Cayin C9ii Dual Nutube fully-balanced portable headphone amplifier

Description: Cayin C9II Gen5 Nutube 6P1 Portable Headphone AmplifierProduct Highlights1. Gen5 Nutube 6P1 Vacuum Tube Audio Circuit Cayin has applied this vacuum tube to multiple products, including the N8, C9, N8ii, and N30LE, and now the C9ii. After years of continuous circuit experimentation and technical refinement, Cayin has equipped the C9ii with an adjustable anode (plate) voltage feature and the highly praised Classic and Modern dual tube timbre. This adjustable plate voltage feature offers two levels: high and low.1.1 Dual Tube Timbre Circuit∙ Modern Sound: Introduces a large-loop negative feedback system, with total gain determined by the large-loop negative feedback circuit. By incorporating negative feedback over multiple amplification stages, the total harmonic distortion (THD) will be reduced significantly. The harmonic distortion characteristics and sound signature lean more toward a modern style, with greatly reduced thermal noise and a slightly cleaner tube sound. The original C9 was designed with a similar NFB circuit. ∙ Classic Sound: No large-loop negative feedback; each stage operates independently through local feedback, with the overall gain determined by the cumulative gain of each stage. The distortion characteristics of the tube amplification circuit dominate the sound signature, resulting in a higher THD value. The distribution of harmonic distortion and the sensor signature exhibit a classic vacuum tube amplification circuit, with relatively more thermal noise and a richer vacuum tube presentation. The N8 DAP was designed with a similar NFB circuit. 1.2 Anode (High/Low) Cayin introduces a new feature, “Anode” to C9ii. The High/Low adjustable anode (plate) voltage further enriches and refines the range of vacuum tube timbre. The working principle is that applying different operating voltages to the plate of the vacuum tube alters its operating state, ultimately affecting the sound signature of the timbre circuit. This mainly manifests in changes in audio linearity, and it will adjust the overlay, spectrum, amplitude, and ratio of second-order harmonic, resulting in perceptible audible differences.∙ Classic + Anode (H): The richest tube sound, with intense emotional depth, suitable for vocal music with a lot of details. ∙ Classic + Anode (L): Slightly lighter tube sound, suitable for vocals with thicker tones.∙ Modern + Anode (H): Less tube character, with moderate smoothing in the midrange and a slight sweetness added. ∙ Modern + Anode (L): Minimal tube coloration, without affecting resolution and definition.∙ Solid State sound: Balanced across the entire frequency range, musical without tube coloration.2. Fully Discrete, Fully Symmetric Differential Headphone Amplifier The C9ii's headphone amplification circuit is significantly different from that of the first-generation C9. While both amplifiers employ a fully discrete, fully differential four-channel headphone amplification circuit, the C9ii adopts a fully symmetrical circuit architecture. 2.1 Fully-symmetric Headphone AmplifierCayin has designed a three-stage amplification circuit to embrace the fully symmetric design into C9ii: a differential input stage, a voltage amplification stage, and a power driver stage. Stage One: Symmetric JFET Common-source Differential input amplifier.Stage Two: Symmetric BJT Common-emitter Push-Pull Differential Voltage Amplifier. Stage Three: Symmetric BJT Common-collector Push-Pull Parallel Current Amplifier(emitter follower).2.2 Negative FeedBack (NFB) The C9ii has an integrated precision control circuit that allows the headphone amplifier to operate in various modes such as NFB/LFB, Class A/Class AB, Hyper, single-ended, and balanced input/output modes.On the C9ii, when NFB is on (indicator light on), the audio output presents more spatiality with stellar dynamic range, excellent transient response, and relatively fewer harmonics, delivering more neutral sound with impressive detail and speed. Audiophiles frequently associate these changes with “higher resolution.” On the other hand, when NFB is off (indicator light off), the audio output displays richer harmonics. You can hear a more cohesive and full-bodied presentation, with stronger imaging and more textured and elastic mid-bass frequencies. Total Sound Shaping Options:Timbre: 3 options (Classic Tube, Modern Tube, Solid-state) Amplification Mode: 3 options (Class A, Class AB, Hyper) Anode: 2 options (High, Low) NFB: 2 options (On/Off) Input mode: 2 (Line, Pre) Payment Terms:1. We only accept paypal payment, other payment methods are not acceptable.2. Payment should be completed within 7 days of bid or auction closing. Or unpaid dispute will be filed for non-payer after 7 days of sales day. Shipping Terms:1. We ship to Worldwide. 2. We ship your orders within 1-2 business days after the payment cleared. 3. Item shipped from HONGKONG/Singapore / China / Post Airmail, reach most of the countries within 15 to 25 days. If some countries cannot send the default shipping channel. need to choose to send FEDEX, DHL, EMS express delivery, you need to pay additional shipping costs, and we will contact you by email for the specific amount. If you need to choose EMS/DHL/FEDEX, please contact us. But the need to charge additional shipping costs. 4. Deivery time depends on destination and other factors, it may takes up to 25 days. If you don't receive the item after 25 days, Please contact us, we'll investigate and solve the delivery problem. Return Terms:1. If you receive defective item, please kindly notify us within 7 days. We will guide you the returning instruction for replacement or refund.2. If you purchased in improper condition, please NOTE that the sipping and handling fee will not be refund,All costs incurred for product returns are to be paid by the buyer. (Return the resulting duties,) Guarantee the integrity of the returned product.all return shipping fee should be paid by the buyer unless item DOA.Please notice us within 3 days and return the case within 7 days after receiving (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.3.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.4.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. Warranty:1 year carry in warranty.Return and exchange item within 30 days of delivery if item not functioned.Buyer responsible shipping and handling fee.Buyers Please Note: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer responsibility.Please check with your country customs office to determine what these additional costs will be prior to bidding/buying. Custom Duties & Taxes:1. Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer's responsibility.2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping.3. If the condition of your purchase is incorrect, please pay attention to the resulting customs duties for the return, and the customs duties arising from the return should be paid by the buyer, unless the item DOA. Feedback:1. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.2. If you are satisfied with the product you received, please kindly leave us a positive feedback and 5 star DSR. If there is any problem of your order, please feel free to contact us firstly, we are responsible and credible seller, will follow it for you asap.

Price: 2699.99 USD

Location: shenzhen

End Time: 2024-12-01T14:25:09.000Z

Shipping Cost: 0 USD