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Everything In Music - Since 1958
Everything In Music - Since 1958

Manley Voxbox Combo Mic Pre & Vocal Processor

Out of Stock
Original price $4,599.00 - Original price $4,599.00
Original price $4,599.00
$5,499.00 - $5,499.00
Current price $5,499.00
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

The Manley VOXBOX Preamp and Voice Processor Offers a Wide Array of Audio Processing with Amazing Audio Quality

It looks awesome, but what is it? Primarily, the Manley VOXBOX® is a voice processor- which in itself is not a novel idea, but the time had come to pull out all the stops and introduce 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. The VOXBOX® is full of features, timeless style, robust build quality, and that world-famous "Manley Sound".

That's nice. What's it good for? While still in the designing stages, Manley 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? Manley planned 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

The preamplifier is a clone of a highly regarded and popular mic pre: the Manley Mono Microphone Preamplifier! The mic input transformer is Manley's 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. The VOXBOX provides both a 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. See "Notes on Variable Feedback" for more info. Headroom is a strong point in this circuit, +31 dBu capable. This is 5 to 10 dB better than almost all other pro gear. The music passes through only the super-clean pure Class A vacuum tube circuitry. There are obvious advantages to this purist approach and foremost is the un-electronic final sound that carries emotion into the digital realm.


This cool compressor design takes our opto-isolator approach of the Manley ELOP® Limiter to the max. Manley adjusted the Ratio down to 3:1 to turn their 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! Manley 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. They call the approach "Parametric Compression". The optimum settings or presets are developed based on Manley's preferred Vactrols that are used in their 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.


The Pultec Mid Frequency Equalizer is included in the VOXBOX®, by popular demand, and it has been extended to span 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 and Limiter

Designed by folks with admittedly large gaps between their two front teeth, the VOXBOX® combo also includes a de-esser and peak limiter based on our 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 3 kHz 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. Manley engineers choose what they use not based entirely on features and functions - but rather they strive for a sound, a certain texture - and the VOXBOX® combo puts the 'Manley Sound' together with 'Your Sound'.

Manley Power

The MANLEY POWER® power supply is an innovative design developed specifically for Manley Labs, specifically for High Voltage vacuum tubes, and specifically for audio by the world expert team in this technology led by Bruno Putzeys. Proven reliable and sonically superior in the Manley CORE, this power supply provides 300 Volt DC rails to run the vacuum tubes, beefy 6 Volt lines to power them up, along with several other voltage rails for the phantom power and various solid-state control voltages. High Voltage = High Headroom, folks. You will not get near this sonic performance with in any 500-series design. This is Massive audio excellence which starts with this superior power supply. All lines are importantly regulated, low impedance, efficient, and super-quiet in this low radiating high frequency design. The universal mains input accepts any voltage or frequency from anywhere in the world making travel with the VOXBOX a breeze.


Mic Preamp Section

  • Maximum Output (1 kHz sine, 1.5% THD+N, BW 22 Hz - 22 kHz): +30 dBu
  • Headroom (referenced to +4 dBu): 26 dB
  • THD+N (1 kHz sine, +4 dBu): 0.008% (A-Weighted)
  • Frequency Response (+/- 1 dB): 10 Hz to 85 kHz
  • Noise Floor (settings to minimum): -83 dBu (A-Weighted)
  • Dynamic Range: 113 dB
  • Maximum Input Level: +20.4 dBu (mic), +22 dBu (line)
  • Input Impedance: MIC: 2000 Ohms; LINE: 4000 Ohms; INST: 100 kOhms
  • Maximum Gain: MIC: 60 dB; LINE: 23.2 dB; INST: 23.4 dB
  • Maximum Compression / Limiting: 16 dB (Comp); 32 dB (Limit)
  • Maximum Limiting with +4 dBu 1 kHz sine: 8 dB (Comp); 5 dB (Limit)
  • Attack Times: 4 mS - 70 mS (Comp); 2 mS (Limit)
  • Release Times: 0.3, 0.5, 1, 2, 5 Sec (Comp); 0.5 Sec (Limit)
  • Compress / Limit Ratios: 3:1 (Comp); 10:1 (Limit)

EQ Section

  • Maximum Output (1 kHz sine, 1.5% THD+N, BW 22 Hz - 22 kHz): +33 dBu
  • Headroom (referenced to +4 dBu): 29 dB
  • THD+N (1 kHz sine, +4 dBu): .009% (A-Weighted)
  • Frequency Response (+/- 1 dB): 10 Hz to 68 kHz
  • Noise Floor (settings to minimum): -78 dBu (A-Weighted)
  • Dynamic Range: 111 dB
  • Maximum Input Level: +22.8 dBu
  • Input Impedance: 3000 Ohms
  • Maximum Gain (INSERT): 0 dB / Unity (internal trim: -4.7 to +7.7 dB)


  • Mains Voltage and Frequency: Internal Universal Power Supply 90 - 254 VAC / 50 ~ 60 Hz
  • Power Consumption: (0.28A @120VAC) 31 Watts (34 VA)
  • Size: 19 x 5.25 x 10 inches / 483 x 133 x 254 mm (3U)
  • Shipping Size: 23 x 15 x 10 inches / 584 x 381 x 254 mm (Domestic), 23 x 15 x 11 inches / 584 x 381 x 279 mm (International)
  • Weight: 14.5 lbs / 6.6 kg
  • Shipping Weight: 25 lbs / 11.3 kg (Domestic), 28 lbs / 12.7 kg (International)

Manufacturer: Manley Laboratories
Model: MVBX
SKU: I314036-N-0-WHXB

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Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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