1. Introducció
Thank you for choosing the Monacor DT-140 Hi-Fi Dome Tweeter. This manual provides essential information for the proper installation, operation, and maintenance of your new tweeter. Please read this manual thoroughly before use to ensure optimal performance and longevity of the product.
The Monacor DT-140 is a high-fidelity dome tweeter designed to deliver clear and precise high-frequency sound reproduction. It features an 80 Wmax / 40 Wrms power handling, a 25 mm (1") silk dome, and a neodymium magnetic system with a heatsink for efficient cooling and very low stray magnetic fields. Its waveguide design ensures constant bundling behavior, making it ideal for combination with 5 to 6.5-inch woofers.
2. Instruccions de seguretat
Observeu sempre les següents precaucions de seguretat per evitar danys al producte o lesions personals.
- Maneig de potència: Do not exceed the maximum power handling capacity of 80 Wmax or 40 Wrms to prevent damage to the voice coil.
- Coincidència d'impedància: Assegureu-vos el amplifier's output impedance matches the tweeter's 4 Ω impedance. Mismatched impedances can lead to amplifier or speaker damage.
- Polaritat: Always connect the tweeter with correct polarity (+ to + and - to -) to ensure proper phase and sound quality.
- Instal·lació: Ensure the tweeter is securely mounted to prevent vibration or detachment during operation.
- Medi ambient: Avoid exposing the tweeter to extreme temperatures, high humidity, or direct sunlight. While the product is indicated as "waterproof" in some specifications, this typically refers to resistance to splashes, not submersion.
- Manipulació: Handle the silk dome with care. Do not touch or press the dome, as this can cause irreversible damage.
- Ventilació: Ensure adequate ventilation around the heatsink to prevent overheating, especially during prolonged high-power operation.
3. Producte acabatview
The Monacor DT-140 tweeter is designed for easy integration into various audio systems. Below are the key components and their descriptions.

Figura 3.1: Davant view of the Monacor DT-140 Hi-Fi Dome Tweeter. This image shows the black, oval-shaped tweeter with its central silk dome and mounting holes.
- Silk Dome: The 25 mm (1") silk dome is responsible for producing clear and detailed high frequencies.
- Guia d'ones: The integrated waveguide ensures a constant bundling behavior, optimizing sound dispersion when paired with woofers.
- Neodymium Magnetic System: A powerful and compact magnet system that contributes to the tweeter's efficiency and low stray magnetic fields.
- Dissipador de calor: Located at the rear of the magnetic system, it dissipates heat generated during operation, ensuring stable performance.
- Brida de muntatge: The outer rim with pre-drilled holes for secure flush mounting.
- Terminals: Connection points for speaker wires, typically marked for positive (+) and negative (-) polarity.
4. Configuració i instal·lació
Proper installation is crucial for the performance and longevity of your Monacor DT-140 tweeter.
4.1. Eines i materials necessaris
- Drill with appropriate hole saw (⌀ 72 mm for installation opening)
- Tornavís
- Speaker wire (appropriate gauge for your system)
- Pelacables
- Crimping tool (if using spade connectors)
- Mounting screws (not included, typically 3x ⌀ 4mm)
4.2. Passos d'instal·lació
- Trieu la ubicació de muntatge: Select a suitable location for flush mounting the tweeter. Consider optimal sound dispersion and integration with existing woofers.
- Preparació del forat de muntatge: Using a ⌀ 72 mm hole saw, carefully cut the installation opening. The overall diameter of the tweeter is ⌀ 103 mm, and the installation depth is 30 mm.
- Preparació del cable: Strip approximately 10-15 mm of insulation from the ends of your speaker wires.
- Connecteu els cables: Connect the speaker wires to the tweeter terminals. Ensure correct polarity: connect the positive (+) wire from your amplifier/crossover to the positive terminal on the tweeter, and the negative (-) wire to the negative terminal. Incorrect polarity will result in poor sound quality and phase issues.
- Insert Tweeter: Carefully insert the tweeter into the prepared mounting hole.
- Muntatge segur: Use appropriate screws (e.g., 3x ⌀ 4mm) to secure the tweeter to the mounting surface through the pre-drilled holes on the flange. Do not overtighten the screws.
- Connexió del sistema: Connect the other end of the speaker wires to your audio system's amplifier or passive crossover network, ensuring correct polarity.

Figura 4.1: Technical drawing showing the dimensions of the Monacor DT-140 tweeter. Key dimensions include an overall diameter of ⌀ 103 mm, an installation opening of ⌀ 72 mm, and an installation depth of 30 mm. The mounting holes are ⌀ 4 mm (3x).
5. Instruccions de funcionament
Once installed, the Monacor DT-140 tweeter operates as part of your audio system.
- Xarxa creuada: The DT-140 is designed to be used with a passive or active crossover network. The recommended crossover frequency (12 dB/octave) is 2500 Hz. Using the tweeter without a proper crossover will likely result in damage due to low-frequency signals.
- Control de volum: Adjust the volume of your audio system gradually. Avoid sudden high volume bursts, especially during initial use.
- Qualitat del so: The tweeter is designed to reproduce frequencies from approximately 1200 Hz up to 20000 Hz. If the sound is distorted or unclear, check your connections and crossover settings.

Figura 5.1: Frequency response and impedance curve for the Monacor DT-140 tweeter. The graph shows the tweeter's sound pressure level (dB) across the frequency spectrum (Hz) and its impedance (Ω). The response indicates effective operation from approximately 1.2 kHz to 20 kHz.
6. Manteniment
The Monacor DT-140 tweeter requires minimal maintenance.
- Neteja: Use a soft, dry cloth to gently wipe the exterior of the tweeter. Do not use abrasive cleaners, solvents, or excessive moisture. Avoid touching the silk dome directly.
- Inspecció: Periodically check the mounting screws for tightness and the speaker wires for any signs of wear or damage.
- Medi ambient: Ensure the tweeter remains in a clean, dry environment, free from dust and debris.
7. Solució De Problemes
If you experience issues with your Monacor DT-140 tweeter, refer to the following common problems and solutions.
| Problema | Causa possible | Solució |
|---|---|---|
| No hi ha so del tweeter |
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| So distorsionat o aspre |
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| Weak or muffled sound |
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If the problem persists after trying these solutions, please contact Monacor customer support or a qualified audio technician.
8. Especificacions
Technical specifications for the Monacor DT-140 Hi-Fi Dome Tweeter.
| Model | DT-140 (10.5670) |
| Tipus | Hi-Fi Dome Tweeter |
| Impedance (Z) | 4 Ω |
| Resonance Frequency (fs) | 1200 Hz |
| Max. Frequency Range | FX-20000 Hz |
| Crossover Frequency (12 dB) | 2500 Hz |
| Maximum Power Capacity (Wmax) | 80 W |
| Nominal Power Capacity (Wrms) | 40 W |
| Mean Sound Pressure (1 W/m) | 90 dB |
| Diàmetre de la bobina de veu | 25 mm |
| Diàmetre de l'imant | 30 mm |
| Installation Opening (⌀) | 72 mm |
| Profunditat d'instal·lació | 30 mm |
| Dimensions (⌀) | 103 mm |
| Pes | 94 g |
| Material | Plàstic o alumini |
| Color | Negre |
| Característica especial | Neodymium magnet system with heatsink |
9. Garantia i Suport
Monacor products are manufactured to high quality standards.
9.1. Informació de la garantia
This product comes with a limited warranty. Please refer to the warranty card included with your purchase or visit the official Monacor website for detailed warranty terms and conditions. The warranty typically covers manufacturing defects under normal use. Damage resulting from improper installation, misuse, or exceeding specified power limits is generally not covered.
9.2. Atenció al client
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact Monacor customer support.
- Weblloc: Visit the official Monacor weblloc web amb preguntes freqüents, informació sobre productes i dades de contacte.
- Contacte: Refer to the contact section on the Monacor website for phone numbers or email addresses for your region.
- When contacting support, please have your product model (DT-140) and serial number (if applicable) ready.





