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Fortissimo FF2.5 Full-Range Speaker
SKU:  FF2.5

FF2.5

SKU:  FF2.5

Technical Highlights

  • 60W RMS power at 4 ohm impedance, ideal for precise sound.
  • Sensitivity of 87.9 dB, 2.5" full-range, fiberglass diaphragm.
  • Neodymium magnet, 20mm aluminum voice coil, damped pole piece vent.
  • More technical details
€160,00
€160,00 €160,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Delivery
Jun 5, - Jun 8,
x pair
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FF2.5 by Fortissimo

The Fortissimo FF2.5 is a Full-Range Speaker made in Italy with an outer diameter of 78 mm or 2.5 inches and an impedance of 4 Ohms. The technical design includes a specially black-coated fiberglass diaphragm as well as a conical fiberglass dust cap. This dust cap is directly glued to the 20 mm aluminum voice coil. A neodymium magnet with a copper cap on the pole core and a damped pole core bore serves as the drive. The speaker is optimized for operation in FreeAir or closed enclosures starting from a volume of 0.2 liters. The nominal power handling is 60 Watts RMS when using a high-pass filter. The efficiency is 87.9 dB/2.83V/1m.

Features
  • Full-Range Speaker
  • 2.5 inches (78 mm) diameter
  • Power: 60 Watts RMS
  • Impedance: 4 Ohms
  • Black-coated fiberglass diaphragm
  • Conical fiberglass dust cap
  • 20 mm aluminum voice coil
  • Neodymium magnet with copper cap
  • Damped plastic basket
  • Enclosure recommendation: Closed 0.2 liters to 0.4 liters
  • Alternative: Bass reflex 1.5 liters with 80 cm² port and 13 cm length
Technical Specifications
  • Efficiency: 87.9 dB/2.83V/1m
  • Resonance frequency (fs): 140 Hz
  • Total Q factor (Qts): 0.63
  • Equivalent volume (Vas): 0.5 liters
  • Linear excursion: 1.5 mm per direction
  • Outer diameter: 78 mm
  • Mounting diameter: 69.0 mm
  • Mounting depth: 25 mm

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Frequently Asked Questions about FF2.5

What is the efficiency of the FF2.5 speaker?

The FF2.5 from Fortissimo offers an efficiency of 87.9 dB/2.83V/1m. This means that the speaker efficiently converts sound energy into audible sound, providing an excellent listening experience. A high efficiency is particularly relevant when you want to listen to music with low amplifier power, as the FF2.5 sounds dynamic and clear even at lower levels. Differences in efficiency are especially noticeable with complex musical pieces, where a speaker with lower efficiency might lose details and dynamics. The value of 87.9 dB ensures that the FF2.5 can deliver outstanding acoustic performance without requiring enormous amplifier power.

What technical features characterize the FF2.5 speaker?

The FF2.5 full-range speaker from Fortissimo features a 4-ohm impedance and a specially coated fiberglass diaphragm. It has a 20 mm aluminum voice coil that is directly bonded to a conical fiberglass dust cap. The integrated neodymium magnet with a copper cap on the pole core and the damped pole core bore enhance sound precision. You benefit from a speaker-optimized transport that can also be used in small enclosures starting from 0.2L or in FreeAir configuration. The FF2.5 complements various sound systems thanks to its compact design, reinforced plastic basket, and a membrane that extends linearly in both directions by 1.5 mm.

How do I install the Fortissimo FF2.5 in my car?

The FF2.5 speaker can be easily integrated into various vehicle types due to its compact dimensions. With an outer diameter of 78 mm and a mounting depth of 25 mm, it fits into many factory speaker openings without major adjustments. Check the existing mounting diameter, which is exactly 69.0 mm for the FF2.5. If you have more complex audio architectures in your vehicle, the neodymium magnet can help without taking up much space. Always pay attention to the possible open-air or enclosure integration, as this can influence the final sound experience. The high flexibility in installation allows for easy adjustment to the respective seating position and sound preferences.

What applications does the FF2.5 speaker offer?

The FF2.5 is versatile, suitable for both free-air installations and closed enclosures starting from 0.2L volume, ideally 0.4L. This range of applications allows for great flexibility in use. Particularly advantageous is the speaker's adaptability to different environments, allowing you to select the speaker based on available space and desired sound profile. Integration into a bass reflex enclosure of 1.5L with an 80cm² port and a length of 13 cm is also possible if you value deeper bass reproduction. This gives the FF2.5 a wide acoustic range that is resilient and adaptable.

What are the special features of the membrane of the FF2.5 speaker?

The FF2.5 from Fortissimo features a specially black-coated fiberglass membrane that ensures outstanding stability and durability. This membrane is not only visually appealing but also offers clear acoustic advantages due to its stiffness and lightness. The construction dampens unwanted vibrations and promotes precise sound reproduction. This is complemented by the conical fiberglass dust cap, which is directly connected to the voice coil. This targeted design optimizes membrane movement, reduces distortion, and allows for optimal frequency balance. Especially for speakers of 78 mm size, the choice of material is crucial for sound quality.

How does the aluminum voice coil affect the performance of the Fortissimo FF2.5?

The 20 mm aluminum voice coil of the Fortissimo FF2.5 significantly contributes to power generation by directly converting electrical energy into vibrations. Aluminum as a material offers crucial advantages: it is lightweight and can withstand high temperature fluctuations. This means that the coil ensures a smooth and precise movement of the diaphragm, even with more intense musical pieces and high volumes. The low mass reduces inertia and allows for more efficient energy transfer, which is particularly evident in a detailed sound reproduction. In combination with the neodymium magnet, this creates a balanced sound characteristic that is effective both at low and high listening levels.

What do the Thiele-Small parameters mean for the FF2.5?

The Thiele-Small parameters fs, Qts, and Vas are fundamental data to understand the acoustic performance of the Fortissimo FF2.5. The resonance frequency (fs) is specified at 140 Hz and defines the lowest frequency that the speaker reproduces efficiently. A Qts value of 0.63 indicates the transmission range and influences the enclosure design. Vas of 0.5L describes the equivalent volume of an air spring that supports diaphragm movement. Together, these parameters help to optimally tune the speaker to your specific requirements, whether in a closed enclosure or FreeAir installation, to achieve a balanced sound image.

How does the FF2.5 differ when used in a bass reflex enclosure?

The use of the FF2.5 in a bass reflex enclosure with a volume of 1.5L and an 80cm² port at 13 cm length significantly changes the bass reproduction. In this configuration, the efficiency in the low-frequency range is noticeably increased, as the air standing in the opening is opposed by an acoustic resistance, which lowers the system's resonance frequency. This acoustic optimization enhances the efficiency of the bass and allows for a full, dynamic sound. This is particularly advantageous when you listen to bass-intensive music or when the speaker is used in larger rooms where bass reproduction plays a crucial role. Meanwhile, the remaining sound characteristics of the FF2.5 are largely preserved.

What role does the neodymium magnet play in the FF2.5?

The neodymium magnet in the FF2.5 speaker is small but powerful. With its copper cap on the pole core, it creates a strong magnetic field that precisely controls the diaphragm movement. Due to its compact design, it allows for greater freedom of movement at the speaker edge, which reduces distortion and ensures fine sound resolution. The higher magnetic flux of neodymium compared to conventional ferrite magnets provides more efficient performance of the speaker while being smaller in size. In combination with the aluminum voice coil, the magnet supports precise and dynamic audio playback, even under demanding conditions. This combination improves impulse fidelity and ensures consistent sound pressure.

How does the FF2.5 perform at high power levels?

The FF2.5 is designed for an RMS power of 60W with a high-pass filter starting at 250Hz/12dB/octave. This specification ensures robust and consistent playback even at higher levels. The combination of the stable fiberglass diaphragm and the lightweight aluminum voice coil ensures uniform vibration, producing no distorted or unclear tones even at high volumes. A damped pole core bore supports this behavior by minimizing resonances and maintaining acoustic control. The linear excursion of 1.5mm in both directions allows for high acoustic output without the risk of mechanical limitations that could affect overload protection.

Manufacturer information / responsible person

fortissimo
Dietmar Carle
Bahnhofstr. 23
88048 Friedrichshafen Kluftern
Germany

Contact: didi@fortissimo.de

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