ULTRACOUSTIC ACX450/ACX900/ACX1800 Users Manual Version 1.
ULTRACOUSTIC ACX450/ACX900/ACX1800 IMPORTANT SAFETY PRECAUTIONS DETAILED SAFETY INSTRUCTIONS: 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. CAUTION: WARNING: To reduce the risk of electric shock, do not remove the top cover (or the rear section). No user serviceable parts inside; refer servicing to qualified personnel. To reduce the risk of fire or electric shock, do not expose this appliance to rain and moisture.
ULTRACOUSTIC ACX450/ACX900/ACX1800 FOREWORD Dear Customer, Welcome to the team of BEHRINGER users, and thank you very much for expressing your confidence in us by purchasing the BEHRINGER ULTRACOUSTIC.
ULTRACOUSTIC ACX450/ACX900/ACX1800 1. INTRODUCTION Thank you for choosing the ULTRACOUSTIC amplifier. You have purchased a modern 2-channel amplifier that guarantees excellent sound quality for various applications yet is easy to operate. The ULTRACOUSTIC comes with a wide range of features such as two integrated, 24-bit multi-effect processors or the FBQ Feedback Detection system which help you to fine-tune your sound.
ULTRACOUSTIC ACX450/ACX900/ACX1800 The MIC jack is the balanced XLR microphone input of the microphone/line channel. The balanced LINE jack (1/4") of the microphone/line channel can be used for line-level signals, e.g. from keyboards, drum computers, etc. The PHASE switch reverses the phase of the mix signal by 180° (only in ACX1800). Use this switch to eliminate problems with feedback. The COMPRESSOR controller is used to adjust the intensity of the compression (only in ACX1800, see chapter 4.3).
ULTRACOUSTIC ACX450/ACX900/ACX1800 2.2 Rear panel 6 2.
ULTRACOUSTIC ACX450/ACX900/ACX1800 3.2 Extended connecting options (ACX900 and ACX1800) 3. APPLICATIONS 3.1 Connecting options for the ACX450 Fig. 3.1: Cabling options of the ACX450 The above cabling is suitable for sessions in the rehearsal room or for practicing at home. Connect your guitar to the instrument input jack of channel 1. If desired, connect another instrument or a dynamic microphone to channel 2. Connect the supplied FS112 foot switch to the foot switch input at the rear panel.
ULTRACOUSTIC ACX450/ACX900/ACX1800 4. SOUND PROCESSING The ULTRACOUSTIC offers many options for sound processing. The ACX1800 includes, for example, an FBQ equalizer, a multieffects unit and a compressor. The various processing options are explained in this chapter. 4.1 FBQ equalizer A graphic equalizer with FBQ spectrum analyzer is available for sound adjustment and correction. If the sliding controllers are in neutral position (0), the signal is not modified.
ULTRACOUSTIC ACX450/ACX900/ACX1800 4.3 Compressor (only in ACX1800) 5. INSTALLATION The compressor reduces the dynamic range of a signal. Volume peaks are lowered, and low signals are boosted, so that the difference between the loudest and the lowest tone of an instrument or voice is reduced. This results in a more expressive and homogeneous sound, and the sustain of long tones is prolonged. ).
ULTRACOUSTIC ACX450/ACX900/ACX1800 6. SPECIFICATIONS $8',2 ,13876 $&; $&; ¼" TS unbalanced INSTRUMENT IN Input Impedance 10 MOhm XLR balanced MIC IN 4 kOhm Input Impedance ¼" TRS balanced LINE IN 40 kOhm Input Impedance INST INSERT RETURN Input Impedance MIC INSERT RETURN Input Impedance $&; ¼" TS unbalanced - 220 kOhm - ¼" TS unbalanced 220 kOhm RCA CD input Input Impedance >10 kOhm $8',2 2873876 LINE OUT Output Impedance - XLR balanced - 4.3 kOhm Max.
ULTRACOUSTIC ACX450/ACX900/ACX1800 7. WARRANTY § 1 OTHER WARRANTY RIGHTS AND NATIONAL LAW 1. This warranty does not exclude or limit the buyers statutory rights provided by national law, in particular, any such rights against the seller that arise from a legally effective purchase contract. § 2 ONLINE REGISTRATION the product was originally developed and manufactured, this modification/adaptation shall not be considered a defect in materials or workmanship.
