As he promised, Guttenberg reviews the Eminent Technology LFT-8c.
Back in June I initiated a thread bringing to your attention the LFT-8b loudspeaker from Eminent Technology, and the review of it by Steve Guttenberg. In that review Steve mentioned he would be getting the LFT option of a new woofer section, this one being of dipole design (the 8b woofer is a sealed monopole), the new model designated as the LFT-8c. Below is a link to Steve’s new review of it.
The LFT-8b remains available at a price of $3200 (including shipping within the States), the new LFT-8c selling for $4500 shipped. The 8c woofer system includes a power amp for the front-firing 8" and rear-firing 6.5" woofers, and DSP for planar-magnetic panel/woofer integration.
Not mentioned in this new review is that Guttenberg greatly preferred the LFT-8b to not only the Magnepan MG1.7i, but also the MG3.7i, which retails for almost three times the price of the ET. Steve found the 8c to be even better than the 8b, the dipole woofer blending with the LFT planar-magnetic panels better than did the 8b’s monopole woofer (Magnepan themselves is still working on their upcoming dipole woofer system).
However, he found the 8c woofer to be good down to only 40Hz or so. Hey, 8" and 6.5" woofers can do only so much! And he didn’t like the sound of the DSP when engaged. The $1300 price-differential between the 8b and 8c may be justified, but there is another option:
Any dipole woofer system can be used in place of the 8b’s monopole woofer, it needn’t be the 8c system. A great alternative is the OB/Dipole Sub offered by Rythmik Audio in collaboration with GR Research. This woofer system consists of two (or three, your choice) 12" woofers mounted in a dipole "frame", powered by a Rythmik Audio plate amp (which also contains a dipole-cancellation compensation circuit). The only catch is that the woofer system is offered only in kit form, the user being required to mount the woofers in the frame. GR Research offers just such a frame in both DIY flatpack form and assembled (and even finished, if you wish). This woofer system offers bass reproduction of the bottom octave, with the same superior integration with the m-p panels as that of the 8c’s dipole woofer. The Rythmik Audio plate amp includes all the controls necessary for optimum blending of the panels to woofers, including a continuously-variable 0-180 phase control.
The combined price of the LFT-8b and Rythmik/GRR dipole wooer is still far below that of the MG3.7i, and imo is an outrageous bargain in today’s high end world of loudspeakers. Steve once again mentions he doesn’t like electrostatic loudspeakers, but finds the sound of the LFT-8b and 8c to match ESL’s in transparency, while beating them in dynamics and tonal density.
https://youtu.be/R4vC3V00-3Y
