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Premium AI Voice Guide
PROLiam's bench-side rundown of the Hitachi SR-2004.
Real-time streaming voice — specs, history, restoration pain points, market value.
Sonic Similarity Analysis
Both utilize advanced amplification topology for efficiency and power—Class G in the SR-2004, Direct Digital in the C 390DD—delivering neutral, dynamic sound with exceptional headroom. The similar wattage and emphasis on transparency over coloration make them sonic cousins. Both provide effortless power delivery and maintain neutrality across the frequency spectrum with strong bass control.
Hitachi SR-2004
vs.
NAD C 390DD
120W
Watts / ch @ 8Ω
150W
90dB
S/N Ratio
100dB
55
Damping Factor
200
0.03%
THD
0.003%
44 lbs
Weight
31 lbs
4-8 Ω
Speaker Ohms
4-8 Ω
10Hz - 50kHz
Frequency Response
20Hz - 20kHz
Vintage (used avg)
$850
Modern (new)
$2,749
Difference
$1,899more new
Cross-Match Engine · Pro
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