Summary of Contents for Prism Sound MASELEC MASTER MEA-2
- Page 1 MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer Operation Manual Issue 1.2 17 January 2000...
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Page 2: Table Of Contents
Unpacking your MEA-2 ........5... - Page 3 Issue 1.1; 8 January 1998 Issue 1.2; 17 January 2000 Detail changes only; email addr; Layout; Product Revision History This manual is for use with MEA-2 units having serial numbers beginning with ‘4' (or higher number) thus : MEA-2-4-xx-xxxx Issue 1.2 ©...
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Page 4: Introduction
The MEA-2 Precision Stereo Equalizer is intended for professional audio use in recording, mixing and mastering applications where high performance is required. The MEA-2 provides a unique set of tools, carefully crafted to provide an equalizer whose sonic character was the most important design objective. -
Page 5: Getting Started
Connect the output of the MEA-2 to a monitoring system or to a tape recorder input. Connect the mains supply to the MEA-2 unit. There is a main power switch on the rear of the unit and an auxiliary switch on the front which is more convenient to use if the equipment is rack mounted and the rear panel is inaccessible. -
Page 6: Mea-2 Product Concept And Capabilities
MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer Switch the secondary power switch on the front of the MEA-2 to 'ON'. Press and release the 'In/Out' push buttons for the left and right channels on the front of the unit. When the equalizer for each channel is in-circuit, the button will be illuminated a soft green colour. -
Page 7: Operation
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer OPERATION The unit is designed for either stereo or 2-channel operation and each channel is controlled independently by an identical set of controls. Each channel has four equalizer sections, denoted in this manual as LF1, LF2, HF1 &... -
Page 8: Shelf/Bandwidth And Boost/Cut Settings
The numerical bandwidth settings relate to the Q factor or sharpness of the peaking filters. As a result of the asymmetric shape of the MEA-2 Equalizer curves it becomes difficult to define Q factor in a meaningful way. These settings should therefore be regarded as indicating the relative bandwidths with 4 being the broadest and 20 the narrowest. -
Page 9: Frequency Selections By Eq Band
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 4.2. Frequency selections by Eq band LF1 (Hz) LF2 (Hz) HF1 (Hz) HF2 (Hz) Issue 1.2 © Prism Media Products Limited 17 January 2000 Page 9 of 20... -
Page 10: Connectors
Note: When interfacing to other devices such as A/D and D/A converters it may be necessary to check the manufacturers polarity convention if the correct absolute phase is to be maintained. However, this does not affect use of the MEA-2 with either polarity convention. -
Page 11: Output Connections
Using the above method for driving unbalanced loads should provide best results. It employs ‘Ground Loop Compensation’ and the signal level remains unchanged compared to balanced operation. Note: When driving unbalanced loads with the MEA-2 the maximum output level is reduced by approximately 6dB from the nominal +28dBu. Issue 1.2 ©... -
Page 12: Rear Panel Connectors
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 5.3. Rear panel connectors A. Audio I/O Left Channel Input Left Channel Output Right Channel Input Right Channel Output B. Earthing Stud - Link to a good-quality ground connection by the most direct route. -
Page 13: Performance Specification
The mains transformer has a tapped primary to allow operation at nominal voltages of 120V or 240V. A rear-panel slide switch selects the mains voltage range. Ensure that the correct voltage range is selected before using the MEA-2. 6.5.1. Mains voltage range : 90-130V (nominally 120V) or 180-260V (nominally 240V) operation. -
Page 14: Fuse
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 6.6. Fuse There is one mains fuse, accessible externally in the IEC320 mains inlet. If this fuse is blown it should be replaced by an identical value and type. (20x5mm 250V 315mAT (anti-surge, slow)). -
Page 15: Equalizer Response Curves
MEA-2 Precision Stereo Equalizer EQUALIZER RESPONSE CURVES The following plots are samples of the responses of the MEA-2 equalizer. All section types are represented, but for brevity only a small selection of the total number of possible settings are included. -
Page 16: Range Of Frequency For +8Db Shelf On Lf1
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 7.3. Range of frequency for +8dB shelf on LF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 7.4. Range of bandwidths for +8dB 530Hz bell on LF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 Issue 1.2... -
Page 17: Range Of Bandwidth And Shelf Curve At 435Hz On Lf1
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 7.5. Range of bandwidth and shelf curve at 435Hz on LF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 7.6. Range of bandwidth and shelf curve at 108Hz on LF2... -
Page 18: Range Of Boost/Cut For 617Hz Shelf On Hf1
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 7.7. Range of boost/cut for 617Hz shelf on HF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 7.8. Range of boost/cut for 3300Hz shelf on HF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 Issue 1.2... -
Page 19: Range Of Bandwidth Plus Shelf Curve At 617Hz On Hf1
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer 7.9. Range of bandwidth plus shelf curve at 617Hz on HF1 AUDIO PRECISION MEA_2GB1 09 JUN 97 13:35:04 7.10. Range of bandwidth plus shelf curve at 9000Hz on HF1... -
Page 20: January 2000
Prism Media Products Limited Operation Manual MASELEC MASTER SERIES MEA-2 Precision Stereo Equalizer ELECTROMAGNETIC COMPATIBILITY This equipment is intended for use in an electromagnetically controlled environment. To maintain the performance specification it should not be subject to strong magnetic fields (such as in the immediate vicinity of a power amplifier or cathode ray tube) and all connections should be terminated as described below.