LIMITING HI +10 0 MIN 0 MAX kHz LIMIT kHz -12 dB RELEASE +12 NCY c -6 o dB OUTPUT GAIN +4 r e c o FAST DIRECT OUT 1 INSERT JACK TIP: SEND RING: RETURN SLEEVE: GROUND INSERT GR OWNER’S MANUAL MAIN OUT 2 EQ TUBE STAGE O/P 2 O/P 1 LIMITER MAX e REFERENCE CHANNEL STR REFERENCE CHANNEL STRIP SLOW r OUTPUT GAIN FET BRICKWALL LIMITER DIRECT OUTPUT (1) c o r e REFERENCE CHANNEL STRIP LINE INPUT MIC INPUT XLR PINOUT PIN1: SHIELD/GROUND PIN2: HOT/POSITIVE P PIN3: LOW/NEG
Contents CHAPTER i) c 1 o r e PAGE Introduction 2 ii) Manual Conventions 2 1. Important Safety Instructions 3 2. Getting Started 3 3. Front Panel 4 4. Input Section 4 5. Optical Compressor 5 6. Equalizer 5 7. Limiter 6 8. VU Meter 6 9. Rear Panel 7-8 10. Rear Panel Connections 9 11. Operational Notes 9 12. Questions 10 13. Copyright Notice 10 14. Servicing 11 15. Core Calibration Procedure 11-12 16. Curves & Specifications 13 17.
i) An Introduction To The Manley Core Reference Channel Strip Thank you for selecting the Manley CORE. This unit combines a high quality vacuum tube MIC Pre, an ELOP® Compressor as found in our VOXBOX ®, an EQ section and a fast FET Brickwall Limiter. Musical. Flexible. Forgiving. These three concepts were my main goals in designing the CORE channel strip. To give the musician tools he or she really needs, without needless complication.
1. Important Safety Instructions 1. Water and Moisture – Do not use The CORE near any source of water or in excessively moist environments. 2. Object and Liquid Entry – Care should be taken so that objects do not fall, and liquids are not spilled, into the enclosure through the openings. 3. Heat & Ventilation – When installing The CORE in a rack or any other location, be sure there is adequate ventilation. Improper ventilation will cause overheating, and can damage the unit.
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5. ELOP® Compressor ® The ELOP Compressor utilizes our famous circuit topology as ® ® found in the VOXBOX , and is also similar to the ELOP and SLAM limiters. The COMPRESSION (Threshold) control determines at what level the compressor begins to act. Clockwise rotation makes the compressor reduce the signal. ATTACK COMPRESSION SLOW With the meter in the “GR” position, the amount of gain reduction can be displayed. (Refer to Diagram 6, pg.
. Limiter The FET output limiter is a powerful, high-ratio, peak limiter. It can be used for many creative effects, as well as for setting a maximum output ceiling to avoid overloading the next piece of gear in the chain. The LIMITING controls the amount of limiting. The Limit LED lights when the signal crosses the threshold, and goes off when the signal is both below the threshold and the release time completed. LIMITING MIN The RELEASE controls how FAST or SLOW the limiter returns to full volume.
. Rear Panel Connections From Right to Left: Mic Input: This is a transformer-balanced, microphone preamp input. The pinout is PIN 1:Ground, PIN 2: HOT (+), PIN 3:COLD(-). ! All pins must be driven. DO NOT “float” PIN 2 or PIN 3. Line Input: An electronically-balanced, line-level input. The pinout is PIN 1:Ground, PIN 2: HOT (+), PIN 3:COLD(-). An unbalanced source can be connected, PIN2 or 3 can float but NOT ground.
12. Questions “Where's the -20dB pad switch?” Because the input attenuator precedes the tube gain stage, the input level control acts as a variable pad. It can be used to either reduce the level of a hot input signal, or to simply set the overall gain of the preamp. “Sometimes I hear distortion in the peak limiter!” To allow maximum creativity, the release time of the limiter was intentionally allowed to operate over a wide range.
14. Servicing TUBE LOCATION 6922 12AX7WA 2A (T) FUSE CALIBRATION TRIM POT LOCATION VR11 VR9 VR6 GR-ZERO GR-METER GR-AUDIO VR15 VR12 LIM CV VR16 Diagram 8 LIM REF V OP1 ZERO VU 15. Core Calibration Procedure The CORE requires calibration for 3 sections of its circuitry: I) - VU METER- Adjust: +4dBu (1.
i) CALIBRATION OF VU METER: 1- Feed a balanced sine tone @ 1 KHz, +4dBu (1.228V RMS) from an audio tone generator/oscillator into the LINE INPUT XLR. 2- Use your audio analyzer and/or, set your voltmeter to read volts AC and put it at the output of XLR “OP1”, and start bringing up the Input level attenuator, until you have +4dBu (1.228V RMS) at the output XLR “OP1”. Same level as the input signal from oscillator (unity gain) 3- Use the VU meter select switch to read “OP1”.
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c o r FLAT LINE 48V LOW PHANTOM HI 0 180 MIC 48V MIC COMPRESSOR SLOW FAST BYPASS FLAT LINE LOW PHANTOM HI 0 180 MIC NOTES COMPRESSOR SLOW FAST BYPASS FAST SONG RELEASE MAX IN INSTRUMENT / TRACK MIN SLOW ARTIST DIRECT IN HANDCRAFTED IN CALIFORNIA USA 120Hz MIC COMPRESSION ATTACK MIC NOTES RELEASE MAX IN FAST SONG MIN SLOW INSTRUMENT / TRACK INPUT LEVEL ATTACK COMPRESSION ARTIST DIRECT IN HANDCRAFTED IN CALIFORNIA USA 120Hz MIC INPUT LEVEL -12 -12 dB
