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Noble 300B


Noble 300B Mono + Mono


With the goal of becoming the ultimate system for all our friends who enjoy listening to music, and the goal of achieving the ultimate sound we at UL Sound have been dedicated to the development of audio systems for the last 33 years and we promise that those who chose our sound systems have made the best decision and the music that is played using our product would be noticeably at a higher level.

The interstage transformer product we would like to introduce has been designed and produced just for you, and seeks to realize ultimate sound from the Apollon, the product realizes the characteristics of flawless data with no need for a building-out network allowing you to enjoy wideband sound no matter the product.

The product introduced by Apollon adopts the development of a transformer with a very high electromotive force to track ultimate sound, and consists of 14 transformers starting with the input transformer.


As an interstage transformer drive circuit without coupling condenser, this product optimizes the resolving power of sound, optimizes the integrity and spirit for sound quality.

The Amazing Power Amp can self-diagnose and adjust to minimize inconvenience that stems from using the amazing power amp with the vacuum tube amplifier making it easy for anyone to use it to achieve optimized sound quality, it has been specially designed to be accessible by those without much technical knowledge thanks to the diagnosis and optimized control, and it has been designed so that flow of current from the outflow vacuum tube can be optimized by the user, and of course the hum of the output vacuum tube can be self diagnosed allowing for randomized-control while looking at the data.



<<< Question. Is is possible to get a refund if the product falls below expectations? >>>


If after purchase any of our friends who purchased our product seeking the ultimate in music sound found the characteristics of the product fell below expectations we can offer a refund and after confirming that the product is not damaged in any way we can refund 100% of the cost.

We place a priority on trust and reliability with the Apollon.



<<< Question. What is the after sales service period and how can I apply for it? >>>


There is a 5 year warranty on the product after purchase.

But damage to the vacuum tube and other parts of the device can be repaired for a fee.

The shipping costs will be borne by the customer.


<<< Question. How do I go about best matching? >>>


The preamp best product that utilizes the Amazing Power Amp in this product is recommended to be used as the Amazing & Noble Free Amp from among our preamp Products.

The power amp of this product has a propensity to exceed the ordinary and has the balance input and unbalance input so unless there is a flaw in the preamp fresh sound can be achieved no matter what product you use.

Upper tones are especially good even with the transistor preamp.

But, ultimately we recommend that you choose the Amazing (Noble) preamp because you can expect 10 times the results when compared to the price.


<<< Question. What kind of speakers do you recommend? >>>


We recommend speakers with an efficiency of 85dB or more, and high efficiency speakers are a particularly good match.

Look for the speakers made by Apollon if you truly want to feel the heart of the song that transcends time and space and are craving the ecstasy of crossing into the realm of the Gods.

We promise you will be more than 10 times more satisfied with the trust Apollon grants you.



<<< Question. What are the disadvantages of this product's circuit? >>>


Before purchasing this product it is imperative that you track the information about the sound characteristics and frequency characteristics of the power amp that adopts the interstage transformer.

There are many advantages, but to name one disadvantage it would be that the circuit is mounted to the interstage transformer.

What are the results of the information tracking?

The Apollon devices we produce and display have a deviation in data characteristics of 0.5%.

That is ahead of the products you have used up until now.

The choice is yours, but after choosing the Apollon you be fortunate to discover that we kept all our promises, not to mention the happiness of music that transcends time and space and crosses over into the 4th dimension.


<<< Question. How durable is the product? >>>


The product has been built up so much that it weighs a total of 28 kg.

We guarantee the product will not be strained even if you use it every day for 22 hours.



<<< Question. How do I go about making a purchase? >>>


If you leave a product inquiry or purchasing inquire by accessing the online inquiries window and we will do our best to answer the questions of seekers of the ultimate sound.

All Apollon products are handmade. We can guide you through the purchasing process if you would like to make an order and we can explain the process if you are curious.



Noble 300B
Input Impedance 600 Ω/ 100KΩ
Input Sensitivity 800mV
Inputs Unbalance RCA / Balance XLR
Rated Output Power 25w x 25W
Output Impedance 4Ω 8Ω 16Ω
Output Voltage
A-1 CLASS Push Pull Monoblock + Monoblock Method
Frequency Response 1 WATT 20Hz ~~~ 20Khz +/- 0.2dB 15 WATT 20Hz ~~~ 20Khz +/- 0.8dB
Signal-to-Noise Ratio -95dB
Hum and Noise 0.0007V
Total Harmonic Distortion
Tube Complement Microwaves vacuum tube 12AU7, Drive Vacuum Tube E80CC,Vt137
Tube Complement 300B X 1Pair, Rectifier Tube 83
Power Consumption 180W
Optimum Tuning Bias electric current is practicable to make free adjustment from mini 125mA to maxi 140mA and is set at 130mA When delivering good
Operating Voltage 220V
Dimensions 420 wide ×260
Net Weight 28Kg X 2
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