MUNDORF AMT60W1.1 — AMT-Tweeter mit Frontplatte
93 dB Sensitivity (2.83 V/1 m) · 4 Ω
Technical data
- Impedance: 4 Ω
- Sensitivity: 93 dB (2.83 V/1 m)
- Application: ab 2200 Hz (12 dB/Okt.) bis 34 kHz
- Dimensions: Ø94xZ48 mm
- Magnet: Neodymium
Datasheet (PDF) · Manufacturer page
Series: AMT U · Part no.: 42A-CHS-AT-MUN-0004
Mundorf AMTU60W1.1-C: AMT tweeter with round 94 mm faceplate, 93 dB, from 2,200 Hz
An AMT tweeter that mounts like a dome: the Mundorf AMTU60W1.1-C sits on a round faceplate of 94 mm diameter, so all you need is a round cut-out and no adapter of any kind. Mounting depth is 48 mm. The element belongs to Mundorf's AMT U series, uses a neodymium magnet and is rated at 93 dB (2.83 V/1 m) into 4 Ω.
The strength of an air motion transformer lies in how it moves air. The pleated foil pushes air out of the folds at a higher velocity than the foil itself vibrates. That allows the moving mass to stay tiny, which shows up as fast settling and a bandwidth up to 34,000 Hz. At the bottom end the AMTU60W1.1-C can be used from 2,200 Hz, which makes it interesting for 2-way designs with larger mid-woofers where a small AMT would have to be crossed too high.
Use and enclosure
For the crossover: 2,200 Hz is the floor with 12 dB per octave, not the target. When in doubt, cross well above it or raise the slope to 18 or 24 dB per octave, so the AMT keeps its distortion headroom through the transition. The 4 Ω call for a filter calculated accordingly, and the high 93 dB sensitivity will have to be padded down with a voltage divider against most hi-fi mid-woofers. In active designs with DSP both issues disappear, since you set crossover, slope and level directly.
Dispersion is typical AMT: wide horizontally, narrower vertically, because the foil stands upright. The round faceplate provides a small, smooth surround for the foil and makes flush mounting into the baffle easy, which reduces edge reflections in the upper range.
What to look out for
- Round faceplate 94 mm diameter, 48 mm mounting depth: installs like a dome tweeter.
- 4 Ω impedance: calculate crossover parts for it, amplifier must handle 4 Ω.
- 93 dB sensitivity: level usually needs matching to the mid-woofer.
- Usable from 2,200 Hz with at least 12 dB per octave, better higher or steeper.
- Neodymium magnet: light motor, little space needed behind the baffle.
Frequently asked questions
Does the AMTU60W1.1-C fit an existing cabinet with a round tweeter cut-out?
If the cut-out matches the 94 mm faceplate and the 48 mm mounting depth fits the cabinet, yes. The exact dimensions for cut-out and screw holes are in the PDF datasheet at 42.audio. After that you only need to adapt the crossover to 4 Ω and the higher level.
Which crossover frequency and filter order make sense?
At least 2,200 Hz at 12 dB per octave, that is the specification. For high levels or a mid-woofer that no longer behaves above that point, a crossover well above the floor with 18 or 24 dB per octave is the better plan.
What is the difference between the -C version and the element without faceplate?
Electrically and acoustically it is the same AMT system with 93 dB, 4 Ω and the 2,200 Hz to 34,000 Hz range. The -C version adds the round 94 mm plate and saves you routing work and adapters; without the plate you have more freedom in the front design.
Mundorf AMTU60W1.1-C: manufacturer, spellings and classification
Mundorf is Mundorf EB GmbH of Cologne, Germany, known for crossover components and the air motion transformer tweeters of the AMTU series. The AMTU60W1.1-C is an air motion transformer (AMT) tweeter from the AMT U series, available from 42.audio, Mundorf dealer in Germany, with datasheet and full specifications in the driver database.
At 42.audio you get the MUNDORF AMTU60W1.1-C with datasheet PDF, all key data in the driver database. More drivers from this manufacturer: Atlas Mundorf.
Specifications
| Manufacturer | MUNDORF |
| Category | AMT Tweeter |
| Series | AMT U |
| Magnet | Neodymium |
| Impedance (Ω) | 4 |
| Sensitivity (dB) | 93 |
| Frequency from (Hz) | 2200 |
| Frequency to (Hz) | 34000 |