Hello, HighRez. Speaker cabinet vibrations are absorbed, not deflected, by dBNeutralizer-based products such as Herbie's Cone/Spike Decoupling Gliders. Vibrations are not re-transferred back to the speaker cabinet. When coupling to the floor with spikes, whether hardwood/suspended or solid/concrete, some speaker-generated vibrations reverberate from the floor right back up the spikes the way they came, introducing glare, coloration, subtle out-of-phase dislinearity and other anomalies into the music. Speaker-generated floorborne vibrations can sometimes also infiltrate the audio rack and cause distortion within rack components. A host of other floorborne vibrations from acoustic sound waves, refrigerators, air conditioning and etc. also interfere with sonic integrity of speakers coupled to the floor.
Despite its drawbacks, coupling to the floor is always better than nothing at all, and considerably better than most decoupling materials like rubber or Sorbothane, which have resonance issues that adversely affect sonic linearity. Thus we have speaker manufacturers recommending spikes. However, in most cases isolation/decoupling with Herbie's dBNeutralizer-based products is even better. An abundance of customer feedback overwhelmingly indicate better bass definition, truer tonal texture with less glare/harshness, and subtle improvements throughout the audio spectrum compared to using just spikes.
Herbie's Audio Lab has experimented and auditioned extensively for more than a decade with audio vibration control, inventing unique materials and products for specific use with audio parameters. These products are not the result of conjecture or theory but rather of extensive trial/audition and have been proven over and over by actual results from more than 10,000 customers. Herbie's path is not so much a choice over manufacturers' recommendations but rather an augmentation of loudspeaker manufacturers' experience and expertise in the field.
Herbie's Audio Lab