Desconozco lo del filtro.

Características técnicas:

Technical Specifications : LCR600 S3
Monitor compacto Bass-reflex de 2,5 vias/ 3 altavoces
Description 2.5-way vented-box system with magnetic shielding
Dimensions Height: 204mm (8in)
Width: 545mm (21.8in)
Depth: 311mm (12.2in)
Net Weight 12.5kg / 27.5lb
Freq. Response 60Hz - 22kHz ± 3dB on reference axis
Freq. Range -6dB at 48Hz and 42kHz
Sensitivity 89dB spl (2.83V, 1m)
Normal Impedance 8 ohms (minimum 3.0 ohms)
Power Handling 25W - 150W into 8 ohms on unclipped programme
Drive Units Unit 1: 1x 25mm (1in) metal dome high-frequency
Unit 2: 1x 165mm (6.5in) woven Kevlar® cone bass/midrange
Unit 3: 1x 165mm (6.5in) woven Kevlar® cone bass
Finish Cabinet: Black Ash or Sorrento (light oak) vinyl
Grille: Black Cloth
Dispersion Description: Within 2dB of response on reference axis
Horizontal: over 40° arc
Vertical: over 20° arc
Harmonic Distortion 2nd & 3rd harmonics <1% 70Hz - 20kHz (90dB spl, 1m)
Crossover Frequency 300Hz, 4kHz
Max. Recommended Cable Impedance 0.1 ohms

Technical Specifications : DM602 S3
Monitor Bass-reflex de 2 vias
Description 2-way vented-box system
Dimensions Height: 490mm (19.3in)
Width: 236mm (9.3in)
Depth: 293mm (11.5in)
Net Weight 10.5kg / 23.1lb
Freq. Response 49Hz - 22kHz ± 3dB on reference axis
Freq. Range -6dB at 40Hz and 42kHz
Sensitivity 90dB spl (2.83V, 1m)
Normal Impedance 8 ohms (minimum 3.0 ohms)
Power Handling 25W - 120W into 8 ohms on unclipped programme
Drive Units Unit 1: 1x 25mm(1in) metal dome high-frequency
Unit 2: 1x 180mm (7in) woven Kevlar® cone bass/midrange
Unit 3:
Finish Cabinet: Black Ash or Sorrento (light oak) vinyl
Grille: Black Cloth
Dispersion Description: Within 2dB of response on reference axis
Horizontal: over 40° arc
Vertical: over 10° arc
Harmonic Distortion 2nd & 3rd harmonics <1% 60Hz - 20kHz (90dB spl, 1m)
Crossover Frequency 4kHz
Max. Recommended Cable Impedance 0.1 ohms

Esto es lo que he conseguido buscando por internet.
Pero no lo tengo nada claro.

Un saludo.