Presonus Audio electronic Single-Channel Tube user manual Vacuum Tubes, Replacing the Vacuum Tube

Page 12

2 CONTROLS & OPERATION

2.3 VACUUM TUBES

The DigiTUBE comes supplied with a 12AX7 vacuum tube that provides excel- lent performance characteristics. We encourage owners of the DigiTUBE to try different brands of 12AX7 vacuum tubes to investigate the various performance possibilities they might provide.

2.3.1 REPLACING THE VACUUM TUBE

1.Disconnect the DigiTUBE from it’s electrical outlet.

2.Remove the six screws that attach the top of the unit’s chassis. The vacuum tube is mounted in a horizontal fashion in the middle of the DigiTUBE’s body.

3.Carefully remove the vacuum tube from it’s receptacle. Be sure to hold the socket in place while gently wiggling the vacuum tube out.

4.Insert the replacement vacuum tube into the receptacle. Care should be taken to properly align the pins on the vacuum tube to the corresponding holes in the receptacle. (Caution should also be taken to not break the circuitboard.)

5.Replace the top of the DigiTUBE.

6.Restore power to the unit and resume operation.

Remember, tube life and performance are affected by how often a tube is used and by how ‘hard’ the tube is driven when in use. Signs of wear may be exhibited by poor performance or by the tube becoming ‘microphonic’. Periodic replacement of the vacuum tube is recommended. The time interval for tube replacement may vary greatly. If you notice deterioration in sound quality then it’s probably time to change the vacuum tube.

2.4 POWER SUPPLY

This unit is supplied with an external power supply designed to operate at the required voltage of the country where the retail sale occurred. Use of a power supply other than one supplied with the unit constitutes an infringement of the warranty and effectively voids it. Use of an improper power supply may damage the unit and could pose serious danger of electrical shock or fire.

10

Page 11 Page 13
Image 12
Page 11 Page 13
Contents DigiTUBE Table of Contents Overview IntroductionGood luck and enjoy your DigiTUBE Features Drive Internal ClockControls & Operation Front PanelFront panel of the DigiTUBE contains Tube Preamp SectionGain Their own built-in pre-amp not to overdrive the 1⁄4EQ in Switch InputLow Straight up, twelve o’clock, position is labeled zero80Hz Switch MidFrequencies from 900Hz to 5kHz. The outer ring Inner knob by plus or minus twelve decibels withMetering Back Panel Analog SectionTRS Insert XLR Output JackPower Supply Vacuum TubesReplacing the Vacuum Tube Disconnect the DigiTUBE from it’s electrical outletControls & Operation Technical Specifications PerformanceOutput Front Panel ControlsPower Supply PhysicalPresonus Limited Warranty United StatesOutside of the United States

Single-Channel Tube specifications

Presonus Audio's single-channel tube preamp is a game-changer for musicians, producers, and audio engineers looking to add warmth and character to their recordings. This device is designed to enhance any microphone or instrument signal, offering a blend of classic tube technology and modern engineering to produce a rich, detailed sound.

One of the primary features of this single-channel tube preamp is its all-tube signal path. By utilizing high-quality vacuum tubes, this preamp delivers a smooth and harmonic-rich sound that is often described as warm and lush. This characteristic makes it ideal for vocal recordings, capturing the nuances of a singer's performance, and bringing out the richness in acoustic instruments.

The preamp also incorporates a wide range of input options, including XLR and 1/4-inch connections, allowing users to easily connect various microphones and instruments. The built-in 48V phantom power provides versatility for condenser microphones, enabling users to achieve high-quality recordings without the need for additional power supplies.

Another notable technology featured in the Presonus single-channel tube preamp is the variable impedance control. This feature allows users to adjust the input impedance to match the specific needs of their microphone or instrument, optimizing the signal for better sonic clarity and detail. This flexibility ensures that every source is treated with the appropriate sonic characteristics, enhancing the overall recording quality.

In addition to its stellar sound capabilities, the preamp is equipped with a high-resolution LED metering system, providing real-time visual feedback of signal levels. This feature is essential for preventing clipping and ensuring optimal recording levels, which is critical in professional studio settings.

Furthermore, the unit includes a user-friendly interface with intuitive controls for gain, treble, mid, and bass adjustments. These features enable sound shaping on-the-fly, giving users creative control over their audio signals. The rugged build quality also ensures durability in both studio and live settings, making it a reliable choice for professionals on the go.

Overall, Presonus Audio's single-channel tube preamp showcases a perfect blend of classic tube warmth and modern functionality. With its versatile connectivity, intuitive controls, and high-quality sound, it remains a powerful tool for anyone serious about achieving professional-grade audio recordings. Whether for studio use or live performance, this preamp undoubtedly enhances any audio setup.
Top Page Image Contents