User manual ART HEADAMP 6 PRO

[. . . ] If the provided plug does not fit into your outlet consult your service agent. Route the power cord so that it is not likely to be walked on, stretched or pinched by items placed upon or against. Grounding: Do not defeat the grounding and polarization means of the power cord plug. Do not remove or tamper with the ground connection on the power cord. [. . . ] Outputs include both front and rear panel stereo 1/4-inch TRS jacks for ease of installation and quick patching capability. Two MONO select buttons on each channel select between four operating modes; 1) Stereo, 2) Mono Left, 3) Mono Right, 4) Mono Both (Left & Right) for versatile monitoring solutions. Input options include XLR and 1/4-inch TRS balanced inputs with matching "Thru" jacks for bridging multiple HeadAmp 6 Pro units. An additional front panel stereo 1/4-inch TRS jack for quick patch override of the rear panel inputs is included for quick insertion of any stereo source. Eight-segment LED level indicators provide visual feedback of the signal level on all channels as well as the main signal bus. INSTALLATION The HeadAmp 6 Pro may be used in a wide variety of applications and environments. Its rack-mountable steel and aluminum enclosure is both attractive and designed for continuous professional use. However, for greater performance reliability we recommend that you not place the unit on top of power amps or other sources of extreme heat, or strong magnetic fields. AC Power Hookup The HeadAmp 6 Pro has an internal power supply. Only connect the unit to mains power of the type marked on the rear panel. The power source must provide a good ground connection, and the ground pin on the mains plug should never be defeated. Analog Audio Connections Audio connections to and from the HeadAmp 6 Pro are: Rear Balanced Inputs and Outputs: [XLR] [1/4-inch] Rear Stereo Aux 1/4-inch Inputs: Front Direct 1/4-inch Input: Front and Rear Stereo Headphone 1/4-inch Outputs: Pin 2 = Pos(+), Pin 3 = Neg (-), Pin 1 = Ground Tip = Pos (+), Ring = Neg (-), Sleeve = Ground Tip = Left, Ring = Right, Sleeve = Ground Tip = Left, Ring = Right, Sleeve = Ground Tip = Left, Ring = Right, Sleeve = Ground 5 CONTROLS and JACKS Front Panel FIGURE 1 - Master Input 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. Master Volume Control This control adjusts the level of the main signal bus. The audio level on the main signal bus is displayed by the eight-segment LED level meter located just to the left of the MASTER VOLUME control. Mono L and Mono R Switches These switches set the stereo headphone outputs to one of four operating modes. (This affects only the headphone outputs and occurs post (after) the mixing, level, and tone control sections. ) 1) Both Switches Out = Stereo 2) Mono L In & Mono R Out = Mono Left Channel Only 3) Mono R In & Mono L Out = Mono Right Channel Only 4) Mono L In & Mono R In = Mono Left & Right Channels Together Out Jack This stereo TRS 1/4-inch jack provides a connection for each of six output channels to stereo headphones or to additional headphone distribution amplifiers. A second identical output jack is provided on the rear panel for each channel as well. 6 Bass Control This control can be used to boost or cut the low frequencies in each respective channel. The bass response is flat when the control is set to the 12 o'clock position. Treble Control This control can be used to boost or cut the high frequencies in each respective channel. The treble response is flat when the control is set to the 12 o'clock position. Balance Control This control provides one of two functions depending on whether there is a plug inserted into the rear panel STEREO AUX INPUT for a particular channel. With no plug inserted into the rear panel jack, the control will vary the Left / Right balance of the main signal bus. With a plug inserted into the rear panel jack, the control changes function to vary the balance between the stereo signals coming from the main signal bus and the stereo signals coming from the rear panel STEREO AUX INPUT for that respective channel. (By feeding a return signal for only the vocal microphone of a particular musician they can use the BALANCE control as a `More Me" control by varying the mix between their microphone signal alone, and the main signal bus audio. If it is a problem simply lower the total count of headphones on a particular channel in order to raise to total load impedance as seen by the channel output. ) There is no direct relationship between headphone load impedance and SPL output. The relevant specification that determines acoustic output is the sensitivity spec of the headphone, i. e. how much SPL it will put out for a given level of input signal, usually rated at 1 mW. Sensitivity is determined by the overall design and construction of the transducer. [. . . ] The original packaging may not be suitable as a shipping carton, so consider putting the packaged unit in another box for shipping. Print the RA number clearly on the outside of the shipping box. 4) Include, with your unit, a note with the RA number and your contact information including a daytime phone number, preferably attached to the top of the unit. Fill in the following information for your reference: Date of purchase Purchased from Serial number ___________________ ___________________ ___________________ 13 HEADAMP 6 PRO SPECIFICATIONS Input Impedance Balanced Main Input XLR and 1/4-inch TRS Jacks. . . . . . . . . . . . . . . . . . . . 40K Ohm Balanced Direct In TRS Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. 9K Ohm Stereo Aux Input TRS Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21K to 15K Ohm CMRR @ 1KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]