This is a review and detailed measurements of the Juson Audio JTA35 stereo hybrid tube amplifier including DAC, Bluetooth, Phono input and headphone out. It was sent to me by the company and costs US $180.
As if all that functionality was not enough, we even have a pretty VU meter! And oh, motorized volume control remote control too!
There is even subwoofer out!
Overall build feels good and polished. Speaker terminals are oversized for class (good) and we even have built-in power supply. Let's see how it measures.
Juson Audio JTA35 Measurements
Let's start with the power amplifier:
Don't expect super clean performance from a tube amp especially at this price and that is what we get. Noise is high and shows up in our SNR tests:
Distortion is fortunately frequency independent:
Crosstalk is poor:
Frequency response has peaking at the low and upper end:
Impedance is low though as we see from difference between 4 and 8 ohm. There is a sharp cut off which existed even when I switched to digital input:
Here are the power sweeps:
If we allow more distortion, power increases with good bit of heardroom:
Interestingly we get almost the same amount of power into 8 ohm (we are current limited):
Same voltage advantage exists when testing headphone out with more power delivered at 300 ohm:
Finally, I tested the RIAA equalization using phono input:
Kind of strange response with channel mismatch.
Conclusions
It is hard to imagine so much functionality being in such a reasonably priced but quality (physical) implementation. It even went after the soft spot in my heart with that VU meter. The other part of my heart was not pleased with measurements that are lackluster across nearly entire suite. Company support has been fantastic though and when I gave them the option to ditch the review they chose to have it be published anyway! Not enough companies send me products and fewer still don't mind results like this. For this, they need to be praised. Hopefully future products will have better objective performance.
Not having any use for tube products, I can't recommend the Juson Audio JTA35. If you are situated otherwise and looking for a very low cost of entry and high functionality, you may dig what JTA35 has to offer.
Manufacturer Specifications are provided in post #9 below.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
As if all that functionality was not enough, we even have a pretty VU meter! And oh, motorized volume control remote control too!
There is even subwoofer out!
Overall build feels good and polished. Speaker terminals are oversized for class (good) and we even have built-in power supply. Let's see how it measures.
Juson Audio JTA35 Measurements
Let's start with the power amplifier:
Don't expect super clean performance from a tube amp especially at this price and that is what we get. Noise is high and shows up in our SNR tests:
Distortion is fortunately frequency independent:
Crosstalk is poor:
Frequency response has peaking at the low and upper end:
Impedance is low though as we see from difference between 4 and 8 ohm. There is a sharp cut off which existed even when I switched to digital input:
Here are the power sweeps:
If we allow more distortion, power increases with good bit of heardroom:
Interestingly we get almost the same amount of power into 8 ohm (we are current limited):
Same voltage advantage exists when testing headphone out with more power delivered at 300 ohm:
Finally, I tested the RIAA equalization using phono input:
Kind of strange response with channel mismatch.
Conclusions
It is hard to imagine so much functionality being in such a reasonably priced but quality (physical) implementation. It even went after the soft spot in my heart with that VU meter. The other part of my heart was not pleased with measurements that are lackluster across nearly entire suite. Company support has been fantastic though and when I gave them the option to ditch the review they chose to have it be published anyway! Not enough companies send me products and fewer still don't mind results like this. For this, they need to be praised. Hopefully future products will have better objective performance.
Not having any use for tube products, I can't recommend the Juson Audio JTA35. If you are situated otherwise and looking for a very low cost of entry and high functionality, you may dig what JTA35 has to offer.
Manufacturer Specifications are provided in post #9 below.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
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