One Synergistic Research HFT High Frequency Transducer Speaker Kit in a very good condition. HFT speaker Kits come with 2 Standard HFT’s 2 HFT 2.0’s and 2 HFT X’s which is enough to treat one speaker. The combination of the 3 HFT types is ideal for most speakers. With easy to follow placement guidelines you will dramatically improve your speakers ability to disappear in your room with tighter bass, improved mid-range clarity, and smoother more articulate highs. For a pair of speakers you need two Speaker Kits, the Kit we offer is for one speaker only. Using a combination of HFT’s, HFT 2.0’s and HFT X’s allows your speakers to disappear and blend into your room providing the most life-like soundstage possible. This kit tackles the problem of surplus HFTs when buying them in normal packs. HFT 2.0 and HFT X take the HFT concept to exciting new levels. The HFT 2.0 is a warmer sounding transducer and HFT X has more details and resolution and both are intended to be used in conjunction with the original HFTs. What they do: Tunes speaker cabinet resonances, Expands soundstage height, width and depth, Extends and clarifies high frequencies, Improves low frequency extension and bass control, Lowers noise floor for improved inner detail and micro-dynamics. Retail price is 299 euro. The original box and manual are included. Check our other listings for more interesting items. Free shipping worldwide!