BEZ Q6A pre-amplifier

This BEZ Q6A pre-amplifier base on a world popular circuit and modified by BEZ. It sounds like a best tube pre-amplifier should detailed, warm and crystal clear.

It adops accurately measured and pair matched tubes, resistances and capacitors, guarantee the accurate and balance output of both right and left sound channels

It contains two groups of RCA sockets input

Tow volume controllers are located on left and right sides separately, minimising the negative effects on signal output.

Super low impedance 12UF oil filled capacitors coupling and plus tow groups of RCA socket input, it is capable to push 4 amplifiers at the same time.


What inside:

Chinese high quality red resistor for military use


Coupling capacitors: Western Electric, American SPRAGUE oil filled capacitors.


Power transformer: sealed power transformers disassembled from Chinese Military Radio 7512 model.

Stable voltage, between 80-230V is acceptable. There is no doubt that the Chinese military used 7512 radio power transformer has the best quality among most other transformers.

7512 military radio power transformer



Iron case seal, ultra high quality

Example circuit

Primary110/220V/primary 300V--0--300V,0.1A/6.3V,3.5A/5V,2A



The orignal circuit diagram as reference:

BEZ Q6A pre-amplifier gallary:

Technical Data:

6N8P X 4 also can be replaced by 6SN7/6N12P/6H8C

WY4PX2 also can be replaced by OD3/VT-139

5Z4PX1 also can be replaced by 5Z2P/5Z3P/5U4/U52/5Y3/5V4

Input Sensitivity:0.3V

Input Impedance:100K

Output Impedance:2K


Output Power:5V(Maximum 25V)Tips:Please check out the input sensitivity of your power a

mp before biding!

Frequency Response:20Hz-40KHz(+ -1dB)

S/N Ration:-100dB

Distortion:output 1V,lower than 0.1%/1KC

output 5V,lower than 0.2%/1KC

output 25V,lower than 0.5%/1KC

Power consumption:lower than 70W

Weight 11.8KG ,with packaging 15KG


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 confirmation.

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.