Are these amps & cabs the rolls Royce of gear? How come they are not more popular? What do you about this mysterious mfg? Subject line should say Glockenklang.
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The Blue Soul uses the same preamp (from their "Soul" amp) as the Heart-Rock as far as I know, but of course the poweramp makes it sound a bit different.
Don't worry, their stuff is very expensive here in Germany too![]()

For the OP, here is a picture of my Blue Soul on top of my Bergantino AE212. Classy looking piece of gear with the feel, look and slam of a lead sled in a reasonably small, baggable 11 pound format
A few cool features that help communicate the thought that goes into these amps.
- the master volume control is an audiotaper design (like a mixing board volume slider), so you get a very even increase in volume through a large part of its travel. The amp doesn't even start to pump until the master is past noon.
- defeatable EQ so you can quickly A/B the neutral/flat tone of the amp with your EQ settings
- Second input has its own volume control AND a sophisticated mixing board type pad control for hot output basses. So, basically a variable pad versus the 'all or nothing' 15db pad/active setting of most other amps
- indicators for both preamp 'overdrive/clip' and power amp clip, along with indicator lights for mute, effects loop on/off, etc. In other words, indicator lights and switches for almost every function of the amp.
- EQ gain/cut amounts (i.e., +/- db range) are adjusted to match the way the human ear hears frequencies. So, the midrange has a tighter range of boost and cut than the deep bass or upper treble, resulting in the impact of the boost and cut being the same across the EQ bands at the same 'knob setting'. In other words, the EQ knob travel impact on the perceived volume of the boost or cut is adjusted to match the differential non-linear impact of those frequencies on perceived volume. So, a visual inspection of EQ levels across frequencies is highly correlated to what you are actually hearing.
- The class D/SMPS power module is actually a 1000 watt rated high end unit (forgot the name of the manufacturer, but it isn't the typically ICE module used in most micros). So, the 650 watt rating is very conservative, and I assume they have the power output limited down to keep the THD levels and power delivery levels relatively constant across the full range of the amp's frequency output at high volumes.
- The pots they use on this amp feel like the pots you would get on a $5,000 custom home stereo power amp. They almost feel like they are filled with oil or something. Very tight, very smooth, very 'heavy' feeling.
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Sounds good to me.![]()
I'm down to the Blue Soul or the TecAmp Puma 900 at the moment, both look good. Unfortunately, I'm not able to try any of them. Have to make sure to get the 30 return option.
Then there's the GK MB800 which is a lot less money, but I don't think I would like those agressive upper mids with the Barefaced Big Twin T. Kind of tired real quick of that heavy GK voicing also.
Blue Soul vs Puma ut is!![]()
Sounds strange....your last option may very well be correct.![]()
Wow, great feedback guys. I guess now I'm going to be on a mission to try one of these heads. The only reason I remember them is because Bass Player did a review on some of their geat like 15 yrs ago.
I would just need something like a 1x15 and a head/preamp.
Now my gears are thinking; what if I added their onboard preamp to my passive jazz bass?
I wanted to love Glock amps so badly; I convinced myself that I HAD to have one. However, I wasn't about to drop $5000 on an amp without playing through it first.
So, I took my bass to the big bass place in L.A. and played through a Heart-Rock II. I was so disappointed that I couldn't speak.
Glock amps faithfully reproduce the sound of your bass, as was stated earlier in this thread. They do nothing more. To me, it sounded completely sterile.
This is NOT a put-down to Glockenklang. I simply have different taste in amps. I have played through everything I can find, and I always go back to Mesa/Boogie amps. They provide the sound that I love. Just a matter of personal preference.
I do feel bad for the folks who love Glock amps and buy them; not only are they expensive to an order of magnitude that I can't understand, they must be made of moon rock, cuz they weigh a metric ton.
Glocks are often used for instrument evaluations in Bass Player and similar magazines, as the sound is so clear and unfettered that it provides the most faithful reproduction of the instrument itself. So, like anything else, play it first. Make sure you love it before you buy it.