Manley Labs VOXBOX Combo Tube Channel Strip

SKU: MLMVBX MFR: MVBX
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Key Features

  • Achieve pristine sound with the VOXBOX's low-noise tube microphone preamplifier stage.
  • Sculpt your tone using the versatile EQ options, perfect for vocals and instruments.
  • Experience warm, classic sound with the built-in tube channel strip for rich recordings.
  • Utilize the de-esser and limiter to control sibilance and dynamics in vocal tracks.
  • Enjoy flexible connectivity with XLR and 1/4" inputs/outputs for studio integration.
  • Get precise control over gain with dedicated mic and line input preamp adjustments.
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Special Order?Estimated to Ship: 08/18/2025
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Manley Labs VOXBOX Specifications

  • Input

    1x Mic Input: Balanced transformer coupled XLR at 2000Ohms
    1x Line Input: Balanced transformer coupled XLR at 3000Ohms
    1x Line Input: Balanced transformer coupled 1/4" TRS at 3000Ohms
    1x Insert Input (EQ Section): Balanced transformer coupled XLR at 3000Ohms
    1x Insert Input (EQ Section): Balanced transformer coupled 1/4" TRS at 3000Ohms
    1x Direct Input: Unbalanced 1/4" at 100,000Ohms

  • Output

    1x Preamp Output: Balanced transformer coupled XLR at 50Ohms
    1x EQ Output: Balanced transformer coupled XLR at 50Ohms
    1x Preamp Output: Unbalanced transformer-less 1/4" TRS (+4dB)
    1x EQ Output: Unbalanced transformer-less 1/4" TRS (+4dB)
    1x De-Esser stereo link via RCA jack
    1x Compressor stereo link via RCA jack

  • Compressor

    Ratio: 3:1
    Maximum Gain Reduction: 16dB
    Attack Time: 4 to 70ms
    Release Time: .3, .5, 1, 2, 5 Sec

  • EQ Section

    Low Peak: 20, 35, 50, 70, 100, 150, 200, 300, 500, 700, 1000 Hz +10dB
    Mid Dip: 200, 300, 500, 700, 1k, 1.5k, 2k, 3k, 4k, 5k, 7k Hz -10dB
    High Peak: 1k, 2k, 3k, 4k, 5k, 6.4k, 8k, 10k, 12k, 16k, 20k Hz +10dB

  • De-Esser & Limiter

    Ratio: 10:1
    Maximum Gain Reduction: 32dB
    Attack Time: 2ms
    Release Time: 500ms
    De-Ess Notch Frequencies: 3, 6,9,12kHz, none (Limit)

  • Tubes

    Mic Preamp: 1x 12AX7LPS and 1x 6414
    EQ Section: 1x 5751 and 1x 6414

  • Headroom (Referenced to +4dBv)

    27dB

  • Frequency Response (Audio)

    Preamp: 20Hz to 60kHz +/-1dB
    EQ: 10Hz to 100kHz +/-1dB
    Both:20Hz to 60kHz +/-1dB

  • THD & Noise

    Mic Preamp THD & Noise (1kHz at +20dBm): 0.3%
    EQ THD & Noise (1kHz at +20dBm): 0.3%
    Both THD & Noise (1kHz at +20dBm): 0.35%

  • Noise Floor

    Mic Preamp Noise Floor (Settings to Minimum): -86dB
    EQ Noise Floor (Settings to Minimum): -89dB
    Both (Settings to Minimum): -84dB

  • Signal to Noise Ratio

    Mic Preamp: 113dB typical
    EQ: 116dB typical
    Both: 110dB typical

  • Maximum Input Level

    Mic: +20dB
    Line: +40dB

  • Maximum Output (1.5% THD)

    Unbalanced: 20-20k: +31dBv
    Balanced: 1kHz: +31dBv

  • Gain

    Microphone Input: 60dB
    Line Input: 20dB
    Insert Input: 20dB

  • Power Supply

    200mA at 115VAC

  • Power Consumption

    24W

  • Mains Voltage Frequency

    60Hz

  • Fuse

    Mains 120VAC= 1 Amp Slo-Blo
    Mains 240VAC= 1/2 Amp Slo-Blo

  • Rackmountable

    3U

  • Dimensions (W x H x D)

    19.0 x 5.25 x 10.0" / 48.26 x 13.34 x 25.40cm

  • Weight

    14.0lbs / 6.35kg

  • UPC Code

    890833000175

About Manley Labs VOXBOX

The VOXBOX combines the legendary Manley Mono Mic Preamp, the ELOP reborn as a lower ratio compressor, the MID EQ blown out as a full range PEAK-DIP-PEAK EQ and a DeEsser with a second ELOP limiter at the end. Using the Direct Input, bass players often wonder why it wasn't named the BASSBOX.

• MANLEY transformers w/nickel laminations in mu-metal cases
• 2 kOhm MIC INPUT Z w/High current 48V Phantom power built-in
• Hi-Z (100K) Direct Instrument Input
• LINE & INSERT INPUTS (balanced XLR & 1/4")
• PREAMP & EQ outputs LO-Z (50 Ohms)
• Transformer balanced XLR outputs
• Transformerless unbalanced 1/4"outputs
• Stereo Link for Compressor & De-esser/Limiter
• Side Chain Monitor for De-Esser
• Large Illuminated Sifam Meter with Five readout modes

It Looks Awesome, But What Is It
Primarily, it is a voice processor which in itself is not a novel idea, but the time had come to pull out all the stops and make a truly professional high-end statement. One that covered the needs of the project songwriters and big-time major studios alike. One whose all-tube signal path could bring every instrument and overdub to life. One that, plain and simple, sounded unquestionably better than the rest, provided flexibility, simplicity and well thought-out ergonomics. Full of features, timeless style, robust build quality and that world-famous "Manley Sound", They present to you the MANLEY VOXBOX.

That's Nice. What's It Good For
While they were designing the VOXBOX they couldn't help but notice how well it works on other instruments besides voice. There are some great settings for drums, bass, guitar and keys and the two separate sections can be used together or independently. Stereo using two VOXBOXes You know we couldn't resist planning for that as well. There are Stereo Links for both the compressor and the De-Ess/Limiter sections, special compression settings and super-sweet EQ frequencies for your mix or pre-mastering. So don't just use it for voice. The name "VOXBOX" represents only the beginning...

Microphone Preamplifier Section:
The preamplifier is a clone of a highly regarded and popular mic pre: the Manley Mono Microphone Preamplifier! The mic input transformer is their own design wound in-house at the Manley Labs factory. High current 48V Phantom power is switchable from the front panel. A simple and effective passive BASS CUT switch kills rumble and reduces popping. The INPUT ATTENUATOR is a variable pad control situated before the first tube stage allowing the preamplifier to accommodate +4 line level signals via the balanced LINE INPUT and instruments via the front panel 1/4" DIRECT INPUT. These inputs are selected in the middle position of the dual-function phase invert switch. They provide both transformer balanced XLR output as well as a transformerless "audiophile" 1/4" phone jack output.

The Gain switch is actually a clever variable feedback control that changes not only the gain but the slew rate and flavor of the circuit. With it you can choose how laid back and mellow or how up-front and aggressive you want it to get. Headroom is a strong point in this circuit, +31dBu capable. This is 5 to 10 dB better than almost all other pro gear. The music passes through only their super-clean pure Class A vacuum tube circuitry. There are obvious advantages to their purist approach and foremost is the un-electronic final sound that carries emotion into the digital realm.

Compressor Section: This cool compressor design takes opto-isolator approach of the Manley ELOP Limiter to the max. They adjusted the Ratio down to 3:1 to turn ELOP into a compressor and added ATTACK and RELEASE controls for more versatility. What is clever is how the signal is compressed before it hits the tubes with no detrimental effect on distortion or frequency response. This way, it can prevent mic-pre clipping and eliminate whole stages of electronics. This cuts the typical path of mic to tape in half! They also pioneered new thinking in the sidechain by using up to four different time constants simultaneously and controlling them with familiar simple attack, release and threshold controls. we call the approach "Parametric Compression".

Manley developed optimum settings or presets based their favorite Vactrols that we use in our own fast ELOP Limiter, the quick LA-2A's T-4 module, the slower LA-3A and then created more complex special settings. This extended range and method of timing delivers fresh sounds from powerhouse punching drums to super-solid bass yet can also emulate the way good engineers delicately ride a fader while recording. It is transparent and liquid-smooth on vocals, easy to use and accurate. Also rare for an opto-based dynamic processor, this compressor works great on mixes. Of course, you'll be needing two VOXBOXes linked in stereo...

EQ Section:
Lots of folks requested that they include the Pultec Mid Frequency Equalizer in the VOXBOX, but they wanted MORE.... Now they have extended it to 33 frequencies in 3 bands with 6 new frequencies from 20 Hz to 150 Hz and 6 more in the highs from 6.4 KHz to 20 KHz. Ever notice that only EQs with real inductors have the bottom end magic or that only Class A circuitry can keep the top end sweet This is for you. The EQ INPUT switch patches in the Line Input, Preamp Output or the INSERT return. This switch serves double-duty acting as a bypass switch for the preamp and/or external processors or for processing two different tracks.

De-Esser & Limiter Section:
Designed by folks with admittedly large gaps between their two front teeth, (Hutch and EveAnna) the VOXBOX combo also includes a de-esser & peak limiter based on original ELOP Limiter design but with an added passive LC network to handle the de-essing four carefully chosen notch frequencies from 3KHz to 12KHz. (That 3KHz setting really tames those annoying frequencies!) The fifth position gives you a limiter which totally mimics the famous LA-2A. This means you can both compress pre-EQ then limit here post-EQ. Another cool feature is the ability to insert this de-esser silently and smoothly as the music plays, using it as needed.

The Meter
The METER is a full size illuminated Sifam VU meter. A five-position switch shows three audio levels: the line input, the preamp output and the final output. It also shows compressor gain reduction and the de-esser/limiter action. Other clever innovations incorporated into the VOXBOX combo include warm-up muting circuitry, extensive magnetic field containment, 'smart -grounding' and silent switching. The sum-total is more than the separate parts: consider the reduced patching, the short path to tape and you having this much immediate control. As engineers, we choose what we use not based entirely on features and functions - there is a sound, a texture we reach for and the VOXBOX combo puts the 'Manley Sound' together with 'Your Sound'.

Product Documents

User Manual

Key Features

  • Achieve pristine sound with the VOXBOX's low-noise tube microphone preamplifier stage.
  • Sculpt your tone using the versatile EQ options, perfect for vocals and instruments.
  • Experience warm, classic sound with the built-in tube channel strip for rich recordings.
  • Utilize the de-esser and limiter to control sibilance and dynamics in vocal tracks.
  • Enjoy flexible connectivity with XLR and 1/4" inputs/outputs for studio integration.
  • Get precise control over gain with dedicated mic and line input preamp adjustments.

What's in the box:

  • Manley Labs VOXBOX Combo Tube Channel Strip
  • Standard IEC Power Cable
  • Manley Labs 90 Day Limited Warranty