USERS MANUAL GR ONE 300 GR ONE 700 GR ONE 1400 PURE SOUND
USER MANUAL PURPOSE This user manual is dedicated to the use of the bass amplifiers GR-ONE 700, GR-ONE700x2 and GR-ONE 300. The manual includes the following information: - General information (technical data and packaging); - Description of the amplifier’s functions. All the informations described on this user manual are verified.
PACKAGING AND STORAGE PACKAGING GR-ONE 700, GR-ONE700x2 and GR-ONE 300 are packed in a special cardboard box. The box contains the amplifier, power supply cable and the user manual. TRASPORT Please handle the box with care. A specific position during the transport is not required. STORAGE Please keep the amplifier in a dry and ventilated place. Ideal storage conditions: Temperature within -20C and 40C, Humidity 20% to 80%. PRODUCT DISPOSAL Please follow the disposal instruction issued by your local council.
MAIN FEATURES • 2 SPEAKON Indipendent audio output (GR-ONE 700x2), 1 SPEAKON audio output (GR-ONE 700 and GR-ONE 300) • XLR DI out • Headphone Output • Tuner Output • Send-Return • Aux-In • Output 9V, 250 mA • Gain control • Bass, Mid-Low, Mid-High and High equalization control • Mid-Low frequencies switch • Mid-High frequencies switch • Deep setting • Brigth setting • Pure setting • Mute setting • DI volume • Anti-bump on DI out • Headphone volume • Master Volume control (GR-ONE 300 and GR-ONE 700); • Mast
TECHNICAL FEATURES GR-ONE 300 • POWER RMS 300 W @ 4Ω • DYNAMIC RANGE: 113dBA • Parameters of nominal distortion output: a) TDH+N: - 0.005 % @ 1 W (4Ω, 1 kHz), 0.0008 % @ 50W (4Ω, 100 Hz) b) CCIF IM distortion = 0.0003 %, 10 W, 4Ω, 18.5 kHz / 1 kHz • Low output impedence: 6mW • Total Efficiency: 80 % @ 300 W, 4Ω TECHNICAL FEATURES GR-ONE 700 • POWER RMS 700 W @ 4Ω • DYNAMIC RANGE: 117dBA • Parameters of nominal distortion output: a) TDH+N: - 0.005 % @ 1 W (4Ω, 1 kHz), 0.
CONTROLS DESCRIPTION FRONT PANEL CONTROLS 1. INPUT JACK Input jack for you bass. We suggest to use a good quality cable, in order to obtain the best audio performance. 2. AUX-IN 3.5mm jack Auxiliar input to connect an external audio device 3. GAIN CONTROL KNOB Sets the input signal amount of the pre-amp 4. BASS KNOB Increases or reduces the bass frequencies of the signal 5. MID-LOW KNOB Increases or reduces the mid-low frequencies of the signal 6.
. HIGH KNOB Increases or reduces the high frequenciess of the signal 8. DEEP BUTTON Gives a more deep sound 9. BRIGHT BUTTON Gives a more bright sound 10. MID-LOW SWITCH Use this switch to change the frequency of the mid-low band from 185 Hz, 375 Hz and 800 Hz. 11. MID-HIGH SWITCH Use this switch to change the frequency of the mid-high band from 600 Hz, 1200 Hz and 18200 Hz. 12. PURE SWITCH Allows to bypass all the equalization filters of the preamplifier.
visualize the signal intensity, or as Chromatic tuner. The six central LEDs, labeled by the letters B E A D G C, are very important when the LEDs bar is used as chromatic tuner. In fact they identify six different musical notes. Each of these LEDs will light blue or red, depending on whether you are playing a tuned or untuned note.
REAR PANEL CONTROLS AC POWER SOCKET (230V - 115V) IEC plug for power supply connection . The power supply self-recognation feature allows to power the GR-ONE with a voltage of 230V or 115V. The supplied cable is equipped with a ground wire. For safety and security reasons, never unplug the ground wire from your equipments. POWER ON/OFF SWITCH Switch on and off the amplifier. 9 VDC Out 9V DC output to connect external equipment (we recommend to connect 4-5 pedal effect maximum).
SPEAKON OUTPUT It is possible to use a 6.35 mm jack. We recommend to use a 2 poles speakon connector. Never use a 6.35 jack guitar cable to connect your amplifier to your speakers. LIMITED WARRANTY The warranty covers a period of three years. The warranty covers any defects in material or workmanship under normal use during the warranty period. Any shipping cost to/from the repair service centre is the customer’s responsibility.
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via Conchia n.c. 70043 Monopoli (Ba) > tel.: 347 6322 657 info@grbass.com > www.grbass.com > P.
