Russell K.


Russell K Red 50 Precision Audio Loudspeaker System

Designed in the UK

Manufactured in Europe (Poland)


Cabinet

Dimensions H- 310mm W-205mm D-200mm

Construction 16mm MDF all sides apart from front baffle which is 19mm.

Totally undamped cabinet

1 acoustic loading bracing shelf with multiple (8) apertures mounted above the woofer

Reflex port loading tuned to 55Hz


Drive units

5” Bass unit with impregnated paper cone and curved optimised acoustic profile

High power Ferrite magnet driving a 25mm voice coil with aluminium former and Faraday distortion cancelling copper ring

25mm soft dome tweeter

Single Ferrite magnet system

Copper Clad Aluminium voice coil wire on a Fibreglass Former and Faraday distortion cancelling copper ring


Crossover

Drivers connected in positive phase crossover frequency 2200Hz nominal 12 db/Oct

Bass Inductor “Enclosed Field Ferrite Core” Very low DCR nominal stray fields

Tweeter attenuation by misaligned Zobel network as opposed to conventional L-Pad

Both Drivers have only one component in the signal path

Phase optimised through the crossover region

In room frequency range 45Hz-22 KHz


Russell K Red 100 Precision Audio Loudspeaker System

Designed in the UK

Manufactured in Europe ( Poland)


Cabinet

Dimensions  H- 400mm  W-260mm D-270mm

Construction 16mm MDF all sides apart from front baffle which is 19mm.

Totally undamped cabinet

2 acoustic loading bracing shelves with multiple apertures  mounted above and below the woofer

Reflex port loading tuned to 35Hz


Drive units

6.5” Bass unit with impregnated paper cone and curved optimised acoustic profile

High power Ferrite magnet driving a 25mm voice coil with aluminium former and Faraday distortion cancelling copper ring

25mm soft dome tweeter

Double Ferrite magnet system

Copper Clad Aluminium voice coil wire on a Fibreglass Former  and Faraday distortion cancelling copper ring


Crossover

Drivers connected in positive phase, crossover frequency 2200Hz nominal 12 db/Oct

Bass Inductor “Enclosed Field Ferrite Core” Very low DCR nominal stray fields

Tweeter attenuation by misaligned Zobel network as opposed to conventional L-Pad

Both Drivers have only one component in the signal path

Phase optimised through the crossover region

In room frequency range 30Hz-20KHz


Russell K Red 150 Precision Audio Loudspeaker System

Designed in the UK

Manufactured in Europe ( Poland)


Cabinet

Dimensions  H- 950mm (1000mm including plinth, base and spikes) W-240mm D-250mm

Construction 16mm MDF all sides apart from front baffle which is 19mm.

Totally undamped cabinet

3 acoustic loading bracing shelves with multiple apertures, mounted below the tweeter, below the bass mid driver and below the sub bass driver

1 bracing shelf mounted near the bottom of the enclosure containing an internal port

Internal port vents into a small chamber containing 2 asymmetric length reflex ports tuned as a system to 21Hz


Drive units

2 x 6.5” Bass units with impregnated paper cone and curved optimised acoustic profile

High power Ferrite magnet driving a 25mm voice coil with aluminium former and Faraday distortion cancelling copper ring

25mm soft dome tweeter

Double Ferrite magnet system

Copper Clad Aluminium voice coil wire on a Fibreglass Former and Faraday distortion cancelling copper ring


Crossover

All drivers connected in positive phase

Sub bass driver starts roll off at 80Hz 6db/Oct fed by “Enclosed Field Iron Core Inductor”. Features high power without saturation, very low DCR and almost no stray magnetic field

Bass/Mid driver crossover frequency 2200Hz nominal 12 db/Oct. Utilises an “Enclosed Field Ferrite Core Inductor “in the signal path. Very low DCR nominal stray fields

Tweeter attenuation by misaligned Zobel network as opposed to conventional L-Pad

All Drivers have only one component in the signal path

Phase optimised through the crossover region

In room usable frequency response 20Hz-22KHz (dependent on room)

Sensitivity: 87db 1 watt 1 Metre