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Compact black desktop headphone amplifier with front 6.35mm jack and rear RCA ports

Topping Inc.

Topping Inc. L30 II Linear Headphone Amp Black

SKU CH-4BYH-XNEWY

A linear headphone amplifier with RCA input and output, 6.35 mm jack and three gain settings delivers 37 Vpp output voltage and 0.00006% THD+N

  • TypeBoomboxes
  • ColorBlack
  • Redesigned NFCA module delivers 2× output power at 300 Ω load
  • 3 µV noise floor and 144 dB dynamic range ensure transparent sound
  • 37 Vpp output voltage and high current drive virtually any headphone
  • Three gain settings (L/M/H) match sensitivity from IEMs to planars
  • RCA in and out plus 6.35 mm jack with 3.5 mm adaptor for flexible system integration

Designed for demanding headphone listening

The Topping L30 II is a linear headphone amplifier built for desktop audio. It targets listeners who want measurable transparency with difficult headphone loads. The unit accepts RCA line-level input and provides a 6.35 mm headphone output plus RCA preamp output. A 3.5 mm adaptor is included for portable headphones.

RCA-only analogue chain limits connectivity

The amplifier offers one stereo RCA input and one stereo RCA line output. No digital inputs, balanced connections or wireless links are present. Gain is selectable in three steps labelled L, M and H. Power comes from an external 15 VAC 1 A adapter at 50 Hz or 60 Hz via a 5.5 mm × 2.5 mm DC barrel jack.

37 Vpp output voltage drives high-impedance models

Measured output reaches 37 Vpp, with 0.3 µV noise, 144 dB dynamic range and 0.00006 % THD+N. At a 300 Ω load the L30 II delivers twice the power of its predecessor. Low output impedance and high current also suit low-sensitivity and low-impedance headphones. Buyers who need balanced drive or digital decoding should look elsewhere.

Highlights

  • Redesigned NFCA module delivers 2× output power at 300 Ω load
  • 3 µV noise floor and 144 dB dynamic range ensure transparent sound
  • 37 Vpp output voltage and high current drive virtually any headphone
  • Three gain settings (L/M/H) match sensitivity from IEMs to planars
  • RCA in and out plus 6.35 mm jack with 3.5 mm adaptor for flexible system integration

Specifications

TypeBoomboxes
ColorBlack

Questions about this item

Should I pick the low, medium or high gain setting for my headphones?

Low gain suits sensitive in-ears, medium covers most portable and desktop headphones, and high adds the voltage headroom needed for 300 ohm or harder-to-drive models.

What does the 37 Vpp output voltage actually deliver at the 6.35 mm jack?

It provides enough swing to drive high-impedance headphones cleanly and gives low-sensitivity planar models the current they need without clipping.

Does the RCA line-out pass the signal through unchanged or is it affected by the gain switch?

The RCA output is a fixed-level line out, so the gain setting only changes the headphone jack level.

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