User manual SUMMIT FEQ-50

[. . . ] HIGH VOLTAGE IMPORTANT: Check the bottom sticker to make sure the FeQ-50 is manufacture for the voltage used in your country. Each of the four bands has six switch selectable frequencies and 14dB of fully sweepable cut or boost. The low and high bands can switch between peaking and shelving filters, the low mid and high mid can switch between narrow and wide bandwidths. [. . . ] Select 8. 2 10 12. 5 7. 2 18 0 Boost/Cut -14 +14 5 Peak/Shelf kHz Bandwidth Control On the two mid-bands, the bandwidth control sets the Q or width of the bell-shaped response curve. The bandwidth circuit employs a "proportional Q" design, which results in a wider bandwidth at low boost/cut settings and a narrow bandwidth at high boost/cut settings. Peak or Shelving Response The Low and High EQ bands can be set for either peak or shelving response. In shelf mode, for example, the High band continues to boost or cut frequencies above the center frequency. In peak mode the High band creates a bell-shaped response curve. Model FeQ-50 4-Band Passive, Parametric Equalizer 5 Front Panel High Pass Filter To reduce rumble or sub-audio frequencies, you have the option to enable this virtually transparent highpass filter. The frequency is fixed at 30Hz with a gentle 6dB/octave relief. Bypass Switch This switch bypasses all the passive EQ sections, but NOT the tube output stage which allows you to use the FeQ as a tube enhancement device to add warmth and natural sound to your digital recordings even when you don't need the EQ. The FeQ-50 can also be used to convert -10dB (consumer) level signals into +4dB (professional) level. Important - Please Read! The FeQ-50 contains a vacuum tube which generates heat. Do not block the cooling holes on the top of the FeQ-50 and always allow adequate ventilation when mounting the unit in a rack enclosure. 6 Summit Audio, Inc. Rear Panel Rear Panel MODEL FEQ-50 20W MAX 115V USE 250-MA FUSE 220V USE 125MA FUSE TUBE SOLID STATE PUSH FUSE SUMMITAUDIO. COM +4 BAL. -10 BAL. +4 BAL. -10 BAL. +4 BAL. Receptacle The FeQ-50 is factory wired for either 100, 115 or 230 Volts AC. Before connecting AC power make sure the FeQ is wired for the voltage used in your country. XLR Line Level / 1/4" Line Level Input The Neutrik combination jack accepts either a balanced XLR or balanced 1/4" phone plug. The 1/4" input is designed to accept -10dB input levels only. XLR Balanced Tube Output This is a +4 dB balanced, low impedance XLR output connection compatible with professional recording and audio equipment. The tube output provides a warm, natural tube sound. Note: You can use all four tube and solid state outputs at the same time for added versatility. Model FeQ-50 4-Band Passive, Parametric Equalizer 7 Basic Operation 1/4" TRS Balanced Tube Output This is a -10dB, balanced 1/4" output designed to interface with your recording device, compressor or EQ. XLR Balanced Solid State Output This is a +4dB, balanced, low impedance output connection compatible with professional recording and audio equipment. The Solid-State output provides a clean, low-noise signal. 1/4" TRS Balanced Solid State Output This is a -10dB, balanced 1/4" output designed to interface with your recording device, compressor or EQ. Basic Operation Important: For proper operation of the FeQ-50 (or any vacuum tube device for that matter), allow the unit to warm up with power on for 15 minutes before use. Setting up a Parametric EQ 1. Adjust the Center Frequency to "zero-in" on the frequencies you wish to boost or cut. Now that you've found the frequency you want, set the Gain to a more conservative value. Adjust the other bands as needed. Important: Do not block the cooling holes and allow adequate ventilation. 6. 8 Summit Audio, Inc. Applications Applications Dual-Output Mic/EQ Channel The FeQ-50 in conjunction with the Summit Audio 2BA-221 provides you with a world-class mic preamp and passive EQ channel. As a bonus, you can record both the tube and solidstate outputs of the FeQ-50 on separate tracks. Microphone Channel To Recording Device or Line Mixer Tube Out FeQ-50 MODEL FEQ-50 20W MAX 115V USE 250-MA FUSE 220V USE 125MA FUSE Microphone 2BA-221 MODEL 2BA-221 20W MAX STACK Mic. CARMEL, CA USA OUTPUTS INPUTS Solid-State Out TUBE SOLID STATE PUSH FUSE IN SUMMITAUDIO. COM OUT +4 BAL. -10 BAL. INSERT IN MIC FUSE SUMMITAUDIO. COM +4 BAL. -10 BAL. +4 BAL. -10 BAL. +4 BAL. -10 UNBAL +4 Output To Monitor System Model FeQ-50 4-Band Passive, Parametric Equalizer 9 Applications Mixer Insert The Summit Audio FeQ-50 can be used to add world-class EQ to virtually any mixing board. [. . . ] The balanced tube output of the FeQ-50 feeds a digital delay which drives the right side amplifier. The solid state output of the FeQ-50 goes directly to the left side amplifier. Stereo Stage Rig Input +4 Balanced Output Digital Delay Unit Tube Out Low-level Output Input Solid-State Out Line input Input Amp Stage Right Amp Stage Left 12 Summit Audio, Inc. Block Diagram Block Diagram BOOST/CUT DIFFERENTIAL INPUT SHELF LOW FILTERS PEAK WIDE BOOST/CUT LOW-MID FILTERS NARROW BOOST/CUT HIGH-MID FILTERS WIDE NARROW SHELF BOOST/CUT HIGH FILTERS PEAK HIGH PASS BYPASS IN TUBE DIFFERENTIAL OUTPUT + IN BYPASS SOLID-STATE DIFFERENTIAL OUTPUT + - The electronically balanced input stage input goes directly into the passive EQ sections. [. . . ]