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MADE
IN THE
USA
9303 / 9505
®
Installation & Operation
PROFESSIONAL POWER AMPLIFIER PROFESSIONAL POWER AMPL
®
trans nova
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NOTICE - IMPORTANT SAFETY INFORMATION The lightning flash with arrowhead symbol within an equilateral triangle CAUTION is intended to alert the user to the presence of uninsulated "dangerous RISK OF ELECTRIC SHOCK voltage" within the product's enclosure, that may be of sufficient magni- DO NOT OPEN ! tude to constitute a risk of electric shock to persons. WARNING: TO PREVENT FIRE OR The exclamation point within an equilateral triangle is intended to alert SHOCK HAZARD, DO NOT EXPOSE THIS ! th
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PERFORMANCE SPECIFICATIONS 9303/9505 Full Power Bandwidth: 0.15Hz to 300kHz Signal-to-Noise: >100dB “A” Weighted Slew Rate: 150 V/µ s CMRR: 75dB at 1kHz Gain: +29dB max. 9303 Power Rating: 150 wpc @8 Ω , 225 wpc @ 4Ω , 450 Watts mono @ 8Ω Distortion: 0.07% THD 20-20Hz, Typically 0.005% THD 1kHz, at rated power into 8Ω Damping Factor: 800 (to 1kHz); 80 (to 20kHz); 20 (to 100kHz) into 8Ω Input Sensitivity Range: 1.22 Vrms for 150W into 8Ω , 1.06Vrms for 225W into 4Ω Dimensions: 19"W x 12-1/2"D x 3
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TABLE OF CONTENTS SAFETY PRECAUTIONS ........................................................................................................................................... i PERFORMANCE SPECIFICATIONS ......................................................................................................................... ii INTRODUCTION ................................................................................................................................................... 1 INSTAL
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INTRODUCTION The Hafler 9303 and 9505 are two channel professional power amplifiers. Passive cooling with large heatsinks is used for low mechanical noise. Our patented trans•nova circuit topology and MOSFET output stage ensures trouble free, long term operation and is backed by our seven year warranty. This manual contains information on using the 9303 and 9505 amplifiers. It is organized into three main sections. “Installation” covers the location and connection of the amplifier in the system.
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INPUT The 9303 and 9505 have input jacks for both balanced and unbalanced input signals. The unbalanced inputs use conventional RCA phono jacks. When using the RCA inputs, the rear panel BALANCED/UNBALANCED switch must be set to the UNBALANCED position. The balanced input jacks are dual function connectors which accept 1/4" TRS (Rip Ring Sleeve) phone or XLR plugs. Set the BALANCED/UNBALANCED switch to the BALANCED Position to use these jacks. The connector pin-out is printed on the rear panel o
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OPERATION POWER SWITCH The POWER switch is located on the front panel of the amplifier. An internal lamp indicates when it is turned on. Standard practice is to turn the amplifier on last and off first when switching components individually to prevent sending damaging transients, generated in the source components, to the speakers. It is possible to leave the power switch in the on position and switch the amplifier remotely through a power distribution block or preamp switched outlet. When doing
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SCHEMATIC DIAGRAM NOTES: Unless specified otherwise 1. All resistors in ohms 2. All capacitors in microfarads 3. Component Designators: 1-99: Left Channel 101-199: Right Channel 201-299: Common Parts 301-399: Chassis/Power Supply 4. Left Channel Only Shown 5. Stereo/Mono Switch Shown in Stereo 6. Balanced/Unbalanced Switch Shown in Balanced Position 7. Chassis/Float Ground Switch Shown in Float Position – 4 –
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– 5 –
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PC BOARD LAYOUT – 6 –
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PARTS LIST DESIGNATOR VALUE PART # DESIGNATOR VALUE PART # ALL RESISTORS IN OHMS R213 220, 1/4W, 5% RM/4-221C R1, R101 47.5k, 1/4W, 1% RM/4-4752C R214 220, 1/4W, 5% RM/4-221C R2, R102 47.5k, 1/4W, 1% RM/4-4752C R215 10k, 1/4W, 5% RM/4-103C R3, R103 1k, 1/4W, 5% RM/4-102C P1, P101 200, Trim Pot RVH-201 R4, R104 1k, 1/4W, 5% RM/4-102C P2, P202 200 Trim Pot RVH-201 R5, R105 2.2M, 1/4W, 5% RM/4-225C R6, R106 100, 1/4W, 5% RM/4-101C D1, D101 BAV99L SS-260SM R7, R107 22k, 1/4W, 5% RM/4-223C D2, D102 B
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DESIGNATOR VALUE PART # DESIGNATOR VALUE PART # Q8, Q108 MMBT5087L SS-0115 BR201 Bridge Rectifier SS-222 Q10, Q110 MMBT5088L SS-0114 BR301 Bridge Rectifier SSH-609 Q11, Q111 MMBT5087L SS-0115 BR-302 Bridge Rectifier SSH-609 Q12, Q112 MMBT5088L SS-0114 IEC Connector CC-0918 Q13, Q113 MMBT5087L SS-0115 IEC Line Cord FA-0209 Q14, Q114 MPS-A56 SS-101A Dual Binding Post CC-0867 Q15, Q115 MPS-A56 SS-101A MOSFET Insulator HWH-442 Q16, Q116 MPS-A06 SS-102A Q17, Q117 MPS-A06 SS-102A Q45, Q145 2SK1058 SSH
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TECHNICAL REFERENCE THEORY AND OPERATION OF trans•nova The (TRANSconductance NOdal Voltage Amplifier) principle is based on our 1984 U.S. Patent 4,467,288. This patent describes the advantages of audio power amplifiers in which a MOSFET output stage is connected in a grounded source configuration. In this connection the output stage has its full voltage gain of typically 20dB (ten times), instead of the usual 1dB loss of voltage follower designs. It is an inevitable result of electrical physics
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The final output stage utilizes lateral MOSFETs; four pairs are used for each channel in the 9505 and three pairs in the 9303. These devices, unlike conventional bipolar transistors do not exhibit “thermal runaway.” Thermal runaway is a phenomenon whereby a transistor heats up as it draws more current, which causes it to get hotter, and conduct more current, and so on until the device self destructs. Since the MOSFETs are inherently self protecting, no sonically degrading, complex circuitry is r
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SERVICE POLICY AND LIMITED WARRANTY If you encounter any difficulty or have any question concerning your 9303 and 9505 Amplifier, please call our Technical Support Department weekdays, 8:00 a.m. to 3:30 p.m., Mountain Standard Time, at 800-795-2385. Should you have any doubts as to whether the amplifier is malfunctioning and requires service, please call us before sending it in for repair. All units being returned (regardless of warranty status) must receive a Return Authorization (RA) number.
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HAFLER PROFESSIONAL A DIVISION OF ROCKFORD CORPROATION 546 SOUTH ROCKFORD DRIVE TEMPE, ARIZONA 85281 U.S.A. IN U.S.A. (602) 967-3565 IN EUROPE, FAX (49) 4207-801250 IN JAPAN, FAX (81) 559-79-01265 MAN-0587-D 4/95
