Bluetooth Tube Amplifier Stereo Receiver - 1000W Home Audio Desktop Stereo Vacuum Hi-Fi Power Amplifier Receiver w/ 4 Vacuum Tubes, USB/CD/DVD Input, Subwoofer Output - Pyle PVTA90

One of the best sounding amps I've ever had yes it hums if you turn it up full volume, seems pretty normal for a tube amp. Honestly the frequency response from this amplifier is very exceptional. Exceptional speakers deserve an exceptional amp to match with it. 500% price to value ratio.

I will start by saying I'm pretty impressed. I just needed something to operate on Bluetooth and to run my turntable in my home office. I decided to try this little tube amp out. I knew the power ratings were way off. But I only needed it to run a pair of Polk TSi 300 towers. If it did well enough with those I would try the sub out. You will need it to run about 100 or more hours to truly know what the tube voicings will be. That is the normal break in period. I placed the two Polk Audio speakers next to the unit to try it out and search for distortion (first pic). Highs were crisp and clear. Enough mid range power to push these little towers. Plenty of expected bass for these speakers. Not booming but clear and punchy as you expect from woofers of this ilk (mid range quality). There is a significant drop off in signal strength between the Bluetooth and line in for a turntable. This turntable does hav it's own pream also. Again, this was to be expected at this price point. The sound was beautiful though. Clear, pure analog the way it was intended to be listened to. This I was not expecting.So I added the 10" subwoofer, corrected the phase, set amp gain on Sub to 25% and the same with the dB range on the sub. Knowing this unit was underpowered for what these speakers can handle i didn't want the sub to drown the sound out. The blend was excellent. I split the speakers off to good stereo distances and place the sub properly in the corner (second pic). The sound produced was very natural. Not overly processed even with Bluetooth feeds. The production quality was excellent for various music types. There was no adjusting of audio needed for latency. Thank God because this unit doesn't allow that. Overall I was really impressed at the functionality of this for the price. Estimated power is closer to 30-50watts RMS. Perfect for my mini towers in a small office space. I would not use this in a large room. I definitely couldn't run my Martin Logans off of it but for a decent set of mid range speakers you get more than what you pay for.

Pyle PVTA90 - this is an incredible 2-channel amp, featuring extremely clean, clear and warm sound- just the way it was recorded in the studio. This amp has multiple eq settings for matching best sound for the speakers, has plenty of power to drive high-end sound systems- even at the very lowest volume setting nothing drops out sound wise, just clean lower volume. Crank it up and there is no disappointment- plenty of wall-shaking floor rattling drive, even without the sub-woofer connected. Although the remote lacks on-off power button, the previous/next track feature is very convenient along with volume control.The Bluetooth connection is easy to setup, strong and clean. For the money, this is the best amp I’ve ever heard… and I’m an old school audiophile!

This seems like a great amp, I bought a “like new” open box unit from Amazon at a slight discount, and the packaging and physical quality of the amplifier are great! However Amazon clearly does not verify the condition of their open box returns, as it seemed like new until powered on and the power cycles off and on continuously every second with a loud pop. Of course there are no support options, and I waited a week for this open box amp to deliver instead of buying new for next-day delivery. Don’t make the mistake I did and trust Amazon’s “like new” condition of an open box item!

I employ this hybrid amp to power up a set of top firing drivers, in an old, yet recently refitted set of BSR-DR1550 speaker cabinets. The system is tri-amplified, with the PVTA90 powering only the mids, (1" PRV Audio horn midrange), and highs. (An Eminence APT50 1" HF driver) Both in waveguide horns. The amp delivers an incredible amount of power, for a 25 watt per channel into 8 ohms, amplifier. (50 watts per channel, into a 4-ohm load) The drivers are both very efficient, so the amp does a terrific job with the 25 watts that it delivers to both speaker cabinets. The input controls are self-explanatory on both the device and it's remote. I like the various EQ options, and the individual control over both the Bass and the Treble. My only problem with it is, that when I employ Bluetooth from my Android phones for Pandora or Spotify, that there is a noise or some type of interference being produced with the sound that's being emitted. (This issue was rectified by moving it away from another Bluetooth hybrid amp)The other issue is not knowing what vacuum tubes it employs. I've since found out which tubes it uses. And replaced them with EL 84s, (The rear tall ones), and 12AX7s, (The smaller fat ones in front), with the adaptor to go from the 12AX7 tube pin config, to the 6N2 pin config. These totally enhanced this amplifier's sound quality, 10fold. The sound quality with the new 12AX7s is amazing. It out classes my other two Aiyima hybrid tube amps, and that's enough for me. I'd certainly recommend it. Just be sure to change out the lower quality Chinese tubes with NOS American or Soviet made tubes. (From Amazon) You won't regret it. You can now find this amp for under $210.00. I paid almost $300.00 two years ago. But well worth it since the tube refit. I definitely recommend this amp for bi- and tri- amplification purposes.