Laochen 300B Tube font b Amplifier b font HIFI EXQUIS Single ended Class A Handmade OldChen
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Laochen 300B Tube font b Amplifier b font HIFI EXQUIS Single ended Class A Handmade OldChen

Laochen 300B Tube Amplifier HIFI EXQUIS Single-ended Class A Handmade OldChen Sliver Amp

100 % of buyers enjoyed this product!
Availability: in stock
Price:  US $449.00 / piece
Sale Price:  US $386.14 / piece
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45 days Money back 45 days Money back Returns accepted if product not as described, buyer pays return shipping; or keep the product & agree refund with seller.
On-time Delivery On-time Delivery
Guarantees: On-time Delivery 60 days

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​Manufactuer “LaoChen” have 3 brands name: “Oldchen” , “LaoChen”, “Aiqin”
So for this product, we have some amplifier maybe come with “Oldchen” words on the front plate , and others come with “LaoChen” , please pay attention,

With All Tubes option is with all tube

Bluetooth With Tube version is with all tube and Bluetooth module ,

Without Any Tube version is without any tube and nor Bluetooth module


  • Voltage tubes: 2 x Special customize SHUGANG or Russian 6SN7/6N8P/6H8C
  • Rectifier tube: 1 x Special customize SHUGANG made 5U4G/5Z3PA
  • Power tubes: 2 x PSVANE’s “special customize for Aiqin 300B-SE” power tube
  • Output power : 8Wx2,
  • Power transformer Power: 150W
  • Frequency response: 15Hz-35KHz
  • Output Impedance: 4 ohm, 8 ohm
  • Total Harmonic Distortion: ≤ 1% (1kHz)
  • Input Impedance: 100K ohm
  • Input Sensitivity: 500mV–2000mV
  • SNR: 88db
  • Size (W × D × H): 370mm × 250mm × 220mm
  • Net weight: 16 kg
  • Tube protection grille 3kg
  • Chassis Color: Black Version
  • Input voltage: costomize for 110-240V/50-60hz


  • PSVANE’s speacial customize of Aiqin 300B-SE offer a better vocal and very fine sound effect, have a similary quality than PSVANE 300B-UK.
  • Using SPRAGUE, TRW, CE, MALLORY special audio capacitors in the machine
  • Output transformer: 86*50, 0.35mm Z11 Japanese steel with OFC wires
  • Powoer transformer: It is also use 0.35mm steel with OFC wires
  • Gold plate connection for all connections
  • 3 inputs source with swither
  • Free offer tubes protection grille
  • All electronic component are high level quality
  • Aiqin’s 300B tube amps are already one of leader of chinese market
  • AIQIN is well-known brand in china, this 300B tube amplifier is sold a few hundred per month. Since 2006, its EL34 series is already sold more 10milles copies.
  • She is made by the most famous Chinese brand AIQIN, and it’s the China ‘s best-selling hifi tube amplifier!
  • This amps’s development and marketing time has more than 10 years, it has been very mature, has received a lot of suggestions for improvement by hifi buyers, many buyers have been praised .

Inside view, the electronic components can be changed by manufacturer some similary quality components:

Good plug for tube seat:

HIFI EXQUIS use double package to ship this amplifier:

HIFI EXQUIS free offer you next tube protection grille(you don’t need to purchase it):

Click next photo to upgrade the original rectifier tube to PSVANE HIFI 274B:

Upgrade all tubes view: (if you want upgrade to 2x PSVANE Classic version CV181 TII preamp tube, it need 140usd, please contact us to more information )

You can find the upgrade tube option in the accessorie catecogy, else you can leave us a message

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 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

Speakers connection

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 or hifi.exquis AT 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 for same small change on exterior of product, like remove or add some print words, change some holes on chassis, but the product is the same. So picture is not contractual . 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. 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!

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Shipping Company Shipping Cost Estimated Delivery Time
DHL 3 - 7 days
UPS Expedited 3 - 7 days
EMS 5 - 14 days
Post Air Mail Free Shipping 15 - 45 days
Return Policy If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).

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Price:  US $449.00 / piece
Sale Price:  US $386.14 / piece
from AliExpress
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