SOLO/610 Classic Tube Preamplifier & DI Box

SOLO/610 Classic Tube Preamplifier & DI Box

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(34 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.

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



(34 reviews)

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.

C. Kelly

February 8, 2012

sounds bodacious. clean, big, natural. Thanks!

J. Truelove

June 29, 2011

So many positive things have already been said about the Solo 610 that giving another description of the sound and features of the unit would just be adding to the accolades. So, instead I thought I would describe my situation and how I use the 610 in my personal setup and why it is so valuable in what I do.

I am a singer/songwriter and a bass player. I have a home studio with a PC that captures audio through a PCI sound card. Even though my home studio is a basic setup, I never want to compromise on the quality of my recordings just for the sake of getting my ideas down. Also, from time to time I will help out other players that are looking to cut a simple demo but still want a high quality recording. The Solo 610 really makes this possible by being easy to use and delivering clean sound with a variety of characteristics.

I have used the 610 as a mic preamp for vocals, various acoustic and electric instruments and as DI for electric bass. Whether I drive the input section for a warmer tone or the output for a sharper attack, in either mode the results are clear and pristine Of course, it imparts plenty of color to the recording which is, to my ears, reminiscent analog tape but it never becomes dull. I have found this is especially important as additional tracks are recorded. When I multi-track using the 610 everything blends together nicely as if I had my own console.

The 610 produces great results with all of the condenser microphones I have used including a tube mic with an external power supply and a FET that requires the onboard phantom power. I also get a nice sound using a dynamic mic when recording electric guitar through a very loud amp.

This is also a wonderfully transportable box that has accompanied me to other recording sessions. I have recorded bass for other folks who own personal studios that are setup to record full bands using multi-track firewire interfaces. Those are all great and cost effective ways to get the job done but I find using the 610 as a DI and going through the line-in and bypassing the onboard preamp of those units brings another dimension to the sound.

I could see the need for few more EQ points below 100hz on the high pass filter but that is still very useful for vocals and acoustic instruments I have recorded.

The Solo 610 is perfect for anyone looking for an affordable, simple but professional grade preamp that is versatile and has a lot of character.

S. Galutia

June 28, 2011

I love this little tank, it makes me feel warm and fuzzy...

R. Mc

June 18, 2011


R. Garrido

June 17, 2011

It is a very versatile pre you can get a very clear signal to large saturation signal without destroying the sound, but best of all, it sounds great! It all sounds the closest.

A. Charras

June 17, 2011

Warm and Dark.
Perfect for me !
I use the 610 for ALL , (exept for kik drums o snare drums)
In vocals bass and guitars is perfect.

J. Peralta

June 17, 2011

Despues de mucho buscar, por fin he encontrado en este previo el color deseado para mis tomas, sin dudas el mejor previo que ha pasado por mi estudio.

N. Akrabi

June 17, 2011

An amazing sounding tube based preamp.
considering the price you pay for it ,it's practically "free"...

I am using it for the last 3 years for bass GTR ,elec GTR,mail and female vox.
allot of character, well build .

no doubt that the solo 610 is a most in all professional and home project studios!

thank you
universal audio!


M. Scarafoni

June 16, 2011

Un excelente y sencillo preamplificador a válvula. Versátil.

An excellent and simple preamp valve. Versatile.

T. Zimmerman

June 16, 2011

This is an amazing preamp.
Like most great equipment it is deceptively simple.
A few switches, jacks and two big knobs.
If you only give the unit a causal try you will be
misled. It is not as loud as other units, but if you
take the time to carefully dial in the right ratio of
input to gain, you will be shocked at how versatile
and expressive this unit is. Unlike many preamps,
which basically just sound like the same signal
simply made louder or softer, the Solo 610 takes
on subtle shades of character, suited quite well
to vocals and bass. It is an outstanding preamp,
and it is a classic for good reason.

S. Oxford

June 16, 2011

What can I can that hasn't already been said about this piece? It's a workhorse in my little home studio.. Along with the Solo 610 I have a Gordon Instruments, a pair of Great Rivers, a Tab Funkenwerks V78m and a Geoff Daking pre/eq as my "front end" choices and the 610 is on par with all the others and that's some heady company, in my mind.. Bravo UA!

J. Teeters

January 25, 2011

I love this pre/di. It's a good all rounder. I think it's great for processing in the digital domain to get some warmth and color.

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