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Headphones amplifiers — Erzetich Audio Bacillus II +
Description, images, technical data and specifications
Erzetich Audio Bacillus II +
Image source — © Erzetich Audio
The Bacillus II + is a headphone amplifier from Erzetich Audio, sitting above the Bacillus II with double the output power and an even more extraordinary bandwidth. The Bacillus II + brings Erzetich's more accomplished current engineering to dedicated headphone amplification.
Key specs that matter
Maximum power reaches 314mW into 32 ohms - double the standard Bacillus II's 157mW. Frequency response spans an extraordinary 0.5Hz to 900,000Hz within plus-or-minus 3dB - an even wider bandwidth than the standard Bacillus II. At 260 x 105 x 240mm and 2.99kg, the Bacillus II + represents a considerably more substantial commitment than the standard Bacillus II.
Sound and use context
Expect clean, detailed amplification reflecting the extraordinarily wide 0.5Hz-900kHz bandwidth combined with the doubled 314mW output, representing Erzetich's more accomplished current headphone amplifier engineering ambition.
Pairing
The doubled 314mW output handles a genuinely wider variety of headphone loads than the standard Bacillus II, including moderately demanding designs.
Alternatives
Erzetich Audio's own standard Bacillus II offers a more compact, more accessible alternative within the same broader catalogue. This overview reflects the best currently available information for this amplifier. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision, particularly for a component that will anchor a broader system investment. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Ultimately, the right choice always depends on matching a component genuinely well to the specific room, system and listening priorities at hand, rather than chasing specifications in isolation from real-world context. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market, with a dealer able to confirm final fit and compatibility for a specific system and room.
Key specs that matter
Maximum power reaches 314mW into 32 ohms - double the standard Bacillus II's 157mW. Frequency response spans an extraordinary 0.5Hz to 900,000Hz within plus-or-minus 3dB - an even wider bandwidth than the standard Bacillus II. At 260 x 105 x 240mm and 2.99kg, the Bacillus II + represents a considerably more substantial commitment than the standard Bacillus II.
Sound and use context
Expect clean, detailed amplification reflecting the extraordinarily wide 0.5Hz-900kHz bandwidth combined with the doubled 314mW output, representing Erzetich's more accomplished current headphone amplifier engineering ambition.
Pairing
The doubled 314mW output handles a genuinely wider variety of headphone loads than the standard Bacillus II, including moderately demanding designs.
Alternatives
Erzetich Audio's own standard Bacillus II offers a more compact, more accessible alternative within the same broader catalogue. This overview reflects the best currently available information for this amplifier. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision, particularly for a component that will anchor a broader system investment. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Ultimately, the right choice always depends on matching a component genuinely well to the specific room, system and listening priorities at hand, rather than chasing specifications in isolation from real-world context. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market, with a dealer able to confirm final fit and compatibility for a specific system and room.
Specifications
Model name
Bacillus II +
Maximum Power, 32 Ohms (mW RMS per channel)
314
Maximum Power, 50 Ohms (mW RMS per channel)
N/A
Maximum Power, 300 Ohms (mW RMS per channel)
N/A
Maximum Power, 600 Ohms (mW RMS per channel)
N/A
Frequency response low +/- 3dB (Hz)
0.5
Frequency response high +/- 3dB (Hz)
900 000
Gain (dBu)
N/A
THD (% at 1V RMS, 300 ohms)
N/A
Signal to Noise Ratio (dB)
N/A
IMD (%, CCIR, 300 Ohms)
N/A
Crosstalk (dB, 20Hz-20KHz, 300 Ohms)
N/A
Output Impedance (Ohms)
N/A
Dimensions (mm)
260 x 105 x 240
Weight (kg)
2.99
Official link
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