While my recent purchase was the Pioneer CS-33 speakers, and not the higher-specified CS-33A, delving into their characteristics offers valuable insights, especially for those interested in vintage audio and speaker modification. The Pioneer CS-33A stands out as a more sophisticated system, boasting a 35-watt rating compared to the CS-33’s 25 watts, indicating a step up in performance and design within the Pioneer lineup of that era.
One immediately noticeable difference between the models is the grill. The CS-33A features a removable, elaborately designed grill, appealing to those who appreciate a touch of vintage elegance and functionality. In contrast, the CS-33 sports a non-removable grill, which, in its simplicity, might align better with modern minimalist aesthetics. Despite this visual distinction, both the CS-33 and CS-33A share a commitment to quality cabinet construction, utilizing furniture-grade plywood rather than MDF, and finished with a genuine walnut veneer, not a vinyl substitute. Even though positioned as a more accessible model, the CS-33 maintains a high standard of craftsmanship, reflecting Pioneer’s dedication to quality across their product range.
Examining the internal components further reveals similarities and subtle differences. Both speaker cabinets are designed around 8-inch woofers. The crossover network in both the CS-33 and CS-33A is a relatively simple design, featuring a single capacitor and two inductors. While the exact circuit topology and component values remain unspecified, its inclusion suggests a functional design aimed at effectively directing audio frequencies to the appropriate drivers.
From a structural perspective, both models are ported designs, but they diverge in port geometry. The CS-33A employs a traditional round port, whereas the CS-33 utilizes a slot port. The author’s observation about the CS-33’s port size being potentially large suggests a consideration for acoustic tuning and performance characteristics, highlighting the nuances in design even between closely related models.
The appeal of cabinets like the Pioneer CS-33 and CS-33A extends beyond their original configurations. Their robust construction, featuring plywood and walnut veneer, makes them ideal candidates for refurbishment and customization projects. Unlike vinyl-covered MDF, wood veneer over plywood allows for refinishing, offering a pathway to restore or alter the cabinet’s appearance. This durability and refinishability are significant advantages for enthusiasts looking to integrate modern speaker components into vintage enclosures. The author’s specific search for refinishable cabinets underscores a practical approach to audio upgrades, prioritizing longevity and aesthetic adaptability.
For those exploring solid vintage cabinets for rebuilds, the Pioneer CS-NNA series, encompassing models like the CS-33A, CS-66A, CS-77A, and CS-99A, presents a compelling option. These models, distinguished by increasing levels of sophistication, consistently feature furniture-grade plywood and real wood veneers. This commonality in construction material ensures that, like the CS-33A, they can be refinished with excellent results, making them a valuable resource for DIY audio enthusiasts and those seeking to blend vintage aesthetics with contemporary sound technology.
