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AEA RPQ Ampliar

AEA RPQ

The AEA RPQ Ribbon Preamp with Curve-Shaping provides two channels of high-quality, high-gain, low-noise microphone preamplification, and unlike the TRP, provides phantom power for active electronics. Building on the success of AEA's TRP ("The Ribbon Pre"), we engineered a recording toolkit packed full of professional solutions for your recording needs. 

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RPQ

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The AEA RPQ Ribbon Preamp with Curve-Shaping provides two channels of high-quality, high-gain, low-noise microphone preamplification, and unlike the TRP, provides phantom power for active electronics. Building on the success of AEA's TRP ("The Ribbon Pre"), we engineered a recording toolkit packed full of professional solutions for your recording needs. Particularly well-suited for use with ribbon microphones, it delivers the speed, precision, quietness, and headroom needed for today's high-resolution recordings. The NoLoad™ input impedance above 10 kΩ means the RPQ won't load down a mic and change its sound. The JFET circuit design generates up to 80 dB of clean and quiet gain, with extended bandwidth from below 1 Hz to beyond 200 kHz, for dynamic range and transient response that complements all microphones. Engineers have discovered that the RPQ also complements their moving coil, tube and solid-state mics. By virtue of its sonic qualities and versatility, the AEA RPQ is the tool of choice for all microphones whenever a true and pristine signal path is desired.

Your Sound At Your Fingertips
With mixing consoles disappearing from control rooms, dedicated preamps can take on the role of providing a high-quality front end, giving you intuitive control to make critical decisions during tracking rather than "fixing it in the mix". The RPQ's CurveShaper EQ gives you the tools to control your ribbons right at the start of the signal path. Switchable and tunable low frequency (LF) and high frequency (HF) controls allow you to tame proximity problems and provide HF extension and slope control. The high-frequency CurveShaper™ excels at adding a touch of air or presence, and the low-frequency control easily removes boxiness and boominess in a fast and unobtrusive way. Ribbon mics are capable of delivering strong subwoofer lows, and can have a significant bass proximity effect. Such strong low-frequency content can mask high-frequency intelligibility, so the tunable LF filter was engineered to tame low-frequency energy to appropriate levels. Its -20 dB shelving curve is ideally suited to reduce excessive proximity effect, opening up new possibilities to use ribbon mics in close-up applications.

The HF filter enables you to extend the high end by adding a little extra presence or "air" to a recording. Its unique bell curve compensates for the high-frequency roll-off that is inherent to most ribbon microphones. But beyond ribbon mics, the smooth HF filter is remarkably well suited for brightening up condenser mics used at a distance or even as a clean and transparent high-frequency boost on the 2-bus to freshen up a mix.

The Impedance Matching Myth
Passive microphones like ribbons and moving-coil transducers interact with the input impedance of the preamp. If the impedance of the preamp is too low, the microphone will have to work harder to send a signal down the line. Additionally, the bandwidth (particularly in the low end) will be limited. For best voltage transfer, the impedance of the preamp should be at least five times the microphone's output impedance. Many microphones have a nominal impedance of about 200 Ω, leading to the assumption that a preamp impedance of 1.0 to 1.5 kΩ should be fine. However, passive microphones, and ribbons in particular, have an output impedance that rises towards low frequencies and can easily get as high as 1000 Ω at resonance, resulting in a 6 dB loss at this frequency with a low impedance preamp. A preamp impedance of significantly more than the commonly seen 1.0 to 1.5 kΩ is beneficial for all passive ribbons and moving-coil microphones. All AEA preamps have input impedances of at least 10 kΩ for these reasons. Microphone loading because of low impedance preamps can lead to interesting creative results, but AEA's NoLoadTM inputs will guarantee highest sensitivity and bandwidth in all situations.

Características 

  • + Two channels with 80 dB of sweet and quiet JFET gain for all mics
    + AC (phantom power) and DC coupled (no phantom) inputs
    + High frequency CurveShaper™ EQ and low frequency proximity control
    + Switchable phantom power, polarity and EQ

Especificaciones

Gain at 1kHz: 80 dB of gain at 1kHz, balanced-in to balanced-out
Noise figure, rms A-weighted: < 2 dB
EIN: < -128 dBu A-weighted, 150 W resistive source
Balanced Microphone Input Impedance: > 10 kO
Color LEDs: Green, red, and yellow LEDs indicate line level
XLR output max level into 600O load: +28 dBu, balanced; +22 dBu, unbalanced
TRS output max level into 100 kO load: +22 dBu, unbalanced
Physical Features

External Features: 

  • + Grayhill series 71 stepped gain switch
    + Rotary potentiometers detented at 12:00 o'clock position
    + Metallic blue and steel gray powder-coat finish
    + Silkscreened engraved legends and single line schematic
    + Detachable rack-ears included

Dimensions: 
1 RU steel and aluminum chassis: 17.25" w, 11" d, 1.7" h (44 cm x 28 cm x 4.3 cm)
Weight: 6.75 pounds (3.1 Kg)

Reseñas

http://tapeop.com/reviews/gear/73/rpq-mic-preamp/
https://www.soundonsound.com/sos/nov09/articles/aearpq.htm
http://www.mixonline.com/news/others/aea-rpq-ribbon-mic-preamp-review/370352 

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AEA RPQ

AEA RPQ

The AEA RPQ Ribbon Preamp with Curve-Shaping provides two channels of high-quality, high-gain, low-noise microphone preamplification, and unlike the TRP, provides phantom power for active electronics. Building on the success of AEA's TRP ("The Ribbon Pre"), we engineered a recording toolkit packed full of professional solutions for your recording needs. 

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