Erzetcich Bacillus II+ Headphone Amplifier

Description

The new Erzetich Bacillus II+ is hand crafted in Slovenia and features a dual-mono architecture, triple-reinforced power supply, balanced and unbalanced connectivity, and premium European craftsmanship. The Bacillus II+ delivers fast, detailed, and highly immersive sound for demanding headphones. It represents a major evolution of Erzetich Audio’s compact amplifier platform and was designed to bring flagship-level engineering into a more desktop-friendly form factor. The Bacillus II+ combines audiophile performance, premium materials, and industrial artistry into a uniquely distinctive headphone amplifier.

At the core of the Bacillus II+ is a fully balanced dual-mono Class-AB topology with dedicated power supply sections for each channel and auxiliary electronics. This triple-reinforced power supply design dramatically improves channel separation, transient speed, and overall dynamic precision while minimizing interference and distortion. Compared to the standard Bacillus II, the II+ doubles both speed and power while offering significantly greater control over difficult planar magnetic and high-end dynamic headphones.

The amplifier is designed to drive headphones ranging from 8 to 600 ohms, making it highly versatile across a wide range of audiophile headphones including demanding planar magnetic models. Reviewers consistently describe the Bacillus II+ as detailed, powerful, smooth, and highly controlled with exceptional bass authority and a spacious layered presentation.

Internally, Erzetich employs premium audiophile-grade components including Obbligato Premium Gold capacitors, silver-plated copper internal wiring, high-grade operational amplifiers, and a precision quad Blue Velvet Alps potentiometer. The fully balanced architecture allows the Bacillus II+ to achieve remarkable speed, transparency, and low-noise performance without sounding analytical or sterile.

Connectivity is exceptionally flexible for a boutique amplifier of this size. The Bacillus II+ includes both balanced XLR and unbalanced RCA inputs along with balanced 4-pin XLR and unbalanced 6.35 mm headphone outputs. This allows the amplifier to integrate easily into both balanced and traditional single-ended hi-fi systems.

Visually, the Bacillus II+ carries the unmistakable Erzetich industrial design language inspired by the company’s flagship Scylla and Deimos amplifiers. The robust steel chassis provides excellent durability and magnetic shielding while handcrafted wooden side panels add warmth and artisanal character. The large sculpted volume knob and angular chassis design give the amplifier a unique aesthetic rarely seen in modern desktop audio equipment.

Erzetich also emphasizes sustainability and long-term ownership. The Bacillus II+ is fully serviceable, handmade in small production batches, and backed by a 5-year limited warranty. Several internal components are socketed and accessible, allowing future maintenance and upgrades rather than disposable ownership.

Audiophile reviewers have praised the Bacillus II+ for combining boutique craftsmanship with high-end sonic performance. Reviews frequently highlight its deep bass authority, expansive imaging, smooth treble presentation, and ability to extract micro-detail while remaining musical and engaging.

Specifications:

• Product Type: Fully balanced headphone amplifier

• Amplifier Class: Class-AB

• Architecture: Fully balanced dual-mono

• Supported Headphone Impedance: 8–600 ohms

• Frequency Response (Balanced): 0.5 Hz – 900 kHz (-1 dB)

• Frequency Response (Unbalanced): 4 Hz – 450 kHz (-1 dB)

• Output Power per Channel: 314 mW balanced / 157 mW unbalanced

• Outputs: 4-pin XLR balanced, 6.35 mm jack unbalanced

• Inputs: 3-pin XLR balanced, RCA unbalanced

• Potentiometer: Quad Alps Blue Velvet

• Internal Wiring: Silver-plated copper

• Power Consumption: 9 W

• Power Supply: 230 V / 50 Hz or 115 V / 60 Hz

• Chassis Material: Steel with wooden side panels

• Dimensions: 260 × 105 × 240 mm

• Weight: 2990 g

• Character: Detailed, fast, smooth, dynamic

• Manufacturing: Handmade in Slovenia