Un tres bon soundstage excellent pour le prix
| Item model number | XZ-E6 |
|---|---|
| Parcel Dimensions | 14.5 x 11.2 x 9.3 cm; 349 g |
| ASIN | B0BBV3KH7L |
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This item: Nobsound E6 Direct Heated Vacuum Tube Preamp Class A Stereo Audio Pre-Amplifier
$90.99
Get it by Monday, Jul 28
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This Item  Nobsound E6 Direct Heated Vacuum Tube Preamp Class A Stereo Audio Pre-Amplifier | Recommendations ![P1 Bluetooth 5.0 GE5654 Vacuum Tube Preamplifier Hi-Fi Valve Headphone Amplifier Wireless Receiver Audio Decoder Preamp USB DAC APTX-HD [Upgrade]](https://m.media-amazon.com/images/I/41jOxJ2jMgL._AC_.jpg) |  |  | |
| Price | $90.99 | $129.99 | $91.99 | $195.99 |
| Delivery | Get it by Monday, Jul 28 | Get it by Sunday, Jul 27 | Get it by Sunday, Jul 27 | Get it by Sunday, Jul 27 |
| Customer ratings | ||||
| Sold by | Douk Audio Direct | Nobsound Direct | Douk Audio Direct | Douk Audio Direct |
| connectivity tech | USB, auxiliary | Bluetooth, USB | — | Aux |
| brand | Nobsound | Douk Audio | Douk Audio | Douk Audio |
| output type | USB | USB | RCA | RCA |
| supported services | — | Pandora, Spotify | Spotify | Spotify |
| output wattage | 1 watts | — | — | 0.25 watts |
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Top reviews from Canada
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- Reviewed in Canada on March 1, 2023Verified Purchase
Top reviews from other countries
- STGReviewed in the United States on April 25, 2023
Unbeatable cost-to-performance ratio!
Verified Purchase - ganderReviewed in the United States on March 9, 2024
The bad, the ugly and the very good
Verified Purchase
UPDATE2: I received two matched pairs of the Russian version of this tube today. I tried to grind out the holes so they were bigger and I could put those metal cased tubes in directly, but the metal is too tough and I don’t have the proper tools to do that. then I removed the tubes from the metal cases on the Russian tubes and put those tubes in. Definitely less microphonic and they sound just fine. Of course mark the pins by the tube key with a marking pen and then mark under the tube so you know which way they go in when the case is removed. The tubes came from Bulgaria a month after I ordered them but I think it was worth it. Not a bad investment considering how good it sounds. Very good bang for the buck.ganderThe bad, the ugly and the very good
Reviewed in the United States on March 9, 2024
UPDATE: success in solving the second biggest problem. this is about the ringing and microphonics from the tubes. Shutting my amp down, it still had some juice, and then I touched the Nobsound preamp volume knob, and the ringing started. Then I realized I had some tube dampeners, which are things that clamp gently onto the glass part of the tube to reduce vibration. I stretched them out because these tubes are quite wide, got them to fit, put them on, started up the amplifier, and then I tapped the volume control, harder than I had before and little if any ringing happened. Problem for the most part solved. You might get some large tube dampers and put them on the tubes and see what happens. See attached photos.
Original post:
I ordered this because it is a DHT (Direct heated triode), preamp/volume control. A very unique type of thing that I don’t see often, and when I see them, they are high-quality and expensive. This does not fit into the high-quality category, but I thought I would give it a shot anyway because it is 鶹 prime and I can return it. I’m glad I tried it. I had a big long review here, and I will say some of it below.
Bottom line, if you get a very good power supply with it, which I did (but you need to get your own power supply anyway because it doesn’t come with a power supply), and you place it on a vibration absorbing pad/mat, which I also did, and you are gentle with it, then this could make your system sound great. I’m really loving the sound of it, even with the cheap Chinese problem-child tubes that come with it.
Pros:
1, it sounds excellent if set up right and handled gently. And better sound in an audio system is really what this is all about. This trumps almost everything.
2, it is very inexpensive. Less than $70 on 鶹.
3, the glow of the tubes looks nice, but the glow is not really the tubes; the glow comes from a diode glowing under the tubes, because the tubes are very low voltage and low current on the heater of the tube and they don’t glow when they are heated up, but it still looks cool.
Cons:
1, you have to buy a higher quality power supply, which I did, and that cost a little bit more than the preamp. For an extra $70, so what?
2, it is not really a preamp because it only has one input, but so be it.
3, you have to treat it very gently, and pair it properly with other Audio gear, to get that good sound, and to avoid the ringing that has been reported by many. I had to pair it with a very low power tube amp, with my very high sensitivity speakers. Don’t try to put it with a high-powered amp.
4, This is the worst part of the design I feel, even worse than the ringing problem: it puts out way too much voltage for most amplifier inputs. The volume level I use with my one watt tube amp is just past when it clicks on, very low. If you try to turn it up louder, it’s just too loud, which is not a good thing because it could overload the input stage of the amplifier.
5, if you don’t want the ringing, as reported by many, almost certainly caused by tube “microphonics“, which means that something is vibrating inside the tube itself to cause this, in addition to using vibration isolation techniques, you may have to get a higher quality Russian tube of a compatible type (you have to do your research on this; it isn’t hard to find), and that Russian tube is actually encased in metal. My Russian metal cased tubes are on their way via a slow boat from some Eastern European country. The metal tube is ugly. Regular glass tubes are cool in my mind. And the metal tube is too wide to fit in the recessed socket of this little thing, because of the tube metal casing. Either you have to remove the Russian tube from its metal case and I have no idea how to do that yet, or you have to drill the hole out in the preamp so it is a bit bigger and that is the last thing I would want to do; or get a loctal socket extender for the loctal Sockets. I haven’t been able to find that yet. They should’ve put the socket higher up so it’s just outside of the top of the case, as it is on most tube amplifiers, so that you could put any compatible tube in there. But I see why they did it for manufacturing simplicity. Or they could’ve made the hole a bit bigger, but they didn’t.
6, power up sequence: turn on your source first, then your dac if you have one, then the little DHT pre to its lowest volume level and let it warm up a bit, and then turn on your amplifier. Then start your music playing and adjust the volume.
7, Power down sequence: ALWAYS turn the amp off first; then turn off the DHT preamp, then the dac, and then your source.
Bottom line, is it worth it? I’m listening to it right now and it isn’t coming out of my system anytime soon, and I’m not returning it. But it really depends on your system. Don’t try to pair it with a high powered amplifier, and be very aware of your volume level so you don’t burn out the amplifier input section.
Four stars because of the ringing, and for all the things you have to tweak to get it to really sound good. But, you get what you pay for. In this case, I know a few things to do and I’m getting way more than what I paid for, in my opinion.
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- FlaCharlieReviewed in the United States on February 15, 2023
Clearing Up Some Confusion / Misinformation Re: Nobsound E6 Tube Preamp
Verified Purchase - Paid in FullReviewed in the United States on June 25, 2024
Uncontrollable howling/feedback noise...
Verified Purchase - 鶹 CustomerReviewed in the United States on November 17, 2022
Noisy and Ringing Sound
Verified Purchase
