Locomotive Copperline Shop all Locomotive Audio

Introducing the Copperline, a remarkable utility unit designed to revolutionize your audio workflow. Whether positioned between a microphone and preamp or connecting two line-level devices, this two-channel powerhouse is packed with invaluable features that will elevate your sound to new heights. With a 5-position attenuator, 5-position high pass filter, mute, vintage load, polarity control, and a groundbreaking variable voltage phantom power, the Copperline empowers you to creatively shape and transform your audio signals like never before.

UNLEASH THE POWER OF PHANTOM POWER
At the core of your recording chain lies the microphone, relying on the quality of its power source. Phantom power, often taken for granted, plays a crucial role in delivering pristine audio. Yet not all phantom power supplies are created equal. Why settle for generic, "whatever works" options when your cherished microphone collection deserves the best?
Enter the Locomotive Copperline, offering up to 52 volts of phantom power from a high current, quiet supply. Experience the unparalleled difference as your microphones come to life, exhibiting enhanced detail and transient response that surpasses low-cost supplies or preamps treating phantom power as an afterthought.

PRESERVE YOUR VINTAGE GEAR WITH SLOW-START PHANTOM POWER
Protect your prized vintage input transformers and eliminate turn-on pops with the Copperline's slow-start phantom power. By gradually introducing phantom voltage over a 5-second period, this innovative feature prevents voltage transients at the mic preamp input. Furthermore, the gentle rise in phantom power voltage ensures a smooth startup, safeguarding your vintage input transformers from potential damage. Bid farewell to the unfortunate tales of vintage modules harmed by sudden spikes in phantom power. With the Copperline, your equipment is shielded from harm.

UNLEASH CREATIVE POSSIBILITIES WITH VARIABLE VOLTAGE PHANTOM POWER
Unleash a world of sonic exploration with the Copperline's groundbreaking Variable Voltage Phantom Power. This unique feature allows you to adjust the voltage sent to your microphone, thereby influencing its behavior and tonal characteristics. With a simple twist of a knob, you can breathe new life into your phantom-powered microphone, discovering captivating new textures and colors. Embrace the thrill of audio engineering as you stumble upon happy accidents and unlock one-of-a-kind sounds that leave a lasting impression. This concept is so revolutionary that Locomotive has a pending patent for its design, showcasing its unparalleled innovation in the field.

PASSIVE SIGNAL TOOLS FOR ULTIMATE FLEXIBILITY
The Copperline serves as your ultimate sonic companion, bridging the gap between microphones and preamps or connecting two line-level devices seamlessly. Say goodbye to cumbersome XLR barrel connectors and embrace the convenience of having all your passive tools in one place.

EXPERIENCE THE VINTAGE Ω LOAD
Need to load down the signal from your device connected to the Copperline? Activate the "Vintage Ω" or "Vintage Load" switch, engaging an 825-ohm resistor across pin 2 and pin 3 of the input XLR. This feature proves invaluable when the output impedance of your connected device is high. Certain microphones and line-level devices exhibit enhanced performance with a heavier/lower Ω load. The Copperline allows you to effortlessly switch between different loading impedances, exploring new sonic possibilities with ease.

POLARITY, MUTE, AND HIGH PASS FILTERING
Easily reverse the polarity of your signal with the Polarity switch, providing further flexibility in shaping your sound. Mute your signal independently, allowing for troubleshooting and quick adjustments without altering other settings. The 5-position High Pass Filter offers precise control over your audio, with options ranging from Off, 45 Hz, 75 Hz, 150 Hz, to 300 Hz. This custom-designed, low-noise high pass filter ensures exceptional performance, catering to various microphone output impedances.

UNLEASH THE COPPERLINE'S FULL POTENTIAL
The Copperline's 5-position Rotary Switch Attenuator Pad delivers versatile attenuation options, offering levels of unity, 15 dB, 20 dB, 30 dB, and 40 dB. By combining the features of Channel 1 and Channel 2, you can unlock even greater potential. Stack attenuations, alter the order of operations, or explore the possibilities of cascading high pass filters. The Copperline empowers you to experiment and push the boundaries of audio engineering.