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Sheer Acoustic Equaliser Direct Blend: EDB-2 

 

Multi-function Pre-amplifier with EQ, Blend & Direct Injection 

functions for superior Acoustic Amplification. 

 

 

Designed in UK 

 

INSTRUCTION MANUAL 

 
 
 
 
 
 
 
 
 
 
 

EDB-2 provides a beautifully voiced and practical solution to the  

diverse and critical needs for high quality acoustic musical instrument 

amplification.  

 

Suitable for stage and other signal processing.

 

 

EDB-2 offers an increased range of gain to interface better with  

Mixers, luxurious amounts of EQ and other highly versatile facilities to 

get the best possible sound from amplified acoustic stringed  

instruments. 

 

Now offering reduced noise levels!

 

Summary of Contents for EDB-2

Page 1: ...y voiced and practical solution to the diverse and critical needs for high quality acoustic musical instrument amplification Suitable for stage and other signal processing EDB 2 offers an increased range of gain to interface better with Mixers luxurious amounts of EQ and other highly versatile facilities to get the best possible sound from amplified acoustic stringed instruments Now offering reduc...

Page 2: ...ophones Now offering 3 way Impedance switching on Ch 2 Tuneable notch filter with switch for extended range of attack on feedback and problem frequencies Now offering notch filter on Ch 1 or Ch 2 Range switch with settings for Guitar Bass and Violin Removes unwanted boom handling noise and low frequency feedback to amplify a clearer more musical tone of the instrument Signal splitting enabled e g ...

Page 3: ... supply Powered via regulated mains power supply unit PSU included or 9v PP3 6F22 batteries 2 included Sturdy steel housing with quality pots and long life sockets Choice of input and output connectors Congratulations on your astute purchase Please read this comprehensive manual carefully before switching on or plugging in the EDB 2 Text is also available on website below www headwaymusicaudio com...

Page 4: ...NOTCH FILTER 12dB Notch Q Band width Freq Centre Frequency of cut Switches CH 1 CH 2 or OFF 5 BAND EQ SWITCH Assigns 5 Band EQ to CH 1 or CH 2 or BOTH XLR SWITCH MIC IN 18v Phantom ON Phantom OFF XLR OFF RANGE FILTER High Pass Filter VIOLIN 192 Hz GUITAR 85 Hz BASS 41 Hz PHASE Reverse the Phase of CH 1 or CH 2 Signal An Feedback Op on INPUT IMPEDANCE HI HI Passive Pickups Ac ve LOW Powered or Low ...

Page 5: ...8v AC DC Adapter Input Connector Use ONLY Headway EDB PSU BATTERY PANEL PP3 6F22 x 2 With Cap ve Screw EDB 2 Front Panel PHANTOM POWER TO CH 1 JACK IN SWITCH CH 1 JACK IN Mono IN Refer to Input Impedance Switch Phantom Power Switch CH 2 MONO JACK IN Routes Stereo to Both Channels if No Jack in CH 1 CH 2 MIC XLR IN Balanced with 18v Phantom Power Op on See XLR Switch XLR Off On Phantom On OPTIONS Be...

Page 6: ...SECTION 4 CHANNEL 2 4 1 INPUTS LEVEL CONTROL 4 1 1 MIC INPUT XLR 4 1 2 STEREO JACK INPUT 4 1 3 PHANTOM POWER 9v 4 1 4 PHANTOM POWER 18v 4 1 5 GAIN CONTROL 5 MUTE LIVE SWITCH 6 NOTCH FILTER CONTROLS 7 MASTER VOLUME CONTROL 8 RANGE CONTROL SWITCH 9 BATTERY POWERING 10 PHASE REVERSE 11 SPECIFICATIONS 12 TROUBLE SHOOTER CHECKLIST ...

Page 7: ...hock ensure that any input output cables from EDB 2 are connected to amplification or signal processing devices e g mixers amplifiers effects units so that where Mains powered devices are used there is a continuous unbroken chain of Mains earth connection and where the mains supply at the venue offers a viable Earth or Ground connection DO NOT disconnect the ground earth wire on any connected main...

Page 8: ... 1 1 6 MICROPHONE SAFETY WARNING Where microphones are used into EDB 2 or PA system try to use Government Type approved Licensed Radio Mic s and Transmitters 1 1 7 CABLE PRE AMP PLACEMENT WARNING Place EDB 2 and cables where visible and cannot cause accidents e g on a table Mic stand or Belt mounting DO NOT BLOCK EXITS 1 1 8 PRECAUTIONS DURING USE Treat your EDB 2 with care and do not drop it trea...

Page 9: ...ir Not for Re sale Value for Customs 30 00 Customs Code 8518 10 40 Unit will be returned to sender See Transport 1 8 If returning product for repair service you must include Your full contact details including name phone number full mailing address and email address A full description of any problems If claiming under Guarantee Warranty you must also include Proof of Purchase clearly indicating da...

Page 10: ...on 1 6 PERSONAL INJURIES Headway Music Audio Ltd cannot be held responsible for personal injuries or damages related to its products such as those caused by heat fire obstruction modifications or electrical shock where obtained due to a lack of care on the part of the injured party or due to that persons ignorance of the instruction manual or due to that persons ignorance of best practices in the ...

Page 11: ...arantees partly completed registrations expired guarantee periods or 3rd party issue guarantees will NOT qualify for free repair work or free transportation WHAT IF I HAVE NOT REGISTERED THE GUARANTEE If you have not registered the Guarantee Warranty within 30 days of purchase you are not covered by the 12 Month Guarantee unless you are the end retail customer and have purchased direct from Headwa...

Page 12: ...t are flexible structure types but some film pickups are encased in rigid metal Suitable cable should have at least 80 screening preferably braided or conductive plastic shielding with extensive lapped screening Metal jack covers should always be used with the cable as short as is possible no more than 2m 6 with standard quality cables e g Klotz or Van Damme or 3m 9 with special low capacitance ca...

Page 13: ...D IN Mini Jack Socket The Mini Jack Socket 3 5mm diameter on side panel is intended mainly for connection of iPod for use of recorded music such as for backing music interval music or for tuition purposes It by passes Gain EQ and feeds into Master Volume Control ACW Backing a knob off or turning it Anti Clockwise CW Turning a knob up or turning it Clockwise 3 1 6 GAIN Knob 0 10 0dB 32dB Gain Turn ...

Page 14: ... between Lower Mid Upper Mid and possibly Presence controls and listening for a preferred blend Typical Instrument EQ requirements Larger instruments such as Steel Strung Acoustic Guitars often require a mid range cut especially where full chords are played Headway HE4 Snake3 Fixed EQ pickups will require less EQ applied than most other pickups because they incorporate an active tone section which...

Page 15: ...trument bias towards the low strings Increase Bass CW to beef up tone or bias lower strings more strongly 3 2 2 LO MID Control 13dB centred broadly 590Hz Allows control of LO MID range which is centred above bass but below UPPER MID Cut LO MID ACW to thin out tone or linearise or naturalise the tone of many lower mid biased guitar pickups and speakers Cut LO MID to reduce body handling noise or ov...

Page 16: ...ch use the term to denote high treble 3 2 5 TREBLE Control 13dB Centred broadly 10 kHz HIGH allows control of treble at higher end of the audio spectrum which offers you increased brightness on turning CW or a jazzy mellow sound on turning ACW Treble overlaps mainly into Presence area However low strings will produce high tones or harmonics Cut Treble ACW to reduce high end feedback harshness exte...

Page 17: ...ual in live work as they are tougher and often easier to use than condenser types but are less subtle and accurate for acoustic instruments and do not require Phantom Power IMPORTANT Before Switching Phantom Power ON Off switch Standby ON first Mic Use Notes Headway Music Audio Ltd do NOT recommend the use of internal Mics within instrument bodies for several reasons Firstly musical instruments ar...

Page 18: ...s or changes angle slightly or you take it to a different acoustic environment the problems are likely to worsen again Anti feedback devices can help but the harder they work the more holes or bigger holes in the sound they need to remove which defeats the aim of using a Mic Instead if you use Mics we suggest you use them externally with Hyper Cardiod polar patterns such as the DPA 4099 with its s...

Page 19: ... Jack Lead or wired to accept Phantom Power to TIP Active Pickup or Active Pickup Mic Blender Systems wired for Phantom should NOT require an Internal Battery This may be an advantage where maximum active system performance is required but where battery access may be restricted e g f Hole Instruments and Resophonic Guitars CAUTION BE SURE TO CHECK IF PHANTOM POWER IS REQUIRED BY CHECKING THE WIRIN...

Page 20: ... best combined use of Gain Master 5 MUTE LIVE SWITCH Mute position with Red LED illuminated indicates that Output is OFF Useful to allow silent tuning in front of audience or to switch off during periods of inactivity without re setting controls Mute also offers quieter plugging in to inputs 6 NOTCH FILTER CONTROLS Sometimes known as a Sweep the Notch Filter utilises the two knobs and a Sliding On...

Page 21: ...or muddy lower mids You could try the Notch Filter on what seems to be the most problematic frequency spectrum leaving the other EQ controls at their centre setting as a starting point Here are a few potential strategies How to sweep out unwanted low end bass low feedback boom percussiveness external hum or rumble etc below or at the low end of the instrument range a Set the NOTCH frequency ACW we...

Page 22: ...uld be that carefully tuned active EQ boost and cut can be used creatively beyond just problem solving 7 MASTER VOLUME CONTROL Sets the output level of the EDB 2 preamp which is fed to the LINE OUT and DI Out sockets Also applies as control to Aux In See 3 1 6 Gain Master Joint Operation 8 RANGE CONTROL 3 Way Slider Switch This sets a High Pass Filter which rolls off low frequencies according to t...

Page 23: ...nnector and Female to Male Red Positive Black Negative Batteries should be matched and fitted new and checked so as not to be leaking If one battery is leaking even slightly dispose of batteries and replace with two new ones 1st Lithium 200 Hrs of Power ON or 100 150 Hrs typical if Phantom Power Switch ON When using Phantom actual battery life will be determined by the current draw of the device b...

Page 24: ...t feedback after more fundamental methods have been attempted See Trouble Shooter Checklist 12 1 11 SPECIFICATIONS 11 1 PHYSICAL SPECIFICATIONS Approx Dimensions Length 138mm 5 5 Width 93mm 3 7 Depth of Metal Box 38mm 1 5 Depth including Knobs 43mm 1 7 Weight 550g 1lb 4oz Weight of package complete with power supply in Packaging Box 880g 1lb 15oz Mic Stand Bracket Connector Female threaded bush on...

Page 25: ...ck Plug routes Tip to Ch 2 Ring to Ch 1 Gain Control to XLR Continuously variable 0 50dB 11 2 3 AUX IN iPod IN Mini Jack Socket 3 5mm Diam Input Impedance 1 MegOhm 11 2 4 BAXENDALL INTERACTIVE 5 BAND EQ SECTION Bass 12dB Shelf 120 Hz Or 16 dB 45 Hz Low Mid 13dB Shelf 590Hz Hi Mid 12dB Shelf 900Hz Pres 7dB Shelf 2 8kHz Treble 13dB Shelf 10 5 kHz 11 2 5 NOTCH FILTER Q Width ACW SHARP CW BROAD 5 0 0 ...

Page 26: ... Mix of Ch 1 Ch 2 Aux IN via XLR Out Mono XLR Wiring Pin 1 Earth Ground Pin 2 Signal Plus Pin 3 Signal Minus TYPICAL NOISE PERFORMANCE THD Total Harmonic Distortion Master set to 2 O Clock 1400 Hrs CH 1 Instrument Gain set for 20 dB Gain 90 dBu True RMS 20Hz 20 kHz CH 1 setting as above THD 0 05 Throughout Audio Range CH 2 Mic XLR Gain set for 30dB Gain 84 dB True RMS 20Hz 20 kHz CH 2 setting as a...

Page 27: ...s Environmental Disposal Power Supplies Batteries and Pre amplifiers should NEVER be randomly disposed of in a bin or sent for landfill disposal Pre amplifiers should be repaired or use local re cycling and electronics collection schemes RoHS Headway products are free of lead and other environmentally damaging substances Conforms to RoHS regulations 12 TROUBLE SHOOTER CHECKLIST 12 1 AVOIDING ACOUS...

Page 28: ...using Mics avoid Omini Directional and use Uni Directional preferably Hyper Cardiod such as DPA Contact pickups such as The Band Bowed Instruments to give an advantage over Mics on feedback rejection Headway s active under saddle pickups in fretted instruments HE4 Snake3 or the VL3 Violin Bridge Pickup should offer much greater sound pressure levels before feedback Electronic feedback destroyers a...

Page 29: ...ointed towards tre ble strings area of upper bout a little away from sound hole If a magnetic pickup is fitted in the sound hole where possible adjust ment of the magnetic pole pieces and overall pickup heights may enable the string balance to be adjusted 12 3 POOR SOUND WEAK DULL or DISTORTED Make sure that any batteries such as 9V PP3 on pickup systems and pedals are in good condition Low Batter...

Page 30: ... AC mains ring which is not used for stage lights Hum and buzz can be generated in stringed instruments where there is no earth connection between the output jack ground and strings or any tail piece Cut externally generated hum via notch filter by cutting with Notch Q on minimum at around 50 60 Hz Excessive hiss will normally be produced by a faulty device or poor quality noisy device in the chai...

Page 31: ...nections and use a Meter Cable Tester Make sure jack probes are straight and that the tip contacts are not mis shapen in any way Check that XLR leads are wired correctly See Specifications Make sure that connectors to your instruments fit firmly into their sockets If a socket is incorrectly fitted by being set in too deeply into a guitar to make contact Check that mains supply is operating in chai...

Page 32: ...ic Guitar The Band Bowed Instrument Instant fit wrap around passive body pickup e g Violin Viola Cello Double Bass EDM 1 Equaliser Direct Mini Sub Compact EQ Pre amp with comprehensive EQ and Range Anti feedback Control plus optional DI connector EDB 2 Equaliser Direct Blend Multi Function Pre Amplifier with EQ Blend DI functions for Superior Acoustic Amplification Sheer Acoustic SA2 SA2 B Active ...

Page 33: ...nd you use only Headway Pickups and good quality true Condenser Mics such as the excellent DPA Miniature Instrument Mics Find out more about Headway s other products from Headway Music Audio Ltd Headway House Walnut Tree Works St Thomas Street Deddington Oxfordshire OX15 0SY United Kingdom www headwaymusicaudio com The British Acoustic Specialists Making Acoustic Instruments Louder Since 1995 Copy...

Page 34: ...34 OTHER HEADWAY PRODUCTS INCLUDE EDM 1 Mini EQ Pre Amp DI Box HE4 SNAKE3 Under Saddle Ac ve Pickups THE BAND Instant fit Pickup for Violin Viola Cello Double Bass ...

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