TMD - TUNED MASS DAMPER

THE OBSESSION WITH THE MIDRANGE

The midrange register is no doubt the most complicated to control in a sound system. On one hand, there must be a smooth transition with the bass. On the other hand, it must be tuned to the tweeter in terms of dispersion and acceleration. This determines the homogeneity of the timbre and spatialisation.

For the past 20 years, we have been working on mastering the "break up" (the frequency at which the cone becomes deformed, leading to distortion) of our 3rd generation "W" cones and on drastically reducing the resonance of the tweeter with the IAL 2. Today, thanks to the power of finite element analysis, our teams have developed simulation software to visualise the dynamic behaviour of the suspension which connects the cone to the basket, thus revealing the performance issues requiring attention.

TUNED MASS DAMPER

Following the discovering of these issues, we had to conceive the equipment to solve them. The solutions already known for increasing the damping properties of the suspension all result in an increase of the mass which consequently alters definition. The answer came from a technology used in earthquake-resistant skyscrapers and which is also used for the suspension on racing cars! This technology is called a "Tuned Mass Damper": an additional mass oscillate in opposition to the resonance frequency to control it.

Applied to the speaker driver, the solution consists in simply two tubular rings on the suspension whose dimensions and position have been judiciously determined. They form our Tuned Mass Damper (TMD) and they stabilise the dynamic behaviour of the surround according to resonance, thus avoiding deformation of the cone without afflicting the dynamics. This innovation is patented.

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VISUAL ANALOGY OF THE SURROUNDS 

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Our Tuned Mass Damper (TMD) consists of two tubular rings moulded onto the surround. On the left the default suspension, on the right, the TMD suspension. This simple solution, perfected thanks to our new software, stabilises the dynamic behaviour of the surround according to resonance, thus avoiding deformation of the cone without afflicting the dynamics.


Focal SHAPE TWIN

FO-SHAPETWIN
£0.00 £749.00 inc. VAT
£624.17 exc. VAT

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SHAPE TWIN

Shape Twin is the latest edition to Focal's revered Shape range and features the same M-shaped Aluminium/Magnesium inverted dome tweeter, passive radiator design and revolutionary flax/glass drivers. The Shape Twin's unique 2.5-way design equips the monitor with extended bass control in low/mid range registers, a particularly useful attribue in smaller mixing spaces. Its broad frequency response and high SPL offers a detailed portrayal of the whole audio array to ensure the most versatile mixing experience possible.



Features
  • Tweeter with very low directivity for a exible sweet spot
  • Designed without a port (double passive radiator) allowing it to be placed near a wall
  • 2.5 channels to provide optimal control of bass and low mid-range registers
  • Numerous settings for optimal integration
  • Accurate control, even in the very high frequencies
  • Flax sandwich cone: controlled and articulated bass, natural and detailed lower mid-range and upper mid-range registers
  • Fastening mechanisms for mounting to the ceiling or a wall (fastening accessories not supplied)
Specifications
Balanced Input
XLR 10 kΩ
Unbalanced Input
RCA connections 10kΩ with sensitivity compensation
HF Shelving (4.5 - 35kHz)
Adjustable, +/-3dB
LF Shelving (35 - 250Hz
Adjustable, +/-3dB
EQ Low-Mid Frequencies (160Hz, Q factor = 1)
Adjustable, +/- 3dB
High Pass Filter
Adjustable full range 45/60/90Hz
LED (Front Panel)
Power off/on/standby
Amplifier HF
1x 50W, Class AB
Amplifier LF
2x 80W, Class AB
Power Connection
IEC inlet and detachable power cord
Power Supply
220 - 240V / 100-120V switchable (T2AL-250V / T3.15AL-250V fuse)
Frequency Response
40Hz - 35kHz (+/- 3dB)
SPL
110.5dB SPL (peak at 1m)
Dimensions
478 (H) x 211 (W) x 279 (D) mm
Weight
11kg
HF
1x 'M'-shaped Aluminium/Magnesium tweeter
LF
2x 5" Flax Cone woofers