With recent engineering breakthroughs at Audio Research, however -- especially stemming from the development of the VTM200 input stage technology -- it became increasingly clear that the venerable …

Equipped with an auto-mute circuit for approximately 40 seconds when power is turned on. The balanced and unbalanced inputs can be selected at any time by operating the toggle switch. A …

Dec 8, 2000 · I have been thinking of buying an LS25 and than eventually upgrading it to the mkII version. Can anyone give me some feedback on newew AR pre amps.

Oct 19, 2025 · Used Audio Research LS25 Control amplifiers for sale on 400+ second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability.

The LS25 vacuum tube stereo line preamplifier offers sonic performance, functional flexibility and value second only to the world-renowned Reference One preamplifier.

The information in the LS25 Owner's Manual applies to the LS25MKll, but with the following changes for the MKII version: The LS25MKll uses two 61-130 tubes instead of the four 6922 tubes in the original …

What else to know about the Audio Research LS25? The LS25 vacuum tube stereo line preamplifier offers sonic performance, functional flexibility and value second only to the world-renowned …

It has great precision when tracking any complex audio signal, is even more powerful and dynamic than the LS16, and most importantly, is very enjoyable over the long haul.

This Audio Research LS25 MKII Linestage Preamplifier is in great condition showing minor wear form use and handling. This preamp features XLR capabilities for each input and output and a very crisp …