The JRT 9/15 captures the legendary tones of classic low watt American and British amplifiers, enhanced by dual-voiced preamp circuits, each powered by a 5879 pentode. With the ability to switch between 6V6 and EL84 power tubes, it offers a versatile blend of both iconic sounds and unique hybrid textures, all easily accessible through its intuitive controls. The JRT 9/15 preamp drives two 5879 pentodes in tandem, each with its own independent volume control. These circuits are voiced for dramatically different responses: one provides more top-end presence and later breakup, while the other offers lower headroom with an emphasis on low-mid frequencies, delivering a dense, rich tone. These complementary channels can be used individually or simultaneously to achieve the ideal response, highlighting the best qualities of each. A 6-position tone control ensures just the right amount of body and texture, while the cut control reduces harsh upper frequencies as needed, retaining strong presence and definition. A key feature of the JRT 9/15 is its ability to switch between 9 watts, utilizing a pair of 6V6 tubes in Class A to deliver the warm, rich tones of vintage 1950s American amps, and 15 watts with a pair of EL84 tubes in Class AB for a bright, chimey top-end and complex, musical breakup, reminiscent of 1960s British designs. The tonal and response characteristics, along with the volume flexibility of these two output options, make the JRT 9/15 versatile enough for a wide range of performance and recording environments.
