Menu
- Thomann is the largest online and mail order retailer for musical instruments, light and sound equipment worldwide, having about 10m customers in 120 countries and 80,000 products on offer. We are musicians ourselves and share your passion for making it. As a company, we have a single objective: making you, our customer, happy.
  
  +49(0)9546 9223-55
  
  international@thomann.de
- We have a wide variety of pages giving information and enabling you to contact us before and after your purchase. Alternatively, please feel free to use our accounts on social media such as Facebook or Twitter to get in touch.
  
  +49(0)9456 9223-55
  
  international@thomann.de
- Most members of our service staff are musicians themselves, which puts them in the perfect position to help you with everything from your choice of instruments to maintenance and repair issues.
  
  +49(0)9546 9223-476
  
  sc.cc@thomann.de
- Our expert departments and workshops allow us to offer you professional advice and rapid maintenance and repair services. This also affects the price - to our customers' benefit, of course.
  
  +49(0)9546 9223-476
  
  sc.cc@thomann.de
- Apart from the shop, you can discover a wide variety of additional things - forums, apps, blogs, and much more. Always with customised added value for musicians.
Close
Service
Contact us
Help

Delete all

Harley Benton Custom Line Thunder 99

44 ratings

Guitar Power Amplifier in Pedal Format

Compact power amp pedal for electric guitar
For direct connection to any preamp, pedal or effects unit
Power: 2 x 50W to 4 ohms
For 4 - 16 ohm speakers
Master volume controller
2 Inputs (L / R): 2x 6.35 mm jack
Aux input: 3.5 mm stereo jack with LED
2 Speaker outputs (L / R): 6.35 mm jack
Headphone output: 3.5 mm mini jack
Dimensions: 124 x 74 x 59 mm
Includes 24 V / 4.5 A power supply

These are other customers' choices:

Customers who looked at this item have bought these:

	54% bought this exact product Harley Benton Custom Line Thunder 99 Available immediately Available immediately This item is in stock and can be dispatched immediately. Standard Delivery Times	$88 Add to Basket
	11% bought HoTone Loudster Portable Power Amp	$139
	8% bought Harley Benton GPA-400	$179
	7% bought Mooer Baby Bomb 30 W	$79
	6% bought Electro Harmonix 5MM Power Amp	$70
Our most popular Electric Guitar Power Amps

44 Customer Ratings

5

24 Customers

24 customers have given this product a 5-star rating.

Of these, 16 customers have written no texts or given their feedback in another language.
4

9 Customers

9 customers have given this product a 4-star rating.

Of these, 9 customers have written no texts or given their feedback in another language.
3

5 Customers

5 customers have given this product a 3-star rating.

Of these, 5 customers have written no texts or given their feedback in another language.
2

5 Customers

5 customers have given this product a 2-star rating.

Of these, 3 customers have written no texts or given their feedback in another language.
1

1 Customer

One customer has rated this product with one star.

4.1 /5

handling
features
sound
quality

Problems running in stereo over a stereo/mono cab

Boef, 01.01.2021

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.

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

Great idea...but

SlackboyJim, 03.10.2019

I got excited about this product early on in 2019, and ordered it for arrival in July. Product arrived ok, and worked a charm with Mooer compact preamps meaning I had a HUGE amount of tonal and volume choices from a very compact pedal board. The Thunder was loud enough in to 2 x 12 to keep up with drummers in bands (match that impedance, though!!) and was "clean" and uncolouring. Even the size of the volume meant I could gently ride my level when the band got excited. BUT....
After 1 month of use I found I was getting electric shocks from the unit. I isolated it from the rest of my gear and so ONLY the pedal and PSU were in use, and sure enough 5-8V were measured. I could "solve this" by plugging in to an earthed product but that isn't right. Unit is being returned and I'll update you when I have news...

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

Good value for money

LooneyLoo, 19.11.2019

I have an AX8 and bought this to power my 2 x 12 cabinet. I gig weekly at a relatively big venue and wanted something that would compete with the drum volume level. It does it's job fine and I find it quite transparent, it does not colour the sound. The only issue I have with this is that sometimes I get electric shocks from touching it!! it's quite annoying and I usually avoid touching it when it's powered! Apart from that it's a good budget power amp. Don't know if I would recommend it though because the electric shock issue is quite a problem for me...

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

Simply unusable

F#, 06.04.2020

I read too many negative reviews of this product yet I decided to trust a Thomann product due to it's Thomann in house brand and usually I am fine with their stuff and I end up buying it attracted by the promoted features . But ho boy how this product disappointed(I don't even want to call it an amplifier) reached a level of rarity that I encountered not so often.

Pro: it's small. period.

Cons: One con to rule 'em all => It is not properly electrically isolated (log story short) and it makes and heck of a noise that you can cover only if you are playing or can be attenuated if you just touch the strings of the guitar. not what i want to have to deal with or to do . it's happening just with this device, with other amplifiers I do not have and never had such kind of problem.

I still have trust in Thomann products. And I will try to have it replaced despite I received it just a little bit over than a month ago.

Have a nice day!

Helpful · Not helpful · Report

Do you believe this rating to be inaccurate or unacceptable for some reason?

Please give us the reason for your assessment in the following text box and – if possible – your e-mail address for further questions. Send report

$88

The shipping costs are calculated on the checkout page.

Available immediately

Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times

Add to wish list

sales rank in this product group	4
at thomann.de	8999

item number	451331
sales unit	1 piece
available since	May 2019

Total Rating
handling
features
sound
quality

Show all

Harley Benton - Thunder 99 - Stereo - Poweramp - pedal -

Harley Benton

Show all

Harley Benton - Thunder 99 - Stereo WET/DRY Rig -

Harley Benton

Show all

Guitar Amps

The following pages give an overview of the various types of guitar amp available.

Show all

Specs

PDF

Smart Navigator

Current product

Harley Benton

Custom Line Thunder 99

Compare

Compare

Compare

Compare

Loudster Portable Power Amp

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

Compare

* The prices shown exclude VAT and are valid as long as stocks last. Please click here for international shipping rates. Goods subject to custom declaration; customer fees to be paid on delivery if applicable. We do not accept liability for typographical errors or inaccurate information of any kind. All invoices will be issued in USD.

(4)

Roland FP-30X BK

Roland FP-30X BK; Digital Piano; 88 keys PHA-4 keybed with Ivory Feel; Sound engine: 12 SuperNATURAL Piano tones, 20 E-Piano tones and 24 other tones; max. polyphony: 256 voices; Bluetooth Audio (V3.0) and Bluetooth MIDI (V4.0); build-in speaker system (two...

Audient iD14 MKII

USB-C Audio Interface 24 bit / 44.1 - 96 kHz, ADC dynamic range: 121 dB, DAC dynamic range: 126 dB, 2 x Audient Class A console microphone preamps, 2 Combined mic / line inputs: XLR / jack combination socket,...

Roadworx Microphone Arm

Roadworx Microphone Arm, microphone desk arm with cable management, cables with a diameter of up to 8mm can be attached to the underside of the arms with a clip system, aluminum construction, locking central hinge, 3/8 "thread connector with 5/8"...

(1)

Kali Audio IN-5

Kali Audio IN-5; Active near field monitor; 3 way system with coaxial midrange/tweeter; 5" woofer; 4" midrange; 1" soft dome tweeter; power: 160Watt (80/40/40Watt Tri-Amped); frequency range: 39Hz - 25kHz; max. SPL: 112dB; EQ for adjustment to the location; connectors:...

(1)

Zoom Am7

Zoom Am7, mid-side stereo microphone for Andriod devices; USB type C connection; 90º / 120º / M-S mode switchable; max. SPL: 120dB; resolution: 44.1kHz / 16Bit, 48kHz / 16Bit; for creating videos, podcasts, vlogs and more; two modes: audio and...

(5)

iZotope Tonal Balance Bundle CG 2

Plug-in Bundle Crossgrade from any paid-for iZotope-/Exponential audio product to Tonal Balance Bundle, Professional software tools for producing, mixing and mastering, Supported formats (64-bit): VST 2/VST3/AU/AAXnative/NCP, System requirements: Windows 7 (64-bit), Mac OSX 10.11.6 - 10.14.4, paid-for and registered...

Lehle P-ISO

Lehle P-ISO; Isolator and DI box, no signal loss or hum; High-Impedance Lehle Transformer HZ; suitable for balanced or unbalanced signals; Passive, no need for a power supply; galvanically isolate devices to prevent ground loop hum, also use as a...

(1)

Rode VXLR Pro

Rode VXLR Pro; Plug adaptor with transformer and power converter; TRS mini jack (3.5mm) to XLR3M; integrated voltage converter from phantom power (12 - 48V) to plug-in power (4V); for connecting VideoMic, VideoMic GO, VideoMicro, VideoMic Pro, VideoMic Pro+, VideoMic...

Decksaver Pioneer DJ DJM-S11

Decksaver Pioneer DJ DJM-S11 - for Pioneer DJ DJM-S11; Protects against dust, dirt, liquids and shocks; Milky transparent surface; High quality; Made of polycarbonate; Dimensions (LxWxH): 27,20 x 43,00 x 3,5 cm, Weight: 0,5 kg

Showtec ACT Fresnel 50 WW

Showtec ACT Fresnel 50 WW; DMX controlled Fresnel theater spot complete with barndoor, filter frame and 1.5 m connection cable; 40 W COB LED; Color temperature: 3200 K; Luminous flux: 3400 lm; manual zoom (10 ° - 58 °); manual...

(6)

Antelope Zen Go Synergy Core

4x 8 USB-C Interfaces with Synergy Core FX Processing Platform AD/DA conversion with up to 127 dB headroom, 2 Microphone-/Line-/Hi-Z inputs via XLR combo jacks, Discrete ultra-linear preamps with 65 dB gain and 48 V phantom power, Digitally expandable...

Zaor Miza 88 Flex Wengé Grey

Zaor Miza 88 Flex Wengé Grey; studio desk with 19" rack and keyboard tray; offers space for computer monitors (2 x 30"), keyboard, mouse, DAW controller, monitor controller etc.; 2x 4U 19" racks and central drawer; extendable tray, height adjustable...

Give Feedback

Feedback Found an error or want to give us feedback about this page?

We're looking forward to hearing from you and aim to solve any problems as soon as we can.

Harley Benton Custom Line Thunder 99

Guitar Power Amplifier in Pedal Format

These are other customers' choices:

Customers who looked at this item have bought these:

YouTube on this topic

Smart Navigator

Compare Similar Items

Harley Benton Custom Line Thunder 99

Guitar Power Amplifier in Pedal Format

These are other customers' choices:

Customers who looked at this item have bought these:

Related Products

YouTube on this topic

Smart Navigator

Compare Similar Items