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HPA-5000 XL OTL/OCL Headphone Amplifier


hi-fi+ award 2022 HPA-5000XL OTL/OCL

A hi-fi+ Product of the Year Award winner for 2022!

READ THE REVIEW HERE: hi-fi+ HPA-5000XL Review 12-2022


The HPA- 5000 XL is Allnic Audio’s Output Transformer Less (OTL) and Output Capacitor Less (OCL) stereo headphone amplifier. The HPA- 5000 XL utilizes a true balanced Positive-Negative cancellation circuit. The HPA- 5000 XL has a voltage gain of +28dB, and a maximum output of 5 watts. Offering stunningly realistic music reproduction, it works best with headphones having an impedance of from 30 to 600 ohms.

Key Features

The HPA- 5000 XL has the following features:

  • Works best with headphones having an impedance of from 30 to 600 ohms
  • High-quality, NOS tubes
  • True OTL/OCL design
  • Pure Class A operation
  • Precision 41-step single silver contact attenuator volume control. The HPA-5000 XL does not employ a digital IC volume control or a low-cost carbon film volume control. The HPA-5000 XL has no (± 0db) channel unbalance at any volume level.
  • New vacuum tube damping technology – Allnic Audio’s patented “Absorb GEL tube damper” technology prevents harmful vibrations from reaching the driver tubes and, therefore, prevents micro-phonic noise propagation in the tubes. The Allnic Audio Absorb Gel damper technology effectively solves a problem that plagues most tube amplification systems. Provided other tube components do not introduce micro-phonic noise into your system, with the Absorb Gel damping system, you will enjoy a degree of transparent sound that will surprise and please you.
  • As are all Allnic Audio products, the HPA-5000 XL is fully RoHS (EU Reduction of Hazardous Substances regulation) compliant in construction and material.

Technical Specifications

  • Inputs: one (1) x RCA, one (1) x XLR balanced
  • Headphone Output: one (1) x one-quarter inch (1/4”), one (1) x four-pin XLR balanced
  • Frequency Response: 20Hz ~ 20KHz (flat)
  • Voltage Gain: +28dB
  • Optimum Headphone Impedance: Thirty (30) to Six hundred (600) ohms
  • Output Wattage: Five (5) watts
  • Maximum Input Voltage: Five (5) volts RMS
  • THD (Total Harmonic Distortion): Less than 0.03% (1KHz, output 1V)
  • S/ N Ratio: -68db (CCIR, 1KHz)
  • Power Consumption: 70 Watts
  • Tubes: 1 x 6AN8 (New Old Stock, first gain stage, no equivalents) 2 x E180CC (New Old Stock, Second gain stage, approximately electrically (not sonically) equivalent: CV8431, 7062, 5965, 12AV7, 6414, 6829) 4 x 7233 (New Old Stock)
  • Fuse:• AC 3A, 250V slow-blow for 110/120V regions• AC 2A, 250V slow-blow for 230/240V regions
  • Dimensions: 230mm (~9.1 inches) x 380mm (~3 inches) x 165mm (~6.5 inches) (W x D x H)
  • Weight: Unpacked: 9 kg (~19.9 lbs) Packaged: 11 kg (~24.26 lb)

Product Support

HPA-5000 XL Manual 21-07-2022


HPA-5000 XL Fullrange (S.Korea’s webzine) review

HPA-5000 review

hi-fi+ HPA-5000XL Review 12-2022

hi-fi+ award HPA-5000XL


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