Pro‑Ject Head Box E – Compact Discrete Headphone Amplifier
The Head Box E is a micro-sized yet powerful headphone amp designed to elevate your listening experience. Packed into a durable metal chassis, it delivers 665 mW into 32 Ω using fully discrete circuitry, making it a standout upgrade for both desktop setups and home hi‑fi systems—available now at Soundium.
Key Features
- 665 mW output @ 32 Ω: Plenty of clean power to drive demanding headphones—removes the limitation of weak headphone jacks
- Fully discrete amplifier design: Uses non-integrated components for superior signal control, repairability, and audio purity
- Dual headphone outputs: One 6.3 mm and one 3.5 mm jack, usable simultaneously for shared listening
- Line-level bypass option: Rear RCA input plus loop-out lets you integrate the amp into your stereo chain without losing signal
- Low distortion & high fidelity: THD+N <0.005%, SNR −105 dBV, frequency response 20 Hz–80 kHz (±0.2 dB)
- Compact and light: Just 10.3 × 3.7 × 12.0 cm, 0.39 kg – small enough to fit on any desk or shelf
Customer Benefits
The Head Box E brings studio-grade headphone amplification to your desktop or living room. Its robust power suits a wide range of headphones, while clean, low-noise output enhances clarity and musicality. The dual jacks support shared listening, and the loop-out feature makes it easy to slip into your existing audio setup.
Quick Specs
- Output power: 665 mW @ 32 Ω
- Frequency response: 20 Hz–80 kHz (±0.2 dB)
- THD+N: <0.005%
- SNR: −105 dBV
- Gain: 11 dB
- Crosstalk: 65 dB
- Output impedance: <1 Ω
- Headphone jacks: 6.3 mm and 3.5 mm (usable simultaneously)
- Line-level I/O: RCA input + loop output
- Power: 5 V/0.5 A DC via included USB cable
- Standby power: <0.5 W
- Dimensions: 10.3 × 3.7 × 12.0 cm
- Weight: 0.39 kg (without power supply)
What’s in the Box
- Pro‑Ject Head Box E amplifier
- USB power cable (5 V DC)
- Protective pouch
Use Cases / Ideal For
Perfect for audiophiles seeking a powerful desktop amp, vinyl listeners adding headphone capability, and anyone wanting shared listening with two jacks—clean, portable, and simple amplification.
Compatibility
Connects to any line-level source (DAC, CD player, turntable with phono stage) via RCA. Compatible with headphones from 8–600 Ω. Fits seamlessly into hi-fi chains with bypass output.
Pros & Cons
✅ Pros:
- High clean power in a compact form factor
- Discrete circuit design for superior audio performance
- Dual jacks allow shared listening without adapters
- Loop-out lets you integrate it into larger setups
⚠️ Cons:
- No DAC built in—requires external digital source
- No balanced or digital inputs
- Relies on USB adapter—no included plug-in PSU
The Pro‑Ject Head Box E delivers compact, powerful, and clean headphone amplification in a sleek metal body—perfect for audiophiles seeking quality on a desk or as part of a desktop hi-fi chain, available now at Soundium.
