MUNDORF AMTU110W1.1 — AMT-Tweeter mit Frontplatte
93 dB Sensitivity (2.83 V/1 m) · 6 Ω
Technical data
- Impedance: 6 Ω
- Sensitivity: 93 dB (2.83 V/1 m)
- Application: ab 1800 Hz (12 dB/Okt.) bis 27 kHz
- Dimensions: L61xH131xZ48 mm
- Magnet: Neodymium
Datasheet (PDF) · Manufacturer page
Series: AMT U · Part no.: 42A-CHS-AT-MUN-0008
Mundorf AMTU110W1.1-R: AMT tweeter with faceplate, 6 Ω and 93 dB from 1,800 Hz
At Mundorf the R in the name stands for the version with a faceplate: the AMTU110W1.1-R is the U-series AMT tweeter ready to drop into a baffle cut-out. Acoustically everything stays as on the base model: 6 Ω, 93 dB sensitivity at 2.83 V and 1 m, working range from 1,800 Hz with 12 dB/oct. up to 27 kHz, and a neodymium motor. With the faceplate the driver measures 61 x 131 x 48 mm.
The faceplate does three things: it carries the fixings, it covers the cut-out cleanly and it defines the edge where the baffle begins. For DIY builds that means: rout the cut-out, drop in the driver, screw it down, done. The air-motion transformer behind it works with a pleated foil whose folds contract and open in the magnetic field, expelling air at high velocity. The result is the typical AMT combination of low moving mass, large radiating area and clean transient behaviour.
Use and enclosure
The AMTU110W1.1-R is at home as the tweeter in two-way boxes with mid-woofers that still behave well at 1,800 Hz, or in three-way systems above a midrange. Stick to the manufacturer's minimum requirement of 1,800 Hz at 12 dB/oct.; a 24 dB/oct. high-pass adds safety and reduces distortion at the lower limit. Crossing higher is always allowed and often the better choice with smaller mid-woofers.
The faceplate can be recessed flush into the baffle, which minimises edge reflections and keeps dispersion clean in the crossover region. Mount the AMT upright, as the tall diaphragm narrows vertical dispersion. Calculate the passive crossover with 6 Ω; 2.83 V into 6 Ω is a little more than 1 W, so the sensitivity matches hi-fi mid-woofers well without a large voltage divider. The datasheet PDF, driver database and enclosure calculator are available at 42.audio.
What to look out for
- Faceplate 61 x 131 x 48 mm: direct mounting, flush or surface.
- 6 Ω impedance: design the crossover accordingly, choose a 4 Ω stable amplifier.
- 93 dB at 2.83 V/1 m: matches typical hi-fi mid-woofers.
- Crossover from 1,800 Hz with at least 12 dB/oct.
- Neodymium magnet, compact motor assembly.
Frequently asked questions
Does the AMTU110W1.1-R sound different from the version without faceplate?
The driver is identical; sensitivity, impedance and working range are the same. The faceplate at most influences behaviour at the edge to the baffle, which is negligible when flush mounted. The difference lies in mounting effort.
How do I install the AMTU110W1.1-R?
Rout a cut-out in the baffle, add a recess for the 61 x 131 mm faceplate if you want it flush, then screw it down. Mount it upright and put the listening axis at ear height.
Which mid-woofer goes with it?
A driver with similar sensitivity around 93 dB that plays beyond 1,800 Hz without break-up. The driver database and the enclosure calculator at 42.audio help with selection and cabinet design.
Mundorf AMTU110W1.1-R: 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 AMTU110W1.1-R 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 AMTU110W1.1-R 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) | 6 |
| Sensitivity (dB) | 93 |
| Frequency from (Hz) | 1800 |
| Frequency to (Hz) | 27000 |