BEYMA CD-171Fe/PT
BEYMA CD-171Fe/PT — 1" / 1 inch · Compression Driver · Tweeter / HF Driver · Ferrite Magnet
80 W AES - 800 – 20000 Hz - 8 Ω
Part no.: 42A-CHS-KD-BEY-0030
Documents
BEYMA CD-171Fe/PT — 1" · Compression Driver · Ferrite-Magnet
80 W AES · Frequency range 800 Hz – 20000 Hz
Technical data
- Diameter: 1 "
- Voice coil: 1.75 "
- Power handling: 80 W AES
- Impedance: 8 Ω
- Magnet: Ferrite
- Weight: 2.3 kg
- Mounting depth: 59 mm
- Frequency range: 800 – 20000 Hz
Series: CD · Part no.: 42A-CHS-KD-BEY-0030
Beyma CD-171Fe/PT: 1" driver with ferrite motor, 80 W AES and a working range from 800 Hz
The Beyma CD-171Fe/PT is the PT diaphragm version of the CD-171Fe, a 1" compression driver from the CD series. Beneath the diaphragm sits a 1.75" voice coil in a ferrite magnet system with a BL of 5.4 Tm; power handling is 80 W AES at 8 Ω. The specified frequency range runs from 800 Hz to 20,000 Hz, from the upper midrange to the limit of hearing.
What places it within the 1" class is the combination of a large coil and a small exit: the 1.75" voice coil brings thermal reserves and the ability to work low, while the 1" throat keeps high-frequency radiation clean and allows compact horns. At 2.3 kg and 59 mm mounting depth the driver is solid without being bulky. At 42.audio you will find it alongside its PK twin and the rest of the CD series in the driver database.
Use and enclosure
The CD-171Fe/PT is most at home as the HF section of a two-way design, taking over from the upper midrange. Place the crossover well above the 800 Hz lower limit and use a steep high-pass; with active drive, a 24 dB/oct filter is the norm. A small waveguide in a studio monitor demands a higher crossover than a deeply loaded PA horn, because the waveguide provides little loading at the bottom and the diaphragm then moves freely.
On horn choice: anything with a 1" interface is mechanically a candidate. Beyma has suitable models in its horns and waveguides category; looking beyond the brand, the 18SOUND XR1064 Alu suits narrow coverage and the XT120 wide coverage, as do the Celestion 1" horns such as the H1SC-9040. Make sure the bolts and flange gasket seat properly to avoid hissing at the joint.
What to look out for
- Ferrite magnet and 2.3 kg: mechanically robust, but heavier than a neodymium driver of the same size.
- 8 Ω impedance: uncritical for any amplifier and easy to design around in passive crossovers.
- BL 5.4 Tm with a 1.75" voice coil: a strong motor for a 1" driver.
- Mounting depth 59 mm: factor it in for shallow cabinets and rear-wall clearance.
- PT diaphragm variant: electrically identical to the PK version, choose by tonal preference.
Frequently asked questions
Can I use the CD-171Fe/PT in a small studio monitor?
Yes, provided you mount it on a suitable 1" waveguide and set the crossover high enough. A compact waveguide gives the diaphragm little loading at the bottom, so do not cross near the 800 Hz limit. With DSP control and a steep high-pass it works well.
What is the difference between PT and PK on the CD-171Fe?
Motor, voice coil, power handling and dimensions are identical; only the diaphragm variant differs. That affects the tonal character in the treble, not the 80 W AES rating or the frequency range. A listening comparison is the best way to decide which version you prefer.
How much power does the CD-171Fe/PT need?
Not much. 80 W AES is a continuous rating with a noise signal; with music the average power in the HF branch is far below that. An amplifier that behaves cleanly into 8 Ω plus a limiter or a conservatively set level protects the driver better than raw headroom.
Beyma CD-171Fe/PT: manufacturer, spellings and classification
Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The CD-171Fe/PT is a 1-inch compression driver with ferrite magnet from the CD series, available from 42.audio, Beyma dealer in Germany, with datasheet and full specifications in the driver database.
At 42.audio you get the BEYMA CD-171Fe/PT with all key data in the driver database. More drivers from this manufacturer: Atlas Beyma.
Thiele-Small parameters
| Nominal impedance | 8 Ω |
|---|---|
| Resonance frequency fs | 800 Hz |
| Force factor BL | 5.4 Tm |
Specifications
| Allgemein | |
|---|---|
| Manufacturer | BEYMA |
| Category | Compression Driver |
| Series | CD |
| Magnet | Ferrite |
| Impedance (Ω) | 8 |
| Power handling (W) | 80 |
| Frequency from (Hz) | 800 |
| Frequency to (Hz) | 20000 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 1 |
| Voice coil (inch) | 1.75 |
| Mounting depth (mm) | 59 |
| Weight (kg) | 2.3 |
| Thiele-Small-Parameter | |
|---|---|
| Fs (Hz) | 800 |
| BL (Tm) | 5.4 |