beyerdynamic DT 990 PRO X Headphones Get Detachable Cable and New Drivers

Designed for critical listening and editing, the updated 2025 beyerdynamic DT 990 PRO X headphones bring new flexibility, comfort, and clarity to one of the most iconic headphones in professional audio. The DT 990 PRO X now have a detachable cable and received powerful new STELLAR.45 drivers, getting a lower impedance rating that allows for better performance across a wide range of devices (the original 600 ohm version of the DT 990 PRO is still around and remains unchanged).

beyerdynamic announced the new closed-back DT 1770 PRO MKII and open-back DT 1990 PRO MKII headphones. The second generation of the company's studio reference headphones feature enhanced comfort, improved sound quality, plus a newly developed dynamic TESLA.45 driver. According to the German company, these refreshed flagship models have lower impedance to offer added flexibility for today's music professionals.

AudioControl has announced the introduction of three highly versatile CM Series amplifiers using GaN technology and a new proprietary circuit design for compatibility with both 70-volt and 4/8-Ohm loudspeakers (Dual Mode). These new CM Series amplifiers offer DSP control, matrixing capabilities, Dante digital audio networking and all the critical features integrators must have to satisfy every imaginable application including superior audio performance and build quality.

Celestion introduced the FTR12-4080DL 12-inch, low frequency 4-ohm driver which is specifically designed for subwoofer applications, offering a compact and powerful alternative with a cast aluminum chassis and ferrite magnet. Well-established as an 8-ohm driver, this purpose-built subwoofer is now available in 4-ohm, making it ideal for applications that are hungry for every watt of amplifier power when delivering uncompromising bass.

In this article, Jack Elliano the founder and principal designer behind Electra-Print Audio, details a simple but very interesting concept of a line amplifier using step-up transformers plus a variable gain control, offering usable results from low impedance sources. The preamplifier project uses Electra-Print handcrafted transformers, which the company manufactures for its own high-fidelity tube audio components, directly from its home base in Las Vegas, NV. This article was originally published in audioXpress, January 2005.