DBX 286S Microphone pre-amplifier with De-Esser

186.00 incl. GR VAT

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The dbx® 286s is a full featured Channel Strip Processor that delivers a studio quality microphone/instrument preamplifier and four processors that can be used independently or in any combination. Why mic up vocals and instruments through a noisy, blurry mixer? The sonically pristine dbx 286s Mic Preamp has all the features you need, including wide-ranging […]

 

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The dbx® 286s is a full featured Channel Strip Processor that delivers a studio quality microphone/instrument preamplifier and four processors that can be used independently or in any combination. Why mic up vocals and instruments through a noisy, blurry mixer? The sonically pristine dbx 286s Mic Preamp has all the features you need, including wide-ranging input gain control, switchable +48V phantom power, and an 80Hz high-pass filter to remove low frequency hum, rumble or wind. Use the patented dbx OverEasy® compressor to transparently smooth out uneven acoustic tracks or deliver that classic “in your face” vocal performance that only a dbx compressor can. Eliminate vocal sibilance and high frequency distortion from instruments such as cymbals with the frequency tunable De-Esser. Fine-tune the Enhancer HF Detail control to add sparkle and crispness to your tracks and make adjustments to the LF Detail control to add fullness and depth to vocals and bass instruments while cleaning up the muddy low midrange frequencies. And, the separate threshold and ratio controls on the Expander/Gate allow you to subtly reduce headphone leakage or radically gate noisy guitar amps.

The dbx 286s offers a full compliment of metering and status LEDs to visually guide you to achieving the right sound. The floating balanced XLR Mic Input accepts balanced or unbalanced inputs to easily connect to professional and home studio microphones. The additional 1/4″ TRS Line Input can accept balanced/unbalanced signals to process live electronic instruments or pre-recorded tracks at mixdown. Use the Insert jack to interface between the Mic Preamp and the signal processing sections to “loop out” to external processors (such as EQ or delay unit) or to mix the Mic Preamp’s signal out to an external destination.

The cost and hassle of patching together multiple processors for use on one track can be frustrating. The dbx 286s provides you with all the mic processing you need in one box, with the shortest, cleanest signal path to keep your music sounding its best!

  • Studio quality Mic Preamp/Channel Strip Processor
  • Classic dbx Compression puts great sound within easy reach
  • Frequency tunable De-Esser reduces sibilance and high frequency distortion
  • Enhancer increases the detail and definition of the high and low frequencies
  • Program adaptive Expander/Gate
  • Insert jack allows you to add an external processor
  • Full compliment of meters and status LEDs
  • +48V Phantom Power
  • Precision detented controls
Mic Preamp Connector XLR Floating balanced, Pin 2 Hot
Mic Preamp Input Impedance ~4.2kΩ
Mic Preamp gain 0dB to +60dB
Mic Preamp Phantom Power +48VDC, applied to XLR pins 2 and 3 through 6.81kΩ resistors
CMRR >40dB, typically 55dB
Mic Preamp max input level 0.2Vrms, Gain = 30dB
Mic Preamp Equivalent Input Noise (EIN) -125dBu, 22Hz-22kHz, 150Ω source impedance
Input Connectors (line) Floating balanced, TIP Hot
Input Impedance (line) 10kΩ unbalanced, 20kΩ balanced
Max Input (line) >+21dBu, balanced or unbalanced
Input Gain Range (line) -15dB to +45 dB
Insert Connector 1/4″ TRS: Normalled; tip is Send, ring is Return
Insert Impedance >5kΩ (ring-return); 100Ω (tip-send)
Insert Max Level >+21dBu; >+20dBm (600Ω load-tip)
Insert Noise
Weight 3.00 kg

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Quick Comparison

DBX 286S Microphone pre-amplifier with De-Esser removeAVALON AD2022 DUAL MONO PURE CLASSA PREAMPLIFIER removeFOCUSRITE ISA ONE Microphone Pre-amplifier removeGOLDEN AGE PRE73 DLX Microphone preamp removeSOUND DEVICES MM-1 Portable Mic Preamp with Headphone Monitor removePRESONUS TUBE PRE V2 microphone PREAMP remove
NameDBX 286S Microphone pre-amplifier with De-Esser removeAVALON AD2022 DUAL MONO PURE CLASSA PREAMPLIFIER removeFOCUSRITE ISA ONE Microphone Pre-amplifier removeGOLDEN AGE PRE73 DLX Microphone preamp removeSOUND DEVICES MM-1 Portable Mic Preamp with Headphone Monitor removePRESONUS TUBE PRE V2 microphone PREAMP remove
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SKUDBX 286SAD2022ISA ONEPRE-73 DLXMM-1 SD APA2018-05950
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Description
ContentThe dbx® 286s is a full featured Channel Strip Processor that delivers a studio quality microphone/instrument preamplifier and four processors that can be used independently or in any combination. Why mic up vocals and instruments through a noisy, blurry mixer? The sonically pristine dbx 286s Mic Preamp has all the features you need, including wide-ranging input gain control, switchable +48V phantom power, and an 80Hz high-pass filter to remove low frequency hum, rumble or wind. Use the patented dbx OverEasy® compressor to transparently smooth out uneven acoustic tracks or deliver that classic "in your face" vocal performance that only a dbx compressor can. Eliminate vocal sibilance and high frequency distortion from instruments such as cymbals with the frequency tunable De-Esser. Fine-tune the Enhancer HF Detail control to add sparkle and crispness to your tracks and make adjustments to the LF Detail control to add fullness and depth to vocals and bass instruments while cleaning up the muddy low midrange frequencies. And, the separate threshold and ratio controls on the Expander/Gate allow you to subtly reduce headphone leakage or radically gate noisy guitar amps. The dbx 286s offers a full compliment of metering and status LEDs to visually guide you to achieving the right sound. The floating balanced XLR Mic Input accepts balanced or unbalanced inputs to easily connect to professional and home studio microphones. The additional 1/4" TRS Line Input can accept balanced/unbalanced signals to process live electronic instruments or pre-recorded tracks at mixdown. Use the Insert jack to interface between the Mic Preamp and the signal processing sections to "loop out" to external processors (such as EQ or delay unit) or to mix the Mic Preamp's signal out to an external destination. The cost and hassle of patching together multiple processors for use on one track can be frustrating. The dbx 286s provides you with all the mic processing you need in one box, with the shortest, cleanest signal path to keep your music sounding its best!
  • Studio quality Mic Preamp/Channel Strip Processor
  • Classic dbx Compression puts great sound within easy reach
  • Frequency tunable De-Esser reduces sibilance and high frequency distortion
  • Enhancer increases the detail and definition of the high and low frequencies
  • Program adaptive Expander/Gate
  • Insert jack allows you to add an external processor
  • Full compliment of meters and status LEDs
  • +48V Phantom Power
  • Precision detented controls
Mic Preamp Connector XLR Floating balanced, Pin 2 Hot
Mic Preamp Input Impedance ~4.2kΩ
Mic Preamp gain 0dB to +60dB
Mic Preamp Phantom Power +48VDC, applied to XLR pins 2 and 3 through 6.81kΩ resistors
CMRR >40dB, typically 55dB
Mic Preamp max input level 0.2Vrms, Gain = 30dB
Mic Preamp Equivalent Input Noise (EIN) -125dBu, 22Hz-22kHz, 150Ω source impedance
Input Connectors (line) Floating balanced, TIP Hot
Input Impedance (line) 10kΩ unbalanced, 20kΩ balanced
Max Input (line) >+21dBu, balanced or unbalanced
Input Gain Range (line) -15dB to +45 dB
Insert Connector 1/4" TRS: Normalled; tip is Send, ring is Return
Insert Impedance >5kΩ (ring-return); 100Ω (tip-send)
Insert Max Level >+21dBu; >+20dBm (600Ω load-tip)
Insert Noise

The AD2022 is Avalon's fourth generation of fully discrete, symmetrical Pure
Class A microphone preamplifiers. The dual mono AD2022 includes the original
sonic capabilities and transparency of the M2, M22 and M5 preamplifiers plus
several additional features, including selectable microphone source loading for
optimized cable/mic matching, improved high-voltage Class A regulated power
supplies, two high Z instrument inputs, variable-passive high pass filter, teflon/
silver wiring and doubled plated circuit boards for superior low level signal transfer.
 
AD2022 FEATURES
Symmetrical Pure Class A design, two channels
Microphone and hi-Z instrument inputs
Gain switched 4dB steps plus +/- 3dB fine output trim 
Selectable microphone input impedance matching 
Low noise -126dB EIN
Ultra high quality, low-ratio, balanced input transformer
Balanced, high-current Class A output to +36dB
Large illuminated analog VU meters and twin peak LED's
Regulated phantom power supply +48v 
Input polarity phase reverse 
High headroom +36dB input before overload
Input -20dB pad for high level signals
Sealed silver relays for all signal routing
External AC 150w toroidal power chassis
Fully discrete Class A regulated audio power supplies
Deep, musical sound-stage, transparent amplification

MICROPHONE INPUT
The AD2022 incorporates the most advanced high-performance microphone
transformer available. Split low-ratio primary windings are carefully combined
within a custom mu-metal core for extended smooth frequency response and
very low distortion.  Sealer silver relays are used for minimal signal invasion. 
The input signal selector, high pass filter, polarity-phase reverse, +48v power
and the 20dB input attenuator all utilize local sealed relay operation. A variable
passive high pass filter provides a minimum phase shift design while eliminating
low frequency rumble, wind noise and mechanical vibration at sub sonic frequencies.

SYMMETRICAL PURE CLASS A DESIGN
Two 100% discrete, high-voltage, symmetrical Pure Class A signal amplifiers
are utilized per channel. The first operates in a cascaded-cascode FET
configuration while the second stage amplifier is fully bipolar. The twin amplifiers
share the total available gain requirement. This shared architecture increases
the high level headroom capability, improves transient response and doubles the
internal bandwidth of the ultra-high performance pure Class A signal amplifiers.
OUTPUT and METERING
High-current DC coupled, Class A discrete amplifiers are utilized for the output
drive interface with +36dB capability into all known loads.  Two large, high-quality
analog VU meters indicate accurate signal readings while bi-color LED's offers
peak indication at 0dB and +20dB.

AD2022 PREAMPLIFIER SPECIFICATIONS
 
Circuit Topology:  Twin cascode FET and bipolar low level signal amplifiers,
high-voltage, 100% discrete, symmetrical Pure Class A 
Input Type and Load:  Transformer balanced low-ratio, 50, 150, 600 and 1k5
ohm input load selection  
Maximum Mic Level:  +36dB balanced XLR pin 2 hot (with -20dB passive
attenuator) 
Maximum Instrument Level  +18dB at 100k ohms instrument input level,
standard mono 1/4 inch jack 
Input Attenuator:  -20dB resistive pre transformer primary, sealed silver relay 
Phantom Power:  +48v regulated 50mA capability, sealed silver relay 
High Pass Filter:  Passive, variable from 30Hz to 185Hz @ 6dB per octave,
sealed silver relay. 
Polarity Reverse:  Sealed silver relay on microphone input 
Gain Range Input:  +20dB to +64dB in 4dB steps 
Gain  Output Range:  +/- 3dB variable conductive plastic potentiometer 
Maximum Output Level:  +36dB balanced 600 ohms, DC coupled, discrete
symmetrical Pure Class A 
Output Type:  XLR connector, pin 2 hot 
Noise EIN Unweighted:  -126dB 150 ohm 
Noise 20kHz Unweighted:  -102dB 
Distortion THD, IMD:  0.05% nominal 
Frequency Response -3dB:  1Hz to 120kHz transformer limit 
System Bandwidth:  DC to 1MHz 
Output Meter:  High quality, illuminated analog VU meter 0dB = +4dB. 
Peak Meter:  Bi-color LED's 0dB and +20dB peak detection circuit. 
AC power supply B2T:  External toroidal 100V to 240V, 50-60Hz selectable,
150 watts maximum. 
Cables:  90V ac, 4 pin male power input connector, B2T required, internal
DC regulation  
Dimensions:  19 x 12 x 3.5 in (482 x 305 x 89mm) 
Weight:  15lbs (6.8kg) 
Dimensions - Shipping Carton:  24 x 21.5 x 7.5 in (610 x 546 x 190mm)  
Weight - Packed:  25lbs (11.4kg) 

ISA OneClassic Single-channel Microphone Pre-amplifier with Independent D.I. Key Features ISA Series Transformer-based Pre-amplifier Encased in a rugged and portable chassis, ISA One offers the classic Focusrite microphone pre-amplifier at its lowest cost to date. Flexible Independent D.I. Channel ISA One is ideal for both engineers and demanding performers alike, featuring independent gain control, an output for routing to an amp, an independent XLR output on the rear and routing to the optional ADC. Switchable Impedance Choose one of four carefully selected input impedances, including the original ISA 110 setting, to suit any microphone. Optional Stereo 192kHz ADC This optional card embodies cutting-edge conversion technology, incorporating Focusrite analogue circuitry to deliver the best A-D performance in its class (Dynamic range of 119dB). Rugged Custom Flight Case Built to protect your ISA One from the rigors of the road. Rugged plywood construction with a solid polypropylene exterior and reinforced corners. Headphone Output with Volume Control ISA One can feed either a sum of the two inputs to the headphones output, or an external stereo cue mix (such as a stereo mix feed from an interface) via two TRS Jack inputs on the rear of the unit. Dedicated Insert Point Allows you to place extra processing between the pre-amplifi er or D.I. and the optional converter, such as an EQ or compressor. Specifications Analogue Channel Inputs
  • XLR Mic input
  • One XLR and one TRS line input
  • XLR Instrument input TRS Jack
  • External ADC input TRS Jack
  • TRS jack return
Analogue Channel Outputs
  • TRS jack send
  • XLR balanced line output
  • XLR DI output
  • TS jack DI through
Analogue Channel Additional I/O
  • TRS Jack cue mix left input
  • TRS Jack cue mix right input
  • 1/4” TRS Jack headphones output
Mic Input Response
Gain range 0dB to 60dB in 10dB steps + 20 dB of variable gain
Input Impedance Switched Impedance setting Equivalent Input Impedance at 1kHz Low = 600 Ohms ISA110 = 1400 Ohms Med = 2400 Ohms High = 6800 Ohms
EIN (Equivalent Input Noise) -126dB measured at 60dB of gain with 150 Ohm terminating impedance and 22Hz/22kHz band-pass filter
Noise Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter -97 dBu
Signal-to-Noise Ratio 106 dB relative to max headroom (9dBu)
Total Harmonic Distortion + Noise Measured at medium gain (30dB) with a 1kHz -20dBu input signal and with a 22Hz/22kHz band-pass filter
Frequency Response At minimum gain (0 dB) -0.5dB down at 10Hz and -3dB down at 125kHz
At maximum gain (60dB) -3dB down at 16Hz and -3dB down 118kHz
CMRR (Common Mode Rejection Ratio) 98dB (Channel 1, 1kHz, maximum gain with +24 dBu input)
Crosstalk Channel to Channel With 10dB@1kHz input to chA, chB output =104dBrA. With 10dB@10kHz input to chA, chB output = 84dBrA
Line Input Response
Gain range -20dB to +10dB in 10dB steps + 20 dB of variable gain
Input Impedance 10 kΩ from 10 Hz to 200 kHz
Noise Noise at main output with gain at unity (0 dB) measured with 50 Ω source impedance and a 22Hz - 22 kHz band pass filter -96 dBu
Signal-to-Noise Ratio Measured with a 22 Hz-22 kHz band pass filter 120 dB relative to max headroom (24 dBu) 118dB relative to 0dBFS (+22dBu)
Total Harmonic Distortion + Noise Measured with a 0 dBu input signal, and a 22 Hz-22 kHz band pass filter 0.0001%
Frequency Response At unity gain (0 dB) -0.3dB down at 10Hz and -3dB down at 200kHz
Instrument Input Response
Gain range 10dB to 40dB continuously variable
Input Impedance High = greater than 1M Low =greater than 300k
Noise Measured with 22 Hz-22 kHz band pass filter Minimum gain (+10 dB): -92 dBu Maximum gain (+40dB): -62dBu
THD At minimum gain (+10)
Frequency Response At minimum gain (+10 dB) -10dB input: 10Hz-100kHz +/- 0.6dB
At maximum gain (+40 dB) -40dB input: -2.5dB down at 10Hz and 0dB at 100kHz
Meters
Moving Coil (MC) Meter factory calibrated to 0VU = +4dBu with 1kHz sinewave. With the VU Cal button pressed the meter can be adjusted on the rear panel to allow 0VU to equal +10dBu to +26dBu with the centre detent being equal to +22dBu.
Peak LED Meters Calibrated in the detent position for 0dBFS = +22dBu, calibration is adjustable on the rear panel to allow 0dBFS to equal +10dBu to +26dBu
Routing for MC and Peak1 meter is after the HPF, pre insert send or switched post insert return. Peak2 is always pre ADC channel 2, which can be fed by external input or Instrument input.
LED Levels As follows, when peak calibration is set to center detent on the rear panel. (This is when using the internal ADC). 0 = +22dBu -2 = +20dBu -6 = +16dBu -12 = +10dBu -18 = +4dBu -42 = -20dBu
Frequency Response At minimum gain (+10 dB) -10dB input: 10Hz-100kHz +/- 0.6dB
At maximum gain (+40 dB) -40dB input: -2.5dB down at 10Hz and 0dB at 100kHz
High-Pass Filter
Roll-Off 18 dB per octave (3 pole filter)
Frequency Fixed 75Hz measured at the 3dB down point
Weight and Dimensions
W x D x H 220mm (W) x 104mm (H) x 254 - 290mm (D - top to bottom) 8.66" (W) x 4.1" (H) x 10" - 11.4" (D - top to bottom)
Weight 3.9 kg 8.6 lbs

The PRE-73 DLX is a one-channel vintage style microphone-, line- and instrument preamplifier. The signal path uses only discrete components like resistors, capacitors and transistors. The line and microphone input and the line output are transformer balanced, using three different transformers, each one optimized for its purpose.
This is the way audio components were built before integrated circuits became available. The subjective sound quality delivered by vintage equipment is often prefered over the one delivered by modern units, a situation that is even more obvious now when music is recorded with clean-sounding digital audio equipment.

The circuit used in the PRE-73 DLX is similar to the preamp section in the classical 1073 module with a corresponding sound character that is warm, punchy, sweet and musical. These classic characteristics have been heard on countless recordings through the years and it is a versatile sound that works very well on most sound sources and in most genres. The essence of this sound is now available at a surprisingly low cost, making it available to nearly everyone.

FEATURES

- Vintage Style electronics. No intergrated circuits in the signal path.
- Maximum gain on the mic input is 80 dB, enough to handle passive ribbon mics with quiet sound sources.
- Gain range on the Line input: -20 to + 10 dB.
- Switchable impedance on the mic input, 1200 or 300 Ohms, will change the tone of most mics.
- Switchable phantom power and absolute phase.
- A high-impedance instrument input for any sound module, electric guitar or bass.
- A simple but effective 4-step LED output level meter.
- The output level controls makes it possible to make fine gain adjustments and also to overload the main gain stage(s) for more character and then lower the signal to a suitable level before the output stage.
- Combo XLR/TRS input jacks and separate output XLR and TRS jacks for flexible connections.
- Insert jack for inserting EQ´s and other units.
- External high power power supply to avoid interaction with the audio circuits and transformers.
- A solid build quality that will last many years of normal use.

The PRE-73 DLX has a number of improvement and new features compared to the PRE-73 MKII:
- Tantalum capacitors in the signal path.
- Selectable 1073-style high pass filter, 50Hz, 80Hz, 160Hz and 300Hz.
- Output Attenuator -7, -14, -21 and -28 dB (located after the output transformer) allows overdriving the output stage and the output transformer for added character by lowering the output signal to a suitable level.
- The circuit board is prepared for Carnhill Mic and Line transformer and high pass inductor.
- The Insert jack can be switched in/out from the front panel. An internal jumper can select that the Insert jack always has an output signal.
- Switchable 600 ohm Output Termination and Ground Lift on the back panel.
- Selectable Active or Passive DI input and selectable input impedance in active mode, Hi Z or 100 kohm, by internal jumpers.
- The DI can signal can be selected to pass or bypass the mic input transformer by internal jumpers.
- Relays are used to control internal switching for DI input, Phantom power, Mic Low Z, Insert and Phase for shorter circuit board signal paths. The relays are controlled by front panel switches.
- Revised gain switch for added headroom.
- Circuit board star grounding scheme.
- Revised power supply with separate regulators for the audio circuits and relay and LED circuits.

Highly versatile and portable, Sound Devices' MM-1 is a single-channel, portable microphone preamplifier with a powerful headphone monitoring function. Proven in mission-critical applications, the high-performance microphone preamplifier uses a transformer-balanced input and output with a bipolar ±15 volt power supply to produce low-noise, low-distortion gain at all switch positions. It features an "unclippable" dual-stage limiter and two-position high-pass filter. Flexible microphone powering provides phantom power at 48 volts or 12 volts and 12-volt T-power. It is powered from two-AA batteries or external 5-18 VDC. The MM-1 is at home in high-definition television production, corporate/industrial environments, radio/television announce booths, and music production. Its headphone monitor is an advantage in applications where communications channels or mix-minus feeds need to be monitored in headphones. The user can monitor both microphone audio and external audio sources in headphones with level control. The MM-1 is designed to be durable. Its aluminum chassis, oversized end panels, machined knobs, and panel mounted connectors assure reliable mechanical operation.
  • Maximum of 66 dB of gain, in eleven discrete steps
  • Dynamic range exceeding 120 dB
  • 10 Hz to 50 kHz audio bandwidth
  • High immunity to RF interference
  • High current line output driver
  • Transformer-balanced input and output
  • Extended range peak limiter via dual opto-isolators makes preamplifier virtually "unclippable“
  • Selectable 48-volt / 12-volt phantom power or 12-volt "T" power
  • High-pass filter @ 80 or 160 Hz, 6 dB per octave
  • Headphone monitoring of microphone audio, monitor audio, or a mix of both
  • Monitor input accepts mono, balanced or unbalanced line-level inputs on 1/4-inch tip-ring-sleeve connector
  • Separate level control of Monitor gain and overall headphone gain
  • Split ear function via DIP switches
  • Internal battery power (two-AA)
  • Excellent battery life with alkaline and NiMH rechargeable batteries
  • External 5-17 VDC powering (plug included)
  • High-strength aluminum chassis with durable belt clip

At PreSonus, weʼve been designing preamps for a long time, and we always focus on audio quality first. So when we decided to upgrade our popular TubePre V2, we focused on improving an already high-quality sound—without jacking up the price. Like the originalTubePre, the new version is a fully professional tube preamp, with a dual-servo (no capacitors) gain stage that lets you boost the program signal to smoking hot levels without significantly increasing the background noise. Discrete components and high-voltage operation offer dynamic range and detail not found in other single-channel tube preamps in its class.

Housed in a rugged case, the TubePre V2 rear panel sports separate unbalanced, ¼” instrument and balanced, XLR mic inputs and unbalanced ¼” and balanced XLR line outputs. Weʼve included all of the extras you need for professional operation including a high-pass filter, phantom power for condenser mics, polarity reverse switch, and a backlit VU meter.

Weight3.00 kg11.40 kg4.00 kg3.60 kg3.00 kg2.00 kg
DimensionsN/AN/AN/AN/AN/AN/A
Additional information
Weight 3.00 kg
Weight 11.40 kg
Weight 4.00 kg
Weight 3.60 kg
Weight 3.00 kg
Weight 2.00 kg