Improved 500 Series tube preamp RSE PA504

Do you like the analog VU meters, as we do? We decided to extend our 500 series with the preamp, based on our PA501 preamp. Just added the more informative VU and a bit changed switchers functions. Now you have a Polarity/PAD switcher. A usually, clear sound filled with harmonics and soul. The amplifier has an instrument input (HI Z) and HPF.

This device is extremely similar to PA501. Basic in function, anything but basic in sound! This preamp is able to outperform many similar devices on the market. In addition to delivering crystal clear sound and high gain, the PA504 can bring music to life. This is a complete tube preamplifier with input and output transformers. The ability to select the type of input signal allows you to work not only with microphones of different sensitivities but also connect a line signal to the input using the padding function. The 500 series standard imposes restrictions on the modules, it concerns the supply voltage, the size of the device and the front panel, etc. In contrast to the solution of many competitors for powering tubes with low anode voltage, we provided the stages with optimal powering. This made it possible to unleash the potential of the device and obtain a dense, clear sound.