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The R84A: An Active Version
AEA offers the Active R84A (formerly known as the A840), a premium version of the R84 complete with JFET electronics and the same custom transformer used in our active R44. It’s basically an R84 with a built-in preamp. The active R84A mic retains the same sonic character of the R84, but with an additional 12dB of output and a stable impedance. This gives a consistent frequency response and greater flexibility with different preamps, including those found in audio interfaces for personal computers. This is great for on-the-road musicians who might have to use a different preamp each night.
The extra 12db of output is vital when recording quiet sources like vocals or soft acoustic guitars. The active circuitry also prevents noise interference on long cable runs or when operating near large lighting rigs. The R84A’s active circuitry requires standard 48-volt phantom power to operate. The premium R84A also flaunts an 18-karat, gold-plated grille.
AEA A840 Main Features:
- Higher output than R84 for versatility
- Compatible with any preamp and input source
- Low self noise of 17.5 dB
- Fast, accurate transient reproduction
- High SPL capability of 141dB
- Well-controlled, native figure-8 polar pattern
- Wide-band response from below 20Hz to above 20kHz
Operating Principle: Pressure gradient microphone
Directional Pattern: Bidirectional (Figure-of-8)
Frequency Range: 20 Hz to 20 kHz
Maximum SPL: 141+ dBSPL (1% third harmonic > 1 kHz)
Output Sensitivity: 6.3 mV/Pa (-44 dBV) into unloaded circuit
Self Noise: 17.5 dB(A)
Output Impedance: 92 Ω broadband
Recommended Load Impedance: 1.0 kΩ or greater
Powering: P48 phantom power, 7 mA
Polarity: Pin 2 high for positive pressure on front of microphone.
Connector: XLR-3M wired to a 3 m captive cable
Polar Pattern: Native bi-directional pattern
Horizontal: Level changes with angle, frequency response is consistent, –35 dB null at 90° / 270°
Vertical: Level changes with angle, reduced HF response above and below 0° / 180° axis, –35 dB null at 90° / 270°
Ribbon Thickness: 1.8 μ (0.0000018 m) of pure aluminum
Ribbon Width: 0.185” (4.7 mm)
Ribbon Length: 2.35” (59.7 mm)
Included: Custom storage / shipping case, manual
Optional: Any length cable, inquire for price and delivery.
Limited Warranty: One year parts and labor, shipping not included. Three year extended warranty if the product is registered.
Weight with Cable: 3 lb 11 oz (1.7 kg) in storage case with cable
Height: 11.6” (29.5 cm)
Width: 3.9” (9.9 cm)
Depth: 2.5” (6.4 cm)
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