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acoustic reference amplifier

R e l e n t l e s s i n n o v a t i o n i n a c o u s t i c a m p l i f i c a t i o n

user’s guide

Содержание Acoustic Reference Amplifier

Страница 1: ...acoustic reference amplifier R e l e n t l e s s i n n o v a t i o n i n a c o u s t i c a m p l i f i c a t i o n user s guide ...

Страница 2: ...n of the speaker this amplifier will clearly reproduce the sound of your guitar so that everyone hears the same clear warm and delicious sound It also contains an all discrete professional studio quality preamp based on our award winning Para DI to present the best quality signal possible to the speaker We trust that you are going to enjoy and come to understand the full capability of this new amp...

Страница 3: ...nel 5 6 Back Panel 7 8 Power Modules 9 Tricks Tips and How To s 10 Setting the Gain 10 Getting the Most Out of Spring Reverb 10 Using the FX Loops 11 When How and Why to Use Phantom Power 11 How to Use a Footswitch 11 Daisy Chaining Amplifiers Linking More Than One Together 12 D I Output Features 12 Speaker Limiter 12 Power Amplifier 13 Acoustic Guitar Feedback and Mic Feedback 13 Specifications 1...

Страница 4: ...tion to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moistu...

Страница 5: ...s on the VU meter backlight should light up The amp may take a few seconds to come completely on 6 PLUG IN THE GUITAR Plug the cable into the guitar or instrument of choice and then into Ch1 7 ADJUST THE GAIN Strum the guitar to check level of the VU Meter as you turn the Gain control up clockwise Optimally the VU meter is set correctly when the needle peaks around 0dB 8 UN MUTE CH1 or Ch2 if you ...

Страница 6: ...igned to get rid of the old rubber strap amp handle and have the handle integrated into the overall design The other metal portions such as the steel grill and the aluminum back panel are durable features to protect the components inside At the heart of the amplifier is a patented Balanced Mode Radiator The BMR is a new type of loudspeaker that has its world debut in the Acoustic Reference Amplifi...

Страница 7: ...re the audio equivalent of microwave food Where op amps tend to add cloudiness and noise we have kept our preamp s signal path 100 discrete so that the sound you get out is the sound you put in or better Spring Reverb During the design of this project we were originally testing digital effects and planned on having them available on this amplifier The more we listened to the digital effects that w...

Страница 8: ...hen the needle peaks just at 0dB when playing at your loudest 5 Mute and indicator LED Each channel has a mute button that is much like a channel mute on a mixing desk When the button is in the signal will be muted When the button is out the signal will not be muted When muted the LED above the mute button will light Because it is a channel mute this function will not mute the speaker only the inc...

Страница 9: ... mid control The top knob controls the 12dB boost cut The bottom knob selects the frequency at which you boost or cut You can sweep from 1kHz full counter clockwise to 5kHz full clockwise The most common uses of this control will be to cut some midrange frequencies on nasal sounding guitars or to boost frequencies up in the 5k range to bring zing back to lifeless strings For help with setting the ...

Страница 10: ...ift switch such as this is sufficient Heed this warning WARNING Never use a 3 Prong to 2 Prong adapter on the power plug nor break off or disconnect the ground connection of a power plug in order to defeat a ground loop or for any other reason This is very dangerous and can lead to electric shock injury or death 4 Line Out The 1 4 line output has two distinct uses First you can use it as a standar...

Страница 11: ...anel mute controls or by the footswitch mute so that you can play background music while in between sets and have your instruments or microphones muted However there is a volume control for the aux channel located on the front panel in the bottom right corner to adjust the aux input level 12 Aux in RCA Parallel This dual RCA input is joined with the 1 4 aux input so you will generally want to use ...

Страница 12: ...re that the power plug is disconnected from the Power Input Module 2 With a small screwdriver coin or fingernail pry the fuse drawer out by using the small tab at the top of the fuse drawer which is just above the symbol of the fuse on the drawer 3 The drawer contains a slot for the working fuse the back exposed slot and a space for an extra fuse the front enclosed space 4 READ THE WARNING BELOW B...

Страница 13: ...us A difference between spring reverb and digital reverb is that spring reverb is a mechanical device that uses an actual suspended spring inside the amplifier to mimic the reverberation inside of a room When the reverb is turned on the electrical signal from a guitar pickup or microphone will cause the springs to vibrate thus creating the reverb effect However because the reverb is created by vib...

Страница 14: ...ys have the channel muted the gain turned down or the master volume off when activating or deactivating the phantom power button The phantom power on this amplifier is a dual use control It simultaneously turns on 48V power on the XLR input and 9V pull up power on the 1 4 input Each channel has its own phantom power switch The 48V phantom power on the XLR input can be used to power a condenser mic...

Страница 15: ...This includes muting gain reverb eq effects loops etc STEREO If you would like to run two amps in stereo you will have to use an effects device that takes a mono input and creates a stereo signal out of it Or you can use a standard mixer Run from left and right into either the inputs or aux in preferred and you have a very good stereo PA We have been very impressed with running these amplifiers in...

Страница 16: ...nd the construction of the guitar A larger bodied guitar will usually have a lower top resonance because of its size and will usually feed back lower than smaller guitars that often have slightly higher pitched fundamental resonance The typical top feedback frequency range is from 180 Hz 260 Hz The notch is designed to decrease the gain of the amplifier only at that specific frequency that is feed...

Страница 17: ... to 1kHz Hi Mid 12dB 2kHz sweepable from 1kHz to 5kHz Treble 12dB 10kHz EFFECTS LOOPS Send Level 5dBv 0 5Vrms Output Impedance 600 ohms Return Level 6dBv 2Vrms Maximum before clipping Input Impedance 20K ohms D I OUT Output level 8dBv 0 4Vrms Balanced Output impedance 600 ohms LINE OUT Output level 10dBv 0 3Vrms Output impedance 600 ohms TUNER OUT Output level 10dBv 0 3Vrms Output impedance 600 oh...

Страница 18: ...B LO C K D I A G R A M 15 ...

Страница 19: ...event shall LR Baggs be liable for property damage or injury resulting from failure of this product nor any loss of income satisfaction or damages arising from the loss of use of same due to defects or availability of same during service To Obtain Warranty Service 1 Contact the LR Baggs dealer where you purchased your amplifier to see if they are an authorized LR Baggs repair center If you cannot ...

Страница 20: ...483 N Frontage Rd Nipomo CA 93444 p 805 929 3545 f 805 929 2043 www lrbaggs com ...

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