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power amplifier xa8550 instructions ? http://
1 chapter 1 important safety instruction the lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to presence of uninsulated dangerous voltage within the product s enclosure that may be of suf ficient magnitude to constitute a risk of electric shock to persons. danger ous v olta ge the exclamation point within an equilateral triangle is intended to alert the user to presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. impor tant instr uctions marking by the " ce " symbol indicates compliance of this device with the ems ( electrornagnetic compatibility ) and l vd ( low voltage directive) standards of the european community . ! xa8550 !
2 chapter 1 1.1 bef or e use important safety instruction unpack your xa8550 power amplifier and keep all packing materials for future transport or service, locate and remove all accessory items from the accessory box within the controller shipping carton. accessories included: p l e a s e r e a d a l l i n s t r u c t i o n s a n d p r e c a u t i o n s c a r e f u l l y a n d c o m p l e t e l y b e f o r e o p e r a t i n g y o u r x a 8 5 5 0 p o w e r a m p l i f i e r . 1 . r e a d t h e s e i n s t r u c t i o n s . 2 . k e e p t h e s e i n s t r u c t i o n s . 3 . h e e d a l l w a r n i n g s . 4 . f o l l o w a l l i n s t r u c t i o n s . 5 . d o n o t u s e t h i s a p p a r a t u s n e a r w a t e r . 6 . c l e a n o n l y w i t h d r y c l o t h . 7 . a l w a y s k e e p t h i s u n i t o u t o f t h e r e a c h o f c h i l d r e n . 8 . d o n o t i n s t a l l n e a r a n y h e a t s o u r c e s s u c h a s r a d i a t o r s , h e a t r e g i s t e r s , s t o v e s , o r o t h e r a p p a r a t u s ( i n c l u d i n g a m p l i f i e r s ) t h a t p r o d u c e h e a t . 9 . p r o t e c t t h e p o w e r c o r d f r o m b e i n g w a l k e d o n o r p i n c h e d p a r t i c u l a r l y a t p l u g s , c o n v e n i e n c e r e c e p t a c l e s , a n d t h e p o i n t w h e r e t h e y e x i t f r o m t h e a p p a r a t u s . 1 0 . u n p l u g t h i s a p p a r a t u s d u r i n g l i g h t n i n g s t o r m s o r w h e n u n u s e d f o r a l o n g t i m e . 1 1 . a l w a y s d i s c o n n e c t y o u r e n t i r e s y s t e m f r o m t h e a c m a i n s b e f o r e c o n n e c t i n g o r d i s c o n n e c t i n g a n y c a b l e , o r w h e n c l e a n i n g a n y c o m p o n e n t . 1 2 . t h i s p r o d u c t m u s t b e t e r m i n a t e d w i t h a t h r e e c o n d u c t o r a c m a i n s p o w e r c o r d w h i c h i n c l u d e s a n e a r t h g r o u n d c o n n e c t i o n , t o p r e v e n t s h o c k h a z a r d , a l l t h r e e c o n n e c t i o n s m u s t a l w a y s b e u s e d . 1 3 . a c e x t e n s i o n c o r d s a r e n o t r e c o m m e n d e d f o r u s e w i t h t h i s p r o d u c t . 1 4 . n e v e r u s e f l a m m a b l e o r c o m b u s t i b l e c h e m i c a l s f o r c l e a n i n g a u d i o c o m p o n e n t s . 1 5 . n e v e r o p e r a t e t h i s p r o d u c t w i t h a n y c o v e r r e m o v e d . 1 6 . n e v e r p o u r o r s p i l l l i q u i d s d i r e c t l y o n t o t h i s u n i t . 1 7 . n e v e r b l o c k a i r f l o w t h r o u g h v e n t i l a t i o n s l o t s o r h e a t s i n k s . 1 8 . n e v e r b y p a s s a n y f u s e . 1 9 . n e v e r r e p l a c e a n y f u s e w i t h a v a l u e o r t y p e o t h e r t h a n t h o s e s p e c i f i e d . 2 0 . n e v e r a t t e m p t t o r e p a i r t h i s p r o d u c t , i f a p r o b l e m o c c u r s , c o n t a c t y o u r d e a l e r . 2 1 . n e v e r e x p o s e t h i s p r o d u c t t o e x t r e m e l y h i g h o r l o w t e m p e r a t u r e s . 2 2 . n e v e r o p e r a t e t h i s p r o d u c t i n a n e x p l o s i v e a t m o s p h e r e . 1.2 chec k accessor y xa8550 1. ac power cord 1 2. remote controller 1 3. aaa batteries 2 4. user manual (this manual)
3 xa8550 is a dual channel power amplifier . the appearance is both simple and elegant. besides, the sound of this unit is fast with high analysis ability and full musical taste on the base of good balance. the circuit features of this unit are as following: power amplifying circuit the power amplifying circuit of the power stage is the classical current negative feedback circuit with full symmetrical and full complementary structure which is well appraised in audio field. the main advantages of this circuit are low distortion, wide dynamic range, good controlling ability , steady work and euphonic tone color . the current amp lifying circuit is three-stage darlington circuit, whose first sta ge ad op ts mje 35 0/m je3 40 ge min ate tra nsi sto rs an d sec on d sta ge ad op ts t osh ib a 2sc517/2sa1930 geminate transistors. the output transistors are three pairs of sanken 2sc3264/2sc1295 high current geminate transistors. thus this amplifier has powerful drive. power supply system this unit adopts two 300w annular transformers as power supply , so 600w power in total. besides, the rectifiers are 50a/400v bridge rectifiers. the main power supply filtering capacitances are 82000uf/63v rubycon electrolytic capacitances. rca input port the two pairs of rca ports are parallel connected. when there is signal on the input ports, on the output ports the signal could be transmitted to the bass or to the second amplifier to achieve the partial tone on bi-amplifiers. output port considering the special connecting way for partial tone, two pairs of output ports for loudspeakers are of fered on each channel. 2.1 pr oduct f ea tur es introduction chapter 2 xa8550 xa8550t
xa8550t 4 introduction chapter 2 2.2 f r ont p anel & r ear p anel xa8550 u v u v power button this b utton con nects a nd disconnects the xa85 50 from the ac ma ins power . by using the b utton to turn the system on and of f. power on indicator w hen this unit is switched on, the indicator will glitter , which shows the system is in pre-heating model. about 5 seconds later , the indicator will stop glittering and keep light when the system is in protected model, the indicator will be glittering all the time. u v audio input connect the input signal by rca. right loudspeaker binding posts t o output the amplified audio signal and be connected to the right channel speaker with loudspeaker cable. power supply input jack connect it to the power supply by attached power cord. w left loudspeaker binding posts t o output the amplified audio signal and be co nn ec te d to th e le ft ch an ne l sp ea ke r wi th loudspeaker cable. signal output this output signal could be connected to the loudspeaker or other amplifier . front panel rear panel u v w x y ~ ]? s ]? s os??q ! ! x y
operation instruction chapter 3 3.1 connection xa8550 1 .before using this machine, you have to connect it to sound sources (such as cd player , dvd player , sacd player) by signal cable. also you need to check if the signal connection of the left and right channel is correct and reliable. 2.before connecting the machine to the right and left channel speaker by speaker cables, it s strongly suggested that you consult the dealer if your speaker cable is available for this machine and make sure of the right channel and polarity . 3.please be very careful when connecting the power cable. make sure the power supply has been cut of f before connecting to the accessory power cable. if you do have to use other power cables, please check if the specifications are up to the requirements of this machine. w e claim that we are not reliable for the damages caused by the use of other power cables. please make sure all the power supplies have been cut of f before connecting any cable to this machine. if you have no ability to install this machine, please ask those who are guided or are capable to accomplish the installation or connection. ! ! x a 8 5 5 0 p o w e r a m p li f ie r r i g h t c h a n n e l l o u d s p e a k e r ~ ]? s ]? s os??q l r l r p r e - a m p l i f i e r s2 s 3 s 1 s4 input ir s ensor power v o lu m e max. min. v a cuum t ube pre-amplifier xa3250 l r l r c d or sac d pla yer le f t ch annel lou dspe ake r output output input connection to power supply 5
6 operation instruction chapter 3 xa8550 3.2 gener al pr oblems and t r ouble-shootings problem possible cause t rouble-shootings t he machine is not electrified power connector not plug well fuse has fused 000 plug the power connector again. change the fuse coincide with the prompt requirement. there is no sound sound source turned of f signal cable is broken the volume is turned down to the minimum signal selector switch wrong root noise of sound source too big signal shielding ef fect badly signal source input phase opposed speaker wire to channels has exchanged or positive negative reversed noise too big left and right channel confused t urn on the sound source. check and change signal cable. t urn up the volume. replace the sound source with another one with higher signal to noise ratio. t une input selection button according to sound source . connect according to the indication of left and right channel. change eligible signal cable notice: if you have been confronted any problems when using this product or have any suggestion to tell us, please visit the wesite of xindak: http://www .xindak.com, you may access our instant technique support here.
7 unit: mm chapter 4 4.1 dimensions specifications xa8550 426mm ~ ]? s ]? s 430mm 153mm
8 chapter 4 specifications xa8550 4.2 specifica tions * all specifications, dimensions and weights are subject to change without notice. < power output < signal-to-noise ratio < audio inputs distortion (thd + noise) < dimensions (w*d*h) < input sensitivity < net weight < supply voltage < frequency response < audio outputs < 130 watts pre channel at 8 ohm 250 watts pre channel at 4 ohm 10hz - 100khz (1db) 95db t ypical(a w eight) one pair single-ended on rca one pair record outputs on rca two pairs speaker binding posts pre channel <0.05% 430mm*426mm*153mm 1.8v 22.5kg specified on rear panel decal (cannot be changed by user or dealer)
no.126, section 2, east 1 round chengdu, sichuan, china p .c. 610051 y ou can find your nearest authorized distributor and more product information on our website: www .xindak.com

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