NewCastle 30 MKII



The original NewCastle 30 has been our best selling amplifier to date and is a simple but flexible tone machine and today we are very pleased to announce the release of the updated NewCastle 30, the NewCastle 30 MKII!!

The NewCastle MKII builds upon the NewCastle 30 by adding the BODY control that we developed for the original McFly! We’ve added this feature to a couple of NewCastle 30’s over the years and this mod made a great amp even better! We also performed two “clean” mods that people have requested over the years that give extended clean headroom and dynamic response!

To make the NewCastle MKII even better….we are dropping the price by $400! The original NewCastle 30 sold for $2195 and even with the new improvements we are dropping the price of the MKII version to $1795!

Keep reading below to learn more about the NewCastle 30 and see videos of it in action!

Available in a head or combo configuration. Black and Ivory, Hot Scarlett and Ivory and Vox Fawn and Ivory are standard colors. Call for quote for all other colors.

This item cannot be purchased online. Please contact us directly if you're interested in ordering an amplifier or cabinet.

Demo Videos


At the urging of several customers of the original NewCastle 30 for more clean head room from the amp, we developed a couple of mods that we refer to as the “clean” mods. Essentially those two mods involve modifying the gain of both preamps and modifying the power supply to allow for more clean headroom and global dynamic response.

One other noteworthy change that is different from the original NewCastle 30 is that we are dropping the price of the NewCastle 30 MKII by $400.00! In years past we have had to keep the prices of our amplifiers higher than I would have preferred in order to stay in business. However with the recent success of our new pedal company, Jackson Audio, we have been able to spread our overhead out of over two companies and this has allowed us to lower the prices on our amplifiers by 20% on average. This “new” price is actually our old price that we had in place when the NewCastle 30 was first released.

We hope that the new features of the NewCastle 30 MKII along with the price DECREASE shows our commitment to bringing our players the best value and products for their money!

Perfect Tone. Simplified.

Like the original NewCastle, the NewCastle 30 MKII is a simple tone machine that will cover everything from pristine British clean to straight up Rock and everywhere in between. The clean tones are rich and full of authority with sparkling highs that never become brittle or piercing. The low end was specifically designed to remain tight and punchy even when cranked so you’ll never lose definition when playing at loud volumes. The NewCastle 30 MKII adds to the NewCastle’s tone with increased headroom and low end punch and clarity. Tonally the NewCastle 30 MKII has an English heritage but is cleaner and more robust than many EL84 based amps. The NewCastle 30 MKII is perfect for the player that uses a lot of pedals and wants an affordable clean platform to work from. In fact the NewCastle 30 MKII remains clean up till around 2:00 on the Volume control and from there breaks up into the most musical overdrive you have ever heard! One of the best features of the NewCastle 30 MKII is how well it cleans up when you roll the volume on your guitar down. With the NewCastle 30 MKII you may find that you don’t need your overdrive pedals anymore as the volume control on your guitar acts like a gain control on the amp depending on how hard you play. In fact, you may find that your favorite setting is to leave the Volume up all the way on the amp and use your guitars volume to vary between your clean and dirty tones! Couple this with its very effective Tone control, and the NewCastle 30 MKII can morph between pristine clean, hard rock and warm smooth jazz tones with ease!

Simple Is Better.

The NewCastle 30 MKII is a lesson in simplicity. Someone once asked us, “What’s your secret to great tone?” Answer: “Use good parts, and use as few as possible.” That is what the NewCastle 30 MKII is all about. The design was purposefully kept simple to make it easier to dial in and to keep your tone as pure as possible. During the design phase of the NewCastle 30 MKII we spent many hours working with artists, producers and engineers and we used their feedback to help dial in the circuit so that the NewCastle 30 MKII would work seamlessly with all types of guitars, pickups and effects and the extra effort was well worth it! The NewCastle 30 MKII is a perfect go-to amp for players looking to capture great tone either live or in the studio! Special attention was paid during the design of the NewCastle 30 MKII to guarantee that lack of headroom would never be a concern as is often the case with other 30W amps. To give as much power and headroom as possible, the power supply and output section were overbuilt to guarantee that the amp delivers every last bit of power possible out of it’s quartet of EL84’s! In addition to this, the NewCastle 30 MKII features a Variable Power Supply which allows the high voltage of the amp to be seamlessly adjusted from 100% power down to 10% power with no tonal change at all. The only difference is how loud the amp is! The tone and dynamics stay the same and all the touch sensitivity you would expect from a tube amp remain constant but now at bedroom volumes! Along with the power amp section, the preamp has been designed to handle single coil as well as humbucker equipped guitars with ease and without becoming flabby in the low end, even when the amp is cranked! Try the NewCastle 30 MKII yourself and experience its ease of use and pure rich tone, and we think you’ll agree that simple really is better!

Fully Featured.

The front panel features a single Input, Volume and Tone controls and the addition of a Power control. The Volume control acts as both a Volume as well as a gain control. The higher you run the Volume the more the amp will overdrive in response to how hard the player attacks the strings. The Tone control acts as a master tone control for the entire amp and works similar to the tone control on a guitar. Rotating the Tone control clockwise will increases the high-end response of the amp and conversely rotating the Tone control counter clockwise removes high-end response from the amp which helps when a darker tone is desired or with bright sounding guitars. The full clockwise position removes the Tone control from the amplifier circuit to keep your original tone as pure as possible. The Power control on the front of the amp is where you can adjust to total output of the amp. Not a master volume though! While the Power does control the overall volume of the amp it does so by varying the high voltage of the amp from full power, 30W Class A to 1/8W Class A. We suggest starting with the Power control at the 30W setting (fully clockwise) and adjusting lower as needed for the band or room you are playing in. Lower settings on the Power control will allow you to increase the Volume control for more gain while keeping the overall volume of the amp at a reasonable volume. For occasions when the player does not need to Power Scale the amplifier a Power Scaling bypass switch has been included that allows the player to completely bypass the Power Scaling feature and return the NewCastle 30 MKII to stock performance.

Like the front panel, the back panel is kept very simple. There are two speaker out jacks with an impedance selector switch that provides outputs of either 8 or 16 ohms. Located next to that are the Power and Standby switches as well as an IEC module with an integrated fuse and a switch for selecting between 120V and 240V operation. With the NewCastle 30 MKII you’ll never have to worry about traveling on the road since the amp is designed to work at all line voltages!

To make the NewCastle 30 MKII even more flexible, we have incorporated a series FX loop between the preamp and power-amp. Adding an FX loop here allows the player to use his/her effects in the loop and not interfere with the critical relationship between the guitar and preamp.

Like the NewCastle 30 MKII?
Want to know more?

If you like what you see and want more information about the NewCastle 30 MKII, fill out the form to the right and we’ll be in touch with you shortly!


Premier Guitar Magazine – June, 2012

NewCastle Review from Premier Guitar Magazine - June, 2012

NewCastle Review from Premier Guitar Magazine - June, 2012

NewCastle Review from Premier Guitar Magazine - June, 2012

NewCastle 30 Specs:

Front Panel Controls:
– Input
– Volume
– Tone
– Power
Rear Panel Controls:
– FX Loop
– Speaker Jacks
– Impedance Selector (8/16)
– Power
– Standby
30W Class A – 1/8W Class A Mallory 150 Series Capacitors
(2) – 12AX7 Preamp Tubes Carbon Film Resistors
(4) – EL84 Output Tubes Genuine Carling Switches
Cathode Bias 13 Ply Baltic Birch Cabinet with Dovetail Joints
Custom Wound 200W Power and Output Transformers Laser Cut Aluminum Chassis with Billet Cut End Plates
Laser Engraved Stainless Steel Panels Switchable 120V/240V Operation
35lbs. Head Size: 14″ x 8.5″ x 8.25″
Head Size (Boxed): 18″ x 13″ x 12″
1×12 Combo Size: 21.5″ x 18.5″ x 11.5″
1/8th Inch Circuit Board with 2oz Copper Traces Genuine Neutrik Jacks

5 reviews for NewCastle 30 MKII

  1. Rated 5 out of 5

    Jeremy Whitten

    Incredible clean headroom, FX loop and hand built in the USA. Love the simplicity of this amp—perfect!

  2. Rated 5 out of 5

    Emanuel Makhoul

    Great amp. Super simple to use, you cannot dial in a tone that will sound bad. It is really loud if you want it to be and surprisingly quiet when needed. It is very articulate and pronounced. Every detail of my playing is amplified, the good along with the bad.

    Build quality is fantastic and this is the only amplifier that has been allowed a place in the living room. It is simply beautiful.

    • Jackson Ampworks

      Thank you for the kind review! – Brad Jackson

  3. Rated 5 out of 5

    Michael Lower

    This amp is the best. Simple to use. I’ve really only needed volume and tone, and this amp delivers! Everywhere I go, I’m constantly getting compliments or remarks from people who say this amp looks beautiful. I have the baby blue one, and it is gorgeous! Thanks for making the best amp ever guys!

  4. Rated 5 out of 5

    Chris Vasquez

    I played this at The Music Emporium in Lexington MA. And this had an amazing clean tone. I was trying out a Collings Guitar that I was going to buy and this thing just sounded amazing. It was super clean with nice highs and lows and was super articulate. The more i dug in on the guitar the more it dirtied up, but man. It’s basically what I’ve always wanted in a clean channel, and when i got home and played on my practice amp I was so disappointed! It made what i used to think was a decent practice amp look like a dull lifeless amp. I will be getting a Newcastle someday in the future. Plus they’re from TX 😉 and it’s always nice to see things which such quality coming from my home state.

  5. Rated 5 out of 5

    Aaron D Sternke

    I have a Newcastle 18 combo (first edition – the tall ported one) and since getting it I have not even THOUGHT about buying another amp. When someone asks me how it sounds it’s hard for me to even describe it (Marshall-y? Plexi-ish? But also a little Vox-ish? But also really pretty and clean at lower settings??). Amazing amp. I’m emotionally attached.

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