Mackie DB-1A, DB-1P Owner's Manual

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INPUT

THRU

OUT IN

POWER

SPKR

PKUP

LINE

GND LIFT

OUTPUT

FEATURES

• Converts unbalanced line-level signals to balanced mic-level output

• Provides signal and impedance matching for the direct connection of instruments to ampliﬁers and mixers

• 1/4" Input jacks for connecting instrument or speaker-level signals (switch selectable)

• 1/4" Thru jack allows the unbalanced signal to be sent to an onstage ampliﬁer while the balanced signal is sent to a mixer

• Ground Lift switch helps eliminate hum and buzz problems in musical instrument hookups

• Allows use of long cables without high-frequency loss

• The DB-1A can be powered either internally by two 9-volt batteries or externally by phantom power from a mixer

• The DB-1P passive model has a noise ﬁlter for reducing buzz and hiss (switch selectable)

DB-1A

7. OUTPUT — This balanced XLR jack provides a low-impedance

mic-level signal for connecting to a microphone input on a mixer. If the mixer has phantom power, it can be used to power the DB-1A. Power automatically switches away from the internal batteries to

save battery life. Pin 1 = Ground Pin 2 = Hot (+) and in-phase with the input signal Pin 3 = Cold (–)

1. INPUT — Connect the signal source to this 1/4" unbalanced TS jack.

2. POWER LED — Indicates when the power is on. When powered

from the internal batteries, it lights when a signal is plugged into the INPUT jack. When powered from a mixer's phantom power, it lights as long as the phantom power is applied.

3. THRU — This 1/4" unbalanced TS jack is in parallel with the INPUT jack and provides a “Thru” connection of the input signal for sending to an ampliﬁer onstage.

4. PKUP/LINE — Move this switch to the left when connecting an instrument with a passive pickup, like an electric guitar. Move this switch to the right when connecting a line-level signal to the input.

5. SPKR — When connecting a speaker-level signal (for example, from a guitar ampliﬁer’s speaker output), move this switch to the right (IN).

6. GND/LIFT — of the XLR output jack. When the switch is to the left, the ground is connected, and when the switch is to the right, the ground is disconnected (LIFTED).

This switch makes or breaks the input ground to pin 1

TO INSTALL OR CHANGE THE BATTERIES:

1. Using a small phillips screwdriver, remove the four screws on each side and the two screws on the bottom of the DB-1A as shown in Figure 1.

2. Slide the tray out of the cover.

3. Install two 9-volt batteries into the battery clips and slide the batteries into the retaining bracket as shown.

4. Reassemble the DB-1A.

CAUTION: Do not use longer screws than the original

screws provided. Longer screws will short out the circuit board and void the warranty.

Figure 1

DB-1P

INPUT THRU

INST AMP

FLAT FILTER

OUTPUT

GND LIFT

1. INPUT — Connect the signal source to this 1/4" unbalanced TS jack.

2. INST/AMP — Leave this switch out when connecting an instrument

or line-level signal to the INPUT jack. Push this switch in when connecting a speaker-level signal (for example, from a guitar ampliﬁer’s speaker output).

3. FLAT/FILTER — Push this switch in to engage a high-cut ﬁlter to reduce hiss and noise when using the AMP input setting. The ﬁlter has no eﬀect when the input is set to INST (2).

4. THRU — This 1/4" unbalanced TS jack is in parallel with the INPUT jack and provides a “Thru” connection of the input signal for sending to an ampliﬁer onstage.

5. OUTPUT — This balanced XLR jack provides a low-impedance miclevel signal for connecting to a microphone input on a mixer. Pin 1 = Ground

Pin 2 = Hot (+) and in-phase with the input signal Pin 3 = Cold (–)

6. GND/LIFT — This switch makes or breaks the input ground to pin 1 of the XLR output jack. When the switch is in the OUT position, the ground is connected, and when the switch is pushed IN, the ground is disconnected (LIFTED).

It is important to keep your receipt in a safe place, and not a bad idea to write your product information

here for future reference (i.e., insurance claims, tech support, return authorization, etc.).

PRODUCT SERIAL #:

PURCHASED AT:

DATE OF PURCHASE:

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