SOLO/610 Classic Tube Preamplifier & DI Box

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(32 reviews)
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The all-tube 610 Console Mic Preamp sound in a rugged, “go anywhere” design.

The SOLO/610 delivers the classic Putnam 610 tube console sound in a portable, highly versatile mic preamp design. It provides the silky, vintage warmth of the original console’s mic amp design, and will flatter and enhance any microphone or instrument with its iconic tones.

Thanks to its convenient form factor, the SOLO/610 can be conveniently used in the control room or the recording room, on stage, or on a desktop. Functionally lean but sonically mean, the SOLO/610 maintains the character of the 610 console — at a price every serious project studio can afford.

Now You Can:

Record through the classic tube circuit of the Putnam 610 console mic preamp and DI

Add tube girth and detail to any mic

Sculpt signals with Gain, Level, and Impedance controls for maximum tonal variety

Craft your sounds with classic UA tube circuits, hand-built in the USA

Vintage Tones, Modern Workflow

Vintage Tones, Modern Workflow

The SOLO/610 offers Mic and DI inputs, and Gain and Level controls for myriad clean or colored sounds. Unlike its predecessors, the SOLO/610 has continuous Gain control with even greater range, allowing for precise gain structuring. The SOLO/610 has all of the essential features of a professional mic pre, including 48v Phantom Power, Lo-Cut filtering, Phase Reverse, and flexible dual impedance selection for both Mic and DI inputs. The SOLO/610 also includes essential DI features like Thru use in conjunction with an amplifier, plus Ground Lift and a versatile Mic/Line level output switch.

Customer Reviews

Key Features

Classic Putnam 610 console mic preamplifier and DI
Legendary all-tube sound, at a project studio price
Gain, Level, and Impedance selection for maximum tonal variety
Portable design for studio, desktop or stage
Rugged construction-steel chassis
DI features include Thru and Mic/Line level output
Hand-built in USA; backed by 1-year limited warranty


Input Impedance
Mic Input - Selectable 450 ohms (Lo-Z) or 1.6 kilohms (Hi-Z)
DI Input - Selectable 2.2 megohms (Lo-Z) or 50 kilohms (Hi-Z)

Output Load Impedance
20 Hz to 20 kHz +/- 1 dB

Maximum Gain
61 dB

Tube Complement
(1) 12AX7, (1) 12AT7

Maximum Mic Input Level
-12 dBu, 1.0% THD+N Ratio

Maximum Instrument Input Level
+4 dBu, 1.0% THD+N Ratio

Maximum Gain Mic Input
55 dB (1.6K ohm input), 60 dB (450 ohm input)

Mic/Instrument In Frequency Response
20 Hz to 20 kHz, +/- 0.1 dB

Maximum Gain Instrument Input
37 dB

L: 14"
W: 5 3/4"
H: 5"

9 lbs.

Customer Reviews



(32 reviews)

P. Catella

June 17, 2011

This is an incredible preamp!
Without throwing too much character into your recordings (some valve flavor, but not overwhelming), it is detailed and creamy - whilst still retaining a fair amount of bite and good transient response.

While they are not know for having much headroom, I'd say that for dynamic and condenser microphones (along with many newer ribbons), they offer more than enough gain - along with value and tone.
It's a classic UA piece; and it's easy to add some extra harmonic content to your sound, although they are quite hard to fully drive. They keep their clarity and detail even in higher gain settings, and you never feel like you're losing control of the sound. Ever.

I found them to be so good.... I bought two. Try putting a Neumann U67 or a Brauner Phantera through them, you'll know what I'm talking about.

Now, a bit of constructive criticism: metering could be better; the one and only light that gives you an indication of gain is unusable, in any situation. The case, although very sturdy and thought-out, is bulky and somewhat unattractive. And a few more dB's of gain would make me feel more at ease overall.

But if you're like me, and only really care about the sound, then I can't fault them in any way.

UAD User

April 7, 2017

just so nice

tubey dooby i love this pre. everything sounds so nice and thick and real.

A. Tebeleff

February 17, 2017

Great for bass

Killer bass tone

P. Freitag

January 28, 2017

Groovy Tube

Awesome unit! If it were a chick... I'd marry it!

w. triyawong

November 26, 2016


มันดีมาก ........

S. KreisDrei

October 28, 2016

jsut great

i like it very much, giving me the warm sound for my anlogue maschines i need.

A. Dees

October 18, 2016

Just the sound I was missing!

Tried a few other mic preamps but none gave me the warmth and character that I get from my UA 610 solo! Hands down the best in its class!!!

L. Fernandes

December 27, 2015


The Solo 610 is an awesome preamp/DI, which warms up your tracks. I've been using it intensively for 6 years now and can't praise it more..

It also saturates pleasantly when needed.

Extremely recommended.

E. Chong

January 23, 2015


One of the best sounding DI boxes out there. LOVE it especially on bass and mic'ing harsh sounding brass instruments.

J. Cheek

November 27, 2014

Classic piece of gear

This was the first preamp I ever bought when starting out and I've never looked back. Used it for everything over the years. In particular now I love just plugging a bass straight in and knowing that I'm going to get a great sound straight away!

Thank you!!

D. Saltzman

August 7, 2013

Killer Preamp for any source!

I have had the pleasure of working extensively with the 2-610 units and I knew I had to pick this guy up. It is my go-to DI for bass/vocals and sounds incredible with almost any source. I love the transient clarity on bass and vocals, and I have also had a lot of success using it for sax, trumpet, guitar amps, bass amps, kick drums and snares. While it does not have the EQ section that the 2-610 has, the variable input and output stages really give you a lot of tonal variety.
I have no complaints with the unit and I am extremely excited to use it with my new Apollo Quad! I love all Universal Audio products and their customer service is also incredible. Definitely pick this guy up if you are looking for a preamp that will give you some TONE

S. Bahmani

April 28, 2013

love 610

this preamp is really cool...i love it ... Thank you UA for your helping in World of music :)

C. Tuncer

April 13, 2013

SOLO/610 Classic Tube Preamplifier & DI Box

SOLO/610 Classic Tube Preamplifier & DI Box perfect preamp

A. Bouchard

January 22, 2013


I have had a lot of different preamps. This one is the best sounding, cleanest and most useful in my experience. It has a sonic signature. The tube gives a creaminess at low levels and slightly grainy at max levels but it always sounds good no matter what you do.It is the best piece of gear I bought last year, hands down.

L. Hughes

December 31, 2012

Great preamp

This preamp provides a great interface for almost any mic. I particularly like it in a vocal chain with a U87 or TLM49. Works as a DI, but for some reason I get a hum when passing through to an amp. Some are worse than others. Noisy guitar amps are often even noisier using the 610 in line. Removing the earth from the mains leads sometimes helps and the ground lift switch makes no difference. Small trade off for an otherwise fantastic sounding unit. The built quality is also superb.

C. Presnell

August 31, 2012

Love it!!!

Had a chance to try it next to an API 512c for an A/B comparison. I loved what it did to the sound. Very versatile with the separate gain and level knobs. The API only has a level knob which is very small. The Solo 610 has a great pair of knobs!!!

I've also used it in my home studio where a few issues with noise occurred. A/C hum out the thru made it unusable as a DI when passing through to an amp. It also picked hum with my other guitars when going directly into my DAW.

All these problems disappeared when I brought it to work at a real studio. No hum issues under any circumstance when used at the studio. None while using it as a DI, none while using it as a pass through to the guitar amp, and none when a mic was hooked up.

Great pre-amp

M. Sikkerboel

May 11, 2012

the 610 is my favorite preamp. i use it with a variety of microphones and it never lets me down. the brauner phantom and the neumann tlm-103 are my current faves.

B. Garth

April 26, 2012

The SOLO/610 Classic Tube Preamplifier & DI box is quite possibly my favorite piece of gear in the studio. Unlike my rack, which is far from being in a comfortable listening position, the 610 sits right next to me, dead center of the mix. It provides a surprisingly wide variety of tone features; every turn of the 'Gain' control adds sweet, buttery harmonics to any signal. The DI is an amazing solution to sterile guitar or bass tracks. The SOLO/610 has a very classic sound, which is usually what my clients and myself are looking for. This is quite possibly the best valve vocal preamp on the market and I highly recommend having one of these handy to every engineer and recording artist out there.

D. Leon

February 23, 2012

The solo 610 is a Great Pre, certainly adds a nice bottom tube sound to almost anything i run through it. A great must for decent sounding vocals. Has a extremely low noise ratio which please's me. :) dclstudioz@gmail.ocm facebook: Donovan da don Leon Twitter: @dclstudioz

S. Bjernemose

February 13, 2012

I can only say, that my 610 Solo realy give a warm smouth sound to the vocal. It´s a nice device.

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