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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。
5 U0 ^: [0 O6 J( b各项指标如下:
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8 |6 R' H/ q" l! z6 B* o" G4 bTrack System….4 Track 2 Channel Stereo System
' t6 x1 A3 y: f" TReel Capacity....Up to 10” Reel 2 s; l4 c \& I7 h" ^5 t# F& _
Heads....0 K- V2 C4 c; Y, ^8 N
GX head for recording x 2;
4 r; o/ ^5 F# G8 _" nGX head for playback x 2; / x1 D" N6 |% \
Erase head x 2
- O0 v8 _; l s3 P0 ^, w5 mMotors....3 A! N8 w0 ]; x7 K9 j/ S
AC Servo motor for capstan drive x 1; $ A8 h* V# d: x/ x
AC Eddy current motor for reel drive x 2 ( S( E) C% K9 V* Z& t- y
Tape Speed....
0 f$ [/ P$ L5 h$ f9 P, W19 cm/s +0.8% (7 ½ ips.);
2 m- o) d. k/ ^+ A2 v8 x4 }! a9.5 cm/s +1.0% (3 ¾ ips.)
2 r2 H- x- H6 C& O" Y KWow and Flutter....; z4 I/ \( H4 V0 G8 ^4 y: f) n. j5 Y9 D
Less than 0.03% WRMS at 19 cm/s; ! o1 A7 ^" i1 v* e. u
Less than 0.04%WRMS at 9.5 cm/s
" k5 k! l5 m7 _5 ^) g( y* A# C" VTape Winding Time....75 sec. using 360 m (1,200 ft.) Tape % C+ Y0 Z& d, {1 V2 L1 ^& e
Frequency Response....
' E7 _2 W) f7 q n2 m25 to 33,000 Hz +3 dB at 19 cm/s;
' V! _( |* Z# y. b7 k5 r25 to 26,000 Hz +3 dB (0 VU);
( p$ b7 h' N1 C; @- p5 G, W0 f25 to 33,000 Hz +3 dB at 9.5 cm/s; 8 c! _+ R9 g7 u" `
25 to 15,000 Hz +3 dB (0 VU) , d7 F/ Y6 b9 Z8 M) z
Signal to Noise Ratio....Better than 65 dB (19 cm/sec dbx switch: OFF) % Q" X" [8 e* L. T+ j# X
Dynamic Range....128 dB (dbx switch: ON, 1 kHz, peak recording level)
/ e1 k, |- A4 Z) Q5 tHarmonic Distortion....Less than 0.4% at 19 cm/s
9 L6 S- z2 Z/ ^$ L9 t6 BInput....& _/ i' Y9 s/ ?3 X6 E
MIC: 0.25 mV; Required microphone impedance: 600 ohms;
7 `# T/ L0 S$ ?) v8 b ELine: 70 mV
3 n0 |! k7 s5 A# @) l" H: NOutput..../ S! y# w, R$ f( L5 `% T+ v
Line: 410 mV;
( v0 U, H$ J. x& x: PPhone: 1.3 mW ; F( R; T: c5 X( Z' Q" E |
Power Requirements....110V, 120V, 220V, 240V; 50/60 Hz switchable
J# s; Y& h3 M$ U, s7 DDimensions...440 (W) x 493 (H) x 256 (D) mm; (17.3 x 19.4 x 10.1 inches) : ~+ D1 v5 q+ L6 e
Weight....23.2 kg (51.0 lbs) |
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