EQ1tp User Manual
Contents
1. wily Q OO 7300N NI YIMOd We 4 Y 4 ALIGINNHA Y NO AIM d Y1 Y LINGOYd 39 A FIOVIIOA T NONNA SYd ZISOAKAN 3NOIY19313 90H9 30 NO Nad Pi E 5 na INOSIY 37 IYINGIY YNOd NOILNILIY geTolpnvOW AY aH HUM BYNLSIOW YO NIVY OL LONGOYd SIHL sn 39 3SOdX3 LON Od MIOHS 7IY9IY 19773 YO ff Q uid 40 ASIH SH 30Nd3Y OL NOILLNVD ka asnd 3 a A AMT 7 ol 9 n25 O vas o J apo O PA 4 TA SS Pn a o J je ne waned 051 ov WI ou 06 06 09 TANVd LNOYS MCAudioLab EQ1ch Tube Equalizer FEATURES Hibrid vacuum tube and solid state design Out level volume control Bypass switch True led signal level XLR Input connector XLR Output connector Lundahl Output transformer One 6DJ8 Tube Ground lift switch output only Earth lift with 4mm external plug earth connector 19 2U rack space UNIT SIZE Width Standard 19 inches for rack mount installation Height Standard 3 50 inches or 2U rack space Depth 30 cm 12 2 inches Weight 5 kg 13 2 Ibs TECHNICAL DATA EQ1ch specifications Inputline Impedance gt 10k Ohm Balanced XLR Output line level Recommended minimum load output Impedance 600 Ohm Maximum Level 22 dBu Output Low Z transformer balanced Power Requirements 230 Vac 160 Watts Dimensions W x Hx D 19 x 3 5 x 12 2 Power Requirements 230 Vac 160 Watts Dimensions W x H x D 19 x 3 5 x 12 2 Weight 6 kg Shipping weight 8 2 Kg EQ1ch2. Thank you for your purchase of the MCAudioLab EQ1ch Tube Equalizer MCAudioLab NNG o VOLTAGE MODEL SERIAL IMPORTANT Fill in the boxes above with voltage model and your serial number to personalize your unit The informations and serial number can be found on the back of the product The serial number must be quoted in all comunication in order to obtain technical support and spare parts Please register your new MCAudioLab product on product registration section in www mcaudiolab com web site TABLE OF CONTENTS Introduction kpn panan 2 Warning_ nenengen anaman 2 Front and rear layout gt 3 Features i memamumumanaaranan 4 Technical data neneme 4 Functions 0 5 6 Signal flow schematic oo 7 Warranty Contacts EQ1ch Tube Equalizer 1 MCAudioLab INTRODUCTION This single channel equalizer is a passive eq with RC LRC circuitry and class A triode vacuum tube stage for the output Input balanced signal is driven by solid state circuitry The RC passive shelving equalization circuitry low freq and High cut feq is based on the classic design that is still the best sounding way to achieve high quality tonal control An active vacuum tube output section has fixed gain make up gain to compensate dB lost by passive stage and to accomodate input signal to balanced line The mid high frequency parametric section with boost and Q control is based on LRC circuitry The EQ1ch
3. a signal of 15dB or more is on XLR out Values of amount signal are given by IC comparator EQ CONTROLS LOW FREQ Rotary switch selector A 20 30 60 90 120 150Hz Use it to select low frequencies no Low Boost B knob controls theamount of gain on ay selected freq The Low Boost is a shelf filtenwith 14dB max of gain B c Low Cut C knob controls the amount of attenuation on sa w yN selected freq The Low Cut is a shelf filter with 12dB max of KANA attenuation Boost and Cut controls maybe used at the same time Boost Ce the cut filter action is reduced if used with boost control trim exceedind the first quarter K A x o o MID HIGH FREQ Rotary switch D 12 steps selector for Mid High freq 600Hz 1 1 5 2 3 4 5 8 10 12 14 16KHz JEG on Boost pot knob E controls the amount of gain on selected freq by D XF Hah stepped rotary switch The Boost is a peak parametric filter with in Ai KA 20dB max of gain Thesmaximum gain depends on the parametric o Q knob control position wr XE Q control knob onmid high freq F The Q pot knob control can be used to vary the Q factor in mid high filter section It acts on boost of mid high section control only The Q control knob makes peak filter broad or sharp HIGH FREQ i n Rotary switch selector G 4 6 8 10 12 16 20KHz Use it to e select high frequencies Low Cut H knob controls the amount of attenuation
4. filter characteristics Low Boost Cut at 20 30 60 90 120 150HZz Shelving 0 to 14dB Boost 0 to 12dB Cut High Cut at 4 6 8 10 12 16 2OKHz Shelving 0 to 10dB High Boost at 0 6 1 1 5 2 3 4 5 8 10 12 14 16KHz 0 to 24dB sharp Q 0 to 16dB broad Q High Bandwidth Q Sharp 0 8 to4 dep on frequencies Broad 0 2 to 1 2 dep on frequencies Adjustable output from to 0 atten control In line with our company policy of continuous development the above specifications are subject to change without notice EQ1ch Tube Equalizer 4 MCAudioLab FUNCTIONS OUTPUT The output knob is master volume control attenuation control potentiometer It determine the amount of signal sent to the output stage The rang is from 90 knob hard left to the maximum amount of gain stage hard right INPUT The rear panel XLR balanced input connector is optimized for low impedance audio line signal tip 600 Ohm BYPASS switch This toggle switch connects directly the input XLR socket to the output XLR one pin to pin connection The bypass switch act only if EQ1chis powered on When the bypass switch is on the LED meter is on standby mode LED METER Three led indicates the amount of signal present at the XLR output according to 4dB standard The sgn green led indicates that a signal of at least 15dB is on XLR out The OdB orange led indicates that a signal of 4dBiis on XLR out The ovr red led indicates that
5. is a highly musical equalizer for a variety of program material from individual tracks to voices and instruments The output stage utilizes the same Lundahl transformer used on the TP4ch mic preamps Each unit is built for a great and to last All power supplies are solid state and fully regulated for long hum free operation and highly filtered to avoid disturbances from the electricity mains Each passive eq is hand built and meticulously tested and listened before shipment to the customer WARNING Before you start your new MCA Tube EQ please read the following Any tube product is sensitive to a high sound pressure level environment This may cause microphonics in a recording situation Make sure you are able to fit shock mount and place the unit in isolation if necessary Direct light will also effect tubes as well PLEASE be sure to have enough space between any stuff this will ensure your tube unit will not be over heat Over heating will cause damage to the tubes and shorten their life span Included in the box The EQ1ch Tube Equalizer Power cord This instruction manual udiolals EQ1ch Tube Equalizer 2 MCAudioLab EQ1ch model layout SAN Rea We ng pyak 4 T 5 Andang sanding ane AOSAN YAL Ye AMGA mavIolanvon anDdIMLI313 NOHO 30 INOSIH 5 4 NadO LON OG J gt OP a 0 MOOHS TWOIMLOSTA 40 MSIY l l A SN V SIN NOLLNVI V was
6. not manufactured or supplied by MCAudioLab or by unauthorized modification of the equipment Vacuum tubes are excepted from the warranty but are warranted for 90 days from date of purchase Except as expressly set forth in this Warranty MCAudioLab makes no other warranties express or implied including any implied warranty of merchantability and fitness for a particular purpose Warranty Repair If the EQ1ch should develop a problem during the warranty period contact the factory to return shipping instructions We will repair and return your MCAudioLab equipment quickly Note that the warranty does not cover vacuum tubes which mustibe periodically replaced How to contact us MCAudioLab 84 86 Viale della Rinascita 93017 San Cataldo CL ITALY info mcaudiolab com www mcaudiolab com MCAudioLab shall not be liable for technical or editorial errors or omissions in this manual nor for incidental or consequential damages resulting from the use of this material Characteristics may change without notice EQ1ch Tube Equalizer 8 MCAudioLab
7. on gsx NG selected freq The Low Cut is a shelf filter with 10dB max of H attenuation EQ1ch Tube Equalizer 5 MCAudioLab Power Usethis switch to turn the uniton and off Controls primary AC power to the unit The primary power is applied to the EQ1ch circuits when the Power switch is in the up position The power toggle switch connect or disconnect the phase wire of main AC power supply IEC connector on the rear When off the apparatus is not completely disconnected from AC power source Detach IEC power cord if EQ is unutilized for a long period GROUND LIFT When it is activated unlinks pin 1 from signal ground GND to avoid hum Ground lift acts on XLR out connector only EARTH LIFT This switch will lift the main earth connection of the chassis from signal ground GND so you can avoid hum noise Chassis is permanently earth connected via centarl pin of IEC socket The earth is always connected with a standard plug on the rear of each unit AC Plug TP1ch uses a standard detachable IEC power cord Insert the AC power cord firmly into this socket caution please check to see what voltage your EQ1chis set to The voltage setting is marked on the serial badge on the rear panel Make sure the voltage is properly set for your area before applying AC power to the unit Check that this complies with your local supply if not please notify MCAudioLab before powering up Your EQich has been factory set to the correct mains voltage for yo
8. ter before using it Proper maintenance and cleaning in combination with routine checkups by your authorized service center or dealer will ensure the best performance and longest life for your tube audio gear CAUTION Tube replacement should be performed only by qualified service personnel who are familiar with the dangers of hazardous voltages that are present in tube circuitry EQ1ch Tube Equalizer 6 MCAudioLab EQ1ch signal flow schematic 45 Q 2 jan O Nn A 0 S oe ao 5 00 25 Bis 3h ge Qc 4 p vA gt 0 OF Passive D D O gt S S w x eo Ry 255 ga Dans Line Input All XLR connectors are wired according to AES standard pin 1 is ground GND pin 2 is high or and pin 3 is low or A positive voltage on pin 2 of the input will result in a positive voltage on pin 2 of the output with the Phase Reverse switch set to Normal Grounding and Shields The Input XLR connector pin 1 GND is directly connected to equipment ground The GND is connected to pin 1 of the output connector and to earth depending on earth lift switch position EQ1ch Tube Equalizer 7 MCAudioLab Limited 1 year Warranty During the warranty period MCAudioLab will repair or replace defective parts with new ones at no additional charge This warranty does not extend to any equipment that has been damaged or rendered defective as a result of accident misuse or abuse by the use of parts
9. ur country If you plan to take the unit to countries with a different mains voltage you will need to send the EQ1ch to the MCAudioLab Service Center for the correct transformer primaries wiring conversionand fuse changing Do not attempt to defeat the safety ground connection Fuse This unit employs an external AC line fuse easy access to change your fuse as necessary to help protect it from damages due to overload conditions If the fuse fails replace it If the fuse fails repeatedly discontinue use of the unit and contact MCAudioLab for service information Remove the power cord before checking or changing the fuse To avoid any permanent damage replace fuse with the same rate and type only a 2A 5 x 20mm type fuse is required for operation at 230V a 4A 5 x 20mm type fuse is required for operation at 115V Survival Tips For Tube Equipment To prolong tube life observe these simple recommendations After using the equipment allow sufficient time for it to properly cool down prior to moving it A properly cooled gear prolongs tube life due to the internal components being less susceptibleto the damage caused by vibration Allow the tube to warm up to room temperature before turning it on The heat generated bythe tube elements can crack a cold glass housing Protect the gearfrom dust and moisture If liquid gets into or ifthe gear is dropped or otherwise mechanically abused it must be checked out in an authorized service cen
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