Fireye HDB Balanced Portable Amplifiersearch

Fireye HDB Balanced Portable Amplifier

Fireye HDB Balanced Portable Amplifier

Where's the price?
To negotiate the best possible price for our members, we must agree to hide our prices externally.

A Lossless Listening Experience

Featuring a clean design, built-in battery, and four-pin balanced output (a rarity at this price point), the Fireye HDB portable amplifier allows you to get better sound quality from your audio player. The dual amp circuit boasts an LME49724 and TPA6120 amplifier, and delivers plenty of power between its three gain settings: low for sensitive IEMs, medium for higher-impedance portables, and high for everything you normally keep on a desk. Of course, providing adequate power isn't just about volume—it's about driving your headphones fully at whatever volume you enjoy, and the HDB will carry you from M50s to JH Roxannes without the need to upgrade.

Fireye HDB Balanced Portable Amplifier

More Details

With tight engineering tolerances and a finishing process yielding gorgeous results, Firestone Audio has made one of the most visually stunning aluminum-housed amps. Easy-to-connect plugs help create a secure connection for inputs and outputs, preventing quality loss. Finally, all of the included cables are fabricated from pure copper to give you the clearest possible signal.

Fireye HDB Balanced Portable Amplifier
Fireye HDB Balanced Portable Amplifier
Fireye HDB Balanced Portable Amplifier
Fireye HDB Balanced Portable Amplifier


  • Firestone Audio
  • Amplifier structure: Class-AB amplifier
  • Differential Opamp: TI - LME49724
  • Main Opamp: TI - TPA6120
  • Circuit protection: Output short / temperature protection
  • Gain boost: High, medium, and low
  • Play time: > 8 hrs continuous use
  • Charging time: 2.5 hrs via external adaptor
  • Headphone impedance: 16 – 600 ohm
  • Frequency response: 20 Hz ~ 20 kHz
  • Noise level: -112.0 dB
  • Dynamic range: 111.3 dB
  • THD: 0.0004%
  • Stereo crosstalk: -110 dB
  • Charge input: 2 mm DC jack (24V/0.5A)
  • Line input: 3.5 mm jack, 4-pin RSA (163-191J-E Kobiconn) jack
  • Line output: 3.5 mm jack, 4-pin RSA (163-191J-E Kobiconn) jack
  • Power supply: Built-in 4-serial lithium-polymer battery
  • Dimensions: 4.8 x 2.4 x 0.8 in (12 x 6 x 2 cm)
  • Weight: 6.8 oz (194 g)


  • DC 24V/0.5A adaptor
  • 22AWG OCC 3.5 mm to 4-pin stereo cable
  • 3 4-pin plugs
  • User manual


All orders will be shipped by Massdrop.

Estimated ship date is July 17, 2017 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.