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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。
, e5 x; p9 q( R: b+ R各项指标如下:
. q' f& f9 M1 E& B P2 ~
/ d; f8 |' @* N" R: O; pTrack System….4 Track 2 Channel Stereo System
. P* [, x8 C T: l2 Y1 SReel Capacity....Up to 10” Reel 7 F) g9 L/ U# S8 s1 N% }. e6 `5 s9 z
Heads....! N6 D2 O G5 P1 Y0 v0 N
GX head for recording x 2;
) G$ F/ y' U- P+ Q' @GX head for playback x 2;
* O. j- Z8 r hErase head x 2 3 |* T+ c. N8 r8 g% _3 j
Motors....
t' {( \; y6 q$ w4 Y' B+ OAC Servo motor for capstan drive x 1; 2 ^4 W8 q: l! |
AC Eddy current motor for reel drive x 2 4 T6 {( {; J0 P: X! _2 U! x
Tape Speed....
) g3 Z9 A$ D- @0 y; v6 a/ r19 cm/s +0.8% (7 ½ ips.); 0 A# V0 d8 W2 c
9.5 cm/s +1.0% (3 ¾ ips.) # _0 f' @3 Q$ @' R8 J7 L
Wow and Flutter....( A s0 T0 B/ s. W
Less than 0.03% WRMS at 19 cm/s;
: N3 V) o# b \$ C0 lLess than 0.04%WRMS at 9.5 cm/s " E6 [) C. c6 ]7 y# W
Tape Winding Time....75 sec. using 360 m (1,200 ft.) Tape 4 D4 e4 T1 G; i' x8 y- G
Frequency Response....
. M9 X2 T7 L& X3 t5 f0 N m* u25 to 33,000 Hz +3 dB at 19 cm/s; * `/ L2 n0 g; q& G/ P1 o
25 to 26,000 Hz +3 dB (0 VU);
7 [( }: N! `1 m3 `/ r% M25 to 33,000 Hz +3 dB at 9.5 cm/s;
" V) D6 j% s+ W9 f2 M25 to 15,000 Hz +3 dB (0 VU)
/ V4 y2 X& j9 @" ?+ ~Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF)
' n6 r0 S, s1 M0 b; U% hDynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level) 7 }' k8 P. p. C: j2 S. o- B
Harmonic Distortion....Less than 0.4% at 19 cm/s & G7 ^. N. \+ `! ]( I
Input....
! z! Y7 g' E& l' S6 bMIC: 0.25 mV; Required microphone impedance: 600 ohms; 5 L1 g% x* {# R6 X. X
Line: 70 mV : B5 R! M2 y' X& L
Output....2 o% Y9 R" j1 }. b" t0 H" f" ?
Line: 410 mV;
5 `# J# q5 }* v, A6 k4 lPhone: 1.3 mW " P9 l# y$ g: C
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable
! g. x9 ~% a {* |+ bDimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches)
* K) P& u( j: {. p* k, R* X$ d4 vWeight....23.2 kg (51.0 lbs) |
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