Jolida JD502P Tube power amplifier

jd502p1[1]Jolida JD502P Tube Power Amplifier. A 60wpc tube power amplifier that is the JD502CRC amp without the preamp section.

The Jolida JD502P tube power amplifier is a 60wpc power amplifier using 6550 tubes or KT88 tubes. This tube amplifier allows the purest the option of choosing a preamp of his/her own desire, or one could use the Jolida Fusion Preamp with this. This is a high quality, superb preamp. The 502P is a warm, deep, mellow sounding amplifier that has plenty of power, and plenty of reserve current to drive even very difficult speaker loads. Magneplanars are no problem for this amp. This amplifier has XLR inputs.  The Jolida JD502P tube power amplifier will drive 12 ohm and 16 ohm speakers without trouble. I am assured of this by Jolida. No problem.  Try the Jolida JD502P Tube power amplifier without risk. If you are not completely satisfied with the Jolida JD502P Tube power amplifier return it to us for full credit towards another amplifier, or refund. This amplifier is available in black or silver.

This amp has been discontinued and the last unit has been sold. It is now replaced with the Fusion 3502P amp. This amp looks just like the 502P, but already has the level on upgrade included- better  quality internals. See page for 3502P. It is like the 3502S, but without the preamp section.

Construction Details and Features:

  • Stereo Power Amplifier: Input 1.2 V driving 60 watts, maximum 85 watts output.
  • Multiple Inputs: RCA and XLR inputs.
  • Custom Wound Audio Transformers with a core of German grain oriented silicon steel. 15th generation proprietary design.  Secondary can be configured for a 4 ohm or 8 ohm load.
  • Top panel bias testing terminal with bias adjustment controls plus EZ-biasing.
  • State of the Art Components: Hexfred Diodes, ceramic composite grid resistors, custom coupling caps.
  • Low Feedback Design: Only 5 dB
Technical Specifications:
Maximum Power Output: 85 W per channel at 8 ohms,  1KHz
Rated Output Power: 60 W per channel at 8 ohms, 22Hz to 60KHz
Frequency Response: (at 1 watt into 8 ohms) 8Hz to 130KHz + 1dB
Bandwidth: 15Hz to 80KHz + 3dB; 0dB 60 W 1KHz
Distortion THD: Less than 1% at 20 V output, 28Hz to 15KHz
Circuit Type: Ultra Linear, Class AB
Input Impedance: 100Kohms
Input Sensitivity: 1.2 V at 1KHz for 60 watt output
Output Impedance: 4 ohms and 8 ohms
Negative Feedback: Less than 5 dB
Noise and Hum: 85dB below rated output
Tube Complement: 2 matched pairs (4) of 6550/KT88 power output; 2 pcs. 12AX7A/ECC83 pre-amplifier; 2 pcs. 12AT7/ECC81 power drivers
Power Requirements: 110V-120 VAC 60Hz 180 watts-standby, 450 watts maximum (220 VAC 50Hz option)
Dimensions: 17 inches (43cm) wide by 15 inches (38cm) deep by 7.5 inches (19 cm) high
Weight: 50 pounds (18 Kg) net, approximately 55 pounds (21 Kg) packaged
Warranty: Two year limited parts and labor. One year or 3000 hours whichever comes first on Jolida Tubes.
Bias Settings: 500 millivolts + 50 mV
Fuse: 110 – 120 VAC, 6.3 Amp Fast Blo; 200 – 240 VAC, 3 Amp Fast Blo Size 5mm X 20mm