Class A integrated power amplifier

If you have listened to any 300B amplifiers of BEZ, the T3B-5 model should definitely not be passed up.

It sounds amazing, rock solid bass, airy clean highs, huge soundstage that the features of 300B should have.

The circuit adopts alternating current(AC) to supply the filament of 300B. The design can max the power gain by 300B tube. It makes sure you get enough power for your speakers, meanwhile, lowest the hum level, guarantee the sounds quality.

2A3B is also available, only you need to do is to turn the AC switch from 5V(for 300B) to 2.5V(for 2A3B), and you can get another choice to enjoy your music. Hum level 2A3B is less than 2 mV when you are using 8Ω output, you can hardly detect any noise when your ears close to the speakers.

You’ll be astounded at the improvement in sound quality, dynamic range, meticulous transparency, completely demonstrate its high performance and analytical ability.

All point to point hand wiring feature always has better sounds than those amps using PCB.

The sound of the BEZ T3B-5 could also be better than amps which cost you 2-3 times from other factories.

Sounds is always our first target.



American made AB Carbon Resistor


Chinese high quality red resistor for military use


American DALE resistors

Power transformer: BEZ made 350WB6

BEZ made
Power Transformers

Available for tubes
(screening layer between primary and secondary)
Steel Sheets width× lamination (mm)


Size (mm)


Output transformer: BEZ made 18W single ended output transformer


BEZ T3B-5 Class A intergrated power amplifier gallary





300B X2,can be replaced with 2A3B, 2A3C (Adopt AC current as electron-tube heater supply, can be switch to 2.5V or 5V)

PSVANE 300B: Ceramic base Gold plaiting feet.

Russia 6r2 X2, can be replaced with 6G2P,6SQ7.

Russia 6л9 X2,can be replaced with 6P9P/6AG7/6AK7.

China Nanjing 5Z2P X2,can be replaced with 5U4G/5Z3P/5Z4P/274B.


Technical Data:

8 ohm output, tube 300B noise voltage lower than 5 millivolt

Tow groups of RAC input

Size: (CM)38X35X22.

Net weight:17.5KG

Gross weight: 22KG (with package)

Output power: 2 x 10 W

Power of output transformer: 18W singal end

Power transformer: 350W

Technical data

Output power: maximum 10W x 2
Frequency responds: 20Hz-30 KHz (±1dB)
Sensitivity: 0.4V
Distortion: when 4W, less than 1%
S/N ration: 90dB
Input impedance: 100K
Output impedance: 4 ohm/8ohm
Energy consumption: 168W




BEZ is an amplifier audio supplier. After establishing the team in 1997, BEZ quickly became a well-respected maker of amplifiers in China. We carefully select components in order to contribute to sounds qualities. These components could be new or used. The used components mainly come from military and they have outstanding performance on sounds. We measure, test and experiment our collections to provide more ways for hobbyist to enjoy music.



We use DHL/UPS/Fedex/EMS.

Item located at china warehouse and item will be ship from China.

Items will be posted within 3 business days after payment confirmed.

A tracking number will be provide to customer so customer can review where is the item till it will be delivered.

Once receive the package please check whether the amp is good or broken.

Please contact for any inquiries before the purchase - [email protected]


Return policy:

If the item shows up defective or damaged, please email us immediately.

We offer 1 years warranty for the amp (3 months for tubes).

Defective situation must be reported to seller within 14 days upon receipt.

Returned packages displaying an invalid or expired will not be accepted.

Returned item should be in its original box with all packing materials and shipped to us via traceable means.

We carfully inspect returned items upon receipt before issuance of refunds or exchanges.

Shipping and handling charges, insurance are not refundable in any case.

Buyer bears all shipping charges.

We are no responsible for any consequences if the amp has been modified and changed by customers.

If you have any question regarding the products and service, please email us through eBay system before you leave feedback. We will try our best to solve the issue with you.