Instruction/ maintenance manual of the product 101 Grace
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model model 101 101 MICROPHONE PRE AMPLIFIER OWNERS MANUAL PO Box 204 Boulder, CO. 80306 voice: 303.443.7454 fax: 303.444.4634 email: info@gracedesign.
1 Thank you for purchasing the Model 101 microphone preamplifier. It is designed to be extremely reliable and easy to use . However, we ask that you take the time to familiarize yourself with some of the more important operation instructions in this manual to avoid most common user problems.
2 MODEL 101 FE ATURES • Fully balanced transformerless mic input and high impedance instrument input • Balanced XLR and 1/4" TRS outputs • Ultra clean 48 Volt phantom power • 11 position .
3 FRONT PA NEL CONTROLS GAIN CONTROL Each gain control has 11 positions and adjusts the voltage gain on the microphone input from 10dB to 60dB in 5dB steps.
4 CONNECTING THE PRE AMPLIFIER AUDIO CONNECTIONS l Microphone input connections are made using the female XLR connector on the rear panel. This connector is wired with pin 2 positive, pin 3 negative and pin 1 ground . 48V phantom power, if used, is supplied on pins 2 and 3.
5 Cable Termination Diagrams 1 2 3 SHI ELD HOT GN D (OPE N) Figure 1 . XLR UNB ALANCED OUTPUT CABLE TERMINATION SHI ELD HOT GN D R IN G I S O PE N TIP R ING SLE E VE PRE AM P E ND Figure 2. TRS UNB ALANCED OUTPUT CABLE TERMINATION POWER SUPPLY CONNECTIONS A 2.
6 OPER ATION SETTING THE GAIN l Turn the gain control fully counter-clockwise, turn the trim control fully clockwise and check that the +48V phantom power is off. l Connect the microphone to the preamplifier and then turn on the phantom power switch on if required.
7 Model 101 S pecifications GAIN RANGE Mic input 5dB steps 10-60dB Mic input 5dB steps High gain version 20-70dB Hi-Z input 5dB steps -10-40dB Hi-Z input 5dB steps High gain ver z sion 0-50dB Output trim attenuator 0 to -10dB THD+N @20dB Gain +20dBu out <0.
8 20 75Hz HIGH PASS F IL TE R R ES PONSE d B u +1 0 - 1 - 2 - 3 50 100 200 500 1k 2k 5k 10k 20k d e g PHASE vs FREQUENCY +40 +30 +20 +10 0 - 10 - 40 - 20 - 30 20 50 100 200 1k 500 10k 2k 5k 20k Hz Phase response @10 dB gain.
An important point after buying a device Grace 101 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Grace 101 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Grace 101 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Grace 101 you will learn all the available features of the product, as well as information on its operation. The information that you get Grace 101 will certainly help you make a decision on the purchase.
If you already are a holder of Grace 101, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Grace 101.
However, one of the most important roles played by the user manual is to help in solving problems with Grace 101. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Grace 101 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
