Summary of 9180 Series
Page 2
Notice - important safety information warning: to prevent fire or shock hazard, do not expose this equipment to rain or moisture. The lightning flash with arrowhead symbol within a n e q u i l a t e r a l t r i a n g l e i s i n t e n d e d t o a l e r t t h e user to the presence of uninsulated “da...
Page 3
11. Non-use periods during periods of extended non-use, the power cord should be unplugged from the power source. 12. Cleaning the equipment should be cleaned only as detailed in the operating instructions. 13. Object and liquid entry care should be taken so that objects and/or liquids, such as clea...
Page 4
Table of contents performance specifications .......................................................................................... 4 general information .............................................................................................................. 4 installation rackmounting.. ....
Page 5: Performance Specifications
Performance specifications general information all specifications are for 20 hz - 20 khz, at full power into 8 ohms, unless specified otherwise. Power rating: 9180: 9270: rated thd: full power bandwidth: signal to noise ratio: input impedance: input sensitivity: 9180: 9270: damping factor: slew rate...
Page 6
Installation rack- mounting ventilation/ placement line voltage the 9180/9270 amplifier is supplied in either a 17” black version, or a 19” silver version. The 19” model has rackmounting holes provided for installation in equipment racks. The holes are on standard eia spacings. Due to conflict with ...
Page 7
Left/mono gain power switch u p - o n d o w n - o f f rackmount holes right rack handles ( 1 9 ” v e r s i o n o n l y ) gain ( 1 9 ” v e r s i o n o n l y ) 9180 / 9270 amplifier front panel view.
Page 8
Mono/stereo switch in mono ri gt o u t s t e r e o i n ac line voltage rating connector t t left/mono input mono+ output left o u t p u t o u t p u t 9180 9270 amplifier rear panel view.
Page 9
Outputs i all output connections to the amplifier must be performed with the amplifier off! The left and right audio outputs from the amplifier are via standard 5-way type, 3/4” spacing, binding posts. Connect these binding posts to the loudspeakers. The amplifier’s binding posts will accept single ...
Page 10
Circuit highlights the input stage of the 9180/9270 amplifier utilizes four low-noise, high-g, jfet’s (high transconductance junction field-effect transistors), in a fully complimentary, symmetric configuration. This circuit configu- ration results in excellent front-end headroom and a simple, strai...
Page 11: Additional Information
Additional information loudspeaker load impedance considerations changing line voltage rating adjustlng bias the 9180/9270 amplifier is suitable for use with a wide variety of loudspeaker types and load impedances. Though not rated for impedances below 4 ohms, the amplifier is capable of driving low...
Page 12
General troubleshooting hints g r o u n d loops warning! Unplug the unit from ac power before attempting this procedure. Failure to do so can result in severe electrical shock. Required test equipment: milliammeter capable of measuring at least 300 ma. 1) remove the top cover by removing the seven a...
Page 13
Cleaning/ maintenance it may be necessary to use additional adaptors on other grounded components if more than two components are earth grounded. (in other words, only one earth ground per system should exist.) another potential source of multiple earth grounds is from coaxial antenna or cable servi...
Page 14
Designator r33,r133 r34,r134 r35,r135 r36,r136 r37,r137 r38,r138 r39,r139 r40,r140 r41,r141 r42,r142 r43,r143 r44,r144 r45,r145 r46,r146 r47,r147 r201 r 2 0 2 r 2 0 3 r 2 0 4 r 2 0 5 r 2 0 6 r 2 0 7 r 2 0 8 r 2 0 9 r 2 1 0 r211 r 2 1 2 r 2 1 3 vr1 ,vr101 p1,p101 value 47.5k 33.2k 47.5k 1 0 0 1 0 0 1...
Page 15
Left/mono input left/mono mono/stereo switch right input output thermal thermal sensors p r o t e c t i o n system t u r n o n / o f f system 9180 9270 functional block diagram.
Page 18
, (see c h a r t ) 6 schematic diagram rmsed 1 1 1 (see c h a r t ) cr201 1 68.1 k 0.01 to r. To l. Ch. Ch..
Page 19
Note!3 unless specified otherwise 1. All resistors in ohms 2. All capacitors in microfarads 3. Couponent designators: l - 9 9 : left c h a n n e l 101-199: right channel 2 0 1 - 2 9 9 : c o m m o n parts 301-399: chassis/power supply 4 . Ql7/q117 & q20/q120 not present on series 9180 5. Left channel...
Page 20
Service policy and limited warranty if you encounter any difficulty or have any question concerning your 9180/9270 amplifier, please call our customer service department weekdays, 8 a.M. To 3:30 p.M., mountain standard time, at 602-967-3565. Should you have any doubts as to whether the amplifier is ...