Pro-Ject Head Box S2 Digital Headphone Amplifier and DAC

Fully Equipped for Cutting-Edge Performance

Pro-Ject's Head Box S2 Digital headphone amplifier comes fully equipped for the highest demands of the modern audiophile. It supports playback for PCM files up to 32-bit / 768 kHz and DSD decoding up to quad DSD (DSD256). It also provides a significant upgrade from the anemic headphone section built into many conventional amplifiers and lets you add headphone capability to amps and other gear that lack a headphone jack.

With five digital filters available onboard (including the proprietary Optimum transient digital filter), the sound of the Head Box S2 Digital can be shaped precisely to your liking.

Connection to a Wide Range of Devices

Three digital inputs ensure a connection to any source available, be it a personal computer via the USB B input or a TV set via the optical input. The coaxial S/PDIF input will accommodate a digital transport such as the Pro-Ject CD Box DS2 T. All inputs offer support for high resolution data up to 24-bit /192 kHz. The USB input offers full high-resolution support for all files up to PCM 32/768 and DSD256.

The front-panel 1/4" headphone jack delivers a clean and precise sound with a musical touch. Noise coming in through USB is double filtered to suppress it to a level where it can’t affect audio, for undisturbed listening experience.

Highest Quality Parts and Construction

Only the best possible components were used to create this one-of-a-kind headphone amplifier. The aluminum/metal enclosure provides the highest aesthetics and protects circuitry effectively against electromagnetic interference and vibrations.

Due to its low price combined with versatility, power and high quality sonics, the Head Box S2 Digital is an absolute audiophile bargain!

Product made in Czech Republic.

• High end ESS Sabre ESS9038 DAC
• Proprietary clock circuity design
• Organic polymer capacitors and thin film miniMELF resistors
• 32-bit / 768 kHz decoding
• DSD64, DSD128 & DSD256 (DSD over PCM)
• Up to 24-bit / 19 2kHz for optical & coax inputs
• 5 selectable digital filter characteristics
• 1 proprietary optimum transient digital filter
• Headphone output on the front (6.3mm)
• Synchronization of all internal oscillators
• Jitter as low as 100 Femtoseconds!
• Gold-plated four layer PCB
• 3 digital inputs: 1x coax (S/PDIF), 1x optical (TOSlink®), USB B
• Analog out: 1/4" Headphone Out (front), 1x Pre Out (RCA)
• D/A-converter: 1x ESS9038Q2M 32-bit PCM 768kHz / DSD256
• Headphone amplifier chip: ESS9063
• Sampling rates: 32 / 44.1 / 48 / 88.2 / 96 / 176.2 / 192 / 352.8 / 384 / 768 kHz
• Full alu/metal sandwich casing in silver or black

• DSD support: DSD64, DSD128, DSD256
• Frequency response: 20 Hz - 20 kHz
• Output voltage: 2.05 Veff
• Headphone output power: 68mW (32 Ohms)
• THD: 0.0007%
• Dynamic Range: 120dBA
• Power consumption: 5V, micro USB
• Dimensions W x H x D: 4" x 1.5" x 4.7"
• Weight: 13 oz. without power supply