Cornell Plexi Pro 18/20 Head Amplifier

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£1,195.00 (including VAT @ 20%)

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Estimated delivery to you: 30th December 2016
FREE Delivery available.

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1 year warranty and 30 day money back guarantee included

1 year warranty and 30 day money back guarantee included

Once the product is delivered, you have 30 days to decide that you definitely want to keep it. If you decide it is not suitable for any reason, you can return it back to us for replacement or full refund, including standard delivery charges.

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Product Ref: 81882

  • Made to the Basic Circuit of the PA20 Plexi Panel from the 60s
  • 2 Channels with Hi/Lo inputs, Volume and Tone Control
  • Delivers a of 'Plexi' Tones Perfect for Playing Rock Music
  • Switchable Valve Rectification with Cornell-Cream Box
  • Output 20 Watts Switchable Down to 5 Watts

Cornell Plexi Pro 18/20 Head Amplifier

The Cornell Plexi Pro 18/20 Head Amplifier is manufactured to the same basic circuit of the PA20 Plexi panel which was produced in the 60s and delivers a full range of 'Plexi' tones which are perfect for guitarists seeking a classic rock tone. This portable amp head features two independent channels, both with Hi/Lo inputs, Volume and Tone control. Other features include a 20 watt output which is switchable down to 5 watts depending on your requirements, and a Cornell-Cream Box for a smooth sound. The 18/20 head is constructed from plywood, covered in green Tolex and features a carry handle for portable use.

Product Ref: 81882

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Buy on finance from £32.77 per month Finance from £32.77 per month  

  • 15.9%
  • £41.50
  • £1,494.00
Pay by Finance

To make it as easy as possible for you to get the gear you want, we offer a range of instant finance options. If you spend £250 or more online, you can choose to pay over 48, 36 or 24 months. The majority of decisions are given instantly, so you could get your new gear sooner than you thought!

Representative Example

To help you understand how our finance options work, the examples below are based on a total order value of £250:

Finance APR Deposit to Pay Payments Total Payable
Classic Credit 48 Months 14.9% 14.9% No Deposit 48 months: £6.83
Final payment: £6.83
No settlement fee
Classic Credit 36 Months 15.9% 15.9% No Deposit 36 months: £8.65
Final payment: £8.65
No settlement fee
Classic Credit 24 Months 18.9% 18.9% No Deposit 24 months: £12.41
Final payment: £12.41
No settlement fee

How to Apply

Applying for finance couldn't be easier - if your order totals £250 or more, simply proceed through the checkout as normal, then select Pay by Finance on the payment page, then click the orange APPLY FOR INSTANT FINANCE button. This will start your application with V12 Retail Finance, our finance partner, and completing this form should take approximately 10 minutes.

You should get an instant answer on whether your application has been successful, though in some rare cases V12 may need to look at the application in more detail.

Please note: This is only available on orders placed via the website and is not available in store or via phone currently.

Full Description

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An Iconic Rock Tone For the Modern Player

Plexi is the legendary nickname for the range of amplifiers produced in the mid 1960s, delivering a classic rock tone that has been popular ever since. The Cornell Plexi Pro 18/20 Head Amplifier recreates this iconic tone by incorporating a full host of high quality components and circuitry. Whether you are in a rock band, or simply want to achieve that definitive sound, the Cornell range of Plexi amplifiers is the perfect choice for any guitarist.

A Unique Construction

Although the Cornell Plexi Pro 18/20 Head Amplifier takes its inspiration from these original Plexi amps, it also features modern improvements that reproduces this classic sound for the modern player. Cornell amplifiers are designed to avoid frequency loss caused by printed circuits, by incorporating point-to-point wiring throughout. Each feature is hand-mounted onto a component board which is sealed using a conformal coating to prevent noise and the reduction of component life caused by moisture penetration. Highly trained staff take time in hand-wiring each component, to ensure the highest standards of reliability and sound. A stainless steel chassis accommodates the specially-designed transformers, and chassis mounted valves, providing you with a durable unit.

Dual Channels

Like others from the Cornell range, the Plexi Pro 18/20 Head Amplifier is equipped with two independent channels, each having its own volume control which controls the overall loudness of the amp. The tone controls are designed to work over the entire frequency range of your guitar, allowing increased amounts of low and high frequency adjustment. Channel Two has a brighter tone than that of that of Channel One, and is ideal for playing solos or isolated guitar riffs. As well as dual channels the Plexi Pro is also equipped with an 18/20 switch which changes the rectifier from valve (18) to semiconductor (20). The valve rectifier gives a bluesy ‘sag’ in output, while the semiconductor rectifier has a faster response and less sag, improving transient attack. The Plexi Pro 18/20 Head Amplifier is made to ensure a very close reproduction of the full harmonic spectrum of your guitar’s pickups, resulting in a true, natural sound that will stand out in any application.


  • Made to the basic circuit of the PA20 Plexi panel which was produced in the 60s.
  • Two independent channels ,both with Hi/Lo inputs, Volume and Tone control
  • Delivers a full range of 'Plexi' tones which are perfect for playing rock music
  • Switchable valve rectification
  • Output 20 watts switchable down to 5 watts
  • Cornell-Cream Box offers a smooth sound
  • Plywood housing covered in green Tolex covering
  • Art Deco 'Cornell' Logo
  • Ergonomic carry handle for portable use


  • Valve Complement: ECC83 x2, EL84 x2, GZ34 x1
  • Input Impedance: Hi - 2.2 MegOhm: Lo - 94 kOhm
  • Channel 1 Controls: Volume & Tone (With Hi & Lo inputs)
  • Channel 2 Controls: Volume & Tone (With Hi & Lo inputs)
  • Output: High: 18/20 Watts, Low: 4.5/5 Watts
  • Cabinet: Plywood & plywood baffle. Green covering


  • Height: 7.75"
  • Width: 19"
  • Depth: 8.5"
  • Weight: 10kg