LD-10 - Digital decoder PAC - Free user manual and instructions

Product Type	Digital decoder / Audio line driver
Brand	PAC (Pacific Accessory Corporation)
Model	LD-10
Input	Female RCA (Left and Right), max input signal 12V
Output	Male RCA or bare 18 AWG wires, configurable ground isolation
Output Voltage	2.8V RMS (up to 8V peak-to-peak)
Gain	Adjustable via potentiometers (10x boost)
Power Supply	12V DC, constant or switched ACC; draw 20 mA
Power Consumption	Low, 20 milliamps
Ground Isolation	Solid state isolation on both input signals; configurable output grounding via cut loops
Noise Rejection	Powerful power supply noise rejection
Dimensions (approx)	2.5 x 1.5 x 0.75 inches
Weight (approx)	0.2 lbs
Installation	Connect black to ground, red to 12V+, input RCA to source, output to amplifier; adjust pots
Compatibility	Works with portable satellite receivers, OEM head units, DSP processors, aftermarket video, phone kits
Maintenance	Wipe with dry cloth; keep away from moisture
Safety Notes	Avoid over-driving amplifier inputs; tape exposed male RCA shields to prevent grounding
Reparability	Cut loops inside for ground isolation; no user-serviceable parts otherwise
Warranty	Refer to manufacturer; contact tech support
Country of Origin	USA (Santa Ana, CA)

Frequently Asked Questions - LD-10 PAC

How do I connect the PAC LD-10?

Connect the black wire to a clean chassis or harness ground, red wire to a 12V+ constant or switched source, input RCA cables from your source to the female RCA inputs labeled 'IN L' and 'IN R', and output RCA or bare wires to your amplifier.

What is the maximum input voltage for the LD-10?

The maximum input signal is 12V. Exceeding this may damage the device.

How do I adjust the gain on the LD-10?

Set both potentiometers to the lowest level initially. Then set your source volume to about 75% (if adjustable). Gradually turn the LD-10 pots up to match the volume of other sources, ensuring you don't over-drive the amplifier.

What does the ground isolation feature do?

The solid state isolation eliminates ground loops that cause hum. The LD-10 also has cut loops inside to isolate output grounds for differential inputs, if needed.

When should I cut the black loops inside the LD-10?

Cut the loops if your amplifier has differential inputs and you experience noise. Example: in GM SUVs with factory Bose amps, cutting loops eliminates buzzing. Most applications do not require this.

Can I use the LD-10 with a factory stereo?

Yes, the LD-10 is designed to boost low-level signals from OEM head units, DSP processors, and other factory equipment.

What is the output voltage of the LD-10?

The output is 2.8V RMS typical, but can reach up to 8V peak-to-peak. This provides a 10x boost over typical 0.3V inputs.

How much power does the LD-10 consume?

Very low power consumption at 20 milliamps (0.02A) from a 12V supply.

What should I do if I experience noise after installation?

Check grounding: ensure the black wire is connected to a clean metal chassis ground. If noise persists, try cutting the internal ground loops as described in the manual. Also verify that RCA shields are not touching ground.

Is the PAC LD-10 compatible with aftermarket amplifiers?

Yes, it works with most amplifiers. However, because the output can be high, set gains carefully to avoid clipping or over-driving the amplifier inputs.

USER MANUAL LD-10 PAC

Two black cables connected to a black electronic device labeled 'PAC' (no visible text or symbols on the device body)

• Solid state ground-loop isolation
  • Powerful power supply noise rejection
• Adjustable Gain levels
• Low 20 milliampere power consumption.
  · 2.8 Volt RMS signal output
  • Pre-Amplifies, and drives differential or single-ended amplifier inputs
• Configurable Output Ground Isolation

LD-10 provides a quick and easy 10X boost to low level signals from portable satellite receivers, OEM head units, DSP processors, aftermarket video, phone kits or whatever needs an audio boost. No need to worry about ground loops with LD-10's solid state isolation on both input signals. Max input signal is 12V.

1. Easy Installation

1. Connect black wire to chassis or harness ground.
2. Connect red wire to a 12V+ DC constant source, a switched ACC power, or a relay switched by a remote Amplifier turn-on lead.
3. Connect your input audio signals to the female RCA inputs on the black Pacific Accessory Corporation LD-10 labeled "IN L" and "IN R"
4. Set pots to lowest level on the LD-10
5. Connect the output leads RCA's on the wire harness, or if it is more convenient for your application, cut off the RCA, and use the 18 AWG wires directly.

** tape up any exposed male RCA shields to prevent inadvertent grounding to chassis.**

2. Seamless Operation

Because LD-10's output can reach 8 Volts peak to peak; it is easily possible to over-drive some amplifier inputs. For optimal results, adjust the gains & volumes systematically: Step #1: Set both LD-10 pots to lowest level.

Step #2: Set source volume to appx. 75% such that the output is not distorted (not applicable to fixed volume devices like some DVD players)

Step #3: Turn pots on LD-10 to match volume on the FM or other source.

Step #4: With a large signal on your source, verify that you are not over-driving any components with LD-10's output.

3. Grounding Notes

To prevent noise in most applications, the output signal grounds are connected to the main LD-10 ground. However, in rare cases, some amplifiers have noise when these audio grounds are grounded. In such applications, we provide cut loops to facilitate this isolation. To isolate: simply pop open LD-10's black box, identify the two black loops near the harness connector; Cut both.

When the black loops are intact, the output RCA shields are ground referenced: i.e. continuity to ground. Some power amps expect a differential input and can't deal with audio negatives trunked together... By cutting LD-10's black cut-loops, you float the grounds so they are now "loosely" referenced to ground through a capacitor and 100K resistor. Example: In a GM SUV, to drive the differential inputs on a factory Bose amp, you need to cut the loops to eliminate some amplifier buzzing noise. Most applications will never need these loops cut.

Pacific Accessory Corporation

1340 Ritchey St.

Santa Ana, CA 92705

[e-mail]

www.pac-audio.com • Ph: 866-931-8021

© 2009 Pacific Accessory Corporation