Description
Hot Digital FiiO K9 Pro ESS Desktop DAC and Amplifier, Precise Design, Fully Differential Used SKU: FIIOK9PROESS_FCLN Features Power supply to ensure excellent soundFeatures low-frequency transformerUses THX AAA 788+ chipsCan produce an undistorted 1100mWCan produce undistorted 2100mW under a 32 ohms loadEnsures minimal interference between different componentsPCB of the K9 Pro ESS uses a partitioned layoutAudio signal goes through a mammoth 6-stage circuitSix-stage audio circuit, to reveal every last detailRGB indicator lights light up differently as per sampling rate Product Description Electricity is the mother of sound, so special attention was paid to optimize the FiiOK9 Pro ESS Desktop DAC and Amplifier’s power supply to ensure excellent sound. The FiiO K9 Pro ESS’s linear power supply, with its low-frequency transformer and 4 massive 4700uF capacitors, makes sure that the rest of the system gets abundant clean power.THX AAA 788+ Chips The THX AAA 788+ chips used in the FiiOK9 Pro ESS Desktop DAC and Amplifier provide exemplary details and dynamics no matter if you are using low or high-impedance headphones. The K9 Pro ESS can produce an undistorted 1100mW as tested in FiiO Labs under balanced out under a 300 ohms load, and an undistorted 2100mW under a 32 ohms load, 50 percent higher than the original THX AAA 788 amplifier chips.Precise Design Fully differential signals go through the DAC, volume adjustment, and amp for a truly balanced design. Such a design ensures minimal interference between different components in order to fully maintain all details and large dynamic swings in music for unmatched sound quality.Fully Differential, Fully Balanced Design The PCB of the K9 Pro ESS uses a partitioned layout, wherein not only the power supply and signals are separated, but the analog signal loop is also put in an independent section, guaranteeing the integrity of the audio signal being processed. Every audio signal goes through a mammoth 6-stage circuit to reproduce music as faithfully and as detailed as possible. The six-stage audio circuit reveals every last detail.Indicator Lights The RGB indicator lights surrounding the volume knob can light up differently depending on the currently playing sampling rate. Whats in the Box FiiO K9 Pro ESS Desktop DAC and Amplifier Specifications FiiO K9 Pro ESS Desktop DAC and AmplifierForm factor: TabletopNumber of headphone channels: 3-ChannelRecommended headphone impedance: 16 to 600 ohmsHeadphone output power:1/4 inch unbalanced: ? 1.1 W into 16 ohms (1% THD)1/4 inch unbalanced: ? 2.1 W into 32 ohms (1% THD)1/4 inch Unbalanced: ? 281 mW into 300 Ohms (1% THD)4.4 mm balanced: ? 1.1 W into 16 Ohms (1% THD)4.4 mm balanced: ? 2.1 W into 32 Ohms (1% THD)4.4 mm balanced: ? 1.1 W into 300 Ohms (1% THD)XLR balanced: ? 1.1 W into 16 Ohms (1% THD)XLR balanced: ? 2.1 W into 32 Ohms (1% THD)XLR balanced: ? 1.1 W into 300 Ohms (1% THD)Digital ChipsetDAC: 2 x ESS ES9038PROUSB: XMOS XUF208Bluetooth: Qualcomm QCC5124Analog CircuitryLow-pass filter op-amp: 2 x OPA1612Volume IC: 2 x NJU72315Power amplifier op-amp: 2 x THX AAA 788+ConnectivityAnalog audio I/O:1 x 4.4 mm TRRRS balanced stereo line input1 x stereo RCA line input1 x stereo RCA output2 x XLR 3-Pin balanced mono output (1 stereo pair)1 x 4.4 mm TRRRS balanced stereo headphone output1 x 1/4 inch TRS unbalanced headphone output1 x XLR 4-Pin balanced stereo headphone outputDigital audio I/O:1 x TOSLINK optical S/PDIF input1 x RCA coaxial S/PDIF inputUSB:1 x USB-B 2.0 (Digital Input, Update)1 x USB-C (Digital Input)Other I/O: 1 x Coaxial SMA AntennaWireless connectivity: Bluetooth (audio streaming, mobile app)Bluetooth: 5.0Supported audio codecs: AAC, LDAC, SBC, aptX, aptX Adaptive, aptX HD, aptX LLPerformanceFrequency response:RCA line outputs: 20 Hz to 20 kHz -3 dBXLR line outputs: 20 Hz to 50 kHz -1.5 dB1/4 inch headphone outputs: 20 Hz to 50 kHz -1.5 dB4.4 mm balanced headphone outputs: 20 Hz to 50 kHz -3 dBXLR balanced headphone outputs: 20 Hz to 50 kHz -3 dBMaximum output level:RCA line: 2.5 Vrms (10-Kilohm Load, 1 kHz)XLR line: 5 Vrms (10-Kilohm Load, 1 kHz)1/4 inch headphone outputs: 26 V p-p4.4 mm balanced headphone outputs: 52 V p-pXLR balanced headphone outputs: 52 V p-pImpedance: Headphone/balanced headphone outputs: < 1 Ohm (32-Ohm Load)THD+N:RCA line: < 0.00042% (A-Weighted, 1 kHz, 10-Kilohm Load)XLR line: < 0.00025% (A-Weighted, 1 kHz, 10-Kilohm Load)4.4 mm line: < 0.00025% (A-Weighted, 1 kHz, 100-Kilohm Load)1/4 inch headphone: < 0.00033% (A-Weighted, 1 kHz, 32-Ohm Load)4.4 mm balanced headphone: < 0.0003% (A-Weighted, 1 kHz, 32-Ohm Load)XLR balanced headphone: < 0.0003% (A-Weighted, 1 kHz, 32-Ohm Load)SNR:RCA line: ? 123 dBAXLR line: ? 128 dBA4.4 mm line: ? 128 dBA1/4 inch headphone: ? 129 dBA4.4 mm balanced headphone: ? 123 dBAXLR balanced headphone: ? 123 dBANoise:Line outputs: < 1.9 mV (A-Weighted)1/4 inch headphone: < 2mV (A-Weighted, Aux In)< 3 mV (A-Weighted, USB/SPDIF/BT In)4.4 mm balanced headphone:< 3 mV (A-Weighted, Aux In)4.5 mV (A-Weighted, USB/SPDIF/BT In)XLR balanced headphone:< 3 mV (A-Weighted, Aux In)4.5 mV (A-Weighted, USB/SPDIF/BT In)Crosstalk:RCA line outputs: ? 115 dB (1 kHz, 10-Kilohm Load)XLR line outputs: ? 125 dB (1 kHz, 10-Kilohm Load)1/4 inch headphone: ? 75 dB (1 kHz, 32-Ohm Load)4.4 mm balanced headphone: ? 114 dB (1 kHz)XLR balanced headphone: ? 114 dB (1 kHz)Channel balance: 0.5 dBDigital AudioSample rates:USB input: Up to 384 kHz (PCM)Up to 11.2 MHz (DSD)Optical S/PDIF input: Up to 96 kHz (PCM)Coaxial S/PDIF input: Up to 192 kHz (PCM)Bit depths: Up to 32-Bit (PCM)CompatibilityOS compatibility:WindowsmacOSiOSAndroidPowerPower requirements: AC InputAC input power: User selectable: 110 to 230 VAC, 50/60 HzPhysicalDimensions: 7.9 x 8.8 x 2.8 inch (200 x 224.5 x 72 mm) (without Feet)Weight: 6.1 lb (2.8 kg) Shipping Payment Returns Shipping for this Auction is FREE in the Continental US Lower 48 states only. Shipping Fees include all Handling & Insurance. Domestic Shipping to lower 48:All Shipping Prices Include Shipping Handling and Insurance Domestic Shipping to Alaska, Hawaii, Puerto Rico and US Territories:The free shipping is for the lower 48 only. Shipping to APO/FPOs: In order to get a quote please e-mail us with your APO/FPO zip code first. We will respond with the shipping cost. Please note there are some locations we will NOT be able to ship to. The free shipping is for lower 48 only International Shipping: Paypal is our only accepted from of payment . Shipping charges only cover the cost of shipping and insurance. HotDigital is not responsible for any customs/duty/tax/brokerage fees that may be incurred. These are the sole responsibility of the buyer. As these fees are assessed by each country we are unable to quote a price for or control them. We can only ship to addresses which are Confirmed or Verified through PayPal. We cannot declare items at a lesser value or as gifts. Tax: NY & NJ State Residents please add your local Sales Tax. Hotels: We DO NOT Ship to Hotels. Express Shipping: Express Shipping is for the lower 48 states only. There is no express shipping available for Alaska, Hawaii, Puerto Rico, U.S. Territories and International orders. Paypal: Feel free to use Paypal to pay for your auction. For customer service please contact us through eBay Messages Immediate payment via U.S. PayPal account is required. (No International PayPal accepted). If you need special arrangements, please contact us through eBay Messages. After your order has been shipped, you will receive an e-mail with the name of the carrier and the tracking number, so you can track your package.If you are not satisfied with any part of our service we would appreciate if you would contact us first to correct the problem, prior to your leaving your feedback. Returns are permitted If you are not satisfied with your purchase and must be initiated by the buyer within 14 days from delivery date. For Domestic Purchases: If you are not satisfied with your purchase, you may return it (see exceptions in Paragraph g) below) within 14 days of receipt, for a refund, or a replacement - subject to the following: a) Contact Hotdigital to receive a Returned Merchandise Authorization (RMA) number, to ensure proper handling of the return and/or replacement. Products cannot be returned without an RMA number. b) In order to be eligible for a full refund, less shipping expenses, your returned merchandise must be in its original unopened mint condition, as shipped, with all packaging, manuals, and paperwork intact and unaltered. Items removed from their blister-pack display packaging are non refundable. c) Customers remain responsible for the shipping and handling expenses incurred in shipping the item to them. If an item is offered with Free Shipping, this means we are paying the freight on your behalf. If that product is returned for a refund, the shipping expenses incurred, will be deducted from the refund. If an item is refused, the carrier bills us for shipping both ways, and these expenses incurred on your behalf need to be deducted from your refund. d) The issuance of an RMA# does not guarantee final disposition, as all returns are subject to our inspection. If the product you are returning is not in brand new, mint condition, as per Paragraph b) it is non refundable and can be picked up of subject to at least 15% restocking fee. If your return is missing accessory components, or shows signs of wear and tear - restocking fees will be higher. So please limit your Returns to unopened items in their original condition with all documentation, packing material, and accessories intact. For specific restocking fees that may be applicable to your Return, please contact us through eBay Messages e) Returns should be packed in an outer shipping carton, to avoid defacing the original box/packing of the product. The RMA# should be clearly inscribed on the shipping label. A copy of your invoice and Order # should be included, and your Return should be insured, with shipping costs pre-paid. We cannot accept any COD shipments. g) There are product categories which are not returnable, due to hygienic, sanitary, or other reasons, as required by the respective Manufacturers. Please review the categories below to make sure that your purchase qualifies to be returned. Purchases from these categories are final. In case any of these items is defective, Customer must return them to the respective authorized service centers, for repair or replacement at the option of the Manufacturer. These items cannot be returned to the Merchant. For Warranty information, merchandise Damaged in Transit, or Order Cancellations, please contact us through eBay Messages. In an event where there is an error regarding a price error or description we will notify you ASAP. In this event there will be no obligation to proceed with the purchase. Any amount charged to the customer will be 100% refunded. For International Purchases: Returns will be accepted within 14 days of the receipt of the item. In order to be eligible for a refund your returned merchandise must be in its original unopened mint condition, as shipped, with all packaging, manuals, and paperwork intact and unaltered. Items removed from their blister-pack display packaging are non refundable. Buyer must pay return shipping via the same method originally shipped.
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