Content | User's manual
- Ultra compact phono preamplifier and equalizer
- Proper RIAA equalization
- RCA inputs and outputs
- 6.3 mm stereo headphone output connector
- Sturdy metal housing
- 12 V AC/DC adapter included
The LD Systems PPA 2 is a very compact analogue phono preamplifier, which equalises the extremely low output signal of conventional turntables to RIAA standards. It allows you to connect to devices without any phono input, such as mixers, PA power amplifiers or sound cards. The phono inputs are designed as RCA jacks, just like the line outputs; the PPA 2 also has a screw terminal for the ground conductor of the turntable and a 6.3 mm stereo jack for connecting a headset. The THD factor of the preamplifier is below 0.05% and the channel separation is -75 dB. The LD Systems PPA 2 uses a 12 V AC adapter; a bright LED indicates the power supply on the top of the sturdy metal chassis.
Product type
Other Studio and Recording Equipment
Type
Stereo Input / Stereo Output
Frequency response
RIAA Curve Hz
Signal-to-noise ratio
70 dB
THD |
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) |
PreSonusʼ popular Class A XMAX preamps are widely lauded for their clarity and transparency. Our tube preamps are beloved for their warm, smooth sound. With the Blue Tube DP V2 dual-path mic/instrument preamp, you get both types of high-quality sound in one unit.
Now weʼve improved on the classic unit with the BlueTube DP V2. The solid-state path now feeds PreSonusʼ top-of-the-line Class A XMAX™ mic preamplifier with 80 dB of variable gain—an upgrade from the original BlueTube DPʼs solid-state stage.
You still get all the secondary features you expect in a professional-grade preamp: 48V phantom power, an 80 Hz high-pass filter, -20 dB pad to control hot input signals, and a polarity-reverse switch. Each channel has an illuminated VU meter so you can visually monitor your input levels.
A Tube Drive control provides a wide range of sounds: when itʼs clicked off, youʼre using the solid-state preamp for quiet, transparent amplification; when itʼs engaged, your signals flow through the tube preamp, and you can achieve anything from gentle warmth to edgy distortion.
2 input channels, each with:
High-headroom Class A XMAX™ mic preamplifier with 80 dB gain range
12AX7 vacuum tube gain stage
Tube Drive tube-saturation control
48V phantom power
80 Hz high-pass filter
-20 dB pad to reduce hot input levels
Polarity-reverse switch
Illuminated analog VU input-level meter
Input/Output
2 balanced combo mic/unbalanced instrument inputs
2 balanced XLR main (L/R) line outputs
2 unbalanced ¼” main (L/R) line outputs
Physical
Compact 1/2U chassis
External 12 VDC, 1A power supply
| 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
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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 |
Designed for high-definition field production environments, the studio-quality MP-1 is an ideal line-driver for critical radio, television, and film applications.
The MP-1 is extremely durable and easy to use. With rugged mechanical and electrical construction and high-quality components it will provide years of superb audio performance under the most punishing field conditions.
MP-1 Key Features - Superb audio specifications
- 66 dB of gain, in eleven discrete steps
- Transformer-balanced input and output
- Phantom power - 48 volt or 12 volt
- High pass filter @ 80 Hz or 160 Hz, 6 dB/octave
- Limiter makes unit virtually "unclippable“
- High current line output drive
- Excellent immunity to RF interference.
- Battery power (two x AA)
- Durable mechanical construction
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