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 7 AM – 6 PM PT

SUN 8 AM – 5 PM PT

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

Your Cart Is Empty

Sign In < Continue Shopping
Why Shop With Us?
 Guitar Fest! Shop deals & special financing. Call 888-688-0208 or chat for more deals! Guitar Fest! Deals & special financing
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

(265 Items)

  • Direct Boxes

    Direct Boxes

  • Equalizers

    Equalizers

  • Compressors & Limiters

    Compressors & Limiters

  • 500 Series Gear

    500 Series Gear
Livewire SPDI Passive Direct Box With Attenuation Pad
Livewire SPDI Passive Direct Box With Attenuation Pad
4.5 of 5 stars (54)
Product Price  $39.99
Rupert Neve Designs Shelford Channel
Rupert Neve Designs Shelford Channel
5.0 of 5 stars (1)
Product Price  $3,999.00
Rupert Neve Designs Portico II Master Buss Processor
Rupert Neve Designs Portico II Master Buss Processor
0 of 5 stars
Product Price  $5,299.00
Sale
Summit Audio DCL-200 Dual-Channel Compressor/Limiter
Summit Audio DCL-200 Dual-Channel Compressor/Limiter
0 of 5 stars
Product Price  $3,299.99
$4,749.99
Rupert Neve Designs Portico 542 500 Series Tape FX
Rupert Neve Designs Portico 542 500 Series Tape FX
0 of 5 stars
Product Price  $999.00
Radial Engineering ProD2 Passive Stereo Direct Box
Radial Engineering ProD2 Passive Stereo Direct Box
5.0 of 5 stars (9)
Product Price  $209.99
Radial Engineering ProDI Passive Direct Box
Radial Engineering ProDI Passive Direct Box
5.0 of 5 stars (22)
Product Price  $134.99
Neve 1073OPX 8-Channel Microphone Preamp With Remote Control & USB/Dante Option Card
Neve 1073OPX 8-Channel Microphone Preamp With Remote...
0 of 5 stars
Product Price  $4,995.00
48-Month Financing*
Warm Audio WA76-A2 Dual-Channel Vintage-Voiced Discrete FET Compressor
Warm Audio WA76-A2 Dual-Channel Vintage-Voiced Discrete FET...
0 of 5 stars
Product Price  $1,299.00
Or $28/month^ with 48 month
financing* Limited Time. Details
TC Helicon Play Acoustic Vocal and Guitar Effects Pedal
TC Helicon Play Acoustic Vocal and Guitar Effects Pedal
4.0 of 5 stars (32)
Product Price  $289.00
Rupert Neve Designs RNDI-M Active Transformer Direct Box
Rupert Neve Designs RNDI-M Active Transformer Direct Box
5.0 of 5 stars (1)
Product Price  $199.00
48-Month Financing*
Warm Audio WA73-EQ One-Channel British Mic Pre & EQ
Warm Audio WA73-EQ One-Channel British Mic Pre & EQ
5.0 of 5 stars (3)
Product Price  $899.00
Or $19/month^ with 48 month
financing* Limited Time. Details
Cloud Cloudlifter CL-1 Mic Activator
Cloud Cloudlifter CL-1 Mic Activator
5.0 of 5 stars (16)
Product Price  $125.00
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  $134.99
Rupert Neve Designs Newton Channel Strip With Mic Pre + EQ + Compressor With Silk
Rupert Neve Designs Newton Channel Strip With Mic Pre + EQ...
5.0 of 5 stars (2)
Product Price  $1,999.00
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
Radial Engineering J48 Phantom Powered Active Direct Box
Radial Engineering J48 Phantom Powered Active Direct Box
4.0 of 5 stars (7)
Product Price  $259.99
Art Tube MP Studio V3 Microphone Preamp
Art Tube MP Studio V3 Microphone Preamp
0 of 5 stars
Product Price  $183.00
(1) Open Box:
$161.04
TC Helicon VoiceTone Single H1 Intelligent Harmony Effects Pedal
TC Helicon VoiceTone Single H1 Intelligent Harmony Effects...
4.5 of 5 stars (66)
Product Price  $139.00
48-Month Financing*
Warm Audio WA-MPX Single-Channel Tube Mic Preamp
Warm Audio WA-MPX Single-Channel Tube Mic Preamp
0 of 5 stars
Product Price  $799.00
Or $17/month^ with 48 month
financing* Limited Time. Details
Livewire PDI Double-Shielded Heavy-Duty Passive Direct Box
Livewire PDI Double-Shielded Heavy-Duty Passive Direct Box
4.5 of 5 stars (26)
Product Price  $49.99
Rupert Neve Designs R10 10-Slot 500 Series Chassis
Rupert Neve Designs R10 10-Slot 500 Series Chassis
0 of 5 stars
Product Price  $999.00
Price Drop
Warm Audio WA-2MPX Dual-Channel Tube Mic Preamp
Warm Audio WA-2MPX Dual-Channel Tube Mic Preamp
0 of 5 stars
Product Price  $1,399.00
$1,499.00
Or $30/month^ with 48 month
financing* Limited Time. Details
TC Helicon PERFORM-V Vocal Effects Processor
TC Helicon PERFORM-V Vocal Effects Processor
4.0 of 5 stars (5)
Product Price  $209.00
Neve 88C Dual Desktop Dynamics USB-C Compressor/Limiter
Neve 88C Dual Desktop Dynamics USB-C Compressor/Limiter
0 of 5 stars
Product Price  $1,195.00
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  $989.99
Or $21/month^ with 48 month
financing* Limited Time. Details
Art dPDB Dual Passive Direct Box
Art dPDB Dual Passive Direct Box
0 of 5 stars
Product Price  $65.99
48-Month Financing*
Warm Audio WA76-A Single-Channel Vintage-Voiced Discrete FET Compressor
Warm Audio WA76-A Single-Channel Vintage-Voiced Discrete...
0 of 5 stars
Product Price  $799.00
Or $17/month^ with 48 month
financing* Limited Time. Details
48-Month Financing*
Warm Audio WA76-D Single-Channel Clean Gain Discrete FET Compressor
Warm Audio WA76-D Single-Channel Clean Gain Discrete FET...
0 of 5 stars
Product Price  $799.00
Or $17/month^ with 48 month
financing* Limited Time. Details
Death by Audio Echo Master Lo-Fi Vocal Delay/Preamp Effects Pedal
Death by Audio Echo Master Lo-Fi Vocal Delay/Preamp Effects...
0 of 5 stars
Product Price  $300.00
48-Month Financing*
Warm Audio EQP-WA Tube EQ
Warm Audio EQP-WA Tube EQ
4.0 of 5 stars (5)
Product Price  $799.00
Or $17/month^ with 48 month
financing* Limited Time. Details
(1) Open Box:
$703.12
Whirlwind IMP 2 Standard Direct Box
Whirlwind IMP 2 Standard Direct Box
5.0 of 5 stars (27)
Product Price  $94.00
Radial Engineering Pro RMP Passive Reamping Direct Box
Radial Engineering Pro RMP Passive Reamping Direct Box
5.0 of 5 stars (4)
Product Price  $134.99
Mackie MDB-2P Stereo Passive Direct Box
Mackie MDB-2P Stereo Passive Direct Box
5.0 of 5 stars (2)
Product Price  $89.99
Art PDB4 Passive Direct Box
Art PDB4 Passive Direct Box
4.5 of 5 stars (2)
Product Price  $144.99
Radial Engineering Highline Stereo Passive Line Isolator
Radial Engineering Highline Stereo Passive Line Isolator
0 of 5 stars
Product Price  $249.99
Mackie MTest-1 Cable Tester
Mackie MTest-1 Cable Tester
5.0 of 5 stars (4)
Product Price  $39.99
48-Month Financing*
Warm Audio WA76-D2 Dual Channel Clean Gain Discrete FET Compressor
Warm Audio WA76-D2 Dual Channel Clean Gain Discrete FET...
0 of 5 stars
Product Price  $1,299.00
Or $28/month^ with 48 month
financing* Limited Time. Details
Art Tube MP Professional Mic Preamp/Processor
Art Tube MP Professional Mic Preamp/Processor
4.0 of 5 stars (33)
Product Price  $129.99
Radial Engineering ProAV2 Stereo Direct Box
Radial Engineering ProAV2 Stereo Direct Box
4.5 of 5 stars (3)
Product Price  $229.99
Warm Audio Warm Lifter Inline Active Microphone Preamp
Warm Audio Warm Lifter Inline Active Microphone Preamp
0 of 5 stars
Product Price  $149.00
Radial Engineering JDI Stereo Passive Direct Box
Radial Engineering JDI Stereo Passive Direct Box
5.0 of 5 stars (1)
Product Price  $399.99
Radial Engineering PRO ISO Stereo Line Isolator +4dB to -10dB with Radial Transformer
Radial Engineering PRO ISO Stereo Line Isolator +4dB to...
0 of 5 stars
Product Price  $209.99
TC Helicon VoiceTone Single C1 HardTune & Correction Effects Pedal
TC Helicon VoiceTone Single C1 HardTune & Correction...
4.5 of 5 stars (30)
Product Price  $147.49
(1) Open Box:
$129.79
Cloud Cloudlifter-Z Microphone Activator
Cloud Cloudlifter-Z Microphone Activator
5.0 of 5 stars (3)
Product Price  $249.00
(1) Open Box:
$219.12
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  $364.99
Rapco Horizon RFBLOX RF Choke Device
Rapco Horizon RFBLOX RF Choke Device
5.0 of 5 stars (1)
Product Price  $49.99
Warm Audio WA12 MKII Mic Pre Black
Warm Audio WA12 MKII Mic Pre Black
0 of 5 stars
Product Price  $449.00
Art S8-3Way Eight-Channel Three-Way Mic Splitter
Art S8-3Way Eight-Channel Three-Way Mic Splitter
3.5 of 5 stars (3)
Product Price  $419.99
Radial Engineering StageBug SB-6 Passive Stereo Line Isolator
Radial Engineering StageBug SB-6 Passive Stereo Line...
0 of 5 stars
Product Price  $159.99
Rapco Horizon STL-1 Stereo Line Direct Box
Rapco Horizon STL-1 Stereo Line Direct Box
5.0 of 5 stars (7)
Product Price  $96.95
Art Dual Transformer/Isolator Hum Eliminator
Art Dual Transformer/Isolator Hum Eliminator
5.0 of 5 stars (3)
Product Price  $99.99
(1) Open Box:
$87.99
Radial Engineering ProAV1 Single-Channel Direct Box
Radial Engineering ProAV1 Single-Channel Direct Box
5.0 of 5 stars (4)
Product Price  $154.99
Radial Engineering HotShot DM1 Microphone Signal Muting Footswitch
Radial Engineering HotShot DM1 Microphone Signal Muting...
4.0 of 5 stars (4)
Product Price  $154.99
Radial Engineering Catapult Mini TRS 4-Channel Analog Cat 5 Audio Snake
Radial Engineering Catapult Mini TRS 4-Channel Analog Cat 5...
0 of 5 stars
Product Price  $124.99
Rolls MP13 Mini-Mic Preamp
Rolls MP13 Mini-Mic Preamp
5.0 of 5 stars (7)
Product Price  $89.00
Radial Engineering PZ-DI Acoustic/Orchestral Instrument Active Direct Box
Radial Engineering PZ-DI Acoustic/Orchestral Instrument...
0 of 5 stars
Product Price  $299.99
Galaxy Audio CM-130 Check Mate SPL Meter
Galaxy Audio CM-130 Check Mate SPL Meter
5.0 of 5 stars (5)
Product Price  $89.99
Radial Engineering JPC Stereo PC DI Box
Radial Engineering JPC Stereo PC DI Box
5.0 of 5 stars (3)
Product Price  $259.99
Rapco Horizon DBBLOX Hi to Lo Z Transformer Direct Box
Rapco Horizon DBBLOX Hi to Lo Z Transformer Direct Box
4.5 of 5 stars (4)
Product Price  $26.99