DBX Mini Pre User Guide

8760 S. Sandy Pkwy.

Sandy, Utah 84070

Phone [phone]

Fax [phone]

Int’l Fax [phone]

[e-mail]

http://www.dbxpro.com

A Harman International Company

18-1789-A 06/01

Mini-Pre

Vacuum Tube Microphone Preamplifier

®

dbx Professional Products has been redefining the stan­dard of Professional Signal Processing for 30 years. From
the 386 Tube Microphone Preamp to the 586 Dual

Channel Tube Microphone Preamp, dbx has been the

Professional’s choice when it comes to the clas-

sic sound of tube microphone preamps.

In this same tradition, dbx is proud to intro­duce the all-new Mini-Pre Vacuum Tube
Microphone Preamp. The Mini-Pre takes the

classic dbx Tube Microphone Preamp sound

and puts it in an easy to use, compact, afford-

able package. With the new dbx Mini-Pre

Vacuum Tube Microphone Preamp you will no

longer need to compromise tone for affordability.

Classic dbx Tube Microphone Preamp tone, portability and affordability are the hallmarks of this new micro­phone preamp from dbx. From its uncompromising crystal-clear, high-bandwidth, low-noise circuitry, to its
road-worthy construction, the Mini-Pre offers a feature set that includes: a hand- selected, Soviet-made pre­mium 12AX7 vacuum tube to add warmth and tone to any microphone signal, selectable 48 volt phantom
power, 20 dB Pad and Phase reverse switch, the new Vacuum Tube Mini-Pre has the features that you would
expect, at a price that would have been unthinkable just a few years ago.

• Single channel tube microphone
preamp

• Hand-selected, Soviet-made,
premium 12AX7 vacuum tube

• 60 dB gain and -∞ to +10dB of
output level

• XLR microphone input

• 1/4” TS line input

• Balanced 1/4” TRS and XLR outputs

• Selectable +48 volt phantom power

• 20 dB Pad

• Phase reverse switch

• Peak LED

Vacuum Tube Microphone Preamplifier

Mini-Pre

dbx engineers are constantly working to improve the quality of our products. Specifications
are, therefore subject to change without notice.

FOR MORE INFORMATION CONTACT:

dbx Professional Products

8760 S. Sandy Pkwy.

Sandy, Utah 84070

Phone [phone]

Fax [phone]

[e-mail]

http://www.dbxpro.com

A Harman International Company

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 “A-

weighted”

Line Input

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

Connector:

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

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

“A-weighted”

Power Supply

Operating Voltage:
JA: 100VAC 50/60Hz
DO: 120VAC 60Hz,
EU: 230VAC 50/60 Hz

Power Requirements: 9VAC 1300ma (12 watt typical power consumption)