Summit Audio 2BA-221, Operation Manual

Page 1: ...Summit Audio Model 2BA 221 Microphone Preamp and Line Module Summit Audio Inc P O Box 223306 Carmel CA 93922 831 728 1302 email sound summitaudio com Operation Manual ...

Page 2: ...a stackable input design multiple 2BA 221 s can be linked together to form a modular mixing device with individual outs inserts per channel and a final vacuum tube gain stage Its swept high pass filter multiple simultaneous tube and solid state outputs insert jack and internal power supply makes the 2BA 221 a powerful tracking and mixing tool Features Variable microphone impedance High quality mic...

Page 3: ...and it s power cord Save the carton and packing material for possible future use Before powering up the unit read this manual and observe the cau tions for HIGH VOLTAGE Important Warranty Information For your 3 year warranty register your 2BA 221 on line today at www summitaudio com ...

Page 4: ... input and the rear panel line input Use more of this control for a cleaner less vacuum tube sound Adjust this control along with the Tube Output gain to get the proper output level and to get the desired sound Signal LEDs Green Signal is present at the input Amber Proper input signal level Red Signal is at the threshold of Clipping Set the input gain controls so that the red LED only lights occas...

Page 5: ...this control along with the Tube Output gain to get the proper output level and to get the desired sound Mic Preamp Loading Control This knob controls the loading or impedance for the micro phone input The input can be set from 100 ohms to 10K ohms You can set this control to match the 2BA 221 to the impedance of your microphone or as a tone control Try sweeping the impedance control to hear the d...

Page 6: ...hantom power is present whenever the blue LED is illuminated Turn the unit off to bleed off the voltage Warning Some microphones cannot tolerate phantom power and may be damaged Check the microphone s specifi cations and requirements before using phantom power Highpass Filter Frequency Control This control adjusts the frequency of the highpass filter from 20Hz to 200Hz The highpass filter is used ...

Page 7: ...l recording and audio equipment 1 4 TRS Balanced Line Level Output This is a 10dB balanced 1 4 output designed to interface with your recording device compressor or EQ XLR Mic Level Input This is a balanced low level input designed for microphones The gain of this channel is adjusted using the front panel Mic Gain control and the 20 dB Pad switch 1 4 Line Level Input This is a 10K Ohm impedance ba...

Page 8: ...into the 2BA 221 just before the tube output stage and insert jack Signal Out Signal Return Tip Ring To Input of Processor To Output of Processor INSERT CABLE Signal is sent out on tip of plug and returned via ring of plug 2BA 221 When using the insert jack a cable wired like the one shown above should be used The diagram at right shows one way to connect two 2BA 221 units to create a 4 input summ...

Page 9: ...r Both outputs are balanced 3 Adjust the Mic and Line Hi Z Level Gain control so that the amber LED is lit most of the time and the red LED only lights occasionally 4 Adjust the Tube Output Level for an optimal signal level 5 Adjust the front panel Mic Impedance control to match your microphone If in doubt set the control for 10K ohms 6 That s it Tips Use the Line Hi Z gain control for solid state...

Page 10: ...th a direct box and a mic preamp This setup allows you to mix the sound of your guitar or bass amp with the direct sound of your instrument and sounds fantastic in both live or recording situations Mic on Amp Cabinet To Recording Device or Line Mixer Line Output Input Direct Out TD 100 2BA 221 Input Mic Input Amp Direct Channel ...

Page 11: ... instru ment input for the guitar using this same setup Connect the pickup output of your acoustic instrument to the High Z input and connect a high quality microphone to the Mic input Adjust the input gain controls for the best tonal balance between the microphone and pickup Pickup Instrument Input Mic Input Microphone on guitar or voice 10 BAL INSERT SUMMIT AUDIO INC CARMEL CA USA MIC FUSE 4 BAL...

Page 12: ...with the insert cable as shown below Adjust the input level on the 2BA 221 to get a proper signal level into the TLA 50 The tube output gain control on the 2BA 221 functions as a gain makeup control 10 BAL INSERT SUMMIT AUDIO INC CARMEL CA USA MIC FUSE 4 BAL SUMMITAUDIO COM MODEL 2BA 221 20W MAX OUTPUTS OUT IN IN STACK INPUTS 2BA 221 Output Input OUTPUTS CLASS A TUBE LEVELER MODEL TLA 50 SUMMIT AU...

Page 13: ...se the Solid State input gain for a cleaner sound To distort the 2BA 221 turn the Tube Output up to 2 3 o clock and adjust the solid state Hi Z input gain to get a good level Adjust the solid state and tube output controls to get the desired amount of distortion Use the 10dB balanced output if the XLR output has too much gain HI Z Input MIC LINE MODULE 10 0 20 ON OFF 20 Hz 200 Hz 10 10 10K 100 ON ...

Page 14: ...the solid state preamp before being summed together with the Hi Z input line level input and the stacking input The polarity switch can invert the signal if desired Mic Input Stack Input Stack Output Line Input rear Line Inst Gain Hi Z Input front Peak Meters Variable Mic Impedance ø Polarity 20 Pad Mic Preamp Insert In Out 1 4 Output XLR Output HP Filter In Out Summing Amp Filter Freq Output Leve...

Page 15: ... a compressor before the tube stage The highpass filter has a variable cutoff frequency 20Hz 200Hz This control is designed to remove low fre quency rumble caused by stage vibration and other factors which may be picked up by the microphone The 2BA 221 features a vacuum tube amplifier driving an electronically balanced output stage The balanced output drivers provide a low output impedance for dri...

Page 16: ...al Connections Input Balanced 3 pin XLR Pin 1 Ground Pin 2 Signal Pin 3 Signal Balanced 1 4 jack Sleeve Ground Tip Signal Ring Signal Output Balanced 1 4 jack Balanced 3 pin XLR Sleeve Ground Pin 1 Ground Tip Signal Pin 2 Signal Ring Signal Pin 3 Signal ...

Page 17: ... Supply 20 watts 115 volts 50 or 60 Hz Fuse size is 5 amp slo blo for 100 115 V Fuse size is 25 amp slo blo at 230 V Dimensions W 8 5 H 1 75 D 8 5 Two units fit side by side on a standard one space rack shelf Weight 7 pounds 3 15 kg Audio Specs For current audio specifications please contact Summit Audio at www summitaudio com ...

Page 18: ... 100 Audio Technica ATM29HE 200 AKG 414ULS 180 Audio Technica AT4060 200 Audio Technica ATM31a 200 270 AKG 414TLII 180 Audio Technica AE3300 150 Audio Technica ATM33a 200 270 AKG D40 500 Audio Technica AE4100 250 Audio Technica ATM41a 250 AKG D50 500 Audio Technica AE5400 150 Audio Technica ATM61 600 AKG D60 500 Audio Technica AE6100 250 Audio Technica ATM63 600 AKG D660 500 Audio Technica AT804 6...

Page 19: ... 150 Shure Beta 58A 150 DPA 4012 75 Neumann KMS105 20 Shure Beta 87A 150 DPA 4015 220 Neumann KM183 20 Stedman C15 250 DPA 4016 220 Neumann KM184 20 Stedman N90 250 DPA 4041SP 200 Neumann TLM170 20 Stedman SC3 250 Earthworks M30 600 Neumann TLM193 20 Stedman TR1 150 Earthworks M550 600 Röde NT1 40 Stedman LD23 150 Earthworks QTC1 600 Röde NT1000 100 Stedman LD50 150 Earthworks SR68 600 Röde NT2 40...

Page 20: ...Summit Audio Inc P O Box 223306 Carmel CA 93922 web page www summitaudio com email sound summitaudio com Please register on line today at www summitaudio com Thanks 2BA 221 Op Rev A ...