The Nobsound® 6J9 Vacuum Tube Integrated Amplifier is one of the most popular tube amplifiers on the market. This is because it comes in a small and simple package yet is capable of producing high fidelity sounds. It is proven to provide the great performance that audiophiles crave.
It is also designed to easily power high performance headphones and comes with 3.5 mm input and output jacks. Despite the many great features, it is sold at a lower price, making it a top option among consumers including those with limited budgets, and one of the best tube amplifiers under $400.
- Dimensions 6.1×4.9×3.7 inches
- Weighs approximately 12.8 ounces
- Features a straightforward and simple yet functional design
- Made of durable and high-quality materials
- Output power of 32 ohm
- Offers a headphone adapter impedance of 18-600 ohm
- Proven to lower total harmonic distortion to about 0.005%
- Includes a large gold-plated volume control knob
- Equipped with a single gold-plated 3.5mm input and output jacks
- Fitted with a big red power button at the back of the device
- Equipped with two 6J9 vacuum tubes
- The tubes can be replaced by E180F, 6688, 6ж9П and EF861
- Works well with high-performance headphones like the HD 580, HD 600, HD 650, Q 701, K 701, and K 702
- Includes a power supply
The Nobsound® 6J9 Vacuum Tube Integrated Amplifier is a preferred option by many audiophiles since it is relatively compact and lightweight. Despite its smaller dimensions though, the device was proven to be capable of delivering high-fidelity sounds.
In addition it can conveniently power almost all high-performance headphones particularly the HD 580, HD 600, HD 650, Q 701, K 701, and K 702 to provide users with the pristine performance they deserve.
Aside from that, the Nobsound® 6J9 Vacuum Tube Integrated Amplifier is also admired for its simple exterior design characterized by a gold-plated front that houses the 3.5mm output and input jack along with the large volume control knob that allows the user to conveniently adjust the volume to the desired level.
The device also comes with a bigger power switch button at the back. On top of that, it is sold at a cheaper price.
Aside from its long list of useful and desirable features, the Nobsound® 6J9 Vacuum Tube Integrated Amplifier also suffers from a number of drawbacks. First, it doesn’t come with an independent control knob for the base and treble as most of its rivals do. Second, it quickly goes out of stock and its unavailability leaves buyers with no option but to opt for another product.
Third, it is not eligible for shipping in some countries, which deprives buyers from various countries. Finally, the product is not sold with an applicable warranty to back it up.
Although it comes with a few downsides, The Nobsound® 6J9 Vacuum Tube Integrated Amplifier is still a favorite among audiophiles and stereo sound lovers with limited budgets since it is sold at a cheaper price yet capable of generating high-fidelity sounds. In addition, it is made of durable materials and does not damage easily.
On top of that, it is designed to work well with various high-performance headphones like the HD 580, HD 600, HD 650, Q 701, K 701, and K 702.
The Bravo Audio V1 Tube Driven Headphone Amplifier, the SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier, and the Nobsound MS-10D are among the top alternatives for a lot of audiophiles and high-quality sound enthusiasts. This is because both of these products are proven reliable and capable of producing the best sounds.
The Bravo Audio V1 Tube Driven Headphone Amplifier comes with dimensions 5.9×5.4×4.4 inches and weighs about 1.1 pounds. It is marketed as a Class A amplifier and takes pride in its audiophile performance. When used with compatible headphones, it is capable of producing dynamic, sweet and powerful tube sounds. It also makes use of the EH6922 tube that makes the device more stable and better quality.
The SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier on the other hand is sold with dimensions 8.7x6x4 inches and a weight of 1.2 pounds. It is designed to work well with 32-250 ohm headphones.
It comes with a 3.5mm input and output jacks and can be easily used to modify sounds according to user’ preferences. It can also be utilized as a pre-amp and must be matched with DAC when connected to a computer.
Despite the similarities of the dimensions, weight and features, the Nobsound® 6J9 Vacuum Tube Integrated Amplifier Mini Audio HiFi Stereo Headphone Amp proves to be the best option among the three since it is equipped with more advanced features and is reasonably priced.
The Bravo Audio V1 Tube Driven Headphone Amplifier is the second best option because it provides almost all of the desirable features of the Nobsound product at a much higher price. Although it is the cheapest among the three, the SainSonic 6J5 Class A Vacuum Tube Buffer Classic 47 Headphone Amplifier is the third best option since it is equipped with all the basic features expected of a good tube headphone amplifier.