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D-T25a

D-T25a

Technical Highlights

  • Power: 25 W RMS/125 W Peak, Impedance: 4 Ohm, 93.6 dB SPL.
  • Frequency range: 1,500–20,000 Hz, Dome size: 25 mm.
  • Neodymium magnet, underhung copper-aluminum voice coil.
  • More technical details
€69.00
€69.00 €69.00
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ProductD-T25a

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1 year extra warranty

Every product purchased from Masori includes an additional year of warranty in the third year after purchase (months 25–36). We cover repair or replacement free of charge for covered warranty claims. Automatic and free – exclusively for Masori customers. Your statutory rights remain unaffected.

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DD Audio-D-T25a-Kalotten-Hochtöner-masori-kaufen
€69.00
€69.00 €69.00

The DD Audio D-T25a is a 25 mm dome tweeter that impresses with its detailed and balanced high-frequency reproduction. Equipped with a textile dome and a powerful neodymium motor, it offers a high sensitivity of 93.6 dB SPL. The underhung voice coil made of copper-aluminum ensures efficient cooling and is free from ferrofluid, which increases the longevity of the tweeter. With the included mounting and installation housings, flexible installation is possible. Suitable for hi-fi and car hi-fi systems, the D-T25a fits into almost any vehicle with its compact design. Its frequency range extends from 1,500 to 20,000 Hz, allowing for impressive sound diversity.

Features

  • 25 mm textile dome for smooth high-frequency reproduction
  • Powerful neodymium drive
  • Underhung voice coil made of copper-aluminum
  • Flexible mounting accessories including mounting and installation rings
  • High sensitivity of 93.6 dB SPL

Technical Data

  • Dome size: 25 mm
  • Power handling: 25 W RMS / 125 W Peak
  • Impedance: 4 Ohm
  • Frequency range: 1,500 – 20,000 Hz
  • Sensitivity: 93.6 dB SPL
  • Mounting diameter: 41 mm
  • Mounting depth: 18 mm
  • Material: Textile dome, neodymium magnet

Frequently Asked Questions about D-T25a

What distinguishes the DD Audio D-T25a Tweeter in terms of frequency range and sensitivity, and why is the wide coverage from 1,500 to 20,000 Hz so relevant for car audio systems?

This 25 mm dome tweeter covers a frequency range of 1,500 to 20,000 Hz, which is ideal in the car audio sector when you need clarity in high tones. Especially if you enjoy listening to music loudly, fine details can be reproduced cleanly because the textile dome allows for a warm characteristic while also having precise impulse fidelity. With a sensitivity of 93.6 dB SPL, it shows its potential even at low amplifier power. Additionally, the underhung copper-aluminum voice coil provides efficient cooling by avoiding ferrofluid. This keeps the system thermally robust, which is noticeable in low-distortion highs. The neodymium motor enhances the response, ensuring that the highs remain sharply defined in the car.

Why does the DD Audio D-T25a feature a textile diaphragm instead of a metal dome, and how does this affect the sound in HiFi systems?

The choice of a textile diaphragm allows for a particularly natural reproduction of highs because this material transmits fine vibrations without harsh resonances. A metal dome, on the other hand, can lead to tonal hardness at certain frequencies, which can be disturbing, especially in combination with sensitive midrange drivers. In this tweeter, the neodymium magnet also contributes to a uniform motor structure that acts with strong impulses and detail. Thanks to the smooth fabric, distortion remains low even at high levels. The wide bandwidth between 1,500 and 20,000 Hz benefits from this, as sensitive areas in the transition to midrange are resolved more precisely. Overall, a sonically coherent combination is created that connects transparent fine detail with gentle high-frequency reproduction.

What role does the underhung copper-aluminum voice coil play in the DD Audio D-T25a, and why is its ferrofluid-free construction so significant?

Speaker coils can often be stabilized through ferrofluid cooling, but the copper-aluminum design used here relies on a mechanically refined construction without this fluid. This reduces the risk of altered damping properties and thus provides an unadulterated sound transmission. The suspended voice coil does not extend beyond the center of the magnetic gap, which improves precision in the upper frequency range. Additionally, the coil can move better without generating unnecessary heat, resulting in consistent impulse reproduction. The copper-aluminum mixture achieves efficient heat dissipation, ensuring that sensitivity is not affected by thermal influences. The absence of ferrofluid also results in less maintenance and longer stability of the acoustic properties.

How does the DD Audio D-T25a benefit from its powerful neodymium motor, and why is weight so crucial compared to ferrite magnets?

Neodymium magnets have a higher energy density than ferrite variants, giving the tweeter more power in a more compact format. This allows you to achieve a convincing presence in the high-frequency range even in tight installation conditions. At the same time, the weight remains significantly reduced, making installation easier and minimally affecting the center of gravity. Compact dimensions are particularly essential for automotive applications, as available space is limited. The quick response of the drive enables accurate reproduction of impulsive signals, leading to precise high-frequency resolution. As a result, you experience excellent clarity in the frequency range above 1,500 Hz. Additionally, the neodymium motor is advantageously tuned to the suspended voice coil, synergistically enhancing the sound.

What distinguishes the DD Audio D-T25a in terms of the included mounting options, and how flexible are the installation and mounting housings?

With the included mounting and installation rings, you have various installation options without needing to make major modifications. You can either integrate the tweeter discreetly into an existing cutout or mount it with the installation housing on the dashboard or door mirror trim. This allows you to optimize its acoustic orientation, for example, when you need the radiation angle for precise stage representation. The compactness with a mounting diameter of 41 mm and a mounting depth of 18 mm is particularly beneficial in tight spaces, while the neodymium technology ensures high sensitivity. Even in complex dashboards, the rings can be mounted in such a way that sound pressure is directed precisely, allowing the highs to unfold excellently.

How can the load capacity of 25 W RMS and 125 W Peak be optimally utilized without damaging the Tweeter?

The DD Audio D-T25a allows you to use the power over a wide range without the textile dome producing unwanted distortions. If you start with moderate amplifier power, you already benefit from clear highs, as the sensitivity is very high at 93.6 dB SPL. However, if you want to go louder, you should ensure that the RMS value of 25 W is not exceeded continuously. Short-term peaks up to 125 W Peak are possible as long as the Tweeter is briefly loaded and then unloaded. Therefore, an active Crossover is usually recommended to ensure that the frequency range consistently remains above 1,500 Hz and no energy-rich bass components stress the dome.

Which Crossover is recommended to drive the Tweeter cleanly above 1,500 Hz, and how does this affect the Midrange speakers transition?

For the DD Audio D-T25a, it is advisable to choose a steep crossover frequency around 2,000 Hz or slightly below, so that the high-frequency dome only has to cover the upper frequency range. This avoids unnecessary low-frequency input that could stress the motor. A Crossover with 12 or 18 dB/octave slope has proven effective in practice and provides better protection for the Tweeter. At the transition to the Midrange speakers, seamless integration occurs because the extremely lightweight drive allows for precise impulse processing. This results in a clear sound image across the entire frequency spectrum, with tones beyond the 1,500 Hz limit being reproduced brilliantly.

How do a mounting diameter of 41 mm and a mounting depth of 18 mm affect installation, and what aspects should be considered when installing in compact door panels?

The DD Audio D-T25a can be accommodated almost anywhere due to its small space requirement, making it particularly interesting for vehicles with tight mounting spaces. You can adjust the drilling precisely without having to create large cutouts. In tight door panels, a diameter of 41 mm and a depth of 18 mm are advantageous because they take up little space and allow for stable fixation. Ensure that there is sufficient air circulation behind the Tweeter and that no cables or damping materials obstruct the magnet block. With proper placement, only minimal vibration influences occur, so your high-frequency reproduction remains unaltered. This achieves a disturbance-free high-frequency representation without relying on covers or complicated adapters.

How does the copper-aluminum voice coil, together with the textile dome, ensure improved heat dissipation, and why does this affect the level stability at high volumes?

In the DD Audio D-T25a, the suspended copper-aluminum coil works with a highly conductive material mix that efficiently dissipates the heat generated from the core. This effect is supported by the absence of ferrofluid damping, as no liquid hinders the dynamic flow of the coil or causes unwanted damping. The textile dome also provides high thermal stability at intense levels and can partially radiate the generated heat to the environment. Combined, this design allows for consistent performance utilization without the tweeter quickly overheating at high volumes. This way, you can experience loud passages in detail without sudden drops in power or distortions that would impair your listening enjoyment.

What should be considered when using this tweeter in HiFi systems to achieve the widest possible soundstage, and how can different installation positions be compared?

The DD Audio D-T25a is excellent for a wide stereo soundstage once it is correctly aligned. You can place it angled on the dashboard or integrate it into enclosures to minimize reflections. Thanks to its high sensitivity, it already works well with relatively small amplifier powers, giving you more flexibility in choosing your equipment. To find the optimal radiation angle, it is worthwhile to test various installation positions and observe the sound propagation. A minimal shift can noticeably expand the spatiality, especially in combination with a well-tuned transition to the rest of the system. This way, you achieve a natural height layering.

Manufacturer information/responsible person

Audio Import Group
Pekka Kinnunen
Palkkitie 10
84100 Ylivieska
Finland

Contact: info@audioimport.fi

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