Love this Bass head. Great warm tones for a Black Sabbath kind of sound while and at the same time when you set it right I can jam some poppy slap RHCP Bass sounds with little to no problem. I've used this head for 7 years now and I love it.

Powerful, but noisy and heavy.

Has pro features: compression, EQ, line out. Reasonably priced for its output!
Just too noisy and heavy for me. Thirty years ago, I would have LOVED to have such an amp. Technology has progressed since then.
That doesn't make this bad! In fact it is BETTER than many newer cheap "class-D" amps that claim mega-watt output but short us on delivery.

Controls are intuitive, assuming you understand what they do. Too many tyros make "smiley faces" with graphic EQs or do other dumb things like try to get MORE VOLUME by boosting low end. If i needed an amp for a rehearsal or recording studio and never had to move it, this would be a great choice. If you are a traveling musician, you may want something lighter.

Let me just start off by saying that I have used the Ampeg B-2RE Bass Head and the Ampeg SVT-CL Bass Head. If you aren't familiar with amplifier heads, they are fairly high-end heads. I bought this head because I had two bass cabinets and two speaker cables, but no head. I had to resort to borrowing the Ampeg B-2RE Bass Head,from a guy at my church, when the Youth Praise Band was going to play at a Youth Rally. Just so we are clear, I am the bass player in the band. Anyway, I have been longing to own an amplifier head of my own for quite some time. Just as luck, or God, would have it my mom, dad, and church - the band previously played at - I finally had enough money to purchase one. This particular one has been on my Wishlist for quite a while. I'm not going to lie, I know less than nothing about Hartke except thatthey are a fairly decent brand. In light of this I purchased this head on April 26, 2012. It arrived exactly two days later. I immediately opened the box and set this beauty up. Now my excitement was the primary driving force and I just wanted to try out my FIRST amp head. It has a 10-band Graphic EQ similar to the Ampeg B-2RE Bass Head. That was good since I had a bit of experience with that. It also has a Compression knob. As far as general EQ it has a High and Low know, then a Master Volume. Before I get to far the Master Volume really controls the volume as opposed to some heads thathave a gain that makes it difficult to control the volume without altering your gain level. On this head the volume control works as it should. Now one cool thing I am not familiar with is the Tube Emulation and Solid-State Preamps. I've never seen or used anything of this nature so I can't tell you anything about it. As for the compression, I doubt I will use it. I'll probably keep it down low since I can add some compression on my bass guitars. For example, I have a Yamaha RBX374 that can be compressed by altering the 2-band eq. I also have a MusicMan StingRay that can be compressed from the guitar itself. So the compression feature is useful if you have a crappy bass that lacks tone controls. In this case a Pete Wentz Signature P-bass. It only has a volume control. Anyway, I love this head. I am close to getting the EQ set the way I want it. Don't let this review cause you to have second thoughts about buying this. Oh and I am sorry for all of the rambling I did. I would recommend this head to any intermediate>semiPro players. I run this through Seismic Audio 4x10 & 1x15. The head puts out a very deep and rich low and a "punch you in the mouth" high. The attack that you can get with his head almost resembles Victor Wooten's setting. (His is PERFECT) You will not be disappointed by this head. It looks complicated, but the Graphic EQ is probably the simplest feature on the deal. My sister could probably set it and she doesn't even play bass; much less own an amplifier of any kind. You need to buy this before they go out of stock. This is a steal. I mean come on! It's only $249.99! Don't hesitate because you will be sorry. I mean you could get better, but there will always be a better one out there. (Markbass as an example) You need to buy this whether this will be your first, you already have one, trying to replace, looking to expand your sound, etc. Whatever the reason buy this bad boy.

This amp is a powerhouse. 350 W on this blows away any class D amp at even double the power. I highly reccomend this amp. Its replaced all others in my stable including a Mesa Boogie tube amp.

I have been a devote Ampeg SVT with 810 cabinet user, but at over 60 years old, they have become more & more of a pain in the ..... to deal with. I will not replace them as a larger venue dictates they get used. However, I was looking for a lighter, easier to handle solution.

I HAVE FOUND IT! I have paired this amp up with the Seismic Audio 2/10 & 1/15 cabinets and I not only have a decent practice rig, but this combination works with any small to medium sized venue.

I choose this amp not only because of its power (rated at 350 watts into 4 ohms, but I haven't come close to testing that!), but I love the twin Pre-Amps that blend tube with solid state. Not a SVT, but the tube does a good job. Built in compressor works well too although I wish it came with footswitch. Find myself using slight compression with any additional being used with stomp box.

Has 10 band EQ with good tone range and 15 dB of boost to each band. It also has low pass & high pass contour controls which took some effort to "dial" in. The low pass provides 18 dB as 100 Hz and the high pass 18 dB at 10kHz. If you set EQ flat to start, then experiment with contours, then fine adjust EQ it might be easier.

I do wish the amp had a side mounted carry handle, but it does come with rack mounting hardware if you wish.

Great little amp that I highly recommend.