Harley Benton Custom Line Thunder 99

This little amp is quite a wonder. It has 2x50 watt (by 4 ohm) independent stereo channels and gives enough clean volume for a club gig at 8 ohms too. The sound is excellent and in comparison to my Pearce Gr2 the sound of the thunder 99 is a bit thicker. I had a problem running it in stereo over a 2x10 (16 ohm speakers) cab that was wired for stereo and mono use. Solution is to use a breakjack on both the (-) and the (+) of the cab, when using it in stereo. A cab wired for stereo and mono, uses a breakjack on one of the speaker (+) inputs to allow for stereo use when a second jack is inserted and mono use when this second jack is removed. On standard stereo/mono cabs like Marshall both the (-) of the speakers are connected together. This gave the problem that the Thunder 99 stuttered and gave no signal when using my tremolo/panning effect which threw the signal back and forth from left to right. I don't know why this problem only happened with the stereo tremolo/panning effect and not with any other stereo effects from the same pedal. So this problem can be solved by using a breakjack connection not only for the (+) but also a breakjack connection on the (-). I discovered this problem because it didn't occur when I used 2 separate cabs. So it's a brilliant and loud power amp with a great sound. I think a lot of Kemper users will be happy with the Thunder 99.

Bought this for use with a NU-X MG-30 mostly as I am trying to downsize the shear weight of my live rig. Have used it with a custom wired 4x12 and a home made 2x12 and so far it works exactly as it should. No issues with being shocked as mentioned in other reviews. I am in the USA and I had to supply my own plug for the power supply and I have no problems. This little thing works great it is plenty loud in the 2 configurations I mentioned that I am using it in and it doesn't seem to color the tone of my patches very much at all. I do wish it had some built in tonal adjustments on the pedal but not really necessary.

Both cabs I am using (though not at the same time) are wired for 4 ohms per side stereo and neither the Thunder nor the PSU gets hot at all.

So far so good - If the GPA 100 could use USA 120volts directly I'd buy one or two of those as well. This is the first Harley Benton gear I have purchased that wasn't a guitar. All 3 of my HB guitars are amazing so I took a chance on the Thunder 99 and I am glad I did.
Thanks.

I absolutely love this pedal. If it broke or was stolen, I would immediately purchase another. I run a wireless system into a drop pedal into an Hx stomp and stereo outs into a split cab. No need for an amp head at all, it just sits on my pedalboard making for a really portable gig rig. This pedal packs more than enough punch to keep up with a rock drummer and through a pa at a gig it is ear splitting at anything over half volume. I can't endorse it enough for the price. I only bought it as a stopgap whilst my amp was repaired and I've never gone back to the amp...! That says it all..

I was fairly impressed with what this poweramp pedal brought to my setup. for it's price it does exactly what you'ld expect.

No more lifting heavy amps for gigs.

Nice feature: you can even use this pedal with 2 instruments together. When both inputs and outputs are used, the Left will only output to de Left and the Right input will only output to the Right, zo this pedal saves the weight of 2 heavy amps for gigs.

One of my best purchases i've done on Thomann

Con : the adaptor is to large (it's larger then the pedal itself)

I built my first pedalboard, designed to be used with a clean stereo power amp system. For the power amplifier, I chose the Thunder 99 in front of 2 small VOX speaker cabinets, and the sound is amazing. Total control of the volume, Aux input, headphone output, and very clear amplifier status LED (Red = Mute, Green = Go) and instant mute control with the onboard footswitch. The amp is so small that the power brick is significantly larger, actually. I really like having a sizeable clean power amp at my disposal. I played a gig with my new system and I had the Thunder 99 up about 50% into 8 ohm loads. More than enough volume for a band with real drums. I'm finding other uses for it too and it's portable enough to take with me. Highly recommended!