Russell K RED150 Loudspeakers

New product


  • Build upon the RED50 and RED100
  • Floorstanding design
  • On demo at MCRU
  • Initially available in piano black finish

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We have these speakers on demonstration in our showroom in Huddersfield. We often wonder why hi-fi dealers need to stock 20 different brands of speakers. The Russell K range appeal to every type of audiophile and suit almost any room/situation. They are a pleasure to listen to.

Russell K   Red 150 Precision Audio Loudspeaker System

Designed in the UK | Manufactured in Europe ( Poland)


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


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

Both 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)


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