I’m a bit late here (by a few years
). I would like to provide my review for the modded Beolab 4000’s…
UPSIDES:
Massive improvements in terms of holographic 3D soundstage with instruments floating pinpoint/solid in the air in front of you. Voices are bang in the middle, you would swear that there is a centre speaker in the room (not joking! I had to keep checking). With well recorded music, and connected to a Beosound Core; the bass has more weight. There is more definition in treble, midrange and bass. There is also more ability to turn the volume up higher, without the sound falling apart (my DIY 4AWG copper power cables definitely help here). The built in analogue power amps (after modifications) are seriously high end sounding.
DOWNSIDES
Sound hollow and pinched when played from cold. Need at least one hour of music playback before these shortcomings disappear. The weird shaped cabinet is responsible for causing a degree of midrange coloration which manifests itself as ‘boxiness’. This is only evident with ‘talking voices’ like for example a radio channel commentator. Other than that; it is not noticeable during music playback.
FINAL THOUGHT… I would recommend using 18 AWG solid core copper wire for the bass midrange driver instead of 16 AWG. The result being that midrange sounds slightly more natural, while at the same time bass response is better balanced and integrated.
