Ashdown CTM-100 100-Watt Tube Bass Head

100-watt Tube Bass Amp Head, with Tube-driven Effects Loop, Tube-driven/Transformer-derived DI Output, and 2-/4-/8-ohm Outputs
Ashdown CTM-100 100-Watt Tube Bass Head image 1
Ashdown CTM-100 100-Watt Tube Bass Head image 1
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Ashdown CTM-100 100-Watt Tube Bass Head
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A Wide-ranging Bass Amp That's Ready for the Road

Inspired by classic tube bass amps, the Ashdown CTM-100 tube bass amp head is built for maximum performance. It's got the tonal range to cover everything from smooth and clean to overdriven and growling. You'll get plenty of punch, power, and headroom for small- to medium-size gigs from the CTM-100's power section, which packs two KT-88 power tubes. In addition to standard tone controls, you can fine-tune your perfect tone with deep, mid-shift, and bright switches. For a solid tonal foundation for your bass rig, it's hard to beat the rugged Ashdown CTM-100 tube bass amp.

Ashdown CTM-100 Tube Bass Amp Head at a Glance:
  • Built for powerful, rugged performance
  • Extensive tone shaping capabilities
  • Amazing direct tone with tube-driven DI output
Built for powerful, rugged performance

You'll know you're working with the real deal even before you plug your favorite bass guitar into the Ashdown CTM-100. Handbuilt in the U.K., the CTM-100 sports an 18mm Marine-grade birch-ply cabinet for unbeatable durability on the road. An internal cooling fan keeps the temperature in check for reliable performances at every gig.

Extensive tone shaping capabilities

From mellow '60s tone to growling '70s-style bass to thick and powerful modern tone, you can cover a ton of sonic territory with the Ashdown CTM-100. Standard tone controls give you a wide range of sweet sounds, while deep, mid-shift, and bright switches let you fine-tune your tone. Dual power amp tubes give you incredible punch, impact, and headroom.

Amazing direct tone with tube-driven DI output

Don't worry, your tone won't suffer if you plug your Ashdown CTM-100 directly into your sound system or recording interface. The CTM-100's tube-driven, transformer-derived DI output has an isolated ground so you get maximum sonic purity from this convenient direct connection.

Ashdown CTM-100 Tube Bass Amp Head Features:
  • 100-watt tube bass amp head with tube-driven, transformer-derived DI output
  • Perfect for live performance and direct recording
  • 2 KT-88 power amp tubes for amazing punch, impact, and headroom
  • Tube-driven effects loop makes it easy to enhance your tone
  • Dual-function front panel VU meter
  • Dual inputs for active and passive basses
Low-end supremacy is yours with the Ashdown CTM-100!

Additional Media

Bass Guitar Amp Buying Guide

Tech Specs

Type Tube
Number of Channels 1
Total Power 100W
EQ 3-band, Mellow/Deep/Shift/Bright Switches
Preamp Tubes 2 x 12AX7, 2 x 12AU7
Power Tubes 2 x KT88
Inputs 2 x 1/4" (High/Low)
Outputs 3 x 1/4" (8/4/2 ohms), 1 x XLR (DI)
Effects Loop Yes
Height 12.4"
Width 25.4"
Depth 11.8"
Weight 28.6 lbs.
Manufacturer Part Number CTM-100

Customer Reviews

Based on 3 reviews
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A Literal Freight Train

This was a step into the big leagues. I was always a guitarist first, so when I got into a band as a bassist I picked up a fairly cheap solid state head and a 410 to project my shortcomings with plenty of authority, telling myself this was just to get my foot in the door in the music scene and I'd be back to playing lead guitar in no time. However, here we are 2 years later and I'm more a bassist than a guitarist. I finally decided it was time to invest in my new instrument of choice that I was no longer terrible at and knew that tube was they way I wanted to go. My requirements were loud, deep, and dirty. It was a three-way tie between this, the Ampeg V-4b, and the Fender Bassman 100T. While those were wonderful amps, the few quiet tests I did at my local music store were somewhat steering me towards this amp. I asked the opinion of my sales engineer (shouts out to Alex Morales) and he suggested this one without hesitation. When I finally got to crank it at practice, it was everything I hoped it would be. It has a beautiful drive and harmonic distortion with tons of natural compression as the master volume goes up. Using a pick further coaxes some drive. The walls rattled because of the massive bass but it was never at any point muddy. Finally, 100 watts was perfect for me because given that I play with a dirty sound, I don't need tons of clean headroom and would rather have an amp I can actually crank a little. The drive pedal I had is now collecting dust as I get all of my tone and drive from the tubes. I won't try to directly compare it to the other two amps I mentioned, but suffice it to say that if you wanted to play loud, driven rock, I can't imagine something better. My only qualm is the passive EQ. It actually is very musical, it just can't change much. A dark bass will be dark and a bright bass will be bright. All you can do is mildly tweak it. Other than that, I can't think of anything I don't love about it. Stepping up to a pro amp was worth the investment.
Music background: Bassist, Sound Engineer

Holy Hell!

This thing warrants my first real review on Sweetwater.... I'm a bassist and studio owner/engineer/producer, and for a long time, I've been looking for an all-tube/reasonably low-wattage bass head, being that my workhorse for playing out is a 1200-watt Mesa V-12, and the 2009 SVT Classic that I previously owned just...sucked. My gear Guru, Mark Bruhn, had been ranting and raving about this thing for a while, and I actually found one to demo at a local shop. Sweet Baby Jesus was Mark right!!! With my Stingray, I can get tones from Reggae to Rancid and NOFX-style Punk to straight up Stoner Metal. I was playing it originally through an Eden 410, and I can't wait to try it out with my Mesa Powerhouse 810. I'm also anticipating epic classic rock tone when I plug in my '73 P Bass and can't even imagine how my Blast Cult one4five upright is going to sound with it. Being that I bought it mostly for studio use, the 100-watt version is perfect, but still VERY LOUD. I'm pretty skeptical of most modern amps, but being that a vintage SVT is out of my price range right now, this exceeded my expectations by miles. If I didn't live in an apartment, I'd be taking this home from the studio every night to rock out in all of it's fully-tubed glory.
Music background: Pro Musician, Recording Engineer, Producer, Composition/Audio Instructor

Absolute Monster

I bought this item kind of skeptical because there are not many reviews about it. But all I can say is I am amazed with its power for only being 100 watts. When the tubes overdrive it sounds absolutely punishing. I play it through an Ashdown ABM 414T and it is just produces crushing tones. I can't say enough good things about this amp. Perfect for doom or heavy rock. As I play in a doom band I need heavy punishing bass tones.
Music background: Semi Pro Musician
See also: Bass Amp Heads, Ashdown, Ashdown Bass Guitar Amp Heads