Skip to content
  1. šŸšš Free Shipping on Orders over $99 to Continental US
  2. 10% OFF 4ļøāƒ£ or MORE Records Every Day! details
  3. šŸ”“ Save On Audio Gear shop gear specials

PA555 Tube Pre Amp

SKU eq-1481

4-channel preamp w/ warm tube sound
1 Review
| 1 answered question
sale $275.00
  • Get more info on our FREE SHIPPING terms
  • šŸ“¦ Standard Shipping ships within 1-3 Business Days
  • šŸŒŽ International Shipping Experts, Fully Tracked
  • ā‡Ø Need a gear recommendation or a customized package?
  • Contact our support team for all your questions!

    Contact support for recommendations or customization questions

    We answer requests Mon-Fri 10am-6pm EST

  • Lab Overview
  • Review & Q+A

Lab Overview


  • all analog 4-channel tubeĀ preamp
  • adds warm tube sound (from 12AX7 tube) to any line level input source
  • (3) stereo RCA inputs + (1) 1/8" input on front panel
  • rotary input selector + volume control
  • gold-plated RCA inputs and outputs, and grounding connection
  • metal casing w/ vibration damping feet

"The PA555 uses one 12AX7 tube running at 150 volts. The input signal is connected directly to the grid of the tube and all of the gain of the PA555 is from the 12AX7 tube. The out-put section is a pair of emitter followers to drive the output. The PA555 has a no feedback circuit or integrated circuits in the audio path, it is all analog" - Bellari


  • tube: 12AX7
  • inputs: 3x RCA stereo + 1/8" TRS stereo jack
  • output: RCA stereo
  • input Impedance: 10K ohms
  • max output gain: 11.1 dB
  • THD: 0.1%
  • S/N Ratio: 103 db, unweighted
  • frequency response: 5 Hz ā€“ 198 KHz +/- 3 db
  • crosstalk: -75 dB
  • output impedance: 100 Ohms
  • dimensions: 6" x 2.5" x 5.4" / 15.9 x 5.1 x 17.1 cm
  • weight: 2 lbs / 900 g


  • power supply
UPC: 675889055504

Review & Q+A

Labheads Also Viewed