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Klipsch RB-81 vs Dynaudio Special Forty Comparison

Comparison and Difference Between

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Brand and Model Specifications

Information about the brand, model release date.

ModelRB-81Special Forty
Release Date20102018
What Hi-Fi? Rating -
Amazon Rating

Technical Specs

Technical characteristics of the speakers.

Amplification TypePassivePassive
Crossover Type2-Way2-Way
Enclosure typeBass ReflexBass Reflex
Frequency Range (+/-3 dB)[Hz]46 - 2300041 - 23000
Frequency Range (-6dB)[Hz]--
Maximum SPL [dB]--
Sensitivity (2,83 V/1 m)[dB]9786
Nominal Impedance (Ohms)86
THD (Total Harmonic Distortion)--
Recommended Amplifier Power [W]--
Crossover Frequency [Hz]18002000
Bass Reflex Tuning Frequency [Hz]--
Driver Units

Tweeter: 1″ (2.54cm) Titanium diaphragm compression driver mated to 90°x 60° square Tractrix® Horn
Mid/Bass Drivers: 8″ (20.3cm) Cerametallic™ cone woofer

Tweeter: 28mm Esotar Forty
Mid/Bass Drivers: 17cm MSP cone

InputsSingle WireSingle Wire
Magnetic ShieldingNoNo

Placements and Distances

Where and how to put them.

Form FactorShelf, StandShelf, Stand
Distance from Wall [cm]1515

Dimensions and Weight

Physical characteristics of the speakers (without stands).

Length~9.25 in
~234.95 mm
~23.5 cm
~7.8 in
~198.12 mm
~19.81 cm
Width~12.25 in
~311.15 mm
~31.12 cm
~12.1 in
~307.34 mm
~30.73 cm
Height~19 in
~482.6 mm
~48.26 cm
~14.2 in
~360.68 mm
~36.07 cm
Weight (Single Speaker)~30 lb
~13607.77 g
~13.61 kg
~17.9l lb
~8119.3 g
~8.12 kg
Shipping Weight~30 lb
~13607.77 g
~13.61 kg
~47 lb
~21318.84 g
~21.32 kg

Colors and Accessories

List of available colors and optional accessories.

  • Cherry woodgrain vinyl
  • Black Ash woodgrain vinyl
  • Red Birch High Gloss
  • Grey Birch High Gloss

Detachable GrillesNoNo

Price and Warranty

Satisfaction is (not) guaranteed.

Warranty5 Years2 Years
Amazon Price


Small print and stuff...

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