Peavey RTD 215 Stereo Graphic Equalizer is a piece of audio equipment that can be used to improve the sound quality of your audio system. It has two channels, each with 15 bands of equalization, allowing you to adjust the levels of specific frequencies in your audio signal. This can be useful for correcting problems with the acoustics of your room, or for fine-tuning the sound of your music or other audio sources.

The RTD 215 also has a number of other features that make it a versatile tool for audio professionals. These include:

• Switchable +6 and +12 dB ranges, which allow you to boost or cut the level of a specific frequency by up to 12 dB.