Tech 21 Acoustic DI Musical Instrument Amplifier User Manual
Contents
1. It is specifically engineered to yield a smooth even response as would be achieved by a properly miked acoustic guitar 5 SAMPLE SETTINGS other eo P M OO BASS GUITAR e o BASS GUITAR hard driven 5 o e oe we oF ELECTRIC GUITAR semi dirty oe ow eo e NI GO 3 SPEAKER MIC SIMULATOR SAMPLE SETTINGS for acoustic guitars 0 gg X x we FOLK COUNTRY NOTE Sample settings are provided as a starting point As acoustic guitar designs vary greatly controls may have to be adjusted accordingly CUSTOM SETTINGS CUSTOM SETTINGS gs oo2. Refer to the Sample Setting for Electric Guitar By taking the time to familiarize yourself with how the EQ controls interact you will be able to achieve the proper mix of frequencies that best suits your needs in any venue 2 The noise level of SansAmp Acoustic DI is exceptionally low However it may amplify noise emanating from the input source To minimize noise going into SansAmp Acoustic DI we recommend active electronic instru ments have the volume set at unity gain maximum and tone controls posi tioned flat If you need to boost do so slowly and sparingly 3 Compressors or limiters may not be necessary Our unique circuitry emulates the warm natural gentle compression of tubes This limits transient peaks for an even meter reading so that outboard units typically aren t needed 4 Using effects One of the key attributes of SansAmp is the responsive ness to the dynamics and nuances of your playing technique Therefore your guitar should be plugged directly into SansAmp and effects should be placed after With an amp use 1 4 Output to effect to amp With XLR place effect in effect loop of SansAmp Acoustic DI see page 3 If however you prefer to place an effect before SansAmp be sure to set the output level of the effect at unity gain with the output level of the instrument 6 GUIDE TO CONTROLS BASS amp TREBLE Unlike passive controls that can only cut these active tone controls cut or boost 208
3. POWER REQUIREMENTS Operable with phantom power supply minimum 24V DC however 48V DC is recommended Utilizes standard 9V alkaline battery not included NOTE The Input jack activates battery To conserve energy unplug when not in use Power Consumption approx 7mA USE DC POWER SUPPLY ONLY Failure to do so may damage the unit and void warranty DC Power Supply Specifications 9V DC regulated or unregulated minimum 2 mm female plug center negative Optional factory power supply is available Tech 21 Model DC2 WARNINGS Attempting to repair unit is not recommended and may void warranty Missing or altered serial numbers automatically void warranty For your own protection be sure serial number labels on the unit s back plate and exterior box are intact and return your warranty registration card ONE YEAR LIMITED WARRANTY PROOF OF PURCHASE REQUIRED Manufacturer warrants unit to be free from defects in materials and workmanship for one 1 year from date of purchase This warranty does not include damage resulting from accident misuse abuse alteration or incor rect current or voltage If unit becomes defective within warranty period Tech 21 will elect to repair or replace it free of charge After warranty expires Tech 21 will repair defective unit for a fee ALL REPAIRS for residents of U S and Canada Call Tech 21 for Return Authorization Number Manufacturer will not accept packages without p
4. from unity gain at 2 o clock MID SHIFT amp MID These sweepable semi parametric EQ controls range from 170 Hz to 3 5 kHz 16dB respectively With the Mid Shift control you can select the center fre quency of the mid range control MID This in turn enables you to notch out any specific frequencies that may be causing your guitar to feed back To find the feedback frequency of your guitar set MID at maximum boost 5 o clock Turn Mid Shift to the feedback point and leave it there Then cut the MID control until the feedback stops If you set Mid Shift at kHz Mid operates as a traditional mid range control BLEND Allows you to blend the direct instrument signal with SansAmp Tube Micro phone Emulation circuitry In most cases you will probably have this set at max imum 10076 SansAmp If you should want to hear some of the distinct timbre of a piezo pickup or reduce the amount of compression you can simply adjust accordingly by turning the Blend control counter clockwise At minimum the SansAmp circuitry is bypassed However all the other controls remain active The unit then functions as a standard DI with EQ LEVEL Adjusts the output level TUBE MIC EMULATION Tube Microphone Emulation is an integral part of the SansAmp Acoustic DI s circuitry The tube emulation yields a warm gentle saturation to limit dynamic peaks while the microphone emulation removes the unnatural harmonics associated with piezo pickups
5. is not available use the cleanest channel with the amp s EQ flat and maximum headroom For best results keep the Level control of SansAmp Acoustic DI close to unity gain so as not to overload the amp s input which could yield undesirable distortion WITH OTHER INSTRUMENTS SansAmp Acoustic DI can be used with electric and bass guitars and upright bass as well as drums sax harmonica and even vocals But don t stop here Try your own experimentation WITHOUT INSTRUMENTS Insert SansAmp Acoustic DI in your mixing board and use it as an outboard processor to warm up a particular channel Put direct in line from the microphone to the mixer Enhance existing tracks in the mix down process Use as a speaker mic simulator to record your favorite effects stomp boxes directly see Sample Settings PRODUCT OVERVIEW Tech 21 redefined the term direct box with the development of SansAmp Bass DI and again with SansAmp Bass Driver DI For recording and live performances our exclusive Tube Amplifier Emulation circuitry delivers the sound of a miked up bass amp system in a convenient direct box format We have now adapted our proprietary technology specifically for the acoustic guitar player whose seemingly simplistic desire to just put a good quality microphone in front of an acoustic guitar is foiled by feedback or unbalanced sound Piezo pickups have helped but their characteristic high frequencies tend to sound artificial and abras
6. ive With SansAmp Acoustic DI the parametric equalizer the Mid Shift con trol removes unwanted feedback The Tube Microphone Emulation circuit ry engaged via the Blend control eliminates the unnatural harmonics of piezo pickups SansAmp Acoustic DI gives your acoustic guitar a natural warmth and presence as if you were miking the guitar through a tube pre amp SansAmp Acoustic DI also functions as a standard direct box with EQ when the Blend control is at minimum In bypass inactive SansAmp Acoustic DI functions solely as a standard transparent direct box As with each SansAmp model the controls are designed to give you the flexibility to achieve your desired sound be it at home in a local bistro or on a world tour SansAmp Acoustic DI Consistent quality sound studio to studio club to club arena to arena ACTIVE SWITCH Active LED will be on All controls will respond to their settings Inactive LED will be off and SansAmp Acoustic DI is in bypass mode It then functions as a transparent direct box and will not sonically alter the instrument signal 20dB PAD Attenuates the volume of the XLR Output between 0 and 20dB If you re using a mixer with a mic level input be sure to pad at 20dB so as not to overdrive the input To obtain a better signal to noise ratio use the OdB position Just be sure your mixer can accept a line level OdB signal input not all can PHANTOM amp GROUND CONNECT SWITCH When engaged
7. rior authorization pre paid freight UPS preferred and proper insurance FOR PERSONAL ASSISTANCE amp SERVICE Contact Tech 21 Inc any weekday from 10 00 AM to 6 00 PM EST MADE IN THE U S A TECH 21 NYC 333 West 52nd Street NY New York 10019 212 315 1116 Fax 212 315 0825 www tech2I nyc com o z E ACOUSTIC DI TECH 21 NYC 0 2 lt 0 e q 0 APPLICATIONS WITH ACOUSTIC GUITAR Direct to the mixing console of a recorder or a P A system For live and studio use you can plug the XLR Output or 1 4 Output directly into the input of a mixer recorder Work with the input trim control on the mixer recorder and be sure not to overload its input Additionally bear in mind that full range systems yield a wide frequency response Therefore we suggest you start with the EQ levels at 12 o clock and increase decrease to taste With a conventional acoustic guitar amplifier To enhance your acoustic amplifier with a more natural sound run the 1 4 Output into the front input of your amp For best results keep the Level control of SansAmp Acoustic DI close to unity gain so as not to overload the amp s input which could yield undesirable distortion With a conventional electric guitar amplifier To expand the capabili ties of your electric amp run the 1 4 Output into the power amp input a k a effects return if available of the amp This will bypass the tone coloring pre amp section If a power amp input
8. rough the XLR Output This input bypasses all the circuitry which enables the unit to be used as a standard transparent DI You can also create an effect loop by utilizing this input as an Effect Return in conjunction with the 1 4 Output See illustration below 1 4 OUTPUT Effect Send Unbalanced low Z output Sends signal to your amp or power amp It can also be used with a home recorder should an XLR input not be available Also functions as an Effects Send when utilized in conjunction with the Input to XLR See illustration below BALANCED XLR OUTPUT Balanced low Z output sends signal to mixing console recorder Switchable between 0 and 20dB by using the 20 dB Pad switch Also accepts phantom power see page 4 EFFECT LOOP HOOK UP pco y OUTPUT INPUT OUTPUT QO Ned 9 INPUT NO INPUT TO XLR TO 4 Acoustic D1 MIXER XLR UEST ENS YS OUTPUT NOTEWORTHY NOTES amp CONSIDERATIONS 1 SansAmp Acoustic DI is very responsive Our controls are unusually sensitive and you need not set everything at max to get maximum results For instance to brighten your sound restrain yourself from automatically boosting Treble all the way up Try cutting back on the Bass first Be aware that boosting Treble and Bass increases the high and low frequency content without changing the gain structure However boosting the Mid and the Mid Shift controls will increase the amount of saturation
9. the ground connects and unit will accept phantom power through the XLR Output Disengaged the ground of your stage system and other interconnected gear is lifted isolated from the ground of the mixing console PHANTOM POWER OPERABILIT Y eliminates the need for an external power supply If you are using a suitably equipped mixer consult its owner s manual for set up instructions For live and studio use let the engineer know your SansAmp Acoustic DI is phantom power operable NOTE When lifting the ground phantom power disconnects and battery if installed becomes activated While operating under phantom power we recommend keeping a 9V alkaline battery installed at all times to avoid the previously mentioned pops when lifting the ground see page 3 THE INS AND OUTS TURN ON FIRST TURN OFF LAST To avoid unwanted and potentially speaker damaging pops when connecting or disconnecting any equipment follow Standard Audio Procedures Always mute mixing board and or turn down amp volume before plugging or unplugging INPUT 1 4 4 7megOhm instrument level The unusually high impedance was designed with piezo pickups in mind to provide maximum output and dynamics Switches battery power on off To avoid battery drain unplug when unit is not in use AND DON T FORGET TO MUTE INPUT TO XLR Effect Return This triple function 1 4 input con verts a high impedance instrument signal to a low impedance balanced line th
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