Upgrade to use LM4766T to replace older LM1876T power chip
Design of materials:
- 1mm thickness steel plate using black spray process box .
- Using 8mm thick aluminum wire drawing process panel.
- The metal knob cap.
- The blue power indicator tube .
- power supply with low magnetic leakage toroidal transformer power supply.
- The volume is controlled by Taiwan WL or wizard potentiometer.
- Signal input shielded signal lines.
- The red Weimar, Germany WIMA MKP polypropylene capacitors coupled to do before and after class .
- pre-amp use 6J1 tube , which is an indirectly heated high gain beams shoot pentode , transparent sound bright , airy grainy good, then a transistor form , lower distortion , better sense of hearing .
- Power amp section selected U.S. National’s reputation tube flavor amplifier chip LM4766T, NS company has patented SPIKE sudden loss of instantaneous temperature protection circuit , overvoltage , undervoltage , overload protection, and monitoring transistor safe operating area protection, fade in, fade out squelch mode
- tube pre- regulator power supply uses high pressure to make noise to a minimum level .
- AC-powered filament and balanced ground , while maintaining the advantages of AC-powered warm timbre , and overcome the shortcomings of the DC power supply lead voice hardening and aging fast filament end .
- use of mature experience designing large power amplifier , so that the machine layout is very reasonable , although our whole range of products in the low-cost mini- amplifier , but in tone , SNR , frequency response , power and so it is not distorted admiration.
- The machine has increased the latest improved amp output function , the driving force is good, can be connected to 32-600Ω impedance range headphones.
- Rated output power : 2 × 30W (8Ω)
- Frequency Response : 20Hz ~ 30kHz ± 1db
- Total harmonic distortion : <0.1% (1kHz)
- Input Sensitivity : 500mV-2000mV
- Input impedance : 100KΩ
- Output Impedance : 4Ω, 8Ω
- SNR : 90dB
- tube + chip : 6J1 × 2 + LM4766T
- Dimensions (W × H × D ): 185 × 80 × 270mm
- Power input : 110v-240v 50/60hz
- Net Weight : 3.5Kg
- Front panel color: Sliver or Black
Tube Amplifier Precautions
1. Tube amp must connected with speakers before turning ON. Strictly prohibit send signals to amp without connected loads(speakers) or load short circuit when the switch is ON. (Hifi exquis 1101017)
2. Too high or too low power supply voltage does irreversible harm to the amp,preferably less than 5% of the specified voltage. If your mains voltage exceeds this value, often best to use with the AC power supply.
3. Temperature is higher when tube amps working, placing attention to ventilation, cooling. (Hifi exquis 1101017)
4. In the boot or just shut down for a period of time (within 30 minutes) Do not spill liquid on the tubes.
5. You should take about 100h time to operate the amp.RUN-IN to the amp gives it’s best and stable sound.so during the first 100h use time the sound maybe is not the best,you can also use your own run-in method.
6. If you donot sure how to plug the tubes, please contact us before try it
All tube amplifier used with stereo mode: L(left) and R(right) speakers.
Normally there are 6 speaker cable connectors: +8L, +4L, -0L, -0R, +4R, +8R
Example: +8L and -0L are for connecting with your Left 6-8ohms speaker
-0R, +4R is for connecting with your Right 4ohms speaker
Tube amplifier guaranty :
Tube amplifier Guarantee: 6 months for tubes sold with amplifier, 1 year for the amplifier and PSVANE tube
Conditions of Selling Article-1, Contact HIFI EXQUIS, Hello everybody, my name is FENG Lijun, I’m HIFI EXQUIS manager, Our team and me are always here , you are not purchasing via automate machie, but via us: real person, so thank u very much for choosing & trusting us. Our customer service is ready to help u, U can contact us any time by inside messager or by Email: contact AT hifi-exquis.com or hifi.exquis AT yahoo.com Article-2, Before Buying Please read cearfuly the below conditions, because validate the order by customer is equivalent to accept the selling conditions. Please read cearfuly the product page. If you don’t sure, contact us before buying.(HIFI EXQUIS) Article-3, Shipping. In term of delivery: We need time to prepare the order and arrange the sent of products and dealing with china local shipping. After the International warehouse delivery, we will provide u a tracking number in 3~6 days for the international shipping. Shipping delay, please contact us for resolve this problem (HIFI EXQUIS) Article-4, Taxe & Duties: We are not responsible for any Taxe, Duties or Customs fees, These charges are the buyer’s responsibility. In general we declare a lower value than real price. Any problem about the clerance process, Please contact us before contacting with customs.(HIFI EXQUIS) Article-5, Delivery. (Damaged, wrong product, sound is bad, no tracking information, package lost, apparence problem, shipping delay, etc) Any problem or dissatisfaction after received product, you must contact us in first before to give a negatif feedback or open a dispute. You can open dispute only when we can’t give your a satisfied solution! Article-6. Feedback is extremely important. If you are satisfied, please leave 4-5 stars positive feedback. Else you must contact us to resolve the problem with us.(HIFI EXQUIS) Article-7, After Selling, Guarentee 1 year for all product, excepte some product have different guarenty time, please find detail in product page. We have 3 after selling service point: in china Shenzhen, in Europe France Toulouse, and Canada Montreal and in the future in Russia moscow , so easy to return your quarenty product (HIFI EXQUIS) Article-8, We have not responsability of any small update of inside of product if the changing is not give any impact for the product quality. and nor responsability if manufacture change or remove some print word or change or add some holes on chassis but the product is the same. Company Information HIFI EXQUIS is a High Fidelity e-commerce store, we offer the exquisite equipement of Hi-Fi system and with both good quality and service. All our equipement are configured to fit with different countries and electric norms, and guaranteed you a risk free purchase and 100% satisfied. We also commit ourselves the best quality / price of the product for you. Our store is property of <Shenzhen XinHuoBan trade Ltd> Registed in ShenZhen china, for product store and shipping service; We co-work with French company: <Neopote > Registed in France for Europe pre-sale and After-sales services Have a good shopping!