Acoustic box live1.
Introduction 1.1 MESSAGE TO THE USERS 1.2 SUMMARY OF FEATURES Thank you from all of us at Vintage Revolution for purchasing the Acoustic Box preamp. We hope it will prove to be the best investment of your musical career. • Impressive sound quality • Independent parametric equalizer per channel Our objective in designing the Acoustic Box was simple: to eliminate compromise.
IMPORTANT SAFETY INSTRUCTIONS To reduce the risk of fire or electric shock, unplug the apparatus when there is high probability of lightning. bent, stretched or pinched by items placed upon or against them, paying particular attention to cords, plugs, convenience receptacles and the point where they exit from the apparatus. CAUTION: To reduce the risk of electric shock, do not remove cover or back. No user serviceable parts inside. Refer servicing to qualified service personnel. 7.
Working CE & RoHS with Compliance Presets - Warranty Before Getting Started 3.1 DECLARATION OF CONFORMITY 4.1 Acoustic box live The following items should be included in your Acoustic Box live package: • The Acoustic Box live preamp • Power cord Conforms to the following Product Specifications: Safety: EMC: EN 60065 / IEC 60065 EN 55103-1, EN 55103-2 4.
Working Power information with Presets Power chord: Connect only power chord supply with the Abox to this input. The other end of the chord must be connected to an earthed main socke Voltage selector: Select the AC voltage corresponding to your local AC power Fuse Holder: T 0,1 AH 250V. Always replace the fuse with the correct value 5 Rev. 2.0 - EN EU - fw 5.
Abox in detail 6 Channel 1 (CH1) The CH1 is a high input impedance channel designed for passive transducer (eg. piezo or magnetic pickup) and it can handle up to 0 dBu without distortion. Use a mono jack from the left side in proximity of the CH1 to connect to your pickup. If you are properly connected, your sound will be monitored via the CH1 lamp. 6.1 Parametric equalizer (CH1) The CH1 is equipped with a parametric equalizer designed to control the mids of your passive pickup.
Abox in details 7.3 8 Notch filter The mixed channel is the signal obtained by adding the processed channels CH1 and CH2 . Each individual channel contribution is set by the LEVEL control knob (see section 6.2 and 7.6) The programmable notch filter on channel 2 can be activated or deactivated using the switch placed on top of the notch frequency tuner. If you need to use the notch filter turn on this switch and tune the freauency with the corresponding knob (50Hz-250Hz) 7.
Abox in detail 8.4 9.2 Ground Lift This switch tackles the ground loop issue encountered when AMP and PA are simultaneously connected to the Abox. Using condenser/membrane mic and piezo This section contains some fine tuning tips for those who use condenser mic (DPA 4099, ATM350 , AKGC414, Neumann u87, etc..) or dynamic mic ( SHURE SM57, SM58, etc..) in combination with piezo pickup. If you exerience a Hum, set this switch to LIFT position.
Abox in details the LEVEL of CH2, you can have a great bottom end with low feedback. This of course works well if you are using the mic in combination with the piezo. Without the piezo you would miss completely the sound definition. Place the FREQ’s nob (CH2) to 100Hz and the corresponding MID knob to 15 o’ clock. Increase the LEVEL untill you have enough low end from the CH@@ CH2. Adjust your LOW -MIDS-HIGH form the tone control of the blended signal to improve the sound quality. 9.
Abox in detail 10 Technical specification Tone controls (mix of CH1 & CH2) Connections • Low: +/–12dB Shelf @ 40Hz Input: • Low: +/–12dB Bell@ 700Hz • CH1: JACK passive channel; 1/4” Dia. Standard Mono Jack • High: +/–12dB Shelf @ 3KHz • CH2: XLR balanced phantom power +48V; Output: Power IN • AMPOUT (Mix of CH1 & CH2): JACK unbalanced connection; maximum 9V RMS @ 470 Ohms; 1/4” Dia. Standard Mono Jack • 110V or 230V selectable.
