Synergistic Research HFT Room Speaker Tuning Accessory

Controls unwanted resonance from walls and furniture using 'ultrasound.' A small acoustic processor that corrects musical timing and phase in real time.

The biggest cause of muddied sound in an audio system is not the equipment but the 'room' itself. All objects, such as walls, windows, and furniture, react to the sound pressure from speakers, resonate, and produce noise that spoils the music. Synergistic Research's HFT (High Frequency Transducer) was developed to solve these acoustic distortions fundamentally, despite being extremely small, about the size of a shirt button.

Main Features

• Real-Time Phase-Locked Energy
  The HFT reacts instantly to the sound pressure, electromagnetic energy, and RF (high frequency) of music. Before objects in the room start producing unpleasant sounds 'late,' the HFT emits phase-locked energy synchronized with the music. It organizes the phase structure of the entire listening room and guides the brain to process music more accurately.
• Control of Resonance, Not Absorption
  Conventional absorbers kill both the energy and the reverberation of music, but the HFT tunes the room using analog resonance. By eliminating only muddiness while preserving a "live" resonance like a concert hall, it creates a vast soundstage as if the walls have disappeared.
• Surprisingly Easy Setup
  Simply attach to the wall or speakers with the dedicated adhesive. No complicated measurements or large-scale construction are required. You can achieve an acoustic space worthy of a high-end system without compromising the aesthetics of your listening room.

Version Introduction (HFT Lineup)

By combining the following HFTs according to the system and room conditions, you can achieve the ideal tone balance.

HFT Standard
This model is the core of acoustic treatment. It erases the existence of speakers and rooms and creates a three-dimensional, holographic sound field that makes it seem as if the musical event is being recreated right before your eyes.

HFT 2.0
By adding it to your existing HFT environment, you can add warmth and musicality to your music. Perfect if you feel the system is a little too analytical.

HFT
"Focus", "Resolution", "holographic soundstageThis is a model to emphasize ``. It makes the contours of the sound image clearer and improves the reproduction of subtle ambient sounds.

HFT Wide Angle
It has a wider and more powerful diffusion pattern, dramatically improving the immersion in the sound field. Effective in expanding the scale and depth of the sound stage.

HFT Speaker Kit Mk II
A 14-piece HFT set designed specifically for speakers. By asymmetrically arranging six types of precisely tuned HFT, the speaker itself disappears and brings out overwhelming realism and expressive power that appeals to emotion.

Operational advice

• Recommended step up
  We recommend starting with 15 to 20 HFT Standards. After that, you can use HFT 2.0 to moisturize or improve resolution with HFT X to find the perfect balance, depending on your system's tendencies.
• Synergy with Vibratron SX
  HFT is powerful on its own, but when combined with the company's Vibratron SX and Black Box Carbon, it completely controls the acoustic characteristics of the room and enables a different-dimensional listening experience.

HFT Setting Guide: 4 steps to the ideal acoustic space

To maximize the effectiveness of HFT, we recommend implementing it gradually by following the steps below. First, build the foundation with "Standard" and adjust the tone and resolution as necessary.

Step 1: Create an acoustic foundation with Standard HFT
This is the base step for everything. 5 pieces a pairWe will add the sets one by one.

Level 1 (first 5 pieces):

1. Center wall between left and right speakers (medium height)
2. Front left corner of the room (medium height)
3. Position more than 60 cm higher than (2) above
4. Front right corner of the room (medium height)
5. Position more than 60 cm higher than (4) above

Level 2 (the next 5):

• Expand the placement to the center between the speakers (low), the left and right side walls (halfway between the speaker and the listening point), the center of the ceiling, and the center of the back wall (high position).

Level 3 (5 more):

• Place it on the side wall behind the listening position, on the front wall, and lower on the back wall to complete the 360-degree sound field.

Step 2: Add HFT 2.0 to create "warmth"
If you feel that the system is a bit too analytical, add HFT 2.0 to give it musical richness and warmth.

Level 1 (first 5):

• Place them on either side of each speaker. Tweaking the position "downward" will give it a warmer tone.
• Replace the Standard HFT in the lower position of the front center with 2.0.

Level 2 (the next 5):

• We will gradually replace the existing Standard HFT placed on the walls and ceiling with 2.0. When replacing it, it is important to move it to a position closer to the ceiling than to its original position.

Step 3: Add HFT X to Master Resolution and Focus
This is used when higher transparency, resolution, and pinpoint sound localization are required.

Level 1 (first 3):

• Replace the HFT in the center of the front with the HFT X and move it closer to the ceiling.

Level 2 (the next 3):

• Place it on the top surface of each speaker.
• Place it on the underside of the existing HFT on the back wall and fine-tune the position to your liking.

Step 4: Achieve a "vast stage" with HFT Wide Angle
Add it as a finishing touch to a room that has already been treated with HFT. The wide diffusion pattern dramatically increases the scale and immersion of the sound field.

Level 1 (Usage depending on the installation environment):

Level 2 (further expansion):

Setting Tips

• Millimeter Adjustment: The basic effect is as guided, but there are moments when the sound field is perfectly fixed with fine adjustments in a few millimeters.
• Phased implementation: By proceeding while checking the changes in the sound for each set, rather than changing them all at once, it will be easier to find your ideal tone balance.

Overseas reviews and ratings & Testimonials)

The Absolute Sound 
He highly praises its effectiveness, saying, ``At first glance, it seems like occultism (Voodoo), but it definitely works.''

• Transformation of space: It has the effect of making a small listening room feel like a large room, and making giant multi-way speakers disappear from the space like small monitors.
• Lower noise floor: Noise is dramatically reduced, giving recordings more detail, definition, and sound field boundaries.
• Practicality: You can get the feeling of physically expanding the boundaries of the room (Boundary Expansion) without using huge acoustic panels.

Positive Feedback
``Once you experience it, you will never be able to go back to the state without HFT,'' which emphasizes its highly addictive improvement effects.

• Immediate effect and impact: The change was so dramatic that there was an anecdote (Wife Test) about how, after the installation was complete, his wife was speechless the moment she entered the room and sat down, immersed in the music.
• Improved resolution: Even with mediocre recordings, the sound image is stable and the contours are extremely sharply defined.
• holographic soundstage: An overwhelming “holographic soundstage” and “immediacy” is born.
• Improved texture: The midrange becomes thicker, and the high end changes to a smooth, liquid texture without losing its sharpness.

Audio Bacon 
The Editor's Choice Award focuses on HFT's ``cumulative effects'' and ``adjustment through variation.''

Auditory changes: You can hear that the "room itself" begins to change immediately after installation.

Roles by Model:

• Standard: Organizes the sound field and provides a foundation for focus.
• 2.0: Adds "warmth" and "musicality" to the sound without compromising resolution.
• Wide Angle: Further expands the scale and immersion of the sound field.

Holistic Changes: Even though each change is subtle, when tuning is progressed across the entire system, it ultimately leads to a significantly improved sound quality.

Stereo Times: 
They have given it the highest praise, calling it "the product that brought the biggest improvement to my system in the past 11 years of reviewing."

• Status as a Reference: An indispensable presence as the "reference (standard)" for one's own system.
• Three-dimensional Depiction: The layering of instruments and the three-dimensionality of images (Bloom) are improved, creating an effect where the sound field envelops the entire listening room like surround sound.
• Realism of Instruments: The complex harmonic structure of the piano is accurately reproduced, giving the illusion that the real instrument is present.
• Low-Frequency Control: Although it is a high-frequency device, it also contributes to tightening and enhancing the quality of low frequencies.

Summary: Common Evaluation Points

There are three points consistently observed across all media:

• "Speakers disappear": A vast sound field that makes the physical enclosure unnoticed.
• 「"Noise removal": Murkiness (hash) that was subconsciously perceived disappears, improving transparency.
• "Immersion into musicality": An experience of being drawn into the music itself, rather than listening analytically.

These are not mere accessories but are positioned as essential tools to tune the "room, the largest component."