User manual NEVE 5012

[. . . ] Sugar crystals act like little rectifiers and can produce noise, "crackles" etc. SWITCH OFF IMMEDIATELY because once current starts to flow the mixture hardens, can get very hot (burnt toffee!) and cause permanent and costly damage. Please contact support as soon as possible at support@rupertneve. com for resolution. If it gets wet and you suspect that good clean water may have got in, Immediately unplug the unit, and remove it from the source of water. [. . . ] If it is desired, nevertheless, to present a lower input impedance to the microphone, we suggest that an XLRF and XLRM assembly be made up with the desired resistor value connected between pins 2 and 3. (If there is sufficient demand we may be offering this as a catalog item later) 3 5012 DUO MIC PRE High Pass Filter The High pass filter is a valuable aid in any signal chain but particularly so in a microphone preamplifier. Signals between 20 and 250 Hz can be attenuated, leaving the range above this unaffected. Meter An eight segment LED bar-graph meter is fitted for each channel, calibrated in dBu as follows: - 30 dBu, - 18dBu, - 12dBu, -6dBu, + 4 dBu, + 10dBu, + 16dBu, + 22dBu With reference to the balanced output signal level. The input level can be determined by reading the Meter indication, then subtracting the Gain settings of the Sensitivity switch and the Trim control. For example, if the meter is reading + 10 dBu, with the Trim control at, say, +2 and the main Gain switch is at 42, the level of the input signal is 10 - 42 - 2 = -34 dBu. Main Output The main output signal comes from the output transformer secondary which is balanced and ground free. A ground free connection guarantees freedom from hum and radio frequency interference when connected to a balanced destination such as the input to another Portico module or one of the many high quality vintage modules still in current use. However the transformer may be used with one leg grounded without any change in performance. It is not necessary to "ground" one leg at the Portico output. It would normally get a ground connection when fed to equipment that is not balanced. Maximum output level is + 25 dBu, which provides a large margin over and above the likely maximum requirement of any destination equipment to which the 5012 is connected. Buss Output The To Buss output is unbalanced and has a high impedance output. A TRS patch cord is used to connect the 5012 Buss output to one of these bussing modules. The Monitor connection is derived pre mute on the 5012 and will produce a signal at the output of the buss modules that is equal in level to that at the 5012 output. Silk Much could be written about this feature, suffice to say, that it gives a subtle option to enhance sound quality in the direction of vintage modules. The Silk button reduces negative feedback and adjusts the frequency spectrum to provide a very sweet and musical performance. We suggest you try it and make your own judgment. 4 5012 DUO MIC PRE SPECIFYING THE NOISE PERFORMANCE OF THE RND 5012 Noise: is specified in 3 ways: With Gain at Unity Better than ­100 dBu With Gain at 66 dB Better than ­62 dBu Equivalent Input Noise Better than ­128 dBu Decibels are used to express relationships and to make comparisons. One could state that amplifier "a" has 3 dB less noise than amplifier "b" but unless you have a point of reference for one of the two amplifiers, you would not know how good they were by comparison with other amplifiers. "a" and "b" might both be pretty bad amplifiers but you would only know that "a" was less bad than "b" by 3 dB (dBu is derived from the original telephone standard, dBm indicating 1 mW of power in a 600 ohm circuit. The term dBu indicates the same 0. 775 Volts RMS as a voltage level, not a power level. ) There are several types of electrical Noise but here we are mainly concerned with Noise from the devices used in amplifiers plus Noise from circuit resistance that is heard, ideally at an extremely low level, as a "hiss" accompanying the music signal. Thermal or Johnson noise results from the Brownian motion of ionized molecules within a resistance. [. . . ] With gain at unity better than ­100 dBu With gain at 66 dB better than ­62 dBu Equivalent Input Noise better than ­128 dBu Noise Factor 1. 5dB High Pass Filters: Continuously variable swept frequency from 20 Hz to 250 Hz. Slope: 12 dB/Octave Gain: Unity to +66dB in 6 dB steps, Trim continuously adjustable from ­6dB to +6dB Buss Output: Output is designed to feed the 5014 Monitor Buss-mix Amplifier at the internal system level of -2. 5 dBu. Output level of the 5014 is equal to that of the 5012. Maximum Output Level: Maximum output from 20 Hz to 40 kHz is +25 dBu. Mute: Mutes Main Output only. Total Harmonic Distortion and Noise: @ 1kHz, +20 dBu output: Main Output: Better than 0. 001% Buss Output measured at the 5014 Monitor Buss-mix Amplifier Output: Better than 0. 002% @ 20Hz, +20 dBu output: Main Output: Better than 0. 002% Silk Engaged: Better than 0. 2% Second harmonic Crosstalk: Measured channel to channel: Better than ­90 dB @ 15kHz. Phantom Power: +48 Volts DC +/- 1% Power requirements: Voltage range: 9 to 18 Volts DC Current consumption: @ 9VDC Current is 1. 3 A typical: @ 12VDC Current is 1. 0 A typical: @ 15VDC Current is 800 mA typical: @ 18VDC Current is 650 mA typical: Power Power Power Power = = = = 11. 7W 12. 0 watts 12. 0 watts 11. 7 watts 8 BLOCK DIAGRAM MIC IN GAIN 0-66dB INPUT TRANSFORMER PHASE REVERSE TRIM +/-6dB HIGH PASS FILTER 12dB / Oct. OUTPUT TRANSFORMER MUTE MIC OUT 9 SILK See Page 4 TO BUSS METER BUSS OUT PRODUCT WARRANTY Rupert Neve Designs warrants this product to be free from defects in materials and workmanship for a period of one (1) year from date of purchase, and agrees to remedy any defect identified within such one year period by, at our option, repairing or replacing the product. LIMITATIONS AND EXCLUSIONS This warranty, and any other express or implied warranty, does not apply to any product which has been improperly installed, subjected to usage for which the product was not designed, misused or abused, damaged during shipping, damaged by any dry cell battery, or which has been altered or modified in any way. [. . . ]