Harley Benton PA-100 Power Attenuator

Power Attenuator

  • Useful tool for rehearsal room, live and recording applocations
  • Tube amplifiers as they sound best - high output level with reduced and controlled volume
  • Can also be used as a dummy load
  • Input power up to 100W
  • LED with overload indicator
  • Quiet fan
  • Controls: Speaker Level and Line Level
  • Inputs: 4/8/16 Ohm
  • Balanced speaker output
  • XLR DI output with speaker simulation
  • Dimensions: 19 x 14 x 11 cm
  • Weight: 1.5 kg

Further Information

Impedance 4, 8, 16
Noise Supression No
DI Interface Yes
Speaker Simulation Yes
Dummy Load (usable without cabinet) Yes

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31 written ratings Read all reviews

Alone and with Helix

Boddumblues, 05.03.2018
I got this unit and hoped it would work for me, and it does.
I wanted the mic sim and line out to be before the the dampening,
and thankfully it was easy to convert it to this.
I did not want the line out and mic sim to follow the dampening.
I added a 25 k pot on the mic sim out to add more control. Now I use it with my Marshall 6100 head and a VOX AC-10 (with a speaker in mod), and am quite pleased. I do find that mic micsim signal kind of collapses. But when using the linesignal through a Behringer Ultra-G Di. box I have a beautiful full signal. Of course it would be nice to have the micsim do it, but the Behringer just sounds better in every way. For the price of the PA-100 and the Ultra-G and my mods, you have a package that is hard to beat. ;-)
I do run presence on 100% on the 6100, and raise the treble on the AC-10 but it's fine.

What this unit allows for also, is use of the lineout in different ways;
1: Load your amp into a Helix.
I have patches in my Helix based on a VOX AC-15, but if I want to have my real AC-10 replacing the modelling amp, i can patch it in via one of the loops (line level) and it works like a charm.
I hear my amp in real life, the FOH gets a lineout from the Helix with the real amp through the Helix, and then I play with IR's, mainly Celestion Blues and Golds - sweet!
2: Lineout + IR's
The lineout without the micmod can have IR's added (Moer Radar etc.) to add flexibility and quality to the sound. Even using my Digitech RP-155 just as a cabinet simulator opens up a lot of sounds.
So there are a lot of sounds waiting to be heard.
Also in a DAW. Cheers ;-)
03-07-2018 Update
I tested running a JOYO JDI-01 from the line out, and man what a difference to the mic-mod out it is, it really works now, the cab sim on the JOYO is sooo much better in fidelity, the AC-10 really shines through the mixer now. It also beats the Behringer in clarity (the Behringer only has 1 cab sim, a 4x12, the JOYO has a 2x12 combo sim and a 4x 12 sim), I am very very pleased with this new dicovery!
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Replacement after 1st Failed

Ed Bray, 04.08.2018
Nice little bit of kit, I use it with my Vox AC30 and Bugera T50, both work great through it when it works properly. Unfortunately my first one worked okay for a short while and then it developed a fault which caused all the sound to be distorted through the speaker even whebn the amp was set to a clean signal. I use it with my Bugera T50 to allow the use of a 25W Greenback in a Harley Benton 1x12 Cabinet and it works great like that. I have used it with the Vox AC30 to allow a line out signal to go direct to the mixer.

Works well, and good value compared to similar items.
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