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MXR Custom Audio Electronics MC401 Boost/Line Driver



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Product Description

The MC401 Boost/Line Driver from MXR is a potent volume pusher, taking your guitar's signal up by a significant notch! With up to 20dB of boost on tap, this powerful pedal raises the overall output of your rig, serving as the perfect driver for solos.

However, it's not just a one-trick-pony. While it may only boast one control, the MC401 also adds some crisp top-end to your tone as well as more mid-range punch. This offers a sound with far more definition and brilliance, which can help to compensate for the signal loss caused by large and complex rigs.

Place this pedal in your effects loop and you'll achieve a pure, unbridled kick of extra volume. However, this unit can also shine when used in conjunction with overdrive or distortion pedals, and when placed before them you can achieve a more saturated and harmonically-rich tone. Whichever way you decide to route the MC401, you'll always find it useful!


  • Input Impedance: 1 kΩ
  • Output Impedance: 150 Ω
  • Nominal Input: -22 dBV
  • Output Level: -22 dBV
  • Boost Gain Range: 20 dB
  • Noise Floor: >95 dB
  • Bypass: True Hardwire
  • Current Draw: 1.5 mA
  • Power Supply: 9 volts DC
  • Dimensions: 5.8" x 4.8" x 3"
Elliot Stent author picture

Written by Elliot Stent

Customer Reviews


4 reviews





Mr Mike Willoughby29th Jan 2023

The MC401 gives me exactly what I've been looking for, a completely clean lead boost after my overdrive pedals to raise the overall volume without changing the tone of the overdrives. This pedal does exactly that, and punches out the solo notes really clearly without adding any compression or colouration at all. Lots of volume on tap. Typical MXR, gets the job done with a minimum of clutter and fuss. Looks great too, and obviously well made. Brilliant!

Value 5Looks 5Durability 5Sound 5

Trusted Customer25th Aug 2021

Value 5Looks 4Sound 5

Mr Thomas Schlueter9th Dec 2019

Very good clean boost, rock-solid build, fits well into pedalboard.

Value 5Looks 5Durability 5Sound 5

Trusted Customer8th Jul 2019

Does what it says on the tin. Clean boost for solos for my Marshall JCM 800 Studio by putting it thru the Effects Loop. No tone coloration at all.

Finance available at checkout for orders £300+

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It's simple! Just add the products you want to your basket and click the "Checkout" button in your basket. Go through the checkout process and tick the "Finance" option under "Select Your Payment Method". You can then choose which finance term you'd like to apply for, and change your deposit if you wish.

At the end of the checkout you'll be taken to the V12 Finance web site. This is where your finance application is processed. Assuming your application is accepted you'll be able to place your deposit and confirm your order right there.

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.