Wavecor MR120BD01

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 x_lin = +/- 1,5 mm
• mounting diameter d = 100 mm
• overall diameter d = 120 mm
• mounting depth (not countersunk) t = 64 mm