Thursday, May 5, 2011

LaChapell Audio Model 583e - 500 series Tube Preamp with 3 Band EQ section



The Model 583e from LaChapell Audio is a transformer isolated tube preamp with a 3 band equalizer that can be used jointly or independently. The amplifier stage is the same as the 583S (which is the first 500 series tube pre) including the Jensen JT-115k input transformer coupled with an ultra-clean transformer-less three-band EQ section with fully sweeping frequency controls and cut/boost settings of +/- 8dB.


583e Features




  • Ultra-clear and phase-coherent transformerless 3-band EQ 



  • 12AX7 tube preamplifier with Jensen JT-115k transformer-based input stage



  • EQ input resistance: 40 Kohms



  • EQ output resistance: 50 Kohms



  • EQ bands: Low: 30Hz-400Hz; Mid: 325Hz-5kHz; High: 2.5kHz-20kHz



  • EQ cut/boost: +/-8dB



  • EQ max input: +24dBu



  • EQ max output: +26dBu



  • EQ self-noise: -93dB



  • EQ THD+N: 0.012% (with +8dBu input signal)



  • Preamp gain range 0dB-70dB



  • Preamp THD+N (gain @50dB, 0dBu output): < 0.25



  • Preamp frequency response (-3dB, output favored): 12Hz-70kHz



  • Preamp input impedance (mic) 1.5 Kohms, (hi-Z) 40 Kohms



  • Preamp tube: 1 x 12AX7



  • Total weight: 3.5 lbs.




  • $1690 at Sweetwater Sound

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