Give me the low down, guys. I've tried them, I like them. But my Hartke is pretty good too. Blasphemy? No, no.
Absolutely not. "I like it" is good enough reason to have anything IMO. So long as whatever you have makes you happy.
I just like both of them just the same.
So tell me - What's so great about MarkBass?
Well, nothing... at least not compared to anything else out there on the market. Like everyone else they have some really nice products and, their products have particular characteristics. Those characteristics appeal to some and not to others.
I have an F500 and a Club 121. All I can do is tell you why I bought them.
First part of the decision process... combo vs. discrete head and cabs. Combo = easier to deal with... separate head and cabs = a bit more versatile and potentially lighter although... the CMD 121P is pretty light. Anyhow, weight is a big concern for me and, I can be a bit fickle so if I change my mind about the speaker, then I'm not married to an amp as I would be with a combo.
The F500 appealed to me because it has 2 semi parametric EQs. While a fully parametric would have been even better, a semi parametric is still very useful for making precise tweaks to your sound. Great for making the final adjustments to suit a specific room, etc. It's under 5 pounds so it's super light.
Sound wise the amp itself is not perfectly flat, it has a slight rolloff of the high frequencies. It has about a 1.75 dB bump at 250 Hz. It's down 0.75 dB at 10 kHz and by 20 kHz it's down 5 dB. So, out of the box set up "flat" to my ears (with my bass) it didn't sound quite as harsh as some of other heads I tried. Markbass' heads are probably known for their "VLE" (Vintage Loudspeaker Emulator which is basically a variable lowpass filter with a steepness of about 10 dB per octave) and "VPF" (Variable Preshape Filter). Maxed out the VPF feature provides a broad boost centered at about 40 Hz, an extreme 28 dB notch at 400 Hz, and about a broad boost centered around 7.5 kHz of about 7.5 dB.
Without going to the EQ, and using just the VLE and VPF filters you can get an interesting variety of sounds. I've experimented with attenuating the highs via the tweeter attenuator on the Club 121, and doing it via the amp and what I like is the tweeter attenuator at unity (no attenuation) and using the VPF and VLE knobs together. That still allows me to hear a little bit of "air" and "clarity" but the predominant sounds I get is fundamental (works nicely for blues).
Bass Gear Magazine has a very nice review of the F500 in issue 5 although the technical review has mislabeled all of the graphs from the Audio Precision. The correct labeling should be as follows:
Figure G - High Mid sweep (no problem there)
Figure H - Dynamic Response not treble sweep
Figure I - VPF not VLE.
Figure J - High frequency EQ not VPF
Figure K - Dynamic Response pushing the limiter not dynamic response
Figure L - VLE filter not dynamic response pushing the limiter
I'm guessing they made a simple mistake in their publishing software. I can't imagine someone hasn't pointed it out already but I would think that it would be pretty easy for them to update so maybe not. I'll send them a message just in case. Great review though. They have reviews of some other MB heads in other issues as well.
http://www.bassgearmag.com
The Club 121... I liked that it had a compression driver with a dispersion horn instead of a piezo tweeter. I really liked that it was only a smidge over 27 pounds, and I also like that can be used in a wedge configuration if desired.
YMMV of course.
Cheers, Joe