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Portable Headphone Amp Amplifier for YULONG A1000 A1000 is a headphone amplifier with the external power to supply,although it has a small and exquisite size,its power output is very strong.In order to drive the headphone,the efficient swtiching power is used to be converted into the positive and negative power to supply the OPAMP and the eight transistors whose output current can reach 800ma.
The circuit structure:OPA2134 and BC337/338*4.
A1000 uses the universal high-quality external power supply which is AC 90V-270V, 50/60HZ.
The whole circuit uses the high-precision components with famous brands,QC is necessary before production,each of the components must be tested to achieve high performance index and adjusted by YuLong senior audio engineers before use.
All the machines must be passed through the 24-hour reinforcing experiment and examined by the dScope Series III digital audio analyzer critically.From production to voice adjusting to technical indicators and the stability of the machine,these procedures can guarantee the consistency of high quality.
The style of voice: clear and bright,elaborate and soft,natural and endurable,the whole frequency is equivalent, high frequency power supply can ensure enough power of the headphone output,low noise,fine transient response.Technical Specification. ●SNR: >-110Db.
●Crosstalk:-100db
●THD+N: 1KHz%0.002.
●Frequency response: 20-20KHz-0.1Db.
●power:<20W.
●Headphone’s out power: RMS：32R/1W，300R120mw, Peak：600R/400mw300R/600mW
●Dimensions: 110*80*30mm
●Weight: 200g.+ Packing:0.5KG
●power AC in: 80-240VAC/50-60HZ |
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PAYPAL Only --Buyer must pay using PAYPAL ONLY within 7 days from the date of transaction made. Full Payment --Transaction with insufficient payment will not be handled. So, please make you complete the full payment, including Final price + Postage. No Discount --No discount is offered for all transactions. Processing --We will arrange the dispatch within two working days after we receive the valid and completed payment. We accept PayPal payment ONLY which provides full-scale buyer protection policy covers up to ￡500, so bid with confidence if you have a PayPal account.
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Delivery address --When you make payment,Please advice shipping address,telphone number,Contact person,Input vol. Postage includes the actual postage and corresponding packaging fee and handling fee, which is coincident with ebay's regulations. Any doubts, please read the ebay's regulations carefully. We don't overcharge the cost. Please don't bargain or argue with us for this point. Shipping Method --Item will be shipped within 2 working days after FULL payment is received. It is noted that Paypal pending payment (such as eCheck) may take up to 5 working days to clear. What we used is Hongkong post small parcel, which may take around 7-21 days to arrive from the date of dispatch issued (This is for USA, CANADA, AUSTRALIA, EU, Asian Countries. For the other countries, it may take more time to arrive). No Combine Postage -- Combine postage is non available, even if you purchased several items per time, since AIRMAIL POST charges the postage based upon weight of the post, not quantity.
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We supply 1-Years Manufacturer Warranty ( Excluding contrived damagement or misusage). In case of DOA, Please notice us within 3 days and return the case within 7 days after receiving the items. (The date on Post Mark is for standard). After our receiving of the items in good appearance condition, you may have a replacement or refund as long as we cancel the order on ebay, and Shipping cost is non-refundable, as you know shipping & handling was paid to post office. If the item was sent back for repair, buyer pays for the returning fee. We will be responsible for 2nd shipping cost & handling. If you ask for replacement or repair after one month since you paid, you need to pay for the 2nd shipping cost & handling. If you have to return the item for the refund, you will pay a 20 % restocking fee. In order to provide you the best service , please treat the transaction fairly. Feedback is our life, before you leave a neutral  or negative feedback, please DO contact us to get a better solution, Because we don't want to get a NEUTRUAL feedback or NEGATIVE feedback. The address on the parcel is not ours, it is the postman, please DON'T SHIP TO THERE. Please contact with us for the return address before you return it, otherwise we can’t get the parcel you returned. Please contact us for return address before you send.
We strive for FIVE STAR Service in our descriptions, communication, shipping speed & costs! We know you have many choices on Ebay, and are most appreciative that you have chosen to shop with us.
You can bid and purchase with confidence, as WE are not satisfied until YOU are satisfied with your purchase! If YOU are not satisfied, please let us know so we can make it right! Please email me through "MY MESSAGES" if you have any questions about our listings or inventory! 
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Our Working Schedule | Bei Jing(CN) | Monday to Friday | 09:00 AM - 18:00 AM | New York(US) | Sunday to Thursday | 20:00 PM - 05:00 AM | London(UK) | Monday to Friday | 01:00 AM - 10:00 AM | Paris(FR) | Monday to Friday | 02:00 AM - 11:00 AM | Canberra(AU) | Monday to Friday | 11:00 AM - 20:00 PM |
During holiday ,pls allow us to response you early next week ,kindly not leaving negtive/neutral feedback or make dispute/claim out of our working hours, thank you for your cooperation. |
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