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Grace Design m308 Active 8-channel Isolated Direct Box , $1,995.00 - Add to Cart Skip to Product Information

Grace Design m308 Active 8-channel Isolated Direct Box

Active 8-channel Rackmount DI with Galvanic Isolation, Lundahl Transformers, 13dB Pads, and Iso/Gnd Switch
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Grace Design m308 Active 8-channel Isolated Direct Box
Grace Design m308 Active 8-channel Isolated Direct Box

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Grace Design m308 Active 8-channel Isolated Direct Box
In Stock!

Eight Channels of Industry-leading DI Performance

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Leveraging the same circuitry and sonic performance as Grace Design’s industry-leading m303 and m303s direct boxes, the company’s m308 delivers superior DI performance in an 8-channel rackmount unit for stage, studio, and installation applications that require higher channel counts. This active, galvanically isolated DI features Grace’s advanced power supply — a design that Sweetwater engineers champion for its exceptional headroom and massive dynamic range. Next, custom-wound Lundahl transformers ensure that your signal resounds with both enhanced low-end definition and pristine top-end detail. Need to tame a hot signal? The M308s features dedicated per-channel 13dB pad switches. You also get an Iso/Gnd switch, full ESD/RFI protection, and a peak indicator LED that activates at -3dB before signal clipping. All wrapped up in a rugged rackmountable chassis, the m308 is ready to take on any project with road-ready durability and state-of-the-art audio performance.

Grace Design m308 Features:

  • Active 8-channel rackmount DI box
  • Full galvanic isolation, powered via standard 48V phantom power
  • Custom-wound Lundahl transformers ensure optimal clarity and detail
  • Superior high-bandwidth design with ultra-low distortion and noise, high-dynamic-range
  • Exemplary low-frequency headroom
  • 1-Mohm input impedance accommodates any pickup or line-level source
  • Peak indicator LED activates at -3dB before clipping; power indicator LED
  • Per-channel 13dB Pad switches; Iso/Gnd switch
  • Rugged, 19-in. rackmountable chassis

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

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.