Russell K Red 120SE Floorstanding Loudspeaker

‎New tweeter crossover design
The new tweeter has a higher output, so an adjustment was necessary to the shape of the response curve to match the output of the bass/mid driver. At the same time, this allowed an opportunity to fine tune the speaker to sound even more realistic. All without changing the excellent phase response so important for music to time well.
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New sub bass coil
A bigger coil, both in value and size, built with a larger frame and thicker wire. Plus, there are now two of them: one in the positive signal path and a second in the negative return path. This creates a balanced circuit, allowing an improvement in “bass tunefulness”. The result is a speaker that is easier to place in your listening room, maintaining a tuneful bass. This completes the picture by adding more drama to the bass, all while maintaining the significant bass extension quality of the standard RED 120.

New plinth and spikes
The interface between the floor of the listening room and cabinet of a loudspeaker is critical to its real-world performance, especially with there being so many variations in floor finish – from wood, carpet, concrete, and everything in between. By adding a polymer insert to the double plinth system of the standard RED 120 results in a sophisticated plinth of differing materials, thus meaning isolation from the floor is significantly improved. Bass performance is an obvious beneficiary, but soundstage, coherence and dynamics are also enhanced. This is again all further bettered with the SE’s Improved spikes.

*Other RED 120SE specifications are the same as the RED 120.

Cabinet

Dimensions H- 860mm (910mm including plinth, base and spikes) W-200mm D-190mm
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 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 1800Hz 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 22Hz-25KHz (dependent on room)

Sensitivity: 86db 1 watt 1 Metre