A PRE 500®
Contents
1. and guidelines for use Do not attempt to modify or change the A PRE 500 as this could void the regulatory compliance which would place you at risk of losing your authority to operate the A PRE 500 WARNING Do not place objects on top of this unit if they weigh more than 10 pounds PAGE 2 ESSA a DWV ENTERTAINMENT company SAFETY DECLARATIONS This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular instal lation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment and receiver 3 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected 4 Consult the dealer or an experienced radio TV technician for help CE fe PAGE 3 TABL2. 120dB lt 0 003 4dBu out10Hz 22kHz 0 125dBu max gain CONNECTOR PINOUT O ON DH KRW NY gt aie ae Ce a nan A N a O CHASSIS GROUND OUTPUT 4 LEVEL unused OUTPUT 4 LEVEL COMMON unused unused INPUT 4 LEVEL unused INPUT 4 LEVEL unused 16VDC POWER SUPPLY COMMON 16VDC unused a DWV ENTERTAINMENT company 3500 N San Fernando Blvd Burbank CA 91505 USA PH 818 767 2929 FAX 818 767 2641 www APHEX com PAGE 11
3. APHSe x A PRE 500 TRANSFORMER COUPLED MIC PRE 500 SERIES MODULE APHEX A PRE 6 i N N C lt 1 W 6 24 PK LEVEL 6 7 16 INSTRUMENT OWNER S MANUAL a DWV ENTERTAINMENT company SAFETY DECLARATIONS TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE SHOCK HAZARD REFER SERVICING TO QUALIFIED PERSONNEL ONLY DO NOT OPEN ATTENTION AFIN DEVITER DES CHOCS ELECTRIQUES N ENLEVEZ PAS LE COUVERCLE IL N Y A AUCUNE AVIS RISQUE DE CHOC ELECTRIQUE PIEC S D ENTRETIEN L INT RIEUR R F REZ LES NE PAS OUVIR R PARACIONES UNE PERSONNE QUALIF E CAUTION For continued protection against risk of fire replace only with the same type and rating of fuse ATTENTION pour une protection continue contre les risques d incendie ne remplacer qu avec la m me valeur et m me type de fusible WARNING Do not place objects containing liquid on this unit as it is not designed to protect against spillage Do not expose this unit to dripping or splashing of liquids as the unit is not designed to protect against these occurrences WARNING This unit must be connected to a mains socket outlet with a protective earthing connection WARNING The A PRE 500 has been tested and meets the FCC CE and European Union rules regulations
4. E OF CONTENTS 1 0 INSTALLING THE A PRE 500 IN A 500 SERIES RACK 1 0 INSTALLATION 1 Turn off and unplug your 500 series rack frame Inspect the card slot you intend you use to make sure that it is clean and 2 0 INTRODUCTION free of any debris 3 0 CONTROLS AND INDICATORS 3 1 Trim Control 3 2 Input Meter 3 3 Output Level Switch 3 4 26dB Pad 3 5 Phase 3 6 75Hz High Pass Filter 3 7 48V Phantom Power 3 8 Instrument Input 2 Before removing your A PRE 500 from its box discharge any static electricity buildup you may have by touching your 500 series rack 3 Pull your A PRE 500 module out of its box and carefully slide it into place in the designated opening Sight down the back of the module use a flashlight if necessary and ensure the card edge connector is aligned to seat into the card slot of the frame CON NNN DDO 4 0 WARRANTY AND SERVICE 4 Firmly and evenly push the A PRE 500 module into place until 4 1 Limited Warranty it is positively seated in the card slot 4 2 Service Information 5 Use the 2 thumb screws in the module to mount the A PRE 5 0 CONTACT INFO 500 front panel to the 500 series rack These screws have a pretty tight fit please be careful not to cross thread 6 Plug your 500 series rack back into the AC source and power up your rack Your A PRE 500 will automatically power up with your 500 series rack PAGE 4 ESEA a DWV ENTERTAINMENT company PAGE 5 2 0 INTRODUCTION The A PRE 500 mic pre uses a custo
5. Hz It s a good idea to use the HPF when recording voices or instruments that don t have much low frequency content Only capturing the relevant frequencies will provide a cleaner mix later on INSTRUMENT 3 7 48V PHANTOM POWER Condenser microphones require power to function Some times a microphone will use internal batteries but usually the required power is provided by the mic pre Turning on the Phantom Power will send power down through the cable to power the microphone Be careful though as ribbon micro phones and some older dynamic microphones can be dam aged or destroyed by phantom power ESSA a DWV ENTERTAINMENT company PAGE 7 4 0 SERVICE amp WARRANTY 4 1 LIMITED WARRANTY 3 8 INSTRUMENT INPUT The A PRE 500 provides a 1 4 10 MOhm instrument input When an instrument is PERIOD plugged in to this input it will override the XLR One year from date of purchase input on the receiving frame This input makes it easy to record guitar and bass tracks with the SCOPE A PRE 500 All defects in workmanship and materials The following are not covered a Voltage conversions b Units on which the serial number has been defaced modified or removed c Damage or deterioration 1 Resulting from installation and or removal of the unit 2 Resulting from accident misuse abuse neglect unauthorized product modification or failure to follow instructions contained in the User s Manual 3 Resulting from repair or
6. SERVICE INFORMATION If it becomes necessary to return this unit for repair you must first contact Aphex for a Return Authorization RMA number which will need to be included with your shipment for proper identification If available repack this unit in its original carton and packing material Otherwise pack the equipment in a strong carton containing at least 2 inches of padding on all sides Be sure the unit cannot shift around inside the carton Include a letter explaining the symptoms and or defect s Be sure to reference the RMA number in your letter and mark the RMA number on the outside of the carton If you believe the problem should be covered under the terms of the warranty you must also include proof of purchase Insure your shipment and send it to APHEX 3500 N San Fernando Blvd Burbank CA 91505 USA PH 818 767 2929 FAX 818 767 2641 Type Impedance Instrument Imdedance CMRR Gain Range Pad Max Input Level Limiter off Low Cut OUTPUT Type Nominal Level Maximum Level Meter 008 Impedance AUDIO Frequency Response Dynamic Range THD EIN POWER Current draw PAGE 10 6 0 SPECIFICATIONS Aphex Custom Transformer 1300 ohm nominal 10M ohm nominal gt 90dB 60Hz 30dB to 70dB no pad 24 level 26dB 3dBu no pad 23dBu pad 2nd order 3dB 75Hz Transformer balanced Jensen JT 11 DL 4dBu 24 20 16 dBu switchable 100 ohm nominal 1 dB lt 10Hz to 100kHz
7. attempted repair by anyone not authorized by Aphex 4 Occurring from shipping claims must be presented to shipper 6 da N nN N 5 TRIM WHO IS PROTECTED aes 0 This warranty will be enforceable by the original purchaser and by any subsequent ia owner s during the warranty period so long as a copy of the original Bill of Sale is submitted whenever warranty service is required WHAT WE WILL PAY FOR We will pay for all labor and material expenses for covered items We will pay return shipping charges if the repairs are covered by the warranty INSTRUMENT LIMITATION OF WARRANTY No warranty is made either expressed or implied as to the merchantability and fitness for any particular purpose Any and all warranties are limited to the duration of the warranty stated above EXCLUSION OF CERTAIN DAMAGES Aphexs liability for any defective unit is limited to the repair or replacement of said unit at our option and shall not include damages of any other kind whether incidental consequential or otherwise Some States do not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limitations and exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from State to State PAGE 8 ESEA a DWV ENTERTAINMENT company PAGE 9 4 2
8. m designed CineMag input transformer and a Jensen JT 11DL nickel output transformer This provides the cleanest possible balanced output signal INSTRUMENT PAGE 6 3 0 CONTROLS amp INDICATORS 3 1 TRIM CONTROL The Trim control boosts the input signal from 26dB to 6503 3 2 INPUT METER This 20 segment input meter provides visual confirmation of the input signal level The top three LEDs of the meter are red When the input signal reaches the top red LED the input signal wil clip 3 3 OUTPUT LEVEL SWITCH The output level can be set to 16dB 20dB and 24dB You will need to know the maxi mum input level of the next device in the audio chain to set this properly Most profes sional audio devices can handle a 24db input signal without issue However some inexpensive computer audio interfaces have a maximum input level of only 4dB Many audio devices also offer a 20dB pad to address these kind of issues 3 4 26dB PAD APHEX A PRE x Soo When the input signal is clipping the preamp with the input trim control turned all the way down the 26dB pad can be engaged to solve the problem 3 5 PHASE The Phase button will invert the input signal 180 degrees Using two microphones on the same source can cause phase problems Reversing the phase of one of the microphone signals will often clear up the problem 3 6 75Hz HIGH PASS FILTER Engaging the 75Hz HPF will roll off all the freqencies below 75
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