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Item: 353723896503
Condition:New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is … Read moreabout the conditionNew: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller’s listing for full details. See all condition definitionsopens in a new window or tab
Number of Channels:2
Audio Outputs:Stereo L/R RCA
Hetian Mau’s:Hetian Mau’s
Audio Inputs:Stereo L/R RCA
Type:Tube preamplifier
Supported Modes:other
Receiver Combo Features:other
Number of Outputs:1
Color:Black
MPN:does not apply
Number of Inputs:4
Power:other
Surround Sound Formats:other
SENGTERBELLE:SENGTERBELLE
eBay Custom Duties & Taxes 1. Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer’s responsibility. 2. Avoiding some unnecessary trouble, please check with your country’s customs office to inform us what we should declare its value before shipping. Details： Output stage: The SRPP method is adopted, but the difference of this SRPP method is that there is no cathode resistance between the cathode of the upper tube and the anode of the lower tube. Different from general voltage amplification, the third-stage SRPP output stage does not have any voltage amplification effect. It is only used as a buffer stage to reduce the output impedance and increase the output current, but it can drive a stronger load than a normal cathode follower. The overall dynamic and high-frequency response are slightly better than M-7, and its analytical power and signal-to-noise ratio are higher. The design of PRT10A is loyal to the original amplifier circuit parameters without any adjustments; we have improved the power supply: High-voltage power supply: use a regulated power supply, and use MOS tubes as voltage regulators to make it more daring. Filament: One input and two output two sets of voltage stabilizers, which supply power to the left and right channel electron tubes respectively. Work voltage：AC115V and AC230V optional Tube model：shuangguang 12AT7 *4 or PSVANE ECC81 *4 Size：320x92x308MM (W*H*D) expect RCA and knob Net weight：about 5.5kg Power supply: 30W Oxygen-free copper R-core transformer Delay：30 seconds Color：full black 4 way audio input + 1 way audio output Full aluminum chassis Gold copper RCA Refer Hetian Mau’s Preamp Circuit ，the sound is very good ！ Remote control volume control board: 128-level relay pure resistance shunt control The input and output impedance is constant, the step is 0.5db, and the total attenuation is 63.5dB. The resistance adopts American DALE/VISHAY precision resistance 4 ways audio input options 1 way audio output Remote control function: Power on/off Input choose Adjust volume Mute Memory One key return Encoder function: Press the power switch on the left encoder, and rotate the audio input left and right. Press the right encoder to mute, and rotate the volume left and right. Resistance:default 50K，can provide 100K,if need ,pls add a note ! Display：default red ，also can provide blue ，if need ，pls add a note ！ Package include: Finished Hetian Mau’s Preamp Circuit Preamplifier x 1 Remote x 1 (no battery) Not included AC power cord
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