Deals

Equipboard helps you discover, compare, and find the right gear for your sound.

Sign up Log in

Artist or band Music gear Music gear to an artist Report a duplicate

Contact us About Merch store

© Equipboard Inc.

Home
... Musical Instruments
Studio Recording Gear
Signal Processors
Direct Boxes
Grace Design
Grace Design m308 Active 8-channel Isolated Direct Box

Grace Design m308 Active 8-channel Isolated Direct Box main image

Grace Design m308 Active 8-channel Isolated Direct Box

Grace Design m308 Active 8-channel Isolated Direct Box

$1,696.00 Price Tier: High-end

All time low price

All time low price

See more

0 wishlisted

0 saved

Page last updated Jul 05, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated July 4, 2026.

Store

Reviews

Price

$1,995.00 $1,696.00 $299.00 · All time low

$1,696.00

$1,995.00 $1,696.00 $299.00 · All time low

Average Price: $1,696

High-end/Boutique

$119

$300+

Price Tier

In the Direct Boxes category, Grace Design m308 Active 8-channel Isolated Direct Box is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

Price History

Based on price data from 2 merchants for "Grace Design m308 Active 8-channel Isolated Direct Box". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

Unlock the true potential of your sound with the Grace Design m308 Active 8-channel Isolated Direct Box. This powerhouse is not just any DI box; it's a sonic masterpiece engineered for both stage and studio environments. Drawing from the acclaimed circuitry of Grace Design's m303 series, the m308 offers superior performance wrapped in a robust, rack-mountable chassis. Its custom-wound Lundahl transformers deliver unparalleled low-end clarity and high-frequency detail, ensuring every nuance of your performance is captured with precision.

The m308 is built for versatility and reliability, featuring galvanic isolation for low noise and enhanced audio fidelity. Whether you're taming hot signals with its dedicated per-channel 13dB pad switches, or protecting against electrical interference with full ESD/RFI protection, this unit has you covered. An Iso/Gnd switch and peak indicator LED add further layers of control and monitoring, so you can focus on what matters most: your music. The m308's advanced power supply design provides exceptional headroom and dynamic range, making it a must-have for any serious musician or audio engineer.

Key Features:

Active 8-channel rackmount DI box
Full galvanic isolation, powered via standard 48V phantom power
Custom-wound Lundahl transformers for optimal clarity and detail
Superior high-bandwidth design with ultra-low distortion and noise
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

Reviews

Based on 0 Reviews and 0 Ratings

5 star

4 star

3 star

2 star

1 star

More Grace Design Direct Boxes

Grace Design m303 Active Truly Isolated Direct Box Direct Boxes

Grace Design m303 Active Truly Isolated Direct Box

$254.00 - $299.00

6 available stores

Grace Design m303s Active Stereo Isolated Direct Box Direct Boxes

Grace Design m303s Active Stereo Isolated Direct Box

$421.00 - $495.00

4 available stores

Avalon U5 Direct Boxes

Avalon U5

$936.00 - $1,090.00

5 available stores

5.0 (12)

^# 1

in Direct Boxes Rank

Who’s using this:

Billie Joe Armstrong

86 artists using

Radial JDI Direct Boxes

Radial JDI

$220.73 - $269.00

10 available stores

5.0 (11)

^# 2

in Direct Boxes Rank

Who’s using this:

29 artists using

Radial Engineering ProDI Passive Direct Box Direct Boxes

Radial Engineering ProDI Passive Direct Box

$110.36 - $144.00

10 available stores

4.5 (20)

^# 3

in Direct Boxes Rank

Who’s using this:

24 artists using

Radial Engineering ProMS2 Direct Boxes

Radial Engineering ProMS2

$136.11 - $179.00

10 available stores

^# 4

in Direct Boxes Rank

Who’s using this:

Laurie Nankivell

L.R. Baggs Para Acoustic D.I. Direct Boxes

L.R. Baggs Para Acoustic D.I.

$229.00 - $259.00

8 available stores

4.5 (20)

^# 5

in Direct Boxes Rank

Who’s using this:

19 artists using

Radial Engineering JDI Passive Direct Box MK3 Direct Boxes

Radial Engineering JDI Passive Direct Box MK3

$220.73 - $269.00

10 available stores

5.0 (6)

^# 6

in Direct Boxes Rank

Who’s using this:

24 artists using

Radial J48 Direct Box Direct Boxes

Radial J48 Direct Box

$200.00 - $259.99

9 available stores

4.5 (11)

^# 7

in Direct Boxes Rank

Who’s using this:

49 artists using

Radial Engineering ProD2 Stereo Direct Box Direct Boxes

Radial Engineering ProD2 Stereo Direct Box

$183.94 - $222.00

10 available stores

5.0 (7)

^# 8

in Direct Boxes Rank

Who’s using this:

21 artists using

Radial Engineering J48 MK2 48V Phantom Power Active Direct Box Direct Boxes

Radial Engineering J48 MK2 48V Phantom Power Active Direct Box

$225.00 - $259.99

8 available stores

5.0 (12)

^# 9

in Direct Boxes Rank

Who’s using this:

13 artists using

Rupert Neve Designs RNDI Direct Boxes

Rupert Neve Designs RNDI

$199.00 - $399.00

9 available stores

5.0 (8)

^# 10

in Direct Boxes Rank

Who’s using this:

Adam Devonshire

9 artists using

Radial Engineering SGI TX/RX Studio Guitar Interface Direct Boxes

Radial Engineering SGI TX/RX Studio Guitar Interface

$125.00 - $349.99

10 available stores

5.0 (2)

^# 11

in Direct Boxes Rank

Who’s using this:

Billie Joe Armstrong

Josh Klinghoffer

25 artists using

Radial ProRMP Reamp Direct Boxes

Radial ProRMP Reamp

$114.04 - $134.99

10 available stores

4.5 (13)

^# 12

in Direct Boxes Rank

Who’s using this:

6 artists using

BSS Audio AR133 Active DI Box Direct Boxes

BSS Audio AR133 Active DI Box

$115.00 - $232.00

7 available stores

5.0 (3)

^# 13

in Direct Boxes Rank

Who’s using this:

11 artists using

Countryman Type 85 FET Direct Box Direct Boxes

Countryman Type 85 FET Direct Box

$152.15 - $395.00

3 available stores

5.0 (9)

^# 14

in Direct Boxes Rank

Who’s using this:

8 artists using

BSS Audio AR-133 Direct Boxes

BSS Audio AR-133

$105.00 - $232.00

8 available stores

4.5 (5)

^# 15

in Direct Boxes Rank

Who’s using this:

Jonny Greenwood

Colin Greenwood

7 artists using

Universal Audio SOLO/610 Tube Preamp Direct Boxes

Universal Audio SOLO/610 Tube Preamp

$1,069.00 - $1,223.00

10 available stores

4.5 (8)

^# 16

in Direct Boxes Rank

Who’s using this:

Neeraj Khajanchi

5 artists using

Radial Engineering JCR Direct Boxes

Radial Engineering JCR

$220.73 - $275.50

10 available stores

5.0 (4)

^# 17

in Direct Boxes Rank

Who’s using this:

5 artists using

A Designs REDDI Tube Direct Box Direct Boxes

A Designs REDDI Tube Direct Box

$858.83 - $950.00

3 available stores

5.0 (1)

^# 18

in Direct Boxes Rank

Who’s using this:

Chris Wolstenholme

Richard Zven Kruspe

14 artists using

Suhr Reactive Load Direct Boxes

Suhr Reactive Load

$349.00 - $479.00

4 available stores

5.0 (4)

^# 19

in Direct Boxes Rank

Who’s using this:

5 artists using

Radial Pro 48 Direct Boxes

Radial Pro 48

$110.36 - $135.00

9 available stores

4.5 (7)

^# 20

in Direct Boxes Rank

Who’s using this:

4 artists using

Radial X-Amp Active Re-Amplifier Direct Boxes

Radial X-Amp Active Re-Amplifier

$219.00 - $275.50

10 available stores

5.0 (6)

^# 21

in Direct Boxes Rank

Who’s using this:

3 artists using

Radial JDI Duplex Stereo DI Direct Boxes

Radial JDI Duplex Stereo DI

$419.39 - $522.00

8 available stores

5.0 (3)

^# 22

in Direct Boxes Rank

Who’s using this:

3 artists using

Radial StageBug SB-2 Passive Direct Box Direct Boxes

Radial StageBug SB-2 Passive Direct Box

$80.93 - $95.00

9 available stores

5.0 (2)

^# 23

in Direct Boxes Rank

Who’s using this:

Tomasz Wróblewski

Dave Hollingworth

4 artists using

Radial StageBug SB-4 1-channel Active Instrument Direct Box Direct Boxes

Radial StageBug SB-4 1-channel Active Instrument Direct Box

$91.97 - $115.00

9 available stores

^# 24

in Direct Boxes Rank

Tech 21 Sansamp Para Driver DI Direct Boxes

Tech 21 Sansamp Para Driver DI

$209.00 - $269.00

3 available stores

4.5 (5)

^# 25

in Direct Boxes Rank

Who’s using this:

13 artists using

Whirlwind IMP 2 Unbalanced to Balanced Audio Converter Direct Boxes

Whirlwind IMP 2 Unbalanced to Balanced Audio Converter

$77.99 - $98.00

7 available stores

5.0 (1)

^# 26

in Direct Boxes Rank

Who’s using this:

4 artists using

Radial StageBug SB-1 Active DI Direct Boxes

Radial StageBug SB-1 Active DI

$80.93 - $95.00

8 available stores

5.0 (2)

^# 27

in Direct Boxes Rank

Who’s using this:

Maarten Devoldere

3 artists using

Walrus Audio Canvas Stereo Direct Injection Box Direct Boxes

Walrus Audio Canvas Stereo Direct Injection Box

$222.00 - $249.99

7 available stores

5.0 (2)

^# 28

in Direct Boxes Rank

Who’s using this:

Manuel Cabezalí

2 artists using

Palmer PAN 01 Passive DI Box Direct Boxes

Palmer PAN 01 Passive DI Box

$40.10 - $129.99

5 available stores

5.0 (1)

^# 29

in Direct Boxes Rank

Who’s using this:

Cristian Aroca Araya

3 artists using

Radial Engineering JDX 48 Guitar Amplifier Direct Box Direct Boxes

Radial Engineering JDX 48 Guitar Amplifier Direct Box

$228.09 - $271.00

8 available stores

5.0 (2)

^# 30

in Direct Boxes Rank

Who’s using this:

Stephen Egerton

4 artists using

Rupert Neve Designs Portico 5017 Mobile DI Mic Preamp Compressor Direct Boxes

Rupert Neve Designs Portico 5017 Mobile DI Mic Preamp Compressor

$1,249.00 - $1,499.00

9 available stores

4.5 (2)

^# 31

in Direct Boxes Rank

Who’s using this:

Marcello Tahitoe

3 artists using

Acme Audio Motown D.I. WB-3 Direct Boxes

Acme Audio Motown D.I. WB-3

$429.00 - $449.00

4 available stores

5.0 (1)

^# 32

in Direct Boxes Rank

Who’s using this:

6 artists using

Radial Engineering JDX Reactor Guitar Amp and Cabinet Direct Box Direct Boxes

Radial Engineering JDX Reactor Guitar Amp and Cabinet Direct Box

$249.99

1 available store

5.0 (3)

^# 33

in Direct Boxes Rank

Who’s using this:

20 artists using

Hughes & Kettner Red Box 5 DI and Speaker Simulator Direct Boxes

Hughes & Kettner Red Box 5 DI and Speaker Simulator

$48.00 - $149.00

7 available stores

4.5 (5)

^# 34

in Direct Boxes Rank

Who’s using this:

2 artists using

Radial EXTC-SA Effects Reamper Direct Boxes

Radial EXTC-SA Effects Reamper

$333.00 - $384.00

9 available stores

5.0 (1)

^# 35

in Direct Boxes Rank

Who’s using this:

Anthony Marinelli

3 artists using

Passive Di direct box 1/4" instrument to balanced & unbalanced XLR Direct Boxes

Passive Di direct box 1/4" instrument to balanced & unbalanced XLR

$20.00 - $69.99

5 available stores

5.0 (2)

^# 36

in Direct Boxes Rank

Who’s using this:

Radial Engineering J48 Stereo Direct Boxes

Radial Engineering J48 Stereo

$345.81 - $399.99

9 available stores

5.0 (1)

^# 37

in Direct Boxes Rank

Who’s using this:

Brendan Bayliss

3 artists using

Boss DI-1 Direct Box Direct Boxes

Boss DI-1 Direct Box

$89.60 - $188.43

3 available stores

4.0 (3)

^# 38

in Direct Boxes Rank

Who’s using this:

2 artists using

See also: Direct Boxes, Grace Design, Grace Design Direct Boxes, High-end Direct Boxes

Accessories & Related Items

Rupert Neve Designs RNDI-8 8-channel Active Direct Box

Rupert Neve Designs RNDI-8 8-channel Active Direct Box

Radial Pro D8

Walrus Audio Mantle Analog Bass Preamp/DI Pedal

Walrus Audio Mantle Analog Bass Preamp/DI Pedal

Radial Engineering JD7 Injector Guitar Signal Distribution System

Radial Engineering JD7 Injector Guitar Signal Distribution System

Artist usage

Add artist usage

Community setups

Similar

Add recommendation

Gear Guides

Best DI Boxes: A Direct Gear Guides

Equipboard Gear Guides

Best DI Boxes: A Direct Gear Guides

Mason Hoberg

Giulio Chiarenza

Mason Hoberg + 1 more

Updated September 2025

6 Best Multi-Track Recorders: Digital vs Analog Options 2025

Equipboard Gear Guides

6 Best Multi-Track Recorders: Digital vs Analog Options 2025

S. Jino

S. Jino

Updated March 2025

Best Music Samplers 2026: Top Picks for Every Budget & Style

Equipboard Gear Guides

Best Music Samplers 2026: Top Picks for Every Budget & Style

Juan Spinelli

Juan Spinelli

Updated December 2024

Top 7 Sequencers for Music Production in 2026

Equipboard Gear Guides

Top 7 Sequencers for Music Production in 2026

S. Jino

S. Jino

Updated May 2025

Most Popular Direct Boxes

Added to Equipboard on 02-01-2026 by

equipboard

Gear IQ 4934