Description

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 We accept PayPal via eBay Secure Check-Out . Payment is expected within 7 days of auction close. Unpaid Items will be forfeited per eBay . Immediate payment needs to be processed for items with Add to Cart option so that any promotional discounts can be applied to your order immediately. 1.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. 2.Items will be shipped within 1-3 business day when we received payment. 3.Delivery time depends on destination and other factors; 4.International buyers please note: a.Import duties, taxes and charges are not included in the item price or shipping charges. These charges are buyer’s responsibility. We will try our best to reduce the risk of the custom duties. b.Please check with your country's customs office to determine what these additional costs will be prior to buying. We offer full refund 100% from the price you buy. You can return item within 30 days after items received. We do our best to value every customer a 5-star positive eBay experience by working hard and professional. We also provide accurate information for our products, prompt communication and reasonable and fair price (the balance between price and quality) to our customers. We are welcome and happy if you have any issues, problems or suggestions. Please feel free to email us thru eBay. If there is no response after contacting us several times, please check your email spam folder. Please DO NOT Leave us Neutral or Negative Feedback without telling us in advance. We will do our best to help you to resolve your problems. We reply any email messages within 1 business / working days; Our Business hours: Mon-Fri 9:00-18:00, UTC/GMT +8 hours. Payment We accept PayPal via eBay Secure Check-Out . Payment is expected within 7 days of auction close. Unpaid Items will be forfeited per eBay . Immediate payment needs to be processed for items with Add to Cart option so that any promotional discounts can be applied to your order immediately. Shipping 1.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. 2.Items will be shipped within 1-3 business day when we received payment. 3.Delivery time depends on destination and other factors; 4.International buyers please note: a.Import duties, taxes and charges are not included in the item price or shipping charges. These charges are buyer’s responsibility. We will try our best to reduce the risk of the custom duties. b.Please check with your country's customs office to determine what these additional costs will be prior to buying. Returns We offer full refund 100% from the price you buy. You can return item within 30 days after items received. Contact Us We do our best to value every customer a 5-star positive eBay experience by working hard and professional. We also provide accurate information for our products, prompt communication and reasonable and fair price (the balance between price and quality) to our customers. We are welcome and happy if you have any issues, problems or suggestions. Please feel free to email us thru eBay. If there is no response after contacting us several times, please check your email spam folder. Please DO NOT Leave us Neutral or Negative Feedback without telling us in advance. We will do our best to help you to resolve your problems. We reply any email messages within 1 business / working days; Our Business hours: Mon-Fri 9:00-18:00, UTC/GMT +8 hours. powered by