Rane MA3 Operator's Manual
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Table of Contents
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Summary of Contents for Rane MA3
- Page 1 MULTICHANNEL AMPLIFIER CONTENTS (in order of appearance) Important Safety Instructions MA3 Manual MA3 Data Sheet MT6 Data Sheet Constant-Voltage Audio Distribution Systems Sound System Interconnection MA3 Schematics Warranty 22472...
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Page 2: Important Safety Instructions
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. CAUTION: Changes or modifications not expressly approved by Rane Corporation could void the user's authority to operate the equipment. CAN ICES-3 (B)/NMB-3(B) -
Page 3: Instructions De Sécurité
• Consulter un revendeur ou un technicien radio / TV expérimenté. ATTENTION: Les changements ou modifications non expressément approuvés par Rane Corporation peuvent annuler l'autorité de l'utilisateur à manipuler cet équipement et rendre ainsi nulles toutes les conditions de garantie. -
Page 4: Quick Start
Driving the MA3 from a balanced source is recommended. • Twist the strands together. If you must drive the MA3 Input with an unbalanced source, we • Fully insert the wire into the Euroblock connector. recommend using a cable that has two conductors plus a shield, •... -
Page 5: Front Panel Description
0 dB remaining is indicated by a red indicator. When lit, any additional signal causes the Limiter to operate. It is possible to “com- press” the signal as much as 20 dB with very little effect on sound quality. This gives the MA3 the overload characteristics of a much larger amplifier, without the use of external compressors. -
Page 6: Rear Panel Description
Driving the MA3 from a balanced source is recommended. If you must drive the MA3 Input with an unbalanced source, use a cable that has two conductors plus a shield. Connect the (+) or “hot” source to the MA3 (+) Input, the ground to the MA3 (–) Input and connect the shield to the MA3 shield input. - Page 7 DISTRIBUTED DISTRIBUTED ZONE 2 ZONE 1 ZONE 3 The MA3 is shipped with the internal 80 Hz High- pass filters in the bypassed position. ©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 TEL 425-355-6000 FAX 425-347-7757 WEB rane.com Manual-4...
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Page 8: Data Sheet
The MA3 is an ideal amplifier with Rane’s paging and music Fast-response limiters allow the MA3 to tolerate up to 20 dB of products, the Rane CP52S, CP64S, CP66 and DA26S. overdrive into 8Ω and 4Ω loads while holding THD below 1%. -
Page 9: Features And Specifications
MULTICHANNEL AMPLIFIER Features and Specifications Parameter Specification Limit Units Conditions/Comments Euroblock Connector Input: Impedance min. Ω Each leg Maximum Input Level min. Sensitivity Off to 0 Input required for full power; 8Ω min. 20 Hz to 20 kHz Highpass Filter 80 Hz (factory default is “off”) ±2.5% Hz 2nd-order butterworth... -
Page 10: Block Diagram
MA3 in a rack. The high efficiency “heat tunnel” design allows the amplifier to process severely compressed signals reliably even load. The MA3 can compress a signal with 9 dB of dynamic power range down to a signal with 3 dB of dynamic power without loss when installed in a rack with elevated ambient temperatures. -
Page 11: Rear Panel
UL listed and cUL certified. The unit shall be a Rane Corporation model MA3. ©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB rane.com Data Sheet-4 All features & specifications subject to change without notice. 11-2014... - Page 12 • Four insulated crimp-on male tabs • Four wire nuts • Two mounting screws and nuts for the MT6 plate. For applications, see the RaneNote “Constant-Voltage Audio Distribution Systems: 25, 70.7 & 100 Volts.” available at rane. com. Rear Panel MT6 Specifications...
- Page 13 WARNING: This product may contain chemicals known to the State of California to cause cancer, or birth defects or other reproductive harm. ©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB rane.com All features & specifications subject to change without notice. PN 16910...
- Page 14 • Volume control by transformer tap at the loudspeak- Paul Mathews Rane Corporation er end is more efficient than resistive pads. RaneNote 159 © 2005 Rane Corporation Distribution Transformers-...
- Page 15 TURNS RATIO: Finding It on the Datasheet Transformers at the Power Amp End Boosting the Output Voltage Turns ratio does not show up on many datasheets, Solid state power amplifiers usually need a volt- but you can usually calculate it from other specifica- age boost to get to the 70.7 volt and 100 volt levels of tions.
- Page 16 What Happens When a Transformer Saturates? is what happens when the applied voltage polarity re- Transformers transfer power from winding to wind- mains the same for too long. ing by coupling through mutual magnetic fields. This Saturation has nothing to do with power delivery: transfer of power is amazingly efficient, and it happens the onset of saturation depends only on the with or without a core.
- Page 17 The Sound of Saturation observe an abrupt increase in resistor voltage, indica- When power amplifiers suddenly finds itself having tive of the onset of saturation. Change the drive volt- to deliver massive amounts of current, most will pro- age and repeat the sweep. You should be able to derive tect themselves by throttling back their output voltage.
- Page 18 What About Insertion Loss? allocated to it. This is why most HV loudspeaker mod- Insertion loss seems to be a mandatory specification ules include a series capacitor to reduce the likelihood of transformer saturation. Note, however, that these for distribution transformers, although we find it diffi- cult to understand why.
- Page 19 3. Toroids versus E-cores: details are more important than shape. 4. Transformer isolation: can improve safety and eliminate ground loops. ©Rane Corporation 080 7th Ave. W., Mukilteo WA 987-098 USA TEL --000 FAX -7-777 WEB www.rane.com Distribution Transformers- DOC 108874...
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Page 20: Sound System Interconnection
—Grounding and EMC practices — Shields of connectors in audio equipment containing active circuitry.” Rane’s policy is to accommodate rather than dic- tate. However, this document contains suggestions for external wiring changes that should ideally only be implemented by trained technical personnel. Safety... -
Page 21: Balanced Outputs
Ground Loops Almost all cases of noise can be traced directly to improperly, thus creating balanced equipment that is ground loops, grounding or lack thereof. It is important not immune to the cabling’s noise currents. This is one to understand the mechanism that causes grounding reason for the bad reputation sometimes given to bal- noise in order to effectively eliminate it. - Page 22 Well, some does, and since 1993, A balanced line requires three separate conduc- more of it does. That’s when Rane started manufac- tors, two of which are signal (+ and –) and one shield turing some of its products with balanced inputs and (see Figure 1a).
- Page 23 Another way to create the necessary isolation is to RF issues exist, though the increasing use of digital and use a direct box. Originally named for its use to convert wireless technology greatly increases the possibility of the high impedance, high level output of an electric future RF problems.
- Page 24 Convention of Audio Engineering Society in San Fran- ground using a star washer for a reliable contact. cisco, CA, Nov. 1994. (Rane always provides this chassis point as an exter- 2. Grounding, Shielding, and Interconnections in Analog nal screw with a toothed washer.) Any device with &...
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Page 25: Cable Connectors
To Input CABLE CONNECTORS MALE ¼" BALANCED ¼" OR 3.5mm UNBALANCED RCA BALANCED BALANCED XLR TRS (TIP-RING-SLEEVE) UNBALANCED EUROBLOCK TS (TIP-SLEEVE) FEMALE BALANCED XLR – – (NOT A TRANSFORMER, SHIELD NC NOR A CROSS-COUPLED OUTPUT STAGE) – – FEMALE BALANCED XLR (EITHER A TRANSFORMER SHIELD NC OR A CROSS-COUPLED... - Page 26 MALE FEMALE 1=SHIELD 1=NC 2-CONDUCTOR SHIELDED CABLE 2=RED BLACK BLACK 2=RED 3=BLACK SHIELD 3=BLACK FEMALE T=RED 1=SHIELD 2=RED BLACK R=BLACK BLACK 2-CONDUCTOR SHIELDED CABLE S=NC 3=BLACK SHIELD FEMALE 1=SHIELD T=RED 1-CONDUCTOR SHIELDED CABLE 2=RED 3=NC SHIELD SHIELD S=SHIELD FEMALE 1=SHIELD 2=RED 1-CONDUCTOR SHIELDED CABLE T=RED...
- Page 27 S=BLACK SHIELD CROSS-COUPLED OUTPUT ONLY: CONNECT BLACK TO SHIELD AT THIS END AND SET GROUND LIFT SWITCH TO ‘GROUNDED’ (IF PRESENT). ©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5000 USA TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com Interconnection-8 DOC 102907...
- Page 30 F F C...
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Page 31: Declaration Of Conformity
EMC directive in the event that the equipment is modified without writ- ten consent of the manufacturer. This declaration of conformity is issued under the sole responsibility of Rane Corporation. Type of Equipment:... - Page 32 MULTICHANNEL AMPLIFIER...
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