HeadAmp6 PROFESSIONAL SIX CHANNEL HEADPHONE AMPLIFIER OPERATION MANUAL 1
IMPORTANT SAFETY INSTRUCTIONS – READ FIRST This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure. Voltage that may be sufficient to constitute a risk of shock. This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read manual. Read Instructions: Retain these safety and operating instructions for future reference.
The ART HeadAmp6 Professional Six Channel Headphone Amplifier IMPORTANT SAFETY INSTRUCTIONS – READ FIRST ...............................................1 INTRODUCTION..........................................................................................................4 INSTALLATION...........................................................................................................4 AC Power Hookup ....................................................................................................
INTRODUCTION The HeadAmp6 is a full-featured six -channel stereo headphone amplifier that includes six auxiliary inputs to allow separate mixes on each headphone channel. Each output channel also features a dual function Balance control which will pan between Left & Right sides of the main signal bus, or vary the Mix between the main signal bus and the Auxiliary input for that respective channel.
CONTROLS and JACKS Front Panel FIGURE 1 - Master Volume, Direct In, and Channel One Direct In Jack The 1/4-inch TRS (Tip, Ring, Sleeve) jack on the front panel provides a stereo unbalanced input which, when used, will override the rear panel balanced inputs. This input is useful for when you want to temporarily insert a different main input signal from what is connected to the rear inputs, or simply make an unbalanced TRS style connection to another headphone output source.
Balance Control This control provides one of two functions depending on whether there is a plug inserted into the stereo AUX IN for a particular channel. With no plug inserted into the AUX IN jack, the control will vary the Left / Right balance of the main signal bus feed to the channel. With a plug inserted, the control changes function to vary the mix between the stereo signals coming from the main signal bus and the stereo signals coming from the AUX IN for that respective channel.
FIGURE 3 - Rear Panel Headphone Outputs Stereo Headphone Outputs These stereo TRS jacks are the main outputs for each channel of the headphone amplifier. They are wired in parallel with the corresponding output jacks on the front panel. Either front panel, rear panel, or both front and rear panel outputs can be used simultaneously to drive headphones or they can be used as feeds to additional headphone amplifiers in a distributed audio network.
OPERATION Start with the MASTER VOLUME and LEVEL controls on all channels set fully counter-clockwise. Set the BALANCE controls to their 12 o’clock positions. Set all MUTE and MONO switches to their “OUT” position. Using the appropriate balanced or unbalanced cables, (unbalanced cables will work in the rear panel inputs as well, but with the remote possibility of increased noise), connect the rear panel BALANCED MAIN Inputs to the audio monitor signal source to be distributed to the headphones.
APPLICATIONS FIGURE 4 - Headphone Distribution Application 9
FIGURE 5 – Block Diagram 10
WARRANTY INFORMATION Limited Warranty: Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology, (A R T) warrants to the original purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period of three years from the date of purchase.
HEADAMP6 SPECIFICATIONS Input Connections: Output Connections: Input Impedance: Output Impedance: Maximum Input Level: Maximum Output Level: Maximum Gain: Signal to Noise Ratio: THD: Dynamic Range: CMRR: Phase Shift: Power Requirements: Dimensions: (HxWxD inch) Dimensions: (HxWxD mm) Weight: XLR-F balanced (2), ¼-inch balanced (9) XLR-M balanced (2), ¼-inch balanced (2), ¼-inch stereo headphone (18) 40K Ohms Main, 10K Ohms Direct, 15K Ohms Aux In <12 Ohms Headphones +21dBu (all inputs) 150mW (600 Ohm He
