Manuale d’uso / di manutenzione del prodotto TubePre del fabbricante Presonus Audio electronic
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TubePRE Single-Channel Tube Mic-Preamplifier w/ VU Meter User's Manual VERSION 1.0.
i Presonus Limited Warranty Presonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser.
ii Limited Warranty Outside of The U.S. Presonus Audio Electronics products are warranted only in the country where purchased, through the authorized Presonus distributor in that country, against defects in material and workmanship.
iii Table of Contents 1.1 Introduction ........................................................................ 1 1.2 Features ......................................................................................... 2 2.1 Controls & Connections .
1 1.1 INTRODUCTION Thank you for purchasing the Presonus TubePRE Single-Channel Microphone/Instrument Tube Preamplifier. This pre-amp was designed using state of the art components to deliver crystal clear audio for an infinite period of time. We feel that we have created a reliable, versatile and affordable piece of audio equipment.
2 1.2 Features The following is a summary of your TubePRE's features: Dual-Servo Gain Stage Your TubePRE contains a dual-servo gain stage (no capacitors). This provides ultra-low noise performance and wide dynamic control. This gives the TubePRE the ability to boost the desirable signal without increasing unwanted background noise.
3 80Hz Rumble Filter A rumble filter is available to eliminate low frequency noise. This lets you greatly reduce background noise from things such as air conditioners or wind noise with the flick of a switch without affecting the desired frequencies.
4 2.1 CONTROLS & CONNECTIONS 2.2 Front Panel The TubePRE front panel has the following features: Phantom Power Switch (+48v) Phase Reverse Switch Drive Control (0 to 20dB) - 20db Pad Gain Control (0 to 40dB) 80Hz filter Backlit VU meter 2.3 Preamplifier Section Phantom power is available for the input of the TubePRE.
5 XLR wiring for phantom power PIN 1 GND PIN 2 +48v PIN 3 +48v Phase Reverse Switch Allows the user to invert the polarity of the XLR connector by switching pins two and three. The inversion of the pins of the XLR connector may be necessary to alter the audio phase of two like microphones to compensate for phase cancellation.
6 infinitely richer and sweeter. An overdriven signal can be achieved by significantly raising the level of the drive control. This overdriven tube effect is extremely useful in providing distorted guitar and for creating that authentic “blues harp” vibe (harmonica).
7 1/4” phone plug wiring input and output TIP High (+) SLEEVE GND (-) The output 1/4” phone plug is unbalanced.
8 3.1 OPERATION 3.2 Dynamic Microphones Lower output levels characterize dynamic microphones, so more gain is needed to achieve sufficient operating levels. Occasionally it is necessary to add the -20dB pad to the microphone to avoid distortion (e.g. when recording percussion).
9 how hard the tube is driven when in use. Signs of wear may be exhibited by poor performance or by the tube becoming “microphonic”. Periodic replacement of the vacuum tube is recommended. The time between the suggested replacements varies greatly with use.
10 With a compressor/EQ/dynamics processor When running the Tube Pre in conjunction with other processors it is recommended that the TubePRE be the first unit in the chain. The other units should be connected to the output (either XLR or 1/4”) of the TubePRE.
11 If the voltage on the back of my TubePRE does not match the voltage listed on the power supply what do I do? The voltage on the TubePRE’s external power supply may change. If the power supply came factory sealed with the unit, then it is the right power supply.
12 Can I plug my keyboard/CD player/etc into the TubePRE? It is not recommended that any LINE LEVEL items be plugged into the TubePRE. This scenario will not cause damage to the unit. However, it may cause the signal to distort or sound unpleasant. The reason is that the signal being fed into the unit is too loud for the TubePRE.
13 9.1 TECHNICIAL SPECIFICATIONS Preamp Bandwidth ..................................................... 10Hz to 50kHz Number of Channels ................................................................. One Performance THD + Noise (Unweighted) .......
14 Metering VU Meter .............................................................. -20dBu to +3dBu Clip LED ............................................................................ +20dBu Power Supply Type ........................................
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Presonus Audio electronic TubePre è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Presonus Audio electronic TubePre - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Presonus Audio electronic TubePre imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Presonus Audio electronic TubePre ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Presonus Audio electronic TubePre, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Presonus Audio electronic TubePre.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Presonus Audio electronic TubePre. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Presonus Audio electronic TubePre insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
