GRS K-33-4 Replacement 15" Woofer for Klipsch Speakers

The GRS K33 is a 1:1 drop-in replacement for the Klipsch K-33 woofer designed to bring your old Klipsch heritage cabinets back to life! With the same suspension and cone characteristics as the original K-33, this driver performs and will retain the same crossover point, tone, and quality when used with the Klipsch crossover networks in a variety of cabinets.

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Product highlights:

• Drop-in 4 Ohm replacement woofer for the popular Klipsch K33
• Fits popular Klipsch Heritage Cabinets: Klipschorn, Belle Klipsch, Cornwall, Lascala
• Perfect visual match for restored Klipsch cabinets
• Triple-roll surround and paper cone provide a perfect tonal match
• Replacement for K-43-E, K-33-B, K-33-J, K-33-K and more

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Product details

GRS K-33-4 Replacement 15" Woofer for Klipsch Speakers

The GRS K-33 was designed to have the same performance in free-air as the original in order to have the same performance in-cabinet for worry-free replacement.

The engineers at GRS understand that while performance is important when selecting replacement drivers for a restoration project, aesthetic is close behind in what dictates an appropriate replacement. Using the same materials and colors for paper cone, dustcap, and triple-roll surround, down to the design of the stamped frame, GRS guarantees mis-matched components won't get in the way of enjoying your favorite Klipsch heritage cabinets.

DIY-ers who do not own any of the classic cabinets will appreciate the high-sensitivity and subdued midrange for easy crossover and cabinet design.

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Technical Specifications:

• Article number K-33-4
• Woofer Type Subwoofer
• Nominal Diameter 15"
• Power Handling (RMS) 200 Watts
• Power Handling (max) 400 Watts
• Impedance (Z) 4Ω
• Sensitivity (SPL at 1m / 2.83V) 97 dB
• Frequency Response 33-5500Hz
• Voice Coil Diameter 2"
• Magnet Weight 59oz.
• DC Resistance (Re) 3.52Ω
• Voice Coil Inductance (Le) 1.129mH
• Resonant Frequency (Fs) 32.2 Hz
• Mechanical Q (Qms) 12.61
• Electromagnetic Q (Qes) 0.5458
• Total Q (Qts) 0.52
• Diaphragm Mass Inc. Airload (Mms) 91.55g
• Mechanical Compliance of Suspension (Cms) 0.267mm/N
• Surface Area of Cone (Sd) 855.3cm²
• BL Product (BL) 10.93T·m
• Compliance Equivalent Volume (Vas) 9.68ft³
• Maximum Linear Excursion (Xmax) 8.25 mm
• Cone / Diaphragm Material Paper
• Surround Material Paper
• Voice Coil Wire Material Copper
• Voice Coil Former Aluminum
• Basket / Frame Material Steel
• Magnet Material Ferrite
• Overall Outside Diameter 15.11"
• Overall Depth 5.82"
• Baffle Cutout Diameter 13.85"
• Bolt Circle Diameter 14.65
• # Mounting Holes 8