FX Audio TUBE-03MKII BT Tube Preamp & Headphone Amp
FX Audio TUBE-03MKII BT Tube Preamp & Headphone Amp
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Product Description
Between your audio player and your headphones, several pieces of equipment can improve your sound. If you’re looking for signature tube warmth, you can get them all in one device: the TUBE-03MKII from FX Audio Read More

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Gazabi
16
Oct 25, 2020
Does anyone know if the tuning knobs adjust the sound on all of the outputs?
Sunvalleylaw
1
Oct 22, 2020
Will this work with my HiFiMan HE-4XX headphones and support them well? I have some extra preamp tubes from my guitar amp that could be swapped in (vintage 12AX7 type). And was going to use my Meridian Explorer 2 as a DAC as between my computer and this. For audio listening, and also for “studio” listening for recording in GarageBand (maybe will be getting Logic later). Also was just thinking of getting one of the Topping or FiiO portables for use here and for carrying around. Obviously, I would not carry this around.
(Edited)
william4037
1
Oct 21, 2020
I am newbie, but can this be used as both a dac and amp or is it just a preamp and I still need a dac and amp?
InvisibleInk
51
Oct 23, 2020
Let's say for the sake of example that the source of your music playback is a laptop PC. The PC has a built-in DAC that sends an analog signal output through the headphone jack. In order to use this Amp directly with the laptop, you would need a cable which has a 3.5mm connector on one end (the laptop) and two RCA (Left & Right) connecters on the other end (for Amp). Then, what is typically done is to max out the volume on the PC as a proper setting for the Amp. Then you are all set. Technically, an additional DAC purchase is not strictly necessary. Enthusiasts generally prefer to introduce a DAC between the PC's USB output and the Amp. There are many reasons for wanting to do this, but it all boils down to whether or not the PC's own sound is good enough or not.
(Edited)
kii_kat
2
Oct 25, 2020
Thank so much!
ReadWryt
61
Oct 21, 2020
These tubes want 120 Volts at the plate and grid. How they derive that from 12 V @ 1 A is anybody's guess. This is what they call a Starved Plate design, and it doesn't really employ the tubes as anything but a cheesy trick. Whenever you see something purporting to be a "tube preamp", look for the hefty transformer needed to make a real tube pre work, that's your first tip off. This is less preamp and more of an Audio Effects device, but at $45...if it makes your material sound better to you, what does any of that matter in the long run?
Peccavi101
22
Oct 24, 2020
Yes, thank you, and I have seen that one and others like it and the power supply is obvious on some, but what I was wondering, and excuse my ignorance, for as an audiophile (long absent from that as my hobby/work) I had not spent much time exploring tube pre-amps, but though that perhaps some smaller units might be using an outboard PS (??), PLUS, of course there's quite a price difference.
ReadWryt
61
Oct 25, 2020
This demonstrates nothing that cannot be done with a quality solid state preamp though. Again, personal sound tastes aside, the tubes here are merely a gimick. Starved plate systems really don't do what a real, fully powered tube preamp does.
Stealthbushido
45
Oct 20, 2020
I own the nfj&fxaudio tube 03 model (purchased off Amazon) without the Bluetooth and it's hooked up between my dac & Amp in the unbalanced line. I've enjoyed this product and I haven't even tube rolled it yet. At this price for the Bluetooth model. What a deal. 🤘
wsturgiss
0
Oct 20, 2020
Deleting my comment because, well I was pretty much totally wrong. I'll just say I've been looking at the MKI of this amp as a preamp to try out the tube sound.
(Edited)
wsturgiss
0
Oct 20, 2020
Yeah I just noticed that, about the bluetooth. So this has a DAC built in as well. That does make a significant difference.
wsturgiss
0
Oct 20, 2020
Yeah, I was mixed up - talked to the company for whom I thought FX Audio was an in-house brand, and I had them mixed up with a different brand.
howardsbrows
2
Oct 19, 2020
Does this include an Aus power supply? - what do I need to power it.
InvisibleInk
51
Oct 19, 2020
I think I want one of these. Anybody have a recommendation where I can by tubes (e.g., "6J1, 6J4, 6AK5, 6K4")?
Frogmeat
414
Oct 20, 2020
Ebay, tons of them on there. But try it with the tubes that come with it first, they aren't the usual crappy Chinese 6J1 model that's tossed in most times.
InvisibleInk
51
Oct 20, 2020
Thanks!
VanHai
79
Oct 19, 2020
Drop charges $5.00 for shipping, so the actual price is $50.00 not $45.00.
Mitchh
3
Oct 19, 2020
Is picture #2 to scale with the power supply and RCA cable?
One_Eyed_Jackal
132
Oct 19, 2020
Then that must be a giant hand in picture #3!
SunZmSpark
4
Oct 20, 2020
The photos are horribly edited. Is it me or do the tubes look crooked? Looks like they were added to it in Photoshop.
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