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Grace Design m501 500 Series Microphone Preamp , $779.00 - Add to Cart Skip to Product Information

Grace Design m501 500 Series Microphone Preamp

Single-channel 500 Series Preamplifier Module with 48V Phantom Power, 75Hz Highpass FIlter, 1/4" hi-Z Instrument Input, and Ribbon Microphone Mode
Grace Design m501 500 Series Microphone Preamp
Grace Design m501 500 Series Microphone Preamp

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Grace Design m501 500 Series Microphone Preamp
In Stock!

Put Grace Design Clarity Into Your 500 Series Rack!

This article was Written By

Our Product Research Team

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Check out the m501 - Grace Design's first-ever 500 series module. Packaged into this convenient 500 series format, the m501 actually is actually a version of Grace Design's popular m101 preamp. It will fit inside any 500 Series module, which it requires in order to operate. This fully balanced, transformerless module features a 12-position rotary gain switch, hi-Z input switching, and a ribbon microphone mode that deactivates the onboard phantom power. A highpass filter and a trim pot are also onboard the Grace Design m501.

Grace Design m501 500 Series Microphone and Instrument Preamplifier at a Glance:
  • Musical clarity for the 500 series
  • The secret weapon of DI recording
  • A ribbon-friendly approach to preamplification
Musical clarity for the 500 series

Because of the 500 series rack format's growing popularity among the makers of high-end audio equipment producers, there are already many modules in this configuration that offer the signature characteristics of industry favorite microphone preamplifiers and signal processors. In fact, one of the major advantage of owning a 500 series rack lies in its flexibility to accept relatively inexpensive components in a "pick and choose" configuration, so you can get exactly the tonal qualities that you are looking for in a single unit. Unlike most of the preamplifiers formatted for the 500 series rack, the Grace Design m501 features the same natural transparency of the m101. By adding a m501 to your 500 series rack, you gain the ability to fully exploit the sonic characteristics of specific signal processors without adding the more coloration from your microphone preamplifier.

The secret weapon of DI recording

It might not be the industry's best kept secret, but the hi-Z circuitry of the m101, the same found in the m501 is exceptionally good for recording direct for the purposes of reamplification. Because of the m101 and m501's signal path doesn't rely on potentially noisy transformation stages, the tone of the output remains more faithful to the incoming sound source than with most other preamplifiers. For guitars, that means that if you record a direct input signal with the m501, you'll be better able to reproduce the original performance when you either apply an amp model plug-in in your DAW or run the signal back out to a guitar amp for reamplification.

A ribbon-friendly approach to preamplification

One more reason to add a Grace Design m501 to your 500 series rack is the capability it gives you to properly preamplify ribbon microphones. Ribbon microphones tend to operate on much lower impedances, which results in a lower output when used with modern, high-impedance gear. By using the m501's ribbon microphone mode, the input circuitry switches to better accommodate the ribbon mic's signal, which dramatically boosts its output and adds depth to the sound. For added safety, ribbon mode also switches off phantom power, which would destroy the delicate ribbon of most ribbon microphones.

Grace Design m501 500 Series Microphone and Instrument Preamplifier Features:
  • 500 series single-channel preamplifier version of m101
  • 12-position rotary gain switch and hi-Z input switching
  • Ribbon mode deactivates the onboard 48V phantom power
  • Onboard highpass filter and trim pot
  • Certified by the API VPR Alliance
  • Requires a 500 series module to work
Put the natural, musical sound of Grace Design's m501 preamplifier into your handy 500 series rack! Quality Gear from Grace Design

Grace Design has been providing audio professionals with some of the finest tools available since 1994, when founder Michael Grace brought his single-order audio product business into the mainstream. Over the years, Grace Design has consistently developed new products and technologies that keep pace with the demands of recording engineers worldwide. Grace Design's product line has evolved into a definitive collection of microphone preamplifier configurations and other unique professional audio products. Their outboard microphone preamplifiers and direct-to-tape recording gear set new standards in professional audio production. That's always been Grace Design's goal.

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.