OSD PRE 1 - Stereo Pre Amplifier Manual

Front Panel Description

1. Power ON / OFF
2. Microphone Jack Input
3. Mic Level Control
4. Bass Control: To boost or attenuate low frequency sound.
5. Midrange Control: To boost or attenuate midrange frequency sound.
6. Treble Control: To boost or attenuate high frequency sound.
7. Loudness: To compensate for the non-linear response of the human ear at low volume.
8. Balance: Controls the relative volume between the left/right speakers and headphone.
9. Master Volume: Adjusts the main output volume level of speakers and headphones.
10. Input Selector: Switch between multiple input sources.
11. Tape: Input for an analog tape deck
12. Mono: Switch between mono or stereo signal
13. Low Frequency Filter: Eliminates low frequency distortion from a turntable or warped record.
14. Mute: Reduce the volume level by 20dB. Useful when changing records, tapes or changing sources.

Back Panel Description

1. Phono Inputs: Connect to Left/Right output from a turntable.
2. Aux Input 2: Auxiliary source input.
3. Aux Input 1: Auxiliary source input.
4. CD/DVD Input: Connect to Left/Right output from a CD or DVD player.
5. Tape Play: Connect to a tape decks output jacks.
6. Tape Rec: Connect to a tape decks input jacks.
7. Output: Used to connect to a signal processing unit, such as a graphic equalizer or can be connected to a power amplifier with higher output power.
8. Ground Screw: Connect the ground wire from a turntable here to avoid hum or feedback from the speakers.
9. AC Selector: Switch between 110V-220V AC.
10. Fuse Holder: Contains primary AC fuse If fuse blows replace only with the same amperage fuse.
11. AC Power Cord: Plug the AC cord into a nearby AC outlet or surge protector.

System Diagram

Specifications

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