjoying vinyl records in a large living room, they are glorious.