dbx Pro Vacuum Tube Microphone PreAmp user manual Power Supply

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Specifications

Mini-Pre

Microphone Input

 

 

Connector:

Female XLR Pin 2 Hot

Type:

Electronically balanced/unbalanced

Impedance:

2kΩ

Maximum Input Level:

-10 dBu or +10 dBu with 20 dB pad engaged

CMRR:

Typically >80dB at 1kHz

Equivalent Input Noise:

Typically -125 typical dBu with a 150Ω source load

Line Input

“A-weighted”

 

 

Connector:

TS 1/4" Jack

Type:

Electronically unbalanced

Impedance:

>1 meg Ω

Maximum Input Level:

0 dBu or +20dBu with 20dB pad engaged

Gain

26dB to 60dB

Outputs

Male XLR Pin 2 Hot and impedance balanced TRS 1/4"

Connector:

Type:

Balanced/unbalanced

Impedance:

Balanced 600Ω, unbalanced 300Ω

Maximum Output Level:

(XLR) > +27dBu; (1/4”) > +21dBu

System Performance

 

 

Gain Control Range:

+26dB to +60dB for Mic Input

 

 

+16dB to +50dB for Line and Instrument Inputs

Output Level Control Range

-∞ to +10dB

Phantom Power:

+48V

PAD:

20dB pad

PHASE:

Reverses pins 2 and 3 of the output XLR

Frequency Response:

10Hz to 45kHz (-3dB points)

THD+Noise:

0.08% typical at -10dBu out, 1kHz, 30 dB gain

Power Supply

“A-weighted”

 

 

Operating Voltage:

 

 

JA:

100VAC 50/60Hz

DO:

120VAC 60Hz,

EU:

230VAC 50/60 Hz

Power Requirements:

9VAC 1300ma (12 watt typical power consumption)

 

 

 

 

®

 

Mini-Pre User Manual

 

 

 

 

 

 

 

 

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Contents Mini-Pre Important Safety Instructions Declaration Conformity Mini-Pre Service Contact InformationWarranty Information Mini-Pre Features Introduction and FeaturesRear Panel Descriptions from left to right Input Gain Control +24 to +60dB Balanced TRS Input ConnectorPower LED Front Panel Descriptions from left to rightOutput Control -∞to +10dB +48volt Switch+20dB Pad Switch Phase SwitchLive Applications Mini Tube Pre ApplicationsPower Supply Harman International Company

Vacuum Tube Microphone PreAmp specifications

The dbx Pro Vacuum Tube Microphone PreAmp is an exceptional piece of equipment tailored for audio professionals seeking to elevate their recordings with a touch of vintage warmth. This preamp artfully combines modern technology with classic tube circuitry, ensuring that each sound source is captured with clarity and character.

At the heart of the dbx Pro Vacuum Tube Microphone PreAmp is its dual vacuum tube design, which contributes a rich harmonic distortion that is often sought after in high-end recording environments. The use of high-performance 12AX7 tubes allows the preamp to achieve a smooth sustain while introducing a subtle depth that enhances vocal and instrumental recordings alike.

One of the standout features of the dbx Pro is its dynamic range and low noise floor. With up to 60 dB of gain available, it is capable of amplifying even the quietest sources without introducing unwanted hiss or noise. This makes it a versatile choice for a variety of microphones, from sensitive condensers to more robust dynamic mics. The preamp also includes a 20 dB pad that can be engaged for high-SPL sources, preventing distortion and ensuring that recordings remain pristine.

Another critical aspect of this preamp is its integral EQ section. The dbx Pro offers a simple yet effective three-band EQ, allowing users to fine-tune frequencies before hitting the recording path. This can be particularly beneficial for shaping tone on the fly, making it easier to achieve the desired sound without the need for extensive post-processing.

The build quality of the dbx Pro is equally impressive. Constructed with a robust metal chassis, it is designed to withstand the rigors of professional use while providing a reliable platform for high-quality audio capture. The preamp features balanced XLR inputs and outputs, ensuring compatibility with a wide range of studio gear and facilitating easy integration into existing setups.

In summary, the dbx Pro Vacuum Tube Microphone PreAmp stands out with its exceptional sound quality, vintage warmth, and practical features. With its dual vacuum tube circuitry, extensive gain range, integrated EQ, and sturdy construction, it is an ideal choice for audio engineers and musicians aiming to achieve professional results. Whether for tracking vocals, instruments, or adding nuance to live performances, this preamp is a valuable tool in any audio arsenal.