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Customer Reviews 145 Reviews

4.74 out of 5 stars

by G. McKinney (4/18/2015):

I have been a huge fan of 610-B MkII so when I saw that this plugs came with my Apollo… Read more

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UA 610 Tube Preamp Collection.
Authentic tube mic preamp modeling – featuring Unison™ technology for Apollo interfaces.

When Universal Audio founder Bill Putnam Sr. introduced the 610 Modular Amplifier preamp in the early '60s, it was a milestone in audio recording history. The 610 became famous among record producers for its startling harmonic detail, and rich clipping characteristics, and its ability to overdrive in a warm, ultra-musical fashion.

The original 610-A preamp was integral to countless legendary recordings — from the Beach Boys’ Pet Sounds and Johnny Cash’s At Folsom Prison. Its modern variant, the 610-B, helped to create new classics by Adele and Cold War Kids. Today, you can add the same tube presence, warmth, and body to vocals, guitars, bass and more with the UA 610 Tube Preamp & EQ Plug-In Collection for UAD-2 and Apollo interfaces.

Now You Can:
  • Give your tracks startling three-dimensional tube warmth, presence, and body
  • Record “through” the 610-A or 610-B tube preamp models in real time using Apollo Twin, Apollo DUO or Apollo QUAD
  • Use the 610-A plug-in to get the exclusive sound of the Wally Heider "Green Board," used to record Neil Young, Ray Charles, Elvis Presley and Jimi Hendrix
  • Add Unison™ technology to your Apollo, controlling physical mic preamp gain staging and impedance with Unison-enabled UAD plug-ins
  • Mix and saturate signals with any UAD-2 hardware for an iconic tube glow

The First Genuine 610 Tube
Preamp Emulation
More than three years in the making, the UA 610 Collection represents the first comprehensive modeling of the legendary 610-A tube preamp and its modern variant, the 610-B — including their tube and transformer components and all of the unique distortion characteristics of the originals.
The 610-A is modeled on a channel from the storied Wally Heider "Green Board," used to record Neil Young, Ray Charles, Elvis Presley and Jimi Hendrix, and offers simple
10 kHz high-shelf and 100 Hz low-shelf EQ. The modern 610-B offers selectable input impedance, adjustable high- and low-shelf EQ, and expanded gain range. 

Unison Technology for Apollo Interfaces

Harnessing UA’s groundbreaking Unison technology, the UA 610 Preamp & EQ Collection blurs the lines between analog and digital, giving you all of the 610’s important impedance, gain stage “sweet spots,” and circuit behaviors that have made it the classic tube mic preamp.

The secret is Unison’s bi-directional control and communication from the 610 plug-ins to the digitally controlled mic preamps in the Apollo Twin, Apollo DUO and Apollo QUAD.

Just like their hardware relatives, both the 610-A and 610-B plug-ins allow signal processing at Line and Mic levels, with both 500 Ω and 2.0 k Ω impedance setting options available in the 610-B. Combined with Apollo's physical preamp gain, this provides a tonal range from clean to clipped — with tons of broad, musical sweet spots in-between.

Add Tube Color to any Source
UAD-2 and Apollo 16 owners can use the UA 610 Collection for mixing, adding color and saturation to any source, without going outside the box. Inject your tracks with the legendary warm, natural compression the 610 is famous for, allowing you to place instruments perfectly in the mix while giving them a rich, three-dimensional tube character.

UA 610 Tube Preamp Collection 
Key Features
  • Universal Audio modeled UA 610 Tube Preamplifier and EQ
  • One of the most popular preamps ever made — designed by M.T. “Bill” Putnam
  • One purchase provides both modern 610-B and vintage 610-A based on historical Wally Heider desk
  • Models UA 610 electronic path including tube amplifiers and transformers, with circuit nonlinearities
  • Realtime UAD Processing and exclusive Unison Mic Preamp Technology features with Apollo audio interfaces
  • Mic, Line and Hi-Z inputs with Unison Mic Preamp Technology
  • Physical analog 500 Ω or 2K Ω switchable input impedance of 610-B fixed 600 Ω impedance for 610-A with Unison Mic Preamp Technology
  • Tactile control of Gain staging and common preamp parameters with Unison Mic Preamp Technology
  • Requires a UAD-2 DSP Accelerator or Apollo Interface available from authorized dealers worldwide
  • Input Select Mic/Line
  • Input Pad: Off/-15 dB
  • Input Gain: Low/Hi
  • Polarity: In (0˚) / Out (180˚)
  • 10 kHz High Shelf EQ Gain: -6, 0, +3, +6 dB
  • 100 Hz Low Shelf EQ Gain: -6, 0, +6 dB
  • Level: ∞ to 0 dB
  • Output: ∞ to 12 dB
  • Power Off/On
Additional Unison Preamp and Console Parameters
  • Low Cut Filter: 75 Hz, 12 dB per octave
  • +48V Phantom Power
  • Stereo Linking
  • Input Select: Mic 500 Ω, 2K Ω, Line
  • Input Pad: Off/-15 dB (disabled for Line/Hi-Z)
  • Input Gain: -10, -5, 0, +5, +10 dB
  • Polarity: In (0˚) / Out (180˚)
  • Low Shelf Frequency: 70, 100, 200 Hz
  • Low Shelf EQ Gain: -9, -6, -4.5, -3, -1.5, 0, +1.5, +3, +6, +9 dB
  • High Shelf Frequency: 4.5, 7, 10 kHz
  • High Shelf EQ Gain: -9, -6, -4.5, -3, -1.5, 0, +1.5, +3, +6, +9 dB
  • Level: 0 to 10
  • Output: ∞ to 12 dB
  • Power: Off/On
Additional Unison Preamp and Console Parameters
  • Low Cut Filter: 75 Hz, 12 dB per octave
  • +48V Phantom Power
  • Stereo Linking

UA 610 Tube Preamp Collection

Add Complexity and Warmth to Lead Vocals

Use the 610-B to bring out a lead vocal’s lush overtones and harmonics.

You can also harness the 610-B’s Impedance selector to sculpt the character of the vocal.

Or use the 610-B’s Level control to add tube grit with a subtle touch of grainy goodness.

Enhance Acoustic Guitar Tracks

Expertly dial-in an acoustic guitar track with the 610-B’s tube-driven EQ to place the instrument perfectly in the mix.

The Impedance selector affords you even more musical possibilities, as it subtly alters the upper midrange and treble response.

Add Grit and Texture to Overheads

The 610-A yields musical crunch and detail to any signal you run through it.

Better Background Vocals

The UA 610 Tube Preamp & EQ Collection’s ability to smooth, shape, and sculpt any source will impart your music with a polished, multi-dimensional timbre, chock full of sonic intricacies and texture.

Smooth Out Electric Bass

Use the 610-A to round out bass frequencies and adding tube tone.


UA 610 Tube Preamp Collection 
Basics and FAQ
What is the UA 610 Preamp & EQ Plug-In Collection?

The UA 610 Preamp & EQ Collection is part of Universal Audio’s groundbreaking entry into microphone preamplifier and channel strip plug-in emulations with Unison™ mic preamp technology. Two emulations of the 610 are available with one purchase: A modern version based on Universal Audio’s current 610-B design, and a vintage version based on the original 610-A console (specifically, the extremely well-pedigreed Wally Heider “Green Board”). The 610 mic pre has an illustrious history associated with numerous landmark recordings of the past, and is widely used today in its modern incarnations. The 610 preamp emulations capture the entire circuit of the original and very colorful 610 tube preamplifier.

How do Unison mic preamp plug-ins work with Apollo’s built-in preamps?

Apollo’s mic preamplifiers are digitally controlled and offer high-resolution, ultra-transparent translation from microphone to converter. While fantastic sounding on their own, these preamps are also designed as an ideal starting point to add processing color through Unison-enabled mic preamp plug-ins. Specifically, Unison mic preamp plug-ins control the analog impedance and gain structure of the Apollo’s physical mic preamps — so hardware and software works in tandem to very convincingly emulate classic tube and solid state preamp designs.

How do I use the UA 610 Preamp & EQ Collection while recording with Apollo?

Simply insert the Unison mic preamp plug-in into the “PREAMP” insert in the Apollo Console software. This enables near-zero latency recording with Mic, Line or Hi-Z inputs through the target preamp model. In addition to physical gain and input impedance control of the Apollo’s hardware preamps, Unison allows tactile control of preamp parameters. See the "Unison" chapter in the Apollo Software Manual more information.

I own UAD-2 hardware and/or Apollo 16. Can I still use the UA 610 Preamp & EQ Collection?

Yes. Unison plug-ins can be used as standard UAD plug-ins inside your DAW of choice, or as Realtime UAD Processing inserts in the Apollo Console. The Unison plug-ins are great for adding color and tone with any UAD-2 hardware, but the hardware preamp interaction is only possible on Apollo DUO, Apollo QUAD, and Apollo Twin (i.e., devices that have physical mic preamps).

Variable analog impedance is not a feature found in Apollo’s original documentation. Why?

Apollo’s preamp operation does not feature input impedance switching, so no user access to the function was required. While the circuit has always been present in the unit, the feature is now operational to match the modeled input impedance of current and future preamp emulations, whether fixed or switchable (like the 610-B) providing physical, microphone to preamp resistive interaction.

How are the two 610 units you've modeled different from each other?

While the basic amplifier circuit is essentially unchanged between the original and modern 610, the 610-B (found in the 6176, LA-610, 2-610, etc.) was re-engineered for modern studio use with modern components and an expanded feature set. Because of this, there are differences between the two plug-ins in headroom, distortion characteristics, total gain, amplifier interactions, input impedance and other behaviors, which make both plug-ins complementary and essential. See the UAD Plug-Ins Manual for more information.

When I use the 610-A or 610-B in my DAW, they have Input settings for Mic/2.0K/500 ohm, but the plug-ins can’t be connected directly to a microphone. How do I use the 610 Collection as a mic pre in my DAW?

When not used as the front end of an Apollo interface, the 610 Collection’s main workflow is to color your signal at Line level in either your DAW or via Apollo Console’s non-integrated insert points, after the mic signal has been amplified. However, the Mic/2.0D/500 ohm settings are always available. The plug-ins can also can be used for heavy distortion of audio sources — it is the equivalent of putting line level signal into a mic level input. Use caution when switching from Line to Mic for this workflow, as a large jump in gain is expected!

Why does the 610 have so much distortion when I set the Input setting to
Mic/2.0K/500 ?

See the above FAQ. Like the hardware, both the 610-A and 610-B plug-ins easily allow the user to send Line level signal through the “virtual” Mic input, which allows creative use of distortion to color signals.

Which Universal Audio hardware 610 is the basis for the 610-B plug-in?

Minor differences among modern 610 incarnations exist such as the 6176, LA-610, LA-610 MkII; but the 610-B plug-in is based on the currently shipping version of the 2-610.




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  • Roshan 'Tosh' Wijetunge


    “It brings a certain warmth and richness out to the overall mix, which is a very lovely thing.”

    Niko Bolas

    (Neil Young, Warren Zevon, Melissa Etheridge)

    "It blows my mind that I'm looking at a screen and the UAD 610 plug-in sounds like the analog device I grew up with. There is nothing on these pieces of gear that I would need to go back to analog to get, that I couldn't have, just by using the plug-in."

    Jacknife Lee

    (R.E.M, The Cars, Snow Patrol)

    "Now that I have the Unison feature, I feel bad for my 610 hardware. It's so easy to use and it sounds the same. You turn one up and turn one down and it sounds good."

    Mark Linett

    (The Beach Boys, Brian Wilson, Los Lobos)

    "I've never heard anything that didn't sound amazing going through my 610 modules and consoles. The fact that the 610 is now be available as a UAD plug-in and on the Apollo is just stunning.”

    John Nowland

    (Neil Young, Merle Haggard, Maze)

    “The UAD 610 emulations retain the character, warmth, and naturalness of the hardware. You can use the plug-in confidently and know that you've got a good representation of what one of the modules would actually do for you."

  • David Ryan Harris

    (India Arie, Natasha Bedingfield, Guy Sebastian)

    “The Apollo preamps are super clean but I miss the control you have with the 610 upfront because it adds a personality that I really like. The Unison technology gives the Apollo yet another dimension of control and sound.”

    John Paterno

    (Robbie Williams, Badly Drawn Boy, Bonnie Raitt)

    "The UAD 610-B preamp plug-in gives me the size and feel of a great tube preamp/channel strip, in a design that allows me to use it anywhere, at any time, and at any point in the recording process.”

User Ratings

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Average Rating (145 Reviews)
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    by G. McKinney(Saturday 18 April, 2015)

    I have been a huge fan of 610-B MkII so when I saw that this plugs came with my Apollo purchase I was very excited. Read More

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    by J. Edwards(Thursday 16 April, 2015)

    These plugins are great and are a must have! I am impressed by the warmth and character they bring to recordings. The unison technology is amazing and I am excited to see what other preamps UA will model in the future! Read More

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    Cool Premic
    by T. Subpleng(Monday 13 April, 2015)

    I like unison tech. I could record lead vocal by ua 610B . I like , it sweet sound and warm . Read More

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    This is pure magic!
    by . (Friday 10 April, 2015)

    Using the 610 (a or b) is a no brainer. Whether tracking with it, or using it as the first insert on tracks while mixing, it literally is magic. I have been mixing lots of tracks from live recordings with tons of leakage to vocal mics. Somehow this plug in still adds air and clarity. Softens… Read More

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    Great plug
    by R. Ivanov(Thursday 9 April, 2015)

    Use this plugin with Apollo and very enjoyed how it works in insert! Read More



Apollo Software Manual (Thunderbolt)

Apollo Software Manual (FireWire)

UAD Plug-Ins Manual

UAD System Manual

UA Product Catalog