Accuphase P-7100 사용 설명서 - 페이지 8

{카테고리_이름} Accuphase P-7100에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Accuphase P-7100 18 페이지. Stereo power amplifier

페이지 인쇄

4. Parts and Functions

METER OFF

Meter On/Off Button

Button engaged (OFF):

Meters are deactivated and meter illumination is out.

Button disengaged {ON) ;

Meters are operating and meter illumination is on.

I N PUT

Input Selector Button

Serves to select the type of input signal connected to INPUTS

@ . f n e i n d i c a t i o n o f t n e i n p u t t y p e i n d i c a t o r s @ c h a n g e s

accordinolv.

Button engaged (BALANCED):

Balanced

input is selected and the"BALANCED'

LED lights up.

Button disengaged (UNBALANCED):

Unbalanced

input is selected and the"UNBAI-ANCED'

LED lights up.

POWER

Power Switch

Engage this switch to activate the amplifier. Push once more

to release the switch and turn the amplifier off. For an interval

o f a b o u t f i v e s e c o n d s a f t e r o o w e r i s t u r n e d o n . t h e r e w i l l b e

no sound from the speakers, due to the action of the muting

c i r c u i t ,

GAIN

Gain Selector

L e t s y o u s e l e c t t h e a m p l i f i e r g a i n i n 4

s r a g e s .

MAX

T h i s i s t h e n o r m a l p o s i t i o n , r e s u l t i n g i n a g a i n o f 2 8 d B .

-3d8, -6d8, -12d8

T h e s e p o s i t i o n s r e s u l t i n l o w e r g a i n c o m p a r e d t o t h e M A X

s e t t i n g , a n d a l s o i n c o r r e s p o n d i n g l y l o w e r n o i s e . C h o o s i n g

one of these positions may be desirable when using the am-

p l i f i e r t o d r i v e m i d r a n g e o r h i g h - r a n g e s p e a k e r s i n a m u l t i -

amped system, where residual noise can be a problem. The

s e l e c t o r i s a l s o c o n v e n i e n t i n c a s e s w h e r e t h e u s e o f h i o h -

efficiency drivers makes Ievel matching difficult.

UNBALANCED/BALANCED

Input Type Indicators

These LEDs show the position selected with the input selec-

tor button p on the f ront panel.

Power Meters

The meter scale indicates the output level in dB (decibel) and

i n p e r c e n t ( % ) . T h e m e t e r s a r e c a l i b r a t e d f o r a 2 - o h m l o a d

(0 dB = 500 W). With a 4-ohm load, the figures must be halved,

a n d w i t h a n 8 - o h m l o a d d i v i d e d b y f o u r . O u t p u t l e v e l s w i t h

a s i n e - w a v e s i g n a l f o r v a r i o u s l o a d s a r e s h o w n i n t h e t a b l e

0etow.

T h e m e t e r s a r e p e a k - r e a d i n g t y p e s , w h i c h e n a b l e s t h e m t o

precisely follow the rapid changes in amplitude and frequency

t h a t a r e c o m m o n w i t h m u s i c s i g n a l s .

To make for easier reading, the decay time of the meters is

set to a lower value than the rlse time. lf the program source

contains noise or a large amount of transients, the meter jndi-

c a t i o n a n d t h e a u r a l v o l u m e i m p r e s s i o n m a y d i f f e r s l i g h t l y .

* For information on meter indication in bridged mode, refer

to Daoe 9.

B R ID G E CO NN ECT IO N

Bridged Gonnection Indicator

T h i s L E D l i g h t s u p w h e n t h e B R I D G E p o s i t i o n h a s

chosen with the mode selector @ on the rear panel.

b e e n

- 4 0 d 8 : 0 . 0 1 %