Why Shop With Us?

Free Shipping

Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).

Orders placed before 3 p.m. ET usually ship the same business day.

Learn More

2-Year Free Warranty on Guitars

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

Contact Us for Details

We're Here for You

Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.

Contact Us

Contact Us

Call Now
800-449-9128

Hablamos Español

866.226.2919

Let's Chat
Live Chat

Hours:

MON - FRI 6 AM – 7 PM PT

SAT 6 AM – 6 PM PT

SUN 8 AM – 5 PM PT

Holiday Hours:

Christmas Eve Hours: 6 AM PT – 3 PM PT

Christmas Day: Closed

New Year’s Eve: 6 AM PT – 4 PM PT

New Year’s Day: Closed

Track your order Returns FAQs Make a Card Payment
Empty Cart Icon

Your Cart Is Empty

Sign In < Continue Shopping
Why Shop With Us?
 Winter Clearance Sale - Up to 50% off select gear. Call 888-688-0208 or chat for the best deals Winter Clearance Sale - Up to 50% off select gear
RewardsBlogHelp

Contact Us

800-449-9128
Cart
Back
Shop by Category
Hot Deals

Help | Call or Chat

 Track your orderReturnsFAQsMake a card paymentWhy shop with us? RewardsBlogHelp
Home Pro Audio Signal Processors

Signal Processors

(185 Items)

  • Direct Boxes

    Direct Boxes

  • Equalizers

    Equalizers

  • Compressors & Limiters

    Compressors & Limiters

  • 500 Series Gear

    500 Series Gear
Clear All
Behringer ULTRAGRAPH PRO FBQ1502HD 2-Channel 15-Band Graphic EQ
Behringer ULTRAGRAPH PRO FBQ1502HD 2-Channel 15-Band...
4.5 of 5 stars (6)
Product Price  $109.00
48-Month Financing*
Focusrite ISA One Classic Single-Channel Mic Pre
Focusrite ISA One Classic Single-Channel Mic Pre
4.5 of 5 stars (15)
Product Price  $599.99
Or $12.50/month^ with 48 month
financing* Limited Time. Details
Radial Engineering ProAV2 Stereo Direct Box
Radial Engineering ProAV2 Stereo Direct Box
4.5 of 5 stars (3)
Product Price  $219.99
(1) Open Box:
$193.59
48-Month Financing*
Warm Audio WA-412 - Classic 4-Channel Mic Pre
Warm Audio WA-412 - Classic 4-Channel Mic Pre
5.0 of 5 stars (3)
Product Price  $1,299.00
Or $27.07/month^ with 48 month
financing* Limited Time. Details
Art P16 16-Channel XLR Balanced Patch Bay
Art P16 16-Channel XLR Balanced Patch Bay
5.0 of 5 stars (1)
Product Price  $99.99
48-Month Financing*
Universal Audio 710 Twin-Finity Mic Pre & DI Box
Universal Audio 710 Twin-Finity Mic Pre & DI Box
4.5 of 5 stars (5)
Product Price  $999.00
Or $20.82/month^ with 48 month
financing* Limited Time. Details
(1) Open Box:
$879.12
Radial Engineering HotShot DM1 Microphone Signal Muting Footswitch
Radial Engineering HotShot DM1 Microphone Signal Muting...
4.0 of 5 stars (4)
Product Price  $149.99
PreSonus Studio Channel Tube Channel Strip
PreSonus Studio Channel Tube Channel Strip
4.5 of 5 stars (21)
Product Price  $359.99
(1) Open Box:
$287.99
Roland VT-4 Voice Transformer
Roland VT-4 Voice Transformer
5.0 of 5 stars (1)
Product Price  $249.99
Behringer PX3000 Ultrapatch Pro Patchbay
Behringer PX3000 Ultrapatch Pro Patchbay
4.0 of 5 stars (12)
Product Price  $59.00
(1) Open Box:
$51.92
Radial Engineering BT-Pro V2 Stereo Bluetooth Direct Box
Radial Engineering BT-Pro V2 Stereo Bluetooth Direct Box
5.0 of 5 stars (1)
Product Price  $349.99
48-Month Financing*
Warm Audio WA-2A Tube Opto Compressor
Warm Audio WA-2A Tube Opto Compressor
5.0 of 5 stars (1)
Product Price  $949.00
Or $19.78/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
Warm Audio WA73-EQ 1-Channel British Mic Pre & EQ
Warm Audio WA73-EQ 1-Channel British Mic Pre & EQ
5.0 of 5 stars (3)
Product Price  $799.00
Or $16.65/month^ with 48 month
financing* Limited Time. Details
dbx 223xs Stereo 2-Way/Mono 3-Way Crossover
dbx 223xs Stereo 2-Way/Mono 3-Way Crossover
4.5 of 5 stars (8)
Product Price  $259.00
(2) Open Box: from
$207.20
10% Off $199+ W/ winter
Rapco Horizon CVPBLOX Variable Pad Microphone Volume Control
Rapco Horizon CVPBLOX Variable Pad Microphone Volume...
4.0 of 5 stars (7)
Product Price  $59.99
Radial Engineering SGI TX/RX Studio Guitar Interface
Radial Engineering SGI TX/RX Studio Guitar Interface
4.5 of 5 stars (3)
Product Price  $329.99
48-Month Financing*
Art Voice Channel Tube Mic Preamp
Art Voice Channel Tube Mic Preamp
5.0 of 5 stars (5)
Product Price  $619.99
Or $12.92/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
Focusrite Scarlett OctoPre Dynamic 8-Channel Microphone Preamp & Compressor
Focusrite Scarlett OctoPre Dynamic 8-Channel Microphone...
5.0 of 5 stars (1)
Product Price  $699.99
Or $14.59/month^ with 48 month
financing* Limited Time. Details
10% Off $199+ W/ winter
Livewire ADI Active DI Direct Box
Livewire ADI Active DI Direct Box
4.0 of 5 stars (4)
Product Price  $62.99
48-Month Financing*
dbx DriveRack 260 Complete Equalization and Loudspeaker Control System
dbx DriveRack 260 Complete Equalization and Loudspeaker...
5.0 of 5 stars (3)
Product Price  $825.00
Or $17.19/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
Rupert Neve Designs Portico 511 500-Series Mic Preamp with Texture Control
Rupert Neve Designs Portico 511 500-Series Mic Preamp with...
5.0 of 5 stars (2)
Product Price  $749.00
Or $15.61/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
dbx iEQ-31 Graphic EQ
dbx iEQ-31 Graphic EQ
4.5 of 5 stars (3)
Product Price  $1,309.00
Or $27.28/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
Art Digital MPA-II 2-Channel Tube Microphone Preamp with A/D Conversion
Art Digital MPA-II 2-Channel Tube Microphone Preamp with...
5.0 of 5 stars (7)
Product Price  $599.99
Or $12.50/month^ with 48 month
financing* Limited Time. Details
Radial Engineering JDI MK3 Passive Direct Box
Radial Engineering JDI MK3 Passive Direct Box
5.0 of 5 stars (10)
Product Price  $249.99
Radial Engineering J48 Phantom Powered Active Direct Box
Radial Engineering J48 Phantom Powered Active Direct Box
4.0 of 5 stars (7)
Product Price  $249.99
Behringer CT100 6-in-1 Cable Tester
Behringer CT100 6-in-1 Cable Tester
4.5 of 5 stars (35)
Product Price  $21.90
48-Month Financing*
Solid State Logic UltraViolet EQ 500 Series Stereo EQ
Solid State Logic UltraViolet EQ 500 Series Stereo EQ
5.0 of 5 stars (2)
Product Price  $549.99
Or $11.46/month^ with 48 month
financing* Limited Time. Details
dbx 215s Dual-Channel 15-Band Graphic Equalizer
dbx 215s Dual-Channel 15-Band Graphic Equalizer
4.5 of 5 stars (10)
Product Price  $239.00
(1) Open Box:
$210.32
Radial Engineering Catapult Mini RX 4-Channel Cat 5 Audio Snake
Radial Engineering Catapult Mini RX 4-Channel Cat 5 Audio...
5.0 of 5 stars (1)
Product Price  $119.99
10% Off $199+ W/ winter
ProCo Panic Button Mic A/B Box
ProCo Panic Button Mic A/B Box
4.0 of 5 stars (5)
Product Price  $146.99
Behringer ULTRA-DI DI400P Passive Direct Box
Behringer ULTRA-DI DI400P Passive Direct Box
4.5 of 5 stars (23)
Product Price  $21.90
Radial Engineering Pro48 Active 48-Volt Compact Active Direct Box
Radial Engineering Pro48 Active 48-Volt Compact Active...
5.0 of 5 stars (6)
Product Price  $129.99
10% Off $199+ W/ winter
Cloud Cloudlifter CL-2 Phantom powered gain booster for dynamic and ribbon mics
Cloud Cloudlifter CL-2 Phantom powered gain booster for...
5.0 of 5 stars (8)
Product Price  $249.00
dbx Di1 Active Direct Box
dbx Di1 Active Direct Box
5.0 of 5 stars (1)
Product Price  $149.00
Solid State Logic SiX Channel 500 Series Mini Channel Strip
Solid State Logic SiX Channel 500 Series Mini Channel Strip
5.0 of 5 stars (2)
Product Price  $399.99
Art ProMPA II - 2-Channel Tube Mic Preamp
Art ProMPA II - 2-Channel Tube Mic Preamp
4.0 of 5 stars (17)
Product Price  $449.00
Radial Engineering ProAV1 Single-Channel Direct Box
Radial Engineering ProAV1 Single-Channel Direct Box
5.0 of 5 stars (4)
Product Price  $149.99
Radial Engineering Radial Workhorse Cube Desktop Power Rack
Radial Engineering Radial Workhorse Cube Desktop Power Rack
4.0 of 5 stars (1)
Product Price  $399.99
PreSonus BlueTube DP V2 2-Channel Mic/Instrument Tube Preamp
PreSonus BlueTube DP V2 2-Channel Mic/Instrument Tube...
4.0 of 5 stars (4)
Product Price  $254.99
(1) Open Box:
$224.39
Radial Engineering J48 Stereo Active Direct Box
Radial Engineering J48 Stereo Active Direct Box
5.0 of 5 stars (1)
Product Price  $379.99