I have been
looking real hard at those Orange "Terror" and Demeter hybrids and I'd surely love to try them. I guess I've grown cynical because I've tried the hybrid approach
so many different times in the past.
As recently as last month I lugged my old rack (SVT-IIP tube preamp + Crown PLX 2402 power amp) to a Jazz gig just to see how the double bass would respond. It was okay, but it didn't really win me over.
I will probably always hang on to at least one good Class D device for a handy backup. All 3 of my older tube amps have needed it.
Here's a review I wrote up for the Orange Terror Bass 1000 (Mods, I'm not endorsed by Orange or anyone else):
"Well, now that I finally have a cabinet that I can crank up the volume, I figured that I should share my experiences with the Orange Terror Bass 1000.
First off, there aren't many upright bass players using them, so if you're looking for tips & tricks on how to optimize it for the upright, you're in for a lot of interwebz searching. That's the bad news. I can only think of a few players like Djiorde who are currently using one. The good news is that its the first hybrid style amp I've tried that actually sounds more like a tube amp if that's what you're looking for. Also, the power rating seems pretty accurate (compared to other solid state/hybrid amps). Meaning it actually sounds like 1,000 watts.
The TB1000 is a really simple amp on the surface. It can run either a 4 or 8 ohm load through use of an internal limiter you can switch on the back. I thought this was a neato feature. It doesn't have any 1/4" speaker outs though, and even though it has two speaker outs, they only handle the sum of your load and the amp won't do a 2ohm load. Meaning, if you have two 8 ohm cabs, you have to select the 4 ohm option on the limiter switch regardless of if you have one cab hooked up to each output or your cabs connected in series and you can't run two 4 ohm cabs.
It has an effects loop that bypasses the preamp section but not the tube EQ, and a DI with a ground lift (thank you!). I've read that the DI is really hot (line level) but I haven't had a chance to use it yet. [update: I've used it and it works perfectly. This was apparently a problem only on the earlier first run amps].You can use a piezo directly into the input and it has a -10db pad, but I got better results using my FDeck HPF before the input. The input is 1mohm, so YMMV.
The tube based EQ section is really basic and not voiced flat at the 12 o'clock positions. I find myself wanting a graphic EQ (easily remidied) for notching certain frequencies, but for now, cutting all the mids seems to do the job with the bass knob at noon and the treble knob at about 11. How you set each knob effects the other selections though, so you're experience may vary depending on your cab, etc. The Orange Amp forum has some good info about how the EQ knobs interact.
The gain knob is very touchy, and the original tubes were microphonic at the get go. Reading through different forums, I settled on a JJ Tesla 12ax7 for the input (V1) and an EH gold plate 12ax7 for the EQ (V2).
These were better, but not what I was looking for.
Unlike many other hybrid amps, tube selection makes a big difference in the tone of this amp. If you have a friend who happens to have a bunch of preamp tubes you can try out, give them a call. Michael Quiroz was kind enough to let me test drive some before I bought them. Without his help, I might still be trying to find the right match. He lended me a box of about 100 preamp tubes for experimenting with.
I tried every combination of tubes in V1 & V2 that I could imagine. What I settled on was a Jan Phillips 12ax7wc for V1 and (surprisingly) a Fender rebranded GT12ax7 for V2. These two combined gave me a full, rich, musical tone that I loved. I also tried a Jan Phillips 5751 in V1, but found myself cranking the gain knob to about what a 12ax7 would be at with a lower setting. It did sound great and gave me some more headroom especially before feedback at higher volumes, but I liked the JP12ax7wc tone better.
How does it sound? Awesome. Especially the louder you crank up the volume. it seems to really come alive with the gain knob set at anout 9 o'clock and the volume at about noon. From there on up with the volume, it only seems to sound better. It still sounds great at lower volumes, but it really shines when you push it. You CAN get it to sound like your bass but louder with careful EQ'ing, but I preferred a little more girth and grit to my tone.
If you like that super clean slap tone it's probably not the amp for you, but if you like the sound of an SVT or a more "wooly" sound, this amp has it in spades and sounds especially fantastic playing pizz lines. The tubes seem to add a bit of natural compression just like an actual tube amp. More defined than an Ampeg B-15, but not as punchy as a real SVT. However, its 1,000 watts of goodness in an eleven pound compact package with a 70's era disco vibe. If GK amps are your thing, you probably won't like it. If Ampegs are your thing, I'd say its a big improvement over a PF800 or most of their smaller amps.
So, that's my take on it. Hope it helps anyone who's curious about trying one out. I love it a lot..."