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AEA RPQ503 500 Series Mic Preamp , $799.00 - Add to Cart Skip to Product Information

AEA RPQ503 500 Series Mic Preamp

500 Series Microphone Preamp with Phantom Power, Polarity Reverse, and Highpass Filter
Item ID: RPQ503
AEA RPQ503 500 Series Mic Preamp
In Stock!

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AEA RPQ503 500 Series Mic Preamp
In Stock!

Versatile, High-gain 500 Series Preamp from AEA

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Our Product Research Team

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Derived from AEA’s 3rd-generation RPQ3 500 Series mic preamp, the RPQ503 delivers the same rich, natural sound, while adding a sweepable 2-band shelving EQ for quick, convenient signal shaping. With its ultra-low noise, low-distortion op-amps, high 68KΩ input impedance, and 85dB of clean mic gain, the RPQ503 serves up your microphone and line-level signals with pristine high fidelity. The RPQ503 incorporates the highly responsive EQ section of the AEA RPQ3, featuring LF and HF boost and cut controls on custom, dual-concentric potentiometers. With its prodigious gain, transparent sonics, onboard EQ, and budget-friendly price tag, the AEA RPQ503 is a performance- and value-packed preamp that can do justice to every mic in your locker.

Expanded EQ section

While many preamps, such as AEA’s excellent TRP500, have an integrated highpass filter to mitigate unwelcome low-frequency content such as proximity effect and rumble, the RPQ503 gives you a full-fledged 2-band equalizer for much greater control. Equipped with intuitive controls and sweepable frequency selector knobs, the EQ offers 20dB of boost and cut for both low- and high-frequency bands, providing a handy tool for tweaking your sound at the outset of the signal path. The RPQ503’s EQ section builds upon AEA’s CurveShaper circuitry, which is renowned for its relaxed, natural sound — even with aggressive boosting.

Bring out the full potential in all your microphones

Engineers at Sweetwater value the RPQ503 for its sweet, musical, and articulate sound and its ability to bring out the full potential of every microphone in your locker. With 85dB of quiet gain on tap, the RPQ503 captures the full, vibrant resolution of your low-output ribbon and dynamic microphones without adding noise to your mix. This mic pre also includes a mic/line switch, switchable phantom power, and polarity reverse. Anyone searching for a great-sounding, versatile mic preamp with loads of clean gain will get lots of mileage out of the AEA RPQ503.

AEA RPQ503 Features:

  • 500 Series mic/line preamp with sweepable 2-band EQ
  • AEA Gen 3 preamp circuitry
  • 68KΩ input impedance (phantom power off)
  • Maximum gain (@1kHz): 85dB
  • Mic gain control: 12-position switch from +7dB to +85dB
  • Output trim control: 0dB to +20dB (continuously variable)
  • 2-band EQ: first-order shelving, 20dB max boost/cut
  • Center detents on EQ gain pots
  • LF: 40Hz–675Hz (continuously variable)
  • HF: 2kHz–28kHz (continuously variable)
  • Mic/Line, phantom power, polarity reverse switches
  • Line input bypasses mic pre
  • LED signal level indicators:
  • Anodized aluminum front panel

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.