Singxer SA-1 Fully Balanced Fully Discrete Class A Amp XLR 6.35 Single-Ended 4.4 Balanced Pre-Amp Amplifier
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1.Ultra-low distortion: THD+N -120db @1khz A weighting 20-22khz, When outputting 50mv at low gain, THD+N still has -96db @1khz A weighting 20-22khz.
2.Ultra-low noise: At low gain, the bottom noise is 300nv RMS A weighted 20-22khz,the direct test value of AP2522 is 0.66uv, At maximum output, SNR and DNR are 147db.
3.SA-1 adopts a true four-way fully independent fully discrete Class A amplifier circuit design, pure analog amplifier circuit and pure analog control, without EMI interference caused by digital control, in order to faithfully restore the analog flavor of music.
4.The amplifier circuit adopts the class AB architecture developed by ourselves. The differential input transistor adopts ROHM's ultra-low noise audio dedicated transistor. The transistors are purchased in large quantities and then selected by manual precision matching to ensure the consistency of the differential transistor. For other transistor, we use SMD twin transistor with excellent consistency to ensure better performance.
5.The final output circuit uses multi-stage current amplification, similar to the architecture of a high-power amplifier. Each channel uses 2 pairs of ON Semiconductor's 4A mid-power transistor to output in parallel to ensure low enough internal resistance and strong driving force; it can be done calmly even in large dynamics.
6.Perfect protection functions: overcurrent, overload, overheating, short circuit, DC protection, start-up delay, and the output relay can be cut off immediately when shutting down.
Multi-function and multiple play methods:
1. Support single-ended balanced input, free switching.
2. Support multi-output interface, XLR 4-pin true balanced, 6.35 single-ended, 4.4 balanced interface; also supports single-ended and balanced output as a front-end mode.
3. Support high and low gain design, you can easily connect all kinds of earplugs, super sensitive earplugs, etc.
4.When the gain is high, you can push a variety of big headphones, including a variety of high-resistance moving coils, low-resistance flat panels, and even ultra-low sensitivity headphones such as KK Earphone.
5.Support high and low impedance output, suitable for high-impedance headphones when high-impedance, and low-impedance headphones that require high current.
6.Large balanced output power:
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PO boxes or APO/FPO
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Estimated Delivery Time
For customers in the continental United States:
5 to 14 business days from the date of shipping
For customers in Hawaii and Puerto Rico:
2 to 4 weeks from the date of shipping
International customers can expect longer shipping times, depending on the country in which they live:
Canada: 1 to 3 weeks from the date of shipping
Australia, New Zealand, Germany, France, and the UK: 2 to 4 weeks from the date of shipping
Other countries not listed above: 3 to 6 weeks from the date of shipping
Please keep in mind that these are rough estimates and shipments can be delayed due to unforeseen circumstances, like postal strikes or severe weather.
If, for some reason, you don’t receive your order within the estimated time frame provided above and suspect that it might be lost in transit, please submit a support ticket from your transactions page and we can look into the order with the courier. Lost-in-transit requests must be submitted to SHENZHENAUDIO Support within 4 months of the date of shipping or before the courier archives the tracking information.
Easy 30-Day Return Policy
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Please read conditions below. If all conditions are not met, SHENZHENAUDIO reserves the right to refuse the return. All returned items must be in new condition, in their original unaltered box (including an intact UPC code) and must include all packing material, blank warranty cards, manuals and accessories. SHENZHENAUDIO can only refund the original purchase price. Shipping and handling fees are nonrefundable.
Defective or Damaged Items
Defective items may be repaired, exchanged or refunded at our discretion for the same model or manufacturer's equivalent model.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary. Please allow 3-5 business days for mail-in exchanges to be processed.
Refunds & Credits
Once we receive and inspect your item(s), we will credit your account. Please allow 5-7 days for a credit to appear on your account. In most cases, we will issue your refund in the same way you made the original purchase. Please note: we can only refund the original purchase price. Shipping and handling fees are nonrefundable.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
ShippingTo return your product, you should mail your product to: 4F 405, Building F, No.2 Shangxue Science and Technology North, Bantian Street, Longgang Dist, ShenZhen, 518129 Guangdong, China
If you’ve done all of this and you still have not received your refund yet, please contact us at firstname.lastname@example.org.