Wavecor MR120BD01 4¾" die cast, Kevlar/Carbon cone midrange 4 Ohm
The 4.75” transducers MR120BD01 (round, 4 ohm), is designed as high performance midrange units for high quality multi-way speakers.
Features
New cone of interwoven Kevlar/Carbon fibers, a new reference for the combination of low mass, rigidness, and damping - highly beneficial properties for midrange reproduction
Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
Vented, inverted center dome for reduced compression
Copper cap on center pole to reduce voice coil inductance and to minimize variations in voice coil inductance as a function of voice coil position
Rigid die cast alu chassis with extensive venting for lower air flow speed reducing audible distortion
Heavy-duty black fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
Large motor with 1” voice coil diameter for better control and power handling
Built-in alu field-stabilizing ring for reduced distortion at high levels
Low-loss suspension (high Qm) for better reproduction of details and dynamics
Black motor parts for better heat transfer to the surrounding air
Conex spider for better durability under extreme conditions
Gold plated terminals to ensure long-term trouble free connection
Specifications
power handling (continuous/programme) = 50 W
frequency range = 200-4000 Hz
resonance frequency fs = 72 Hz
impedance R = 4 Ohm
sound pressure level SPL = 86 dB (2,83V; 1m)
DC resistance Re = 3,2 Ohm
force factor BL = 4,2 N/A
voice coil inductance L = mH
effective piston radiating area Sd = 50 cm2
effective mechanical mass incl. air load mms = 5,7 g
equivalent volume of compliance Vas = 3,1 l
total Q factor Qts = 0,45 (Qms=8,5, Qes=0,47)
voice coil diameter = 26 mm
maximum peak linear excursion vibration xlin = +/- 1,5 mm
