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The Stereo mode switch is a powerful facility, enabling precise tracking of 
equalisation between channels, with quick adjustment and no need to match settings 
on two sets of controls. All of the EQ controls are ganged; i.e. Cut/Boost, Frequency, 
Q and band in/out switching. The input and output gain controls, high and low pass 
filters and overall EQ in/out switches retain individual channel operation for 
maximum flexibility. 
 
A solid state, electronically balanced output stage with outputs switchable for +4dBu 
or -10dBu nominal output level completes the channel. The balanced signals are 
terminated on metal XLR sockets, with unbalanced line level inputs and outputs 
provided on 0.25” jack sockets. 
 
 
Please read this manual fully before installing or operating the Equaliser. 

 
 

PRECAUTIONS 

 

The T L Audio EQ2 Parametric Valve Equaliser requires very little installation, but 
like all electrical equipment, care must be taken to ensure reliable, safe operation. The 
following points should always be observed: 
 
- All mains wiring should be installed and checked by a qualified     
  electrician, 
 
- Ensure the correct operating voltage is selected on the rear panel 
  before connecting to the mains supply, 
 
- Never operate the unit with any cover removed,  
 
- Do not expose to rain or moisture, as this may present an electric 
  shock hazard, 
 
- Replace the fuse with the correct type and rating only. 
 
 
 

Warning: This equipment must be earthed.

 

 

Summary of Contents for EQ2

Page 1: ...T L Audio User Manual EQ2 VALVE EQUALISER Tony Larking Professional Sales Limited Letchworth England Tel 01462 490600 Fax 01462 490700 ...

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Page 3: ...om line level signals in the range 20 to 20dBu A front panel mounted auxiliary jack socket allows direct access to the channel inputs The input is suitable for a variety of sources including guitar acoustic pickup and keyboard The input section also provides continuously variable individually switchable high and low pass filters to tailor the frequency response to eliminate unwanted LF or HF noise...

Page 4: ... metal XLR sockets with unbalanced line level inputs and outputs provided on 0 25 jack sockets Please read this manual fully before installing or operating the Equaliser PRECAUTIONS The T L Audio EQ2 Parametric Valve Equaliser requires very little installation but like all electrical equipment care must be taken to ensure reliable safe operation The following points should always be observed All m...

Page 5: ...V to 240V 50Hz AC The setting may be adjusted by inserting a small flat bladed screwdriver into the slot of the switch and sliding the switch to the left for 115V or to the right for 230V Alternate supply voltages may also require a different power cable or mains plug If in doubt consult local electrical regulations Warning attempted operation on the wrong voltage setting or with an incorrect fuse...

Page 6: ... jack plug is required which should be wired as follows Tip Signal Phase or hot Screen Ground Insertion Points The insertion points are interfaced via a 3 pin 0 25 switched jack socket on the rear of the unit The pin connections are Sleeve Ground Tip Send Ring Return The insertion point is unbalanced and operates at a nominal level of 2dBu If used as an additional send only e g as a send to a tape...

Page 7: ... which results in the best signal to noise ratio whilst preserving sufficient headroom Unbalanced Outputs An unbalanced line output is provided for each channel on a 0 25 mono jack socket Tip Signal Phase or hot Screen Ground Ventilation The unit generates a small amount of heat internally mainly due to the valve heaters This heat should be allowed to dissipate by convection through the grill in t...

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Page 10: ...he control to minimum with the EQ by passed and gradually increase the gain until the required output level is achieved Unity gain 0dB is obtained from the line input at the centre detent of the gain control Auxiliary Input The front panel auxiliary input socket accepts signals from guitar keyboard and high impedance pickups or microphones Plugging a jack plug into the auxiliary socket automatical...

Page 11: ...tand out or recede into the mix Finally low Q values down to about 0 5 on the EQ2 provide more gentle contouring or sweetening of the response The four bandsofEQ per channelare nominally designatedasLF low frequency LM and HM low and high mid frequency and HF high frequency However the frequency variation availableon each band allows overlapping of two or more bands into the samefrequency range Th...

Page 12: ...e JO S e l S J S fBnb q l noJq l I A I 8U I eJ dO UB 0 1 dn MOl ApU l S SUOO IB zoa q l JO SO l S l l O eIBqO UO jjO l S P ql U1UrnW J WOOJp e q JO gpZ A p ewrxOJdd e S J q l U qM s I eu Wnn aa l J e d p J ql J pIBq U A lP IB S AfBA q l S e ngp91 0 1 17 UBJ q l J AO AJ SU l U U U S e J U S AfBA q l Aq P I eJ U U q l U l UO U WIBq U A JO U WIBM q l JO l U P q l JO UO I e pU pOO e S A aa l A lP J qU...

Page 13: ...ge30Hzto 1KHz HF cutfrequencyrange1KHzto 25KHz Equalisation Fourbandsperchannel individually switched plusoverallEQ ON switch Eachchannelfully parametric with continuouslyvariablecut boost frequencyandQ LM andHM bandspeaking LF andHF bandsswitchableto shelvingor peakingresponse Cutandboost 15dB Frequency range LF andLM 30Hzto 3KHz Frequency range HM andHF 1KHzto 20KHz Q range0 5to 5 StereoOperatio...

Page 14: ...H IZZ ZHZZ I I u Ul u ngpt J J Jgp08 3S ON uno SJ ijY l U P U oro gp l 0 ZH IOt O ZHOI 3Soods3 1 A303nb3 l l l UU J J A lp nd no mS Oft t SRld J IY 03 J S A A UO s u Jrn s PO J LXV lI 8J 3 X S S3AIWA P u q ngp9 l I I wnw 1 1 Itrn Ul U ngpOI JO ngpt O lq q I S I u d J J S Os f U I qun snld S lIlX P u l g s nd no U J gp SI 1 l ooJ 13A3 J l3 S I ...

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Page 19: ...ls or workmanship will be repaired free of charge The warranty excludes damage caused by deliberate or accidental misuse tampering operation on the incorrect mains voltage or without the correct type and value of fuse fitted It is the user s responsibility to ensure fitness for purpose in any particular application The warranty is limited to the original purchase price of the equipment and exclude...

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