Doug Aldrich has spent most of his life standing in front of loud valve amplifiers. From learning how to coax tone out of vintage Marshalls to filling theatres and arenas with Whitesnake, Dio and The Dead Daisies, his sound has always been about feel and authority.
But taking vintage guitar amps on the road comes with some compromises: ageing components, inconsistent behaviour night to night, and the constant worry that something irreplaceable might fail mid-show or even get stolen.
Article continues belowBuilt around the DNA of Blackstar’s HT Stage 100, the DA100 Ruby evolved through months of hands-on tweaking, in-person R&D sessions and real-world testing. The result is a three-channel, dual-voiced 100-watt head, designed not just to reflect Aldrich’s signature tone but to function as a practical working amp.
I’ve known those guys since the beginning when Blackstar was formed. A couple of them came from Marshall and back then I was playing Marshalls full-time and starting to build a relationship with Jim Marshall himself. Blackstar first reached out to me years ago, but the timing was bad because I was fully in with Marshall at that point.
Over the years I kept running into Blackstar amps in stores or I’d hear some of my buddies playing them. Every time I plugged in, I thought, ‘Man, these amps are killer.’
Later, when The Dead Daisies were looking for someone to work with that was genuinely excited about the band, Blackstar stepped up. They loaned us some amps for a tour and I loved them. After that, they asked me if I was interested in collaborating on something.
Had you ever seriously considered doing a signature amp before this?
I had thought about it. I was always looking for something that could replace my vintage amps on the road. Those old Marshalls sound incredible, and I still have them, but parts fail, capacitors go, transformers get tired… all the stuff that comes with old gear. I talked to a few different companies about doing something. I messed around with some ideas with Marshall.
I spoke to Engl, and had conversations with John Suhr about doing a Custom Audio amp, but it never really took off. With Blackstar, it felt different right away. They wanted to come to me, hear what I liked and actually work through it together.
From a design standpoint, where did you start with your amp?
The starting point was the Blackstar HT Stage 100. I was already a big fan of that amp. It has a great tone and touch response that I really like, so I didn’t want to reinvent the wheel. The idea was basically, ‘You like this amp, so let’s start here and tweak it.’
That’s really what the DA100 Ruby is. It’s not a radical departure; it’s kind of a refined version of something that already worked. People think of me as a hard-rock or metal player, but I love a lot of different styles, so flexibility was a huge part of the design. I didn’t want a one-trick metal amp.
What were the first things you wanted to adapt and in what way?
Mostly subtle stuff. We talked a lot about the midrange and just nudging certain frequencies slightly down so it wasn’t overly forward. We also talked about gain structure. I wanted plenty of gain, but I didn’t want it to feel buzzy or overly compressed. Everybody knows me for heavier sounds, but I also play a lot of straight-up rock. I wanted the amp to cover that ground without sounding too heavy.
What was the R&D process like?
One of the coolest R&D sessions was around NAMM 2023. A few of the Blackstar engineers from England were in town to work on some stuff with Jared James Nichols, so we met up at a studio in LA that Jared was working out of.
[Blackstar design engineer] Paul Stevens had this prototype where the main circuit board was pulled out and wired, so we could tweak things in real-time. He’d ask what I thought, I’d listen and suggest changes, and then he’d swap components or adjust things with a screwdriver. That kind of hands-on experience was really cool.
How long did the full development process take?
About eight months from the first serious conversations to the final version. After the session, they went back to the UK, refined everything and sent prototypes over. I didn’t want to ask for a completely different chassis or layout. Blackstar already had a solid blueprint with the HT100, so we worked with that to get the sound and feel right.
Blackstar has a facility here in the LA area so it was easy to get in there and test things. But they also sent a prototype from England. The cool part was that the prototype was basically exactly where we’d left off from our initial session.
So there were basically two prototype test sessions before I said, ‘This is it, let’s go for it’
So there were basically two prototype test sessions before I said, ‘This is it, let’s go for it.’ From there, it was like, ‘How do we make this work with the electronic parts and keep it in line with how Blackstar actually manufactures amps?’ They had a good outline to start with, so we just tweaked it.
Did you bring your own cabs along to test the prototypes?
Blackstar asked me what cabinets and speakers I liked. I told them Celestion Greenbacks and Vintage 30s. When we toured, they let us borrow some cabs and they sounded great.
They thought I would like the UK Vintage 30s better, so they brought 4x12 cabs loaded with those speakers for me to test the amps. There are different versions of the Vintage 30, but I think the UK-made version sounds the best.
Was there a feature you were adamant about adding beyond the tonal changes?
“A footswitchable effects loop was a big one for me. I didn’t want to run a long cable from a delay pedal on the floor and then back to the amp, just to get to the effects loop. I wanted that stuff back by the amps, and I liked the idea of being able to switch the loop off and on from a pedalboard.
In the beginning, we focused on the tonal aspect and got that right. Then they went back, worked out the loop switching and built the first proper prototype that combined the tonal tweaks with a switchable effects loop, along with a five-button footswitch.
I also wanted to make sure the amp’s distorted sound wasn’t too buzzy. I play more hard-rock than metal these days, and I wanted a really pure note coming off the guitar. You can always add aggression with a pedal, but the core tone has to be right.
Volume management is a big issue with high-wattage valve amps. Did that influence the amp design at all?
Yeah, the volume issue was a big deal. In rehearsals, when the amp was loud, it sounded incredible. On tour, the FOH soundman is always on me to turn down. But it’s a tube amp and you have to wind it up a bit to hit that sweet spot where it doesn’t sound fizzy.
So I told the Blackstar guys that I wanted to make sure the amp stays full and articulate, even at lower volumes. It also has a switch that lets you go from 100 watts down to 10, which really helps sometimes.
There’s something about the tone of running four EL34s in a 100-watt head that you just don’t get with lower-wattage amps. They sound very different. 100 watts just sounds bigger and feels better to me, so I usually stick with that.
Tell us about the matching 4x12 cabinet.
We experimented with different speakers and landed on the UK-made Celestion Vintage 30s that we tried initially, but the cabinet itself is different from Blackstar’s standard HT cab. They had to redesign it to get it tuned right with the amp and the Vintage 30s.
They used thicker wood for the baffle, which makes it heavier but more solid. The thinner baffle from the HT cab was moving a bit too much from vibration. The heavier construction on the DA412B cab sounds much tighter and way more focused. It sounds insane!
How do you typically run the amp live?
It’s a three-channel amp with two modes per channel, so there’s a lot of flexibility. I tend to live on the Crunch channel and use my guitar volume constantly.
For heavier parts I’ll hit a boost or switch to the lead channel. The transitions – switching between channels – are really smooth, which is something I’ve struggled with on other channel-switching amps. No problems at all with this one.
So you’re still using pedals for gain?
Definitely. You don’t really need pedals for gain because there’s plenty there, but the amp responds really well to boosts and overdrives. A Tube Screamer-style mid boost works great.
Lately, I’ve also been experimenting with fuzzes and different overdrives. The key thing is that the amp has great low-end and clarity, so using various pedals is more about adding different colours and textures.
It feels like the amps I grew up with but with features that fit today’s world of touring, recording and volume limits
How has your tone changed or evolved throughout your career?
Early on I was all about maximum gain and aggression. Over a period of time I realised you don’t want to always be on 10. Dynamics are now a big part of my sound: I want something that responds to my hands first and then gives me the option to go over the top when I need it. This amp is extremely versatile and really reflects where I am now as a player.
Looking back at everything you’ve played over the years, where does the DA100 Ruby stand?
It feels like the amps I grew up with but with features that fit today’s world of touring, recording and volume limits. It inspires me every time I plug in and it works night after night without any drama. That’s the ultimate goal. It’s a killer amp!
- “A new benchmark for heavy guitar sounds at a relatively accessible price point”: Blackstar DA100 Ruby review
- This article first appeared in Guitarist. Subscribe and save.
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