Bottlehead Crackatwoa Headphone Amplifier

This amplifier is specifically optimized for high-impedance headphones, generally those rated at 200 ohms or higher. It will not provide the ideal power delivery or damping factor for low-impedance planar magnetic or sensitive in-ear monitors.

This kit is designed for the experienced builder. You should be comfortable reading schematic diagrams, performing point-to-point wiring, and working with high-voltage circuits safely.

Yes, the unit features an integrated volume control, allowing you to connect your source components directly to the amplifier without needing a separate preamp.

The Speedball upgrade improves the amplifier's dynamic range and transient response. It helps the circuit maintain consistent performance, resulting in tighter bass control and a more precise, punchy sound compared to standard designs.

Yes, the chassis is equipped with three switchable RCA inputs. This allows you to connect up to three different source devices—such as a DAC, a CD player, or a streamer—and toggle between them easily.

Shunt voltage regulation provides a more stable power supply to the circuit, which significantly lowers the noise floor. This results in a quieter background, allowing you to hear finer details in the music that might otherwise be masked by power supply hum.