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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) |
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- Ultra-high quality 8-channel A/D and D/A interface for virtually any digital recording/mixing environment
- 8 state-of-the-art MIDAS designed Mic Preamplifiers
- Phantom power on all microphone inputs
- Reference-class Cirrus Logic 24-bit converters for ultimate signal integrity
- Processes 48 and 44.1 kHz sample rates
- External sample rate synchronization via word clock or ADAT input
- Optical ADAT in/out interface for ultimate compatibility
- All mic/line inputs routed to the ADAT output
- ADAT input routed to all Line outputs
- “Planet Earth" switching power supply for maximum flexibility (100 - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving
- High-quality components and exceptionally rugged construction ensure long life
- Conceived and designed by BEHRINGER Germany
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Mic Inputs
• Frequency response at minimum gain (0dB): -0.35dB at 20Hz and –3dB at 122kHz
• Frequency response at maximum gain (60dB): –2.5dB at 20Hz and –3dB 103kHz
• Gain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim
• Maximum headroom: +7.4dBu
• THD+N: 0.0009% (measured at 1kHz -20dBu input signal, at 30dB gain setting, with a 20Hz/22kHz bandpass filter)
• Noise EIN: -126dB (measured at 60dB of gain with 150Ω termination and 20Hz/22kHz bandpass filter)
• Noise at main output with unity gain: -98dBu (measured with a 20Hz/22kHz bandpass filter)
• SNR: 123dB (relative to max output 25dBu)
• SNR: 120dB (relative to 0dBFS (+22dBu)
• CMRR: 88dB.
• Input Impedance, variable: 600Ω, 1400Ω, 2400Ω, 6800Ω
Line Inputs
• Frequency Response at unity gain (0dB): -0.3dB at 20Hz and –3dB at 94kHz
• Gain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim
• Maximum headroom: +25.4dBu
• THD+N: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)
• Noise at main output with unity gain: -91dBu (measured with a 20Hz/22kHz bandpass filter)
• SNR: 116dB (relative to max output 25dBu)
• SNR: 113dB (relative to 0dBFS +22dBu). Input Impedance: 10kΩ
Instrument Inputs
• Frequency Response at +10dB gain: -0.2dB at 20Hz and 0dB at 200kHz
• Frequency Response at +40dB gain: -3dB at 20Hz and –3dB at 38.4kHz
• Gain range: +10dB to +40dB continuously variable
• Maximum headroom: +11.5dBu
• THD+N: 0.006% (measured with –20dBu input signal, at minimum gain (+10dB), with a 20Hz/22kHz bandpass filter)
• Noise at main output with minimum gain (+10dB): -95dBu (measured with a 20Hz/22kHz bandpass filter)
• Input Impedance = >1MΩ
High Pass Filter
• Roll off = 18dB per octave 3 pole filter
• Frequency range: 16Hz to 420Hz (continuously variable, measured at the 3dB down point)
Meters
• 6 LED meter is calibrated 0dBFS = +22dBu (the maximum level which can be correctly converted by the optional internal A/D converter before overload occurs). The meter calibration points are as follows:
Meter panel calibration value in dBFS / Equivalent dBu value
0dBFS / +22dBu
-2dBFS / +20dBu
-6dBFS / +16dBu
-12dBFS / +10dBu
-18dBFS / +4dBu
-42dBFS / -20dBu
Front and rear connectivity
Analogue Channel Inputs (Inputs 1-4)
• 4 instrument 1⁄4” TS jack inputs on front panel
• 4 microphone XLR inputs on rear panel
• 4 line 1⁄4” TRS jacks on rear panel
• 4 insert return 1⁄4” TRS jacks on rear panel
• 4 ADC XLR inputs on rear panel
Analogue Audio Outputs (Outputs 1-4)
• 4 line XLR outputs on rear panel
• 4 insert send 1⁄4” TRS jacks on rear panel
Other I/O
• IEC power input connector 100Vac – 240Vac
Front Panel Indicators
• 8 output meters, 6 segment
• 4 30-60 mic gain range selection indicator
• 4 +48V phantom power indicator
• 4 Phase indicator
• 4 Insert In indicator
• 4 Filter In indicator
• 4 Input selection indicators (Mic, Line, Inst)
• 4 Z In microphone input impedance selection indicators (Low, ISA110, Med, High) Clock select indicators (44.1, 48, 88.2, 96, 176.4, 192)
• Ext clock indicators (Lock, Word clock, 256X)
Weight
5.5kg
12.2lbs
Dimensions (W x H x D)
480mm (W) x 88mm (H) x 280mm (D)
19" (W) x 3.5" (H) x 11" (D)
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Two channel classic Focusrite ISA transformer-based preamps Front panel, per channel: - 1/4" instrument input
- Variable input impedance - Low, ISA 110, Medium, High
- Input selection - Mic, Line, Instrument
- 0 - 30 dB/30 - 60 dB gain switch
- Phantom power switch
- Phase invert switch
- 0 - 60 dB gain in 10 dB steps
- 0 - +20 dB continuously variable trim
- Variable high-pass filter with on/off switch
- Insert point on/off switch
- Eight-LED user-calibrated level meters
- Single power switch
Rear panel, per channel: - XLR-F mic inputs
- 1/4" TRS line inputs
- 1/4" TRS Sends
- 1/4" TRS Returns
- XLR-M line output
- Single peak meter calibration dial
- Single IEC power socket
Measured Performance Maximum Input and Output Levels | Maximum Output Level |
+24 dBu with a THD+N
| Maximum Microphone Transformer Input Level | +7 dBu with a THD+N | Mic Input Response | Gain range | 0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim |
Input Impedance
| Switched Impedance setting
Equivalent Input Impedance at 1 kHz | Low = 600 Ω
ISA 110 = 1.4 kΩ
Med = 2.4 kΩ
High = 6.8 kΩ | EIN
(Equivalent Input Noise) | Measured at 60 dB of gain with 150 Ω
source impedance and 22 Hz-22 kHz band pass filter | -127 dB |
Noise
| Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter | -97 dBu |
Signal-to-Noise Ratio
| Measured with 150 Ω source impedance and 22 Hz-22 kHz band pass filter | 121 dB relative to max output +24 dBu |
Total Harmonic Distortion + Noise
| Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter |
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Frequency Response
| At minimum gain (0 dB) |
-0.5 dB at 10 Hz,
-1 dB at 135 kHz, relative to 1 kHz
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At +60 dB gain
| -6 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz |
CMRR (Common Mode Rejection Ratio)
| -94 dB for mic input at 60 Hz for max. output = +24 dBu
-91 dB for mic input at 10 kHz for max. output = +24 dBu |
Crosstalk Channel to Channel
| Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB | Line Input Response |
Gain Range
| -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim |
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 |
-97 dBu
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Signal-to-Noise Ratio
| Measured with 50 Ω source impedance and a 22 Hz-22 kHz band pass filter |
121 dB relative to max output +24 dBu
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Total Harmonic Distortion + Noise
| Measured with a 0 dBu input signal, +10 dB of gain and a 22 Hz-22 kHz band pass filter |
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Frequency Response
| At unity gain (0 dB) | -0.3 dB at 10 Hz,
-1 dB at 80 kHz, relative to 1 kHz |
Crosstalk Channel to Channel
| Line input, with I/P = 0 dBu, gain = 0dB
@ 1 kHz input to channel A |
Channel B output
= -91 dB
| Instrument Input Response |
Gain Range
| +10 dB to +40 dB continuously variable trim |
Input Impedance
| > 2 MΩ |
Noise
| >Measured with 22 Hz-22 kHz band pass filter | Minimum gain (+10 dB) = -95 dBu |
Frequency Response
| At minimum gain (+10 dB) |
-0.1 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz
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At maximum gain (+40 dB)
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-2.5 dB at 10 Hz,
-1 dB at 110 kHz, relative to 1 kHz
| High-Pass Filter |
Roll-Off
| 18 dB per octave (3 pole filter) |
Frequency Range
| Continuously variable from 16 Hz to 420 Hz (-3 dB) | Weight and Dimensions |
W x D x H
| 480 mm x 280 mm x 44 mm |
Weight
| 3.7 kg |
| Vacuum Tube Mic Preamp. 12AX7 Vacuum Tube. +48V Phantom Power, 20dB Pad.
This premium tube mic/line preamp features an integrated limiter for studio,
live and hard disk recording applications. It features a carefully-selected
12AX7 vacuum tube with Behringer's UTC technology for exceptional warmth
and lowest noise. Using the MIC100 is a great way to eliminate the "dull"
sound of standard digital recorders & sound cards. Also, it perfectly
complements studio-grade condenser mics. When used as a high-end DI-box,
it ensures outstanding signal integrity. Features also include a phase reverse
switch, +48 V phantom power, a 20 dB pad, and balanced I/O.
The heart of the Tube Untragain is an extremely low-noise microphone preamp
circuitry that uses discrete components and produces a highly trans-parent
sound. In combination with Behringer's tube technology, the operational amplifiers
4580 and a sophisticated circuit topology, the Tube Untragain yields excellent
noise and distortion properties. The innovative UTC circuitry that has been developed
by our engineering team offers an abundance of sound-shaping possibilities.
Absolute musicality was Behringer's major goal when we designed the Tube
Untragain. The result is a device that, thanks to our tube circuitry, lends an
incredible punch to percussion instruments. On the other hand, instruments
that are rich in upper harmonics will receive more transparency. The sound
will be warm, detailed and brilliant.
Technical Description
Specifications
XLR input Connector: Balanced/unbalanced
Type: Transformerless, DC-decoupled input
Impedance: Approx. 2 kOhms
Maximum input level: +7 dBu / 20 dB with pad
1/4 in. TRS input Connector: Balanced/unbalanced
Type: Transformerless, DC-decoupled input
Impedance: Approx. 1 MOhms
Maximum input level: +16 dBu / 20 dB with pad
Audio outputs Connectors: XLR and 1/4 in. TRS connector balanced/unbalanced
Type: Transformerless, DC-decoupled output
Impedance:
Approx. 700 Ohms balanced
Approx. 350 Ohms unbalanced
Maximum output level: Approx. +26 dBu @ 100 k§?
System Frequency Response Mic input: |
Applications
Console input extending for both Digital and Analog mixing consoles in Studio, Live and Broadcast Mic Pre-amps for ADAT/ Hard Disk/ Multitrack Recording Innovation If you love your compact Digital (or Analog) mixing console, but wish it had more microphone inputs, ARX has the solution ? the 8 Pre: eight channels of superb sounding Microphone Pre-amps in a compact 1 RU chassis. The 8 Pre is the ideal console extender for those times when you need more microphone inputs. Now you can put those unused line inputs to good use, and who knows - the 8 Pre pre-amps sound so good that you?ll probably end up using them all the time instead of the ones that came with your mixer! Superb Audio Quality The 8 Pre?s ultra low noise figures come from extensive use of premium components plus care and attention to board design and layout. The result is superb, transparent audio quality and the headroom to handle anything that a mic can throw at it. Gain is adjustable from 20 db through to 60 dB via a trim control on the front panel, plus we?ve included a ?20dB Pad switch to tame the hottest condenser mic output if required. The Clip status LED lights up 1 dB before the onset of clipping, just to warn you you?re getting close.Phantom power is switchable in banks of four channels: 1 through 4, 5 through 8. A Phase reverse switch is also provided on each pre-amp channel to eliminate any close miking problems. In short, the ARX 8 Pre is the mic Pre-amp that you?ll wish the console manufacturer had used. It provides a unique solution to today?s multiple Mic Pre-amp requirements.
T E C H N I C A L S P E C I F I C A T I O N S Input Gain 20dB to 60dB Input Pad ?20dB Input Impedance 4 KOhm Input Headroom +23dB Output Impedance 300 Ohm Output Level (Max) +23dB Frequency Response 20Hz ? 20KHz ±0.2 dB Signal to Noise ratio (Gain set @ 20 dB) ?93dB Unweighted, ?99dB ?A? weighted Distortion @ Unity Gain .004%, 20 Hz ? 10 KHz Dynamic Range 116 dB Phantom Power 48 VDC Input Connectors Balanced XLR Output Connectors Balanced TRS jack Clip Indicator Illuminates 1 dB prior to clipping Power Requirements 100/120 V AC, 220/240 V AC Weight 5 lbs/2.2 Kg Dimensions 19“W x 1?“H x 6“D, 482 x 44 x 155mm |
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