headway EDB-2 Instruction Manual
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headway EDB-2 Instruction Manual

Sheer acoustic equaliser direct blend
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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!
 1 

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  • Page 1 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.
  • Page 2   From a single compact box, the EDB-2 can take on a unique range of functions and qualities which include: • Refined Class "A" inputs and Pro Audio IC components. • Voiced for warmth, clarity & low noise Now offering increased clarity and even lower noise.
  • Page 3 • 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 Headway Quality! Built to last &...
  • Page 4     HEADWAY EDB‐2 Top Panel  LOW BATTERY LED  EARTH/GROUND LIFT  POWER ON/OFF/STANDBY  Lights BLUE when  Prevents Hum Loop by   Green LED  Ba eries are within  Disconnec ng Pin 1 from  Indicates Power  hours of expiring  XLR OUT  Pause in Standby Posi on to  Reduce Power on “Thump”  MASTER    Sets Output Level  to LINE OUT    & XLR Out NOTCH FILTER    ‐12dB Notch Q=Band width  Freq. = Centre   Frequency of cut.  MUTE  Switches : CH.1 CH.2 or  Turns OFF     Output Signals  Re. Red LED.  LIVE Denotes   Pre‐Amp  Output ON ...
  • Page 5 Post EQ to Master Vol.   OPTIONS  Belt Clip  (as shown) or  EDB‐2 Front Panel  Mic Stand Adaptor 19/32” (15mm)  CH.1 JACK IN  CH.2 MONO JACK IN  CH.2 MIC/XLR IN  PHANTOM POWER  Mono IN  Routes Stereo to Both  Balanced with  TO CH. 1  (Refer to Input Impedance  Channels if No Jack in CH.1  18v Phantom  JACK  IN SWITCH  Switch & Phantom Power  Power Op on.  Switch)  See XLR Switch:  XLR Off/On  Phantom On  EDB‐2 Rear Panel  DI/XLR LINE OUT  BATTERY PANEL  Balanced Line    (PP3/6F22 x 2)  EXT. POWER IN  Output XLR (Mono Mix)  With Cap ve Screw  18v AC/DC Adapter Input Connector  This does NOT accept Phantom Power  Use ONLY Headway EDB‐PSU  From Mixer*   5 ...

  • Page 6: Table Of Contents

      CONTENTS 1 SAFETY PRECAUTIONS & OPERATION 2 EDB-2 FEATURES, POWER ON & STANDBY 3 CHANNEL 1: 3.1.1 - 3.1.6 INTERACTIVE 5 BAND EQ SECTION 4 CHANNEL 2 INPUTS & LEVEL CONTROL 4.1.1 MIC INPUT XLR 4.1.2 STEREO JACK INPUT 4.1.3 PHANTOM POWER 9v...

  • Page 7: Safety Precautions & Operation

    Equaliser Direct Blend unit very carefully: IMPORTANT: Make sure that you power only by Headway's supplied Power Supply Unit: Headway EDB PSU or via 2 x PP3 (9v) batteries as included with this unit. (Suitable for EDB-1 & EDM-1) Mains Plug Connector Types available for EDB-2: UK = United Kingdom/Eire/Singapore (e.g.
  • Page 8 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, tread on it or subject it to liquids, extreme heat/cold or rough handling.
  • Page 9 Music Audio Ltd. or its approved agents where applicable. All returns must be sent pre-paid and should be insured against loss. Headway Music Audio Ltd. will NOT be held responsible for losses in transit or for duty and taxes incurred, e.g. where customs documentation is completed incorrectly.
  • Page 10 1.7 WARRANTY/GUARANTEE TERMS EDB-2 guarantee is valid for up to, but no longer than 12 months from the date of purchase, but valid only after the guarantee registration has been made online at www.headwaymusicaudio.com All guarantee issues will be subject to assessment by Headway and appointed service agents where applicable.
  • Page 11 BEFORE THE 30 DAY PERIOD EXPIRES! 1.8 STORAGE & TRANSPORT ADVICE Headway Music Audio Ltd. suggest storing & transporting the EDB-2 in the complete original box or inside a heavy cardboard box in good condition. Always pad it out in order to prevent the unit from shifting in transit.

  • Page 12: Edb-2 Features, Power On & Standby

    NON-Powered Pickups directly into EDB-2 The primary types of pickups include Piezo cable or Co-axial cable pickups (Headway HE4 Passive) or Flexible “Piezo Film” pickups as offered by a number of manufacturers. Most are flexible structure types but some film pickups are encased in rigid metal.
  • Page 13   3.1.3 ACTIVE/LOW: Impedance Input < 50k Ohm This input is optimised for active pickup systems which require battery power. It is also used for some Passive Magnetic/Low Impedance pickups but on passives there will be a treble roll-off and hence a thicker more middle biased sound.

  • Page 14: Interactive 5 Band Eq Section

    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 is set for the instrument type specified.
  • Page 15   BOOST EQ FACILITY: Boost functions only work effectively if there is sufficient of the frequency in order to be able to increase it. For critical applications, EQ is generally thought to sound better where cut rather than boosted. Most importantly with EQ is to use your ears! 3.2.1 BASS Control: +/- 12dB centred broadly @ 120Hz or +/- 16dB @ 45Hz Allows control of the bass at the lowest frequency of the audio spectrum and will over-lap a little tonally with LO MID control.
  • Page 16 Overall 5 Band EQ can be switched to both channels combined or to either channel separately. EDB-2 may operate a dual system by applying 5 Band EQ to one channel (or both channels) and notch filter to the other channel.
  • Page 17 Channel 1. For live performances when using Mics you should use Uni-directional Mics such as Cardiod and especially Hyper-Cardiod Polar Patterns. The EDB-2 was NOT primarily intended to be used for two totally separate sources such as Guitar + Vocals since you will normally require different settings of EQ.
  • Page 18 Mic holder. External Mics will still be very prone to feedback than most pickups but at least they should sound better than internal Mics. Headway's Co-axial Piezo Cable Under Saddle pickups offer a more natural sound than flat pickups since they sense around 360 degrees.

  • Page 19: Channel 2

    Headway Music Audio Ltd. will NOT accept requests for information on other manufacturers wiring or specifications. Headway Music Audio Ltd. will not be held liable for damage to other manufacturers pickup systems from Phantom Power. The Ring Position suits more typical pickup systems where wired for Phantom.

  • Page 20: Phantom Power 18V

    18v Phantom Power to XLR will operate most Condenser Mics at above minimum voltage requirements. To date only SE Mics have been identified as NOT operating. If powering Condenser Mics or other devices from EDB-2 note low battery LED. Powering Constraints: It is NOT possible to power the EDB-2 via Phantom Power from a Mixer.
  • Page 21   6.2 NOTCH Frequency Knob: 50Hz - 6kHz Sets the approximate centre frequency from 50 Hz (low bass) - 6kHz (treble) where notch cut applies. 6.3 Notch Filter Switches i) Slider Switch determines whether the notch filter is in or out. This enables you to determine whether you like the application on or off without altering settings.

  • Page 22: Master Volume Control

    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 &...

  • Page 23: Battery Powering

      ii) Violin: Cuts bass and Low Mid frequencies significantly below 200 Hz. This setting also applies to similar smaller, high pitched instruments such as Mandolin and Ukulele. iii) Bass: Cuts gently below 40 Hz. This setting applies to all instruments producing bass such as Double Bass.

  • Page 24: Phase Reverse

      Low battery Indicator LED will glow BLUE when battery voltage is around 7.5v and battery is close to being exhausted. EDB-2 will fail within a few hours of use or when battery voltage falls below 7v each. 10 PHASE REVERSE – 3 Way Slider Switch: "Phase" Setting denotes IN Phase.
  • Page 25   11.2.2 CH. 2 INPUT Input Impedance to Jack via 3 Way Switch: +Hi = >20 Meg Ohms Hi = 5 Meg Ohms Active/Low Impedance = 1 Meg Ohms Post EQ/Routes to MASTER Vol. Input Impedance to XLR: 2kOhms Balanced. Gain Control to Jack: Continuously variable 0 - +32dB.
  • Page 26   11.2.7 PHANTOM POWER XLR Mic Input on Ch. 2: 18v with 6K8 Current Limit Resistors (Pins 2 & 3) Jack Socket Input on Ch.1: 9v with 10 mA Current Limit. 11.2.8 OUTPUTS Line Output via Jack: Nominal -10 dBu RMS @ 100 Ohms Mix of Ch.1 &...

  • Page 27: Trouble-Shooter Checklist

    Outer = +VE (Positive) /Inner = -VE (Negative) EDB-2 Input DC Plug Dimensions Centre Hole: 2.1mm Diam./Plug Diam: 5.5mm./Plug Length: 10mm Use ONLY Headway Music Audio Ltd. supplied EDB PSU as in 1.1 Headway will NOT honour guarantees where incorrect Power Supplies cause damage.
  • Page 28 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.
  • Page 29 Getting people into an enclosed performance space will soak up a lot of sound reflections and discourage feedback as if MABS or Mobile Acoustic Baffles! Check that a power amp output is not plugged into EDB-2 inputs. 12.2 UNEVEN STRING AMPLIFICATION, HARSH or BOOMY SOUND Under saddle pickups may not be seated correctly and evenly in instrument.
  • Page 30 Use highly screened instrument cables, shorter, uncoiled cable runs and metal shielded jack covers with good solder connections. When using the XLR DI outputs on the EDB-2 set the GND LIFT button to cut earth loop hums if required. AC Mains Filters are useful to stop an impure mains power source affecting your amplifier.

  • Page 31: Specifications

    It is recommended that you use the best quality connectors such as Neutrik, Deltron & Schurter/Rendar, Switchcraft, Horizon, ST Professional & GH. If EDB-2 has somehow become overheated, turn off, cool it down and try turning on a little later to re-start checking batteries & IN signals. 12.6 PERSISTENT PROBLEMS...
  • Page 32 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 Under Saddle Pickup System for Acoustic Guitar &...
  • Page 33 We recommend that to get the best possible sound 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.
  • Page 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       34 ...

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