The Pioneer CS-787 is not for the measurement-obsessed audiophile who demands flat frequency response and pinpoint imaging. It is for:
If you plug a pair of CS-787s into a cheap 15-watt plastic receiver, you will hate them. They will sound dull, lifeless, and bass-light. These speakers are hungry. They need 50 to 100 watts of clean, high-current power to wake up.
Once fed properly, the transformation is startling.
The Verdict on Sound: The CS-787 sounds less like a Pioneer and more like a less-expensive AR-3a. It is an analytical, neutral speaker in a sea of boomy, smiley-face EQ speakers.
Note: Do not pay "vintage hype" prices. The CS-787 is not a rare TOTL (Top Of The Line) model like the HPM-100. It is a solid, mid-tier consumer speaker. Over $400 is too much unless they are mint with original boxes.
The Pioneer CS-787 is a victim of its own era's excess. Because it looks like a "Kabuki" speaker, many serious listeners write it off. But those who take a chance are rewarded with a warm, engaging, and incredibly fun loudspeaker.
It’s not a scalpel; it’s a sledgehammer wrapped in velvet. If you have a large room, a vintage receiver, and a love for analog-era music, don't overlook the CS-787. It is one of the last truly affordable giants of the Silver Age.
Rating: 7.5/10 (Highly Recommended for Vintage Rock/Jazz systems) Best Pairing: Pioneer SX-780, SX-980, or a 100-watt class A/B integrated amp. Pro-Tip: Pull them 12 inches from the wall. That 15" woofer needs room to breathe.
Do you own a pair of CS-787s? Restored a set? Let us know in the comments below.
Pioneer CS-787 is a classic 3-way bass reflex loudspeaker system originally manufactured in Japan between 1984 and 1985
. It is characterized by its large, traditional cabinet design and balanced vintage sound, making it a popular choice for collectors of 1980s Hi-Fi equipment. Technical Specifications According to documentation from
and vintage community listings, the key specifications include: System Type: 3-way, 3-driver bass reflex. Driver Configuration:
200 mm (approx. 8 inches) cone type for powerful low frequencies. 77 mm cone type for clear vocal presence. 66 mm cone type for crisp highs. Power Handling: 50 Watts (Nominal) / 80 Watts (Music Power). Impedance: Frequency Response: 40 Hz to 20,000 Hz. Dimensions: Roughly 58 x 32 x 26 cm (H x W x D). Approximately 20 kg per pair. Design and Performance
The CS-787 was designed as a capable, mid-range home speaker. It features a bass reflex port
that enhances lower-end response, often described by users on as "powerful without loss of quality".
The aesthetic is quintessential 80s, typically featuring dark wood-grain cabinets and removable front net covers. While some enthusiasts consider this era of Pioneer speakers to be more "budget-friendly" compared to the high-end HPM series, the CS-787 remains respected for its durability and "old school" sound signature. Maintenance Tips If you are acquiring or restoring a pair: Driver Inspection: pioneer cs-787
Check the paper cones and surrounds for any brittleness or "midrange defects" common in vintage units. Terminals:
The Pioneer CS-787 is a vintage 3-way bass reflex loudspeaker system originally released between 1984 and 1985. Designed as part of Pioneer's accessible home audio line, it was often paired with mid-range hifi "rack" systems of the mid-80s to provide a full-room sound experience at a budget-friendly price point. Specifications & Design
The CS-787 follows a classic 3-way layout, meaning it uses three specialized drivers to handle different parts of the audio spectrum. Woofer: 200 mm (approx. 8-inch) cone. Midrange: 77 mm cone. Tweeter: 66 mm cone.
Power Handling: Rated for a nominal/music power of 50/80 Watts at 8 Ohms. Frequency Response: 40 Hz to 20,000 Hz.
Cabinet: A bass-reflex design typically constructed from chipboard or LDF, often featuring a black or wood-grain vinyl finish. Performance & Reputation In the vintage audio community, the
is generally viewed as a "entry-level" or "mid-low level" floorstanding speaker.
Sound Profile: While some users appreciate their "warm tone" and nostalgic feel, critics often point out that the cabinets can be thin, leading to resonance or a lack of deep bass response compared to higher-end "Kabuki" style Pioneer speakers like the CS-99A.
Nostalgia Value: For many owners, these speakers are a "thrift store find" or a childhood relic that provides a "fun" listening experience, especially when paired with a vintage receiver. They are often recommended for casual vinyl listening rather than critical audiophile setups. Where to Find Them As a vintage product, you can typically find the on secondary marketplaces.
eBay often lists various models from the CS series, with prices for this specific model usually remaining affordable.
Facebook Marketplace and local thrift shops are also common places to spot them, as they were widely distributed in the 80s.
The Pioneer is a vintage floor-standing loudspeaker from the mid-to-late 1980s, typically recognized as part of a "rack system". While they offer a classic vintage aesthetic, they are generally viewed by audio enthusiasts as mid-to-low level entry-level speakers rather than high-fidelity components. Key Specifications & Design Configuration: 3-way loudspeaker system.
Power Handling: Rated at approximately 80W with a 6.3 Ohm impedance.
Build: Cabinets are typically made of chipboard or low-density fiberboard (LDF) with a wood-grain vinyl finish, rather than solid wood.
Drivers: Usually features a large woofer (often 10-12 inches), a paper cone midrange, and a paper cone tweeter. Sound Performance
Strengths: They are capable of playing loudly and are well-suited for "party" environments or casual listening in a garage or large basement. They can provide a "fun" sound with decent bass if powered by a substantial vintage amplifier. The Pioneer CS-787 is not for the measurement-obsessed
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
Pricing: On the secondary market, these typically sell for between $40 and $100 depending on condition. Some specialty vintage shops may list them higher (e.g., ~€315), but enthusiasts often consider anything over $100 to be overpriced.
Recommendation: They are great for nostalgia or a budget-friendly starter system. However, if you are looking for high-end "audiophile" sound, they may not meet your expectations compared to Pioneer's higher-tier lines like the HPM series.
Are you considering these for a primary listening setup or more for a casual/party space?
Title: The Apex of the Stone Age: A Technical and Historical Analysis of the Pioneer CS-787 Speaker System
Abstract The Pioneer CS-787, released in the late 1970s, stands as a quintessential example of the "Stone Age" era of Japanese audio engineering. Characterized by its massive cabinet size, multi-driver arrays, and distinctive granite-finish enclosure, the CS-787 represents a design philosophy that prioritized acoustic presence and aesthetic weight over the miniaturization trends that would follow. This paper explores the technical specifications, design philosophy, and enduring legacy of the CS-787 within the vintage Hi-Fi community.
1. Introduction The late 1970s is often referred to by audiophiles as the "Golden Age" or "Stone Age" of Japanese audio equipment. During this period, manufacturers like Pioneer, Sansui, and Kenwood competed to produce receivers and speakers of increasing power and physical size. Pioneer, a market leader, catered to a demographic seeking not only high fidelity but also furniture-grade aesthetics.
The Pioneer CS-787 was positioned near the top of Pioneer’s non-ES (Exclusive Series) speaker lineup. It was designed to mate with the era’s high-powered receivers (such as the SX-1250 or SX-1980) which required speakers capable of handling substantial wattage without distortion. The CS-787 is distinct for its incorporation of Pioneer’s "Granite" finish—a unique aesthetic choice that gave the speaker the appearance of hewn rock.
2. Design and Engineering Philosophy
2.1 The "Granite" Aesthetic The most immediately striking feature of the CS-787 is its cabinet finish. Unlike the walnut veneer or teak finishes common to the era, the CS-787 utilized a heavy, textured finish designed to mimic gray or speckled granite. This was not merely a visual choice; the thick, dense material contributed to the cabinet's rigidity and helped dampen resonance. Weighing approximately 46 pounds (21 kg) per speaker and standing nearly 28 inches tall, these units commanded a significant presence in a living room, designed to function as both audio equipment and substantial furniture pieces.
2.2 Driver Configuration The CS-787 utilizes a 4-way, 6-driver configuration, a complex arrangement typical of the era’s "more is better" mindset. This configuration includes:
2.3 Crossover Network Managing a 4-way system requires a complex crossover network. The CS-787 features level controls on the front baffle, allowing the user to adjust the output of the mid-range and high frequencies to compensate for room acoustics—a standard feature in vintage floor speakers that allowed for a degree of customization in the pre-digital equalization era.
3. Technical Specifications
4. Acoustic Performance and Characteristics From a modern audiophile perspective, the CS-787 offers a sound profile that is distinctly "vintage."
Critics of the era—and vintage enthusiasts today—note that while the CS-787 lacks the surgical imaging of high-end modern bookshelf speakers, it excels in dynamics and scale. It is particularly well-suited for genres such as jazz, rock, and orchestral music, where the physical impact of the instruments is paramount. The Verdict on Sound: The CS-787 sounds less
5. Market Context and Legacy The Pioneer CS-787 was arguably the apex of Pioneer’s consumer-grade "CS" series (excluding the Japanese domestic "Exclusive" brand). It was manufactured during a time when the audio industry was beginning to shift toward smaller, more "accurate" monitors like the LS3/5a, and eventually toward the subwoofer/satellite systems of the home theater era.
Consequently, the CS-787 and its siblings (like the CS-88) represent the end of an era where speakers were large, room-dominating fixtures.
6. Conclusion The Pioneer CS-787 remains a sought-after piece of vintage audio equipment. Its enduring appeal lies in its combination of robust over-engineering and unique aesthetic. While modern speaker design has largely abandoned the 15-inch multi-driver floor-standing format in favor of smaller, powered subwoofer configurations, the CS-787 offers a tactile and immersive listening experience that modern equipment often struggles to replicate without significant cost. As a representative artifact of the "Stone Age" of audio, the CS-787 stands as a testament to a time when Hi-Fi was a tangible, heavy, and commanding presence in the home.
References / Further Reading
Pioneer CS-787 is a rare, vintage 4-way speaker system crafted in Japan during the early 1970s, celebrated by audiophiles for its "FB" (Free-Beating) pulp cone drivers and classic walnut craftsmanship. The Story of the Pioneer CS-787
In the golden age of hi-fi, Pioneer engineers sought to create a speaker that could handle the warmth of vinyl while maintaining structural integrity over decades. The result was the CS-787, a "bookshelf" powerhouse that bridged the gap between fine furniture and precision audio engineering. The "FB" Innovation
: Unlike standard paper cones, the CS-787 utilized specialized "FB" pulp material in its 12-inch woofer and midrange drivers. This material was engineered to be stiffer with superior damping, producing a natural, "non-boomy" bass and an outstanding midrange presence that made vocals feel live in the room. Built to Last
: At a time when many speakers suffered from foam rot, Pioneer used high-quality cambric surrounds
for the drivers. This choice ensured that the CS-787 would not deteriorate, allowing many original units to remain in excellent condition today. The 4-Way Architecture
: It wasn't just about the bass. The system featured a complex 4-way design: : 12-inch cone for deep, solid lows. : 5-inch cone for clear presence. : 3-inch cone for crisp highs. Super Tweeter
: A multicellular horn type for ultra-high frequencies up to 20,000Hz. Aesthetic Presence
: Encased in hand-finished genuine walnut with a pleated saran grille, the
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 Pioneer CS-787! That's a classic bookshelf speaker from the 1970s. Here are some features of the Pioneer CS-787:
Key Features:
Additional details: