NIIMBUS ULTIMATE Series User Manual
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22Menu 4 – Altering the address of the remote controlPushing long ( > 2 seconds) the "PHONES OUT" button will force the correspondingwhite LED to flash.The current state is indicated binary by the INPUT SELECT LEDs.By pushing the "LINE OUT" button the setting may be altered.The procedure is finished by pushing again the "3 - RCA" button for two seconds,the white LED will stop flashing.1 - XLR off 2 - RCA off 3 – RCA off Address 0, remote functions switched off1 - XLR on 2 - RCA off 3 – RCA off Address 1, NiiMBUS remote "Headphone Amp“ DEFAULT !!1 - XLR off 2 - RCA on 3 – RCA off Address 2, reserved1 - XLR on 2 - RCA on 3 – RCA off Addrese 3, reserved1 - XLR off 2 - RCA off 3 – RCA on Address 4, reserved1 - XLR on 2 - RCA off 3 – RCA on Address 5, “One-For-All“ remote for headphone amps (Code 137)1 - XLR off 2 - RCA on 3 – RCA on Address 6, “One-For-All“ remote for D/A converters1 - XLR on 2 - RCA on 3 – RCA on Address 7, all addressesyellow indication means LED on / default setting is address 1 .Things to know …Why makes it sense to make such huge efforts ?A headphone amplifier is a device designed to condition audio signals with regard to the very specificrequirements of headphones. This doesn't sound too spectacular at the first glance and can be achievedrelatively easily. As with many things however, the devil is in the details and much more effort is requiredto design one amplifier for all current headphone models.Headphones per se are quite diverse, and there are two essential parameters: impedance and sensitivity.In general, headphones with higher impedance can be regarded as less sensitive than headphones withlow impedance (which is not generally true, but in the majority of cases). The sensitivity of headphones isusually stated in dB (sound pressure level) per Milliwatt.Extremes in this sense are the AKG K1000 with 74dB/mW on the one hand, and the Sennheiser HD25with108 dB/mW on the other hand: The K1000 requires 2500 times the power to achieve the samesound pressure as the HD25.There is also the fact that headphones with high impedance usually require much higher voltage toachieve high loudness. Thus the amplifier must be designed with high internal supply voltages. |
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