Description

SAFE & SECURE SHOPPING 100% SATISFACTION GUARANTEED FAST SHIPPING Store Categories Store Categories You may also like You may also like Lower Duct Hose for Shark Rocket True Pet Slim Vacuum HV300 HV322 320 380 380UK 9.95 USD 1:72 Scale US SBD-3 Dive Bomber Fighter Alloy Aircraft Model Military Plane NEW 45.57 USD 3.89 USD 20pcs Bronze Watch Parts Steampunk Cyberpunnk Cogs Gears DIY Jewelry Crafts 3.17 USD 3.89 USD Generic Part Watch Balance Wheel Hairspring For ETA 2824-2 2834 2836 Movement F 6.35 USD 3.89 USD Durable Abrasive Mounted Stone For Rotary Tools Grinding Stone Wheel Head Dremel 9.95 USD Waterproof Rubber O Ring Watch Crown Assorted Watch Head Ring Seal Gasket Kit 13.13 USD 6K4 Tube Preamplifier Amplifier HiFi Tube Preamp Audio Amp Home Theater Assembly Product Description Features: 1. High-quality materials, experience enhanced audio fidelity, restore true sound 2. Stable product performance, upgraded for a variety of models of bile ducts 3. Preamplifier frequency response 5HZ-500KHZ, as long as your ears can hear the frequency through the preamplifier is also the same as can be heard 4. The preamplifier has a toggle switch with three adjustable stages, which you can freely adjust according to your own preferences and audio settings. 5. Wide range of applications, support any low-level signal input. Parameters: Power supply: DC12-16V Current: ≥1A 1. This line uses the DC boost line power supply DC12V can be boosted to more than 120V power supply; single DC12V1A (DC12V1A), the current is not limited, the voltage does not exceed 16V preamplification; voltage amplification 5 times, amplification is a little big, hear the distortion can be reduced in moderation volume 2 preamp working condition: full-frequency output, full-frequency output does not exist there is a lack of any frequency, if you hear the high and low frequency which is less, please check your equipment preamp sensitivity: up to the effective 3V is not distorted! 3. Tube preamplifier is a class A amplification state (that is, the preamplifier is always amplified state), the signal line is recommended to use the line with shielding, otherwise it may produce interference with the sound and so on! Instructions for use: 1. Locator with switch: twist the knob clockwise to "tick" a light, which is the smallest volume, continue to clockwise twist to increase the volume! 2. Tube filament: tube to be inserted into the end, boot to see the tube filament light red, note that the backlight is also red, to tube filament light machine only operation 3. audio output input: close to the power connector side is the output, the output should be connected to the amplifier or active speakers, the input to the audio source: such as mobile phones, CDs, computers, TVs, MP3 and other low-level signal input 4. DC input, using DC3.5/5.5*2.1 socket 5. Left and right channel inputs are audio signal inputs, which can be connected to low-level signal inputs. 6. The left and right channel outputs are audio signal outputs, which can be connected to the audio signal inputs of amplifiers or active speakers. 7. Before this stage with amplification function, if your audio source itself with noise, it will amplify the noise that comes with the audio source, so please use a good audio source to test. 8. The product we have been rigorously tested to ensure that there is no problem before the issue of the machine does not come with the noise, if you encounter the above problem can be excluded from the test method Package include: 1* Preamplifier Payment Shipping Returns Contact Us Payment We accept all verified payments from ebay. Orders will be shipped after receiving cleared payment. Payment due within 7 days after auction ends and for buy it now listings. Shipping We ship most of our orders within 24 hours, and may up to 48 hours. If you want faster shipping way, please contact us before making a payment. Sometimes due to problems with our transportation company system, your shipping information may be delayed to update. We recommend that you try again after 3-4 days. If you still haven't checked the shipping information, you can contact us via ebay message. Returns Always believe we can figure things out with communication, but if it comes to return, the pacakge must be intact and the same as you receive. If you have any questions, please feel free to email our service specialists 24 Hours a Day, 7 Days a Week. We will reply you ASAP. Return/refund is accepted within 30 days after the buyer receives the item. NO exchange will be accepted after 30 days from the date when the item is received. Please contact us first before returning your product!!! Contact Us If you have any questions, you're welcome to email us. We strive to answer all questions and resolve any problems as quickly as possible. You can contact us 7*24, we will reply at the first time, and we will surely solve your problems. Copyright © 2022 Tongtool