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twinQ

CS

Dual recording channel

"If it sounds right; it is right."

Joe Meek 1964

CurrentSense mic/instrument pre amp

photo optical compressor

Dual Channel

Meequalizer

JOEMEEK

C O M P R E S S I O N

C O M P R E S S I O N

twinQ

CS

Dual Recording Channel

- User's guide

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Summary of Contents for twinQCS

Page 1: ...S Dual recording channel If it sounds right it is right Joe Meek 1964 CurrentSense mic instrument pre amp photo optical compressor Dual Channel Meequalizer JOEMEEK C O M P R E S S I O N C O M P R E S S I O N ...

Page 2: ...1 twinQCS Dual Recording Channel User s guide ...

Page 3: ...ent 12 Front panel controls 13 Technical specification 14 Regulations Safety Warranty 16 Digital upgrade 17 Warranty Ted Fletcher This instruction book was written by Ted Fletcher the designer of the original JOEMEEK compressor and the whole JOEMEEK range of professional audio equipment Ted worked in the studio with Joe Meek the legendary record producer in the mid 1960s 2 ...

Page 4: ...t possible sound in preparation for mixing and recording in digital formats Recordings made using inferior preamplifiers may sound acceptable during recording but the resulting thin and muddled sound after mixing can never be processed out Great sounding recordings are only possible with good input and best possible treatment at the pre amp stage THE INPUT AMPLIFIER Best results are achieved by us...

Page 5: ...is that the sound from the TwinQ is characteristically full bodied and rounded in character Such extreme LF response can often bring its own problems so a subsonic High Pass filter can be switched in with a front panel push button OVERLOAD MARGINS In the mid 1970s Ted Fletcher designed a range of mixers specifically for use by the Independent Broadcasting Authority and the BBC One of the specifica...

Page 6: ...Press in the MIC LINE switch in for MIC and out for LINE Turn the INPUT GAIN knob down to minimum then If you are using a capacitor microphone plug in the microphone then switch on the phantom power by pressing in the Phantom switch Do it in that order NOTE Some phantom powered microphones take several minutes to reach correct working conditions Remember to switch on at least 5 minutes before usin...

Page 7: ...lifiers are CS type CS stands for Current Sensing Conventional microphone amplifiers amplify the voltage generated across the input impedance of the amplifier The sound is heavily affected by cable quality length capacitance and many other factors The Current Sensing amplifier directly converts the coil current into usable audio so that the sound from the microphone amplifier is exactly the same a...

Page 8: ...n is extremely good The disadvantages are that the design is more difficult to produce cheaply and according to those who judge equipment by specifications and not by listening the older design is less flexible in operation and more difficult to use JOEMEEK begs to differ st Using 21 century electronics for the control circuitry Ted Fletcher has recreated the compressed sound of the 60 s a sound t...

Page 9: ...r and limiter to stonewall any and all signals above a certain level The musical effect is that VCA compressors sound muddy and flat while the historic compressors sound lively and retain sparkle But all compressors change the sound to some extent The JOEMEEK Studio Channel compressor adds punch and bite without the dull muddiness of all others USING THE COMPRESSOR A compressor IN OUT switch is fi...

Page 10: ...the compression releases at a speed according to the release control NOTE When both attack and release are set to maximum speed both fully anti clockwise the speed of the circuit action is very much quicker than is possible to show on conventional meter movements so the meters cannot register the amount of transient compression accurately STEREO OPERATION When the link switch is depressed yellow l...

Page 11: ...mpression electronics are driven hard before the gain has been controlled by the light cells The cells catch up and overcompress momentarily giving a tiny dip immediately following the start of the note This is best demonstrated when recording drums With Slope set to maximum and attack and release to fastest Used sparingly this can contribute to musical drive Slower attacks are used where the comp...

Page 12: ...ol and readjust the microphone amplifier gain 4 I can t make the compression gentle enough It takes practice The setting of the Attack control close to fastest is quite critical as is the compression control Also longer release times lead to a less noticeable compression effect THE GAIN MAKE UP AMPLIFIER The JOEMEEK compressor is essentially a passive piece of electronics That means that under com...

Page 13: ...aximum so that the effect of all but the most extreme lifts and cuts will be musically pleasant to listen to The HF high frequency control gives shelving lift and cut of up to 15dB at 8KHz When using the equaliser bear in mind that lifting any EQ will increase the volume level in the channel and so can reduce the overload margin Be prepared to turn down the input gain to compensate BALANCED OUTPUT...

Page 14: ...EVEL output is low impedance balanced at zero level POWER Mains input is 230 115V AC via the IEC socket The socket has an integral fuse holder Rotation of the fuse holder selects alternative AC voltage MAINS SWITCH is on the rear panel THE FRONT PANEL CONTROLS MIC LINE SWITCH has an LED indicator to show when LINE has been selected Press the button in for MICROPHONE NOTE Instrument Input jack sock...

Page 15: ...dio signal Shorter times mean more noticeable compression VU METER shows either audio volume level within the TwinQ before the output control or the amount of compression being applied VU SWITCH selects compression or VU mode for the VU meter EQUALISER MeQ switches the Meequalizer into and out of circuit An LED shows when the EQ is in circuit LF gives low frequency lift and cut MF give mid frequen...

Page 16: ...ad resistor Self noise approx 132dB HARMONIC DISTORTION Generally within 0 002 AMPLITUDE FREQUENCY RESPONSE Line in 12Hz to 20KHz within 0 5dB Mic in 12Hz to 16KHz within 1dB High pass filter 3dB down at 50Hz FILTER Push button high pass filter switch and indicator operates at 50Hz at 12dB per octave OUTPUTS High level balanced 150 ohm 0dBu for 0VU variable Max balanced output approx 24dBu Insert ...

Page 17: ...SING 2U rack mounting totally enclosed aluminium case depth approx 250mm weight 1 5Kgs REGULATIONS AND SAFETY The JOEMEEK TwinQ has been designed and built to conform to all known safety requirements in the world Within the European Union the TwinQ easily meets the requirements for electrostatic and electromagnetic emissions and conforms to all safety requirements of the European Common Market the...

Page 18: ...io Channel VC1Q Controls The VC1QD offers simple operation A basic rate selection of 44 1 48k on a pushbutton and a x2 pushbutton enabling higher sample rates Headroom is plentiful with full 24bit resolution Capturing highly dynamic material is no problem AES EBU connection is also no difficulty as the output from the upgrade module is transformer balanced Output S PDIF 24bit at 44 1 48 88 2 96KHz...

Page 19: ...ound Manufactured by FLETCHER Electroacoustics Ltd St Mary s Barton Road Torquay Devon TQ1 4DP ENGLAND Tel 44 0 1803 321921 Fax 44 0 1803 321922 e mail sales joemeek net DECLARATION OF CONFORMITY This analogue audio processing equipment conforms to the standards and requirements of the European Economic Community The EC Harmonised standards that have been applied are a Electrical equipment safety ...

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