The Klipsch Heresy HBR (Heresy Birch Raw) speakers, produced from the late 1960s to the late 1970s, are known for their raw birch cabinet finish and classic design. Key specifications include a 12" woofer, K-55 horn midrange, and K-77 horn tweeter. These 3-way, 3-driver speakers have a 50Hz-17kHz frequency response, 8-ohm impedance, and a sensitivity of 99 dB

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Detailed Specifications:

• Drivers: 12" woofer, K-55 horn midrange, K-77 horn tweeter.
• Cabinet: Raw birch (unfinished wood).

• Impedance: 8 ohms nominal.

• Frequency Response: 50Hz - 17kHz (±5 dB).

• Sensitivity: 99 dB @ 1 watt / 1 meter.

• Recommended Power: 20 - 100 watts.

• Dimensions (approximate): Height: 54.3 cm (21 3/8"), Width: 39.5 cm (15½"), Depth: 33.4 cm (13 1/8") according to Klipsch.

• Weight: 25 kg (55 lbs).

• Years of Production: Late 1960s - Late 1970s.

• Network: Type E-700/6000 Hz according to Klipsch.

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