Capella upgrade modification Since the introduction of the Capella headphone amplifier there have been questions asked on forums about how to improve the Capella even further so that it then becomes an even greater value for money headphone amp. After a lot of thinking and experimenting we finally managed to come up with a solution that would allow existing Capella owners to benefit from the same upgrade modification. Due to safety issues, and the cramped design of the Capella PCB there is no DIY upgrade option. Each Capella would have to be returned to us for the upgrade to be carried out. How headphones and amplifiers interact Headphones are available with low, medium, or high impedance. Low impedance headphones are in the range 16 to 32 ohms and high- impedance headphones are about 100 to 600 ohms. As the impedance of a pair of headphones increases, more voltage (at a given current) is required to drive it, and the loudness of the headphones for a given voltage decreases. The impedance of a headphone directly affects the loudness of  the headphone amplifier. For any given headphone amplifier, a lower impedance headphone will sound louder and more efficient, but will also draw a lot more current . A higher impedance headphone will draw less current, but will produce less sound for a given output level on the volume control. What is the upgrade, and what does it do? The Capella output stage buffer that supplies the audio power to drive the various headphone loads is replaced with one that can provide a greater amount of current and voltage to the headphone socket, and with far less distortion. This improves the quality of the sound that you hear, and the output level of the signal with difficult to drive headphones. The new output stage also provides a wider dynamic range, larger sound output level (i.e. louder), and a clearer and more detailed signal. The output from the Capella is now super quiet, thanks to the more advanced output stage. The modified Capella is now also able to take full advantage of a 15Volts DC power supply if one is used instead of the regular 12V power supply. The difference and improvements in the signal can be clearly heard when switching between 12 and 15V with the upgraded Capella. Please note that the 15V power supply is not included in the upgrade package. We have a limited amount of SMPS type 15V power supplies, which can be supplied upon request and availability. But for best results, a regulated linear power supply is highly recommended. email us if you are interested Delivery to anywhere in the EU only.

Capella upgrade modification Since the introduction of the Capella headphone amplifier there have been questions asked on forums about how to improve the Capella even further so that it then becomes an even greater value for money headphone amp. After a lot of thinking and experimenting we finally managed to come up with a solution that would allow existing Capella owners to benefit from the same upgrade modification. Due to safety issues, and the cramped design of the Capella PCB there is no DIY upgrade option. Each Capella would have to be returned to us for the upgrade to be carried out. How headphones and amplifiers interact Headphones are available with low, medium, or high impedance. Low impedance headphones are in the range 16 to 32 ohms and high-impedance headphones are about 100 to 600 ohms. As the impedance of a pair of headphones increases, more voltage (at a given current) is required to drive it, and the loudness of the headphones for a given voltage decreases. The impedance of a headphone directly affects the loudness of  the headphone amplifier. For any given headphone amplifier, a lower impedance headphone will sound louder and more efficient, but will also draw a lot more current . A higher impedance headphone will draw less current, but will produce less sound for a given output level on the volume control. What is the upgrade, and what does it do? The Capella output stage buffer that supplies the audio power to drive the various headphone loads is replaced with one that can provide a greater amount of current and voltage to the headphone socket, and with far less distortion. This improves the quality of the sound that you hear, and the output level of the signal with difficult to drive headphones. The new output stage also provides a wider dynamic range, larger sound output level (i.e. louder), and a clearer and more detailed signal. The output from the Capella is now super quiet, thanks to the more advanced output stage. The modified Capella is now also able to take full advantage of a 15Volts DC power supply if one is used instead of the regular 12V power supply. The difference and improvements in the signal can be clearly heard when switching between 12 and 15V with the upgraded Capella. Please note that the 15V power supply is not included in the upgrade package. We have a limited amount of SMPS type 15V power supplies, which can be supplied upon request and availability. But for best results, a regulated linear power supply is highly recommended. email us if you are interested Delivery to anywhere in the EU only.