{"product_id":"gr-bass-groove-800-groove-1200-tube-bass-amplifier-heads","title":"GR Bass Groove 800 \/ Groove 1200 Tube Bass Amplifier Heads","description":"\u003ch2\u003eGR Bass Groove 800 \/ Groove 1200 Tube Bass Amplifier Heads\u003c\/h2\u003e\n\n\u003cp\u003eThe GR Bass Groove 800 \/ Groove 1200 Tube Bass Amplifier Heads combine a two-tube 12AX7 preamp with lightweight high-output bass amplification. Choose the Groove 800 for 800W RMS at 4 ohms or the Groove 1200 for 1200W RMS at 4 ohms, giving working bassists two power levels on the same Groove platform.\u003c\/p\u003e\n\n\u003cp\u003eBoth versions provide a four-band equalizer with switchable mid frequencies, plus Deep, Bright, Tone, and Pure functions for shaping different instruments, cabinets, and rooms. The Drive control adjusts distortion generated by the tube stage, while Pure bypasses the preamp equalization filters for a flat EQ path. A front auxiliary input, headphone monitoring, effects loop, and balanced DI support rehearsal, stage, and recording workflows.\u003c\/p\u003e\n\n\u003cp\u003eThe shared chassis also includes two combination speaker outputs with a 2.7-ohm minimum load, a rear XLR auxiliary input dedicated to headphone monitoring, footswitch control for Mute and Drive, and a 24-LED VU meter. Selectable Live and Studio fan behavior accommodates stage use and quieter recording environments, while automatic 115V\/230V mains recognition simplifies operation across compatible power systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Power Variants:\u003c\/strong\u003e Choose 800W RMS or 1200W RMS output at 4 ohms on the shared Groove amplifier platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 12AX7 Tube Preamp:\u003c\/strong\u003e Two vacuum tubes provide an adjustable Drive stage for adding tube-generated harmonic character.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Band EQ:\u003c\/strong\u003e Low, Mid-Low, Mid-High, and High controls provide detailed tone shaping for different bass rigs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Mid Frequencies:\u003c\/strong\u003e Mid-Low switches between 220Hz and 620Hz, while Mid-High switches between 720Hz and 1750Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure EQ Bypass:\u003c\/strong\u003e Bypasses the preamp equalization filters when a flat EQ path is preferred.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional DI Routing:\u003c\/strong\u003e Balanced XLR direct output includes independent level, pre\/post EQ selection, ground lift, and anti-bump circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Monitoring:\u003c\/strong\u003e Separate headphone level, front Aux-In, and rear XLR Aux-In support personal monitoring and playback sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLive and Studio Cooling:\u003c\/strong\u003e Selectable fan modes accommodate performance use or quieter studio operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003ch4\u003eVariant Options\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove 800:\u003c\/strong\u003e 800W RMS at 4 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove 1200:\u003c\/strong\u003e 1200W RMS at 4 ohms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eShared Amplifier Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Bass Amplifier Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreamp:\u003c\/strong\u003e 2 x 12AX7 tubes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Speaker Load:\u003c\/strong\u003e 2.7 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEqualizer:\u003c\/strong\u003e 4-band\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEQ Controls:\u003c\/strong\u003e Low, Mid-Low, Mid-High, High\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid-Low Frequencies:\u003c\/strong\u003e 220Hz \/ 620Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid-High Frequencies:\u003c\/strong\u003e 720Hz \/ 1750Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTone Filter:\u003c\/strong\u003e Mid-scoop EQ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Filter:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBright Filter:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure Function:\u003c\/strong\u003e Bypasses preamp equalization filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Adjustable tube distortion control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e Input gain control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaster:\u003c\/strong\u003e Master output level control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMute:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVU Meter:\u003c\/strong\u003e 24-LED meter with multiple display modes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Modes:\u003c\/strong\u003e Live and Studio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black with brushed aluminum front panel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInputs and Outputs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument Input:\u003c\/strong\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront Auxiliary Input:\u003c\/strong\u003e 3.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Auxiliary Input:\u003c\/strong\u003e XLR, routed to headphone output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e 3.5 mm with independent level control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDI Output:\u003c\/strong\u003e Balanced XLR with anti-bump circuitry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDI Level:\u003c\/strong\u003e Independent control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDI Routing:\u003c\/strong\u003e Pre\/Post EQ selectable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Lift:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffects Send:\u003c\/strong\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffects Return:\u003c\/strong\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 2 x combination speaker outputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker Connector Support:\u003c\/strong\u003e 2-pole Speakon or 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFootswitch Input:\u003c\/strong\u003e Mute and Drive control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessory Power Output:\u003c\/strong\u003e 9V DC, center-negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Input:\u003c\/strong\u003e 115V \/ 230V automatic recognition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eGroove 800 Performance\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Output:\u003c\/strong\u003e 800W RMS at 4 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 117 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.005% at 1W into 4 ohms at 1kHz; 0.0008% at 50W into 4 ohms at 100Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 6 mOhm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Efficiency:\u003c\/strong\u003e 84% at 800W into 4 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 13.4\" W x 10.2\" D x 2.8\" H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 7.5 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eGroove 1200 Performance\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Output:\u003c\/strong\u003e 1200W RMS at 4 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 123 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.003% at 50W into 4 ohms at 1kHz; less than 0.002% at 100W into 4 ohms at 100Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 6 mOhm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Efficiency:\u003c\/strong\u003e 80% at 1200W into 4 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 13.4\" W x 10.2\" D x 2.8\" H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 7.9 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's In the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGR Bass Groove 800 or Groove 1200 Bass Amplifier Head\u003c\/li\u003e\n\u003cli\u003ePower Supply Cable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GR Audio","offers":[{"title":"800 Watt","offer_id":46746501480645,"sku":"GRAUD-GROOVE800","price":1329.0,"currency_code":"USD","in_stock":true},{"title":"1200 Watt","offer_id":46746501513413,"sku":"GRAUD-GROOVE1200","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/3085\/3829\/files\/1-gr-audio-groove-800_4b9a10be-98c9-441b-9434-d39f1942743e.jpg?v=1786980470","url":"https:\/\/avlgear.com\/products\/gr-bass-groove-800-groove-1200-tube-bass-amplifier-heads","provider":"AVLGEAR","version":"1.0","type":"link"}