走访台湾“音悦音响”，用HD650比较了英、德三台耳放。（一）

Pan · 发表于 2007-5-1 13:15:45

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这段日子身在台湾，昨日闲来无事，走访了“音悦音响”一趟，想购置套HD650系统作探究，了却一个心愿“深海梦”。

店员态度殷勤亲切，当我说明来意后，示意我到唱片架里挑选喜爱音乐，并主动地把我指定的3台耳放打开电源预热。

3台耳放分别是英国Graham Slee - SOLO

規格：
SPL gain into 32Ω: +15dB
SPL gain into 300Ω: +16dB
SPL gain into 600Ω: +14dB
Input Sensitivity: 125mV into 30kOhms
Frequency Response: 12Hz (-.5dB) to 100 kHz (-3dB) at half power
Distortion: 0.01% at half power
Signal to noise: 89dB
Headphone Impedance: Optimized for 30 to 600 Ω
Dimensions: 4.1 x 2 x 7.1 (WxHxD in inches)
Weight: 5 lbs.

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德国 Audio valve RKV MKII

Specifications:

OTL - transformer outless tube amplifier
Double mono construction
Alps volume control
1 pair 6,3 mm stereo jacket for headphones
Tubes: 4 * PCL 805 (PCL 85 or 18 GV 8 - german old TV "vertikal" ampl. tube )
Power output: each channel 3 watt SINUS, ( between 100 to 400 ohm loads )
Bandwide: 15 - 100 000 hz
amping 3600 !
Distortion 0,002 % at 1 Watt-200 Ohm load
Max. output voltage 80V
Sens. 0dBm
IC - fullautom. - controlled bias
Class - A
Power consumption 40 watt
Size 360*200*120 mm (d.w.h.)
Weidht 10kg

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德国 CORDA OPERA - Analog

2 headphone outputs
( 0/120 Ohm output impedance ).
Maximum output 13V / 500 mA.
Gain switch. Maximum gain factors -5 / +8 dB.
Crossfeed filter switch:
1. Stereo / crossfeed OFF
2. Crossfeed ON

2 pairs of analog inputs
Input impedance 12 kOhm

1 digital S/PDIF input
1 digital USB-input
1 pair of volume-controlled preamplifier outputs.

Gold-plated input jacks.
Silver plated headphone jacks (Neutrik).
Silver plated heavy duty switches
Alps Blue potentiometer for volume control.
25 Watts toroidal transformer for the analog section.
7 Watts toroidal transformer for the digital section.
110V and 220V mains power switchable.
Power uptake 12 Watts
Built-in groundloop breaker.
Schottky rectifying diodes in the power supply.
Double regulated voltage lines.
Low impedance electrolytic buffer capacitors (Nichicon).
Total Buffer capacity 80.000 uF.
Bypass capacitors in the power supply.
Polystyrol and polypropylen capacitors in the signal path.
Metalfilm resistors in the signal path.
Double sided PCB
LM6171 opamps biased into class-A using LM334 current sources.
2 BUF634 buffer amplifiers at left and right headphone output channel.
(Active) balanced headphone ground
3 BUF634 buffer amplifiers at the balanced ground headphone output channel.
PCM2704 as USB-to-S/PDIF receiver
CS8420 as S/PDIF receiver (in high-jitter-reduction mode)
PCM1794 D/A converter-chip.
LM6171 opamps biased into class-A for I-V conversion.
Sampling frequencies / resolution
8..96 kHz / 16, 20, 24 bit (S/PDIF)
32, 44.1, 48 kHz / 16 bit (USB)
Star-grounding.
Ultra short signal paths.
Signal paths and signal path components at the bottom side of the PCB for maximal shielding.
Sturdy aluminium enclosure
Weight: 3.9 kg.
Size: 27.6 x 27.8 x 8,7 cm.

待续..............................

[ 本帖最后由 Pan 于 2008-7-13 09:50 编辑 ]