JD 9 II Phono Preamp

JD 9 II Phono Preamp

If vinyl is a source of enjoyment, then the JD9II is a versatile and easy to use tube unit that is sure to enhance your sound.  Based on an earlier circuit we have improved the unit with a larger power supply, the addition a a robust voltage regulator, upgrade output capacitors and changes to the resistor arrays. With dim adjustments and two levels of output, you can easily configure the unit into your system, and then the fun begins.

Frequency Response:          5Hz to 110KHz, (+/- 1 dB)

SNR:                                       > 100 dB

Distortion THD:                    Less than .01%

Input Impedance:                  100Kohms

Output Impedance:               600 ohms

Phono Stage:

            MM:                            60 dB, 5 mV 

            MC High:                    75 dB, 0.5 mV – 1.5 mV

            MC Low:                    85 dB, 0.25 mV – 0.5 mV

Input Resistance:                  100 ohm, 300 Ohm, 1Kohm, 47Kohm

Input Capacitance                 47 PF, 100PF, 150PF, 220PF

Tube Complement:               2 pcs. 12AX7

Size:                                       17 in. (W) x 13 in. (D) x 2 in. (H)

Weight:                                   10 lbs., 14 lbs. Boxed

Warranty:                               One year parts and labor, 3 months on tubes


Construction Details and Features:  

o  Phono pre-amplifier that will handle MM, MC and Dynamic head cartridges.

o  Lowest Rated sensitivity at .25 mV – 85 dB.

o  Low noise -57 dB

o  Two Outputs RIAA, Line stage.

o  Adjustable settings for cartridge type

o State of the Art Components: Gold plated RCA input


o  R Transformer and Heavy duty Voltage Regulator

o  Low profile full body allows the unit to act as a base for your amplifier or turntable.

    No need to lose another shelf for a component.

o  Tube Output  

Warranty:  One year parts and labor, 3 months on tubes

  • AXPONA 2017 Gold Award
Client Testimonials
  • There is tight and nice lower bass that adds to the bass excitement. The mids are lush and transparent. The highs are extended without being etchy. There is nice air around the instruments. This is a warm sounding tube amp without any tube veiling.

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  • JoLida made its name with what used to be called "popular priced" tubed electronics that offered exceptional value-for-dollar.

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