Two sets of ten Synergistic Research HFT High Frequency Transducers in a fantastic condition. Retail price for one set is 499 euro, now for 349 euro for one set. The original HFT’s will make up the bulk of your HFT acoustic treatment. Most rooms are recommend to start with 15-20 standard HFT’s. Your speakers and room will disappear as your soundstage expands into a realistic and holographic representation of the musical event with improved frequency response from top to bottom. Please check our other items. Free shipping worldwide!