ART TubeOpto 8

8-channel Tube Microphone Preamplifier with 24-bit ADAT I/O, 70dB of Gain, and 1/4" Outputs
ART TubeOpto 8 image 1
ART TubeOpto 8 image 1
$449.00
Sweetwater Savings: $110.00 MSRP: $559.00

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ART TubeOpto 8
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Get Eight Channels of That "Tube Sound!"

Ever wish you could add more of that "tube sound" to your recordings, without breaking the budget or filling up your rack with a clutter of gear? Now you can, with ART's Tubeopto 8! This flexible 8-channel tube preamp features ADAT input and output connectors, so you can easily expand the I/O capabilities of your existing interface rig - it's the perfect way to prepare for full-band recording, with a real-deal tube pre! Each channel has a Class A vacuum tube mic preamp, 70dB of gain, and balanced 1/4" phone or XLR inputs for flexibility. We'll say it again: you just can't beat the TubeOpto 8's value!

Beyond offering a full complement of eight tube preamp channels, the TubeOpto 8 is ready to integrate with all of your existing studio gear. You can pipe in the eight channels to your favorite ADAT-equipped audio interface via lightpipe. You can also use the word clock connectors onboard to get all your digital gear in sync with each other. Beyond all that, the TubeOpto 8 has you in mind. Ever wish you could plug in an acoustic and lay down a quick song sketch? Now you don't have to hunt down an open channel or crawl around to the back of your rack. Just plug righ tinto one of the two convenient frot-panel hi-Z instrument inputs and you've got the benefit of a tube warming up your sound.

The ART TubeOpto 8 was made to get the most possible value out of your budget. With an astoundingly affordable per-preamp channel... and keep in mind, these are tube preamps... you won't believe the sonic (and channel count!) upgrade you get when you add the ART TubeOpto 8 to your studio lineup.
ART Tubeopto 8 8-channel Tube Microphone Preamp with ADAT Features:

  • 8-channel Tube Microphone Preaamp with ADAT and 1/4" output
  • Eight fully featured Class-A tube mic preamps
  • Eight channels of ADAT digital 24-bit audio I/O at 44.1 or 48kHz
  • Input gain and output level controls on every channel
  • Input pad, phase flip and low frequency roll off switches on every channel
  • Two additional front-mounted hi-Z instrument line inputs
  • Eight 1/4" TRS Balanced Outputs
Give yourself eight channels of awesome tube preamp sound with ART's amazingly affordable TubeOpto 8!

Additional Media

Studio Preamp Buying Guide
TubeOpto 8 User Manual

Tech Specs

Preamp Type Tube
Number of Channels 8
Frequency Response 12Hz-20kHz
Phantom Power Yes
Analog Inputs 2 x 1/4" (Hi-Z), 8 x Combo (XLR/TRS, Mic/Line)
Analog Outputs 8 x 1/4"
Digital Inputs 1 x ADAT (Optical)
Digital Outputs 1 x ADAT (Optical)
Clock I/O 2 x Word Clock
Rack Spaces 1U
Height 1.75"
Depth 14.4"
Width 19"
Weight 13.2 lbs.
Manufacturer Part Number TubeOpto8

Customer Reviews

4.5/5
Based on 5 reviews
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5/5

TubeOpto 8, an excellent addition to the O1v

Great sound quality, ease of use, light-pipe connectivity, front controls and metering and the clients like the fact it has tubes for warmth. In addition to opening up channels 17-24 on the input side, I now have 8 outs I can send to 4 stereo or 8 mono headphones or wedges. The O1v is a great tool, the TubeOpto 8 expands the users options. When I get the cash, I plan to add another, expanding my live rig to 32 channels. After extensive research, I cannot imagine a better quality sound, ease of use and more bang for your buck than the TubeOpto/O1v combination.
Music background: Live Sound Engineer
4.5/5

Look no further for an ADAT expansion

So I debated for a very long time about which route to go to add 8 channels to my rig to pair with my Liquid Saffire 56. The Octopre and the dynamic version were on my watch list. After listening to tons of examples and doing my research I got this piece and I'm not looking back. Outside of the 2 liquid pres this sounds better then my Saffire 56. Knobs are kinda meh. But really who cares. The sound is the most important thing and this unit delivers. I love the midrange and the way it reacts to transients. Acoustic guitars, vocals, and drums are gonna sound great in this thing. Pretty much everything really. And clients love the word "tube". It adds a new air of legitimacy to my relatively small studio and the sounds I can get. I will look to upgrade the tubes in the future but for now it's a solid preamp. Get one and you won't be sad.
Music background: Touring musician, producer, engineer
4.5/5

Great Sound, only these knobs....

Great piece of equipment, sounds really nice, when tubes are not pushed hard. Needs a bit fiddling in and out to get desired sound and levels. I use it with Focusrite Saffire 56, i wanted to get octopre but went with art, no regrets at all. Sound quality very close (if not better) to Saffire 56. All that great BUT... these knobs, horrible choice for knobs, they feel cheap, they dont move smooth, but simple solution.. ebay and order yourself a set of new knobs. SSL style knobs work perfectly, way better than stock ones. No friction at all. RUNS HOT keep it in mind. Soon i'll try changing tubes in mine.
Music background: Engineer/Producer
4/5

Nice Features, Runs Hotter Than Expected

I definitely like all the features included on the front panel, like the mini-meters, PAD switches, and high pass filters. I do find myself wishing for click stops on the knobs (but then again, what has that other than multi-thousand-dollar units that say "Mastering" on the marketing literature), and I was also surprised by how much thermal radiation the tubes emit. (To be fair, I'm not really a follower of tube-based equipment, so I have no reference point.)
Music background: Live Sound Engineer, Recording Engineer
4/5

Great for Drum Tracking

Bought one of the first ones. Hooked up the ADAT out to a RME RayDAT and tracked some rock drums on Nuendo. Result: punchy, low noise, handles transients well, slight bit of upper harmonic warmth (tube saturation). Then I took the ADAT out and plugged into the ADAT in and used the analog outs into my hot-rodded Soundcraft Ghost (Burr-Brown op amps, low ESR caps) and then to a Lynx Aurora and Nuendo. Result: more analog sounding, better midrange, even better soft clipping in the upper harmonics. Bottom line--with the right digital interface, a good alternative to an op-amp based preamp box. The tubes are Chinese 12AX7s (total of 4 stereo), but definitely not bottom of the barrel. Some amount of hand-picking obviously goes into the tube selection at assembly time.
Music background: Recording Engineer
See also: ART, ART Preamps