Shuguang S300i 300B SET Integrated Amp This is a Shuguang S300i 300B SET integrated amp that I bought on Audiogon in Nov. 2013. The original owner seemed very knowledgeable about it and even wrote up some small mods he made to it in Audio Circle. Shortly after it arrived, I had a medical problem which kept me from lifting anything for a few months. In the mean time I have decided to decommission the system this was purchased for, so I am reselling the amp and tubes. The amp package has not been opened, but I opening the tube box to check them out. I will also include a pair of new Mullard EL34’s I purchased to try in this amp. Grant Fidelity is closing these amps out for $999, down from its original $1,599. Here is a chance to get a deal on this amp with low hours and beneficial modifications. Below I have put the specs on the amp and the text from the original ad. Specs
• Class A single ended triode design
• Power output - SET 9watts per channel
• Auto-bias circuit
• 12AX7 as preamp tube
• EL34 driver stage
• Legendary 300B output stage
• Oversized transformer
• Dual RCA inputs to select with switch at front
• 4 ohm and 8 ohm speaker load
• No remote control
• Tube cage included
• Champane brushed aluminum faceplate
• Black painted metal transformer cover and case Tubes - (1) pair of Chinese 7025 (12AX7); (1) pair of Psvane EL34, (1) pair of Chinese 5Z3PA rectifier tubes, (1) pair of Psvane 300B tubes , (1) pair Mullard EL34
From Original Ad
“I am selling my Shuguang S300i that I purchased from Grant Fidelity. It is less that a year old. All tubes have less than 50 hours on them. They are all Chinese tubes with the Psvane logo - all are quiet.
Mods I have made: (1) added rubber isolation under the transformer cover. This fixed a mechanical hum (no, not a hum through the speakers). (2) Removed coupling cap on volume control PCB. This improved the sound. (3) added a feedback on/off switch. With feedback on (factory default) the amp has extended frequency response and tighter bass. With feedback off (modified setting) the amp sounds old fashioned, with slightly wooly bass and restricted high frequencies. This setting brings out the mid range qualities of the 300B tubes, so you may like it with certain types of music.
There is a small flake of paint missing on the transformer cover. The amp arrived like this. The tube cage and the transformer cover must have vibrated and touched in transit. I will pack carefully to prevent more damage.” Shipping – The combined weight of the amp box and tube box is 60 lbs.
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