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1. Introduction:
9i-906 "Silver Fox" is a headphone power amplifier with high performance, strong power supply and high current output. It's circuit design is complex and perfect - 4 pairs of high-power British FET are used in output part. The output power is 30Ω/20W. Ultra-low sensitivity headphones can also be driven with excellent audio performance.
Since its launch, the “Silver Fox” has received widespread acclaim. Both in the United States and Europe with numerous users giving it raving reviews. Some of them were:
https://www.head-fi.org/showcase/cen-grand-9i-906-silver-fox.26606/
https://6moons.com/audioreview_articles/cen-grand-silverfox/
https://www.head-fi.org/threads/cen-grand-9i-906-silver-fox.966805/
https://www.hifistatement.net/tests/item/3510-cen-grand-9i-906-silver-fox
It has four output modes:
· Normal (generally used by low impedance headset),
· Parallel (driving medium impedance headphone, increasing driver force but does not increase gain)
· Balanced (driving high impedance headset), and
· Virtual Ground (Active G, suitable for listening to vocal, very characteristic with a strong sense of overtone)
In addition, there are three low resistance modes and one high resistance mode. A variety of headphones can be matched.
It has two balanced and two unbalanced inputs. Even if you input an unbalanced signal, the internal circuit will convert it into balanced signal. Therefore, even if you input an unbalanced signal, you will also get the maximum output power.
The "Silver fox" has four output interfaces: 4 pin XLR balanced, 6.35 single, 4.4 balanced as well as double 3 pin XLR balanced.
2. Operating Instructions:
The "Silver fox" is a pure headphone Amp and the operation is very simple. There are only several function keys: power switch, input selection, output mode selection, high/low resistance selection.
Long press the out key to switch between high and low resistance modes. There are four kinds of headphone impedance options for choice: high resistance, low resistance 1, 2, 3. You can select any mode according to whether you hear noise. High resistance mode is recommended in most cases.
3. Performance Parameters:
Power: 20W (30 Ω BTL, distortion 0.02%)
Frequency response: 20-20KHz (0.2db)
Net Weight: 12kg
Gross Weight: 13.7kg
