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发表于 2010-12-7 18:06:02
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GX-747个人认为非常漂亮,在民用级别上完全满足要求了,有待DBX版本的,可惜上次没有拍到,只好退而求其次,GX-646本人也非常喜欢。+ s+ u, y% w/ N& l. J
各项指标如下:* O$ N9 R: E* ]/ E8 z1 u- [
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Track System….4 Track 2 Channel Stereo System , S/ S; s& u/ ^: P) Y' H7 K
Reel Capacity....Up to 10” Reel
' {2 a0 ]4 F! xHeads....
. j1 z) t! y' g, B8 K6 t1 xGX head for recording x 2;
( {) H Z# F1 n% d$ e# S0 oGX head for playback x 2;
& D9 B7 n J" w6 R- ~$ IErase head x 2
" M1 ^% w8 {" K, M5 c' eMotors....
* H, g* x V; f; UAC Servo motor for capstan drive x 1;
' c4 ?! k, n* X+ f6 lAC Eddy current motor for reel drive x 2 4 { ^" i5 ?! q& k( J/ f
Tape Speed....7 t4 L% p' o) F
19 cm/s +0.8% (7 ½ ips.);
7 k$ G5 X# i. x+ h- R) Q1 O4 `9.5 cm/s +1.0% (3 ¾ ips.) 4 _- ~' G$ j( [( a# u! x+ `
Wow and Flutter....+ g" A# l5 x) Y
Less than 0.03% WRMS at 19 cm/s; + y7 R6 F+ c' Q% b, v2 ?# S
Less than 0.04%WRMS at 9.5 cm/s 5 w& J! `, K4 d* c) d. @
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape F0 i0 z' Q- T1 h
Frequency Response....
; K; [% i: C K' A d. e- [, R, `25 to 33,000 Hz +3 dB at 19 cm/s;
0 X6 o5 s0 \2 q: W# B, f* V25 to 26,000 Hz +3 dB (0 VU);
2 p# s: t+ K6 x% M$ d: O25 to 33,000 Hz +3 dB at 9.5 cm/s;
8 w. _$ \0 Y' Z2 C% Y5 D4 H" e25 to 15,000 Hz +3 dB (0 VU)
+ ^ i1 b4 ^& A3 G, |" TSignal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) ) N8 `: S7 ^4 X; V- g+ C/ a. b. l( d
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
1 U7 D5 L/ h5 d1 @* S( R5 NHarmonic Distortion....Less than 0.4% at 19 cm/s
. `( m- ]2 q% y: IInput....
8 N' J" O" ^ x: E2 g) ^MIC: 0.25 mV; Required microphone impedance: 600 ohms;
5 z$ W; C4 X8 \5 jLine: 70 mV
b; G$ C* }. \8 Q+ h: EOutput..../ c, o6 H: ], z7 X7 ?4 I9 u' u
Line: 410 mV;
, @3 Z+ n, n" m$ S aPhone: 1.3 mW - M# Y. Q: d% s/ ^0 s7 z5 ^. _
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable $ M2 t. k! c! N" ^$ \
Dimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches) 5 e# s: q! N0 D2 P5 p4 H
Weight....23.2 kg (51.0 lbs) |
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