Mesa/Boogie PowerHouse Reactive Attenuator

zZounds Gear Experts Say...
Tame your beast of a tube amp! The PowerHouse Reactive Attenuator features impulse responses, four levels of power attenuation, and a voicing switch.

Aficionados, this is the power attenuator you've been waiting for. One that puts Tone and feel first and includes valuable features you need while preserving the magic of your tube amp in all its harnessed-volume glory.

Mesa starts with a reactive Load, an expanded version of that used in the CabClone IR series, that protects your amp's power section and imparts much the same frequency and response curve and reacts with your amp's power section in much the same way your favorite speaker cabinet does, yet allows you to run silently and safely when a live speaker cabinet can't be used.

Set to LOAD or SPEAKER, you can take a signal out the optimized LINE OUT " output on the Rear Panel and feed your destination of choice, from Impulse Response players to additional amplification for headroom, consoles for re-amping to effects processors or anywhere an unprocessed signal (no Cabinet Simulation such as that found in the CabClone IR Series) is appropriate.

In SPEAKER Mode, the two SPEAKER jacks on the Rear Panel function just as those on your amplifier do. In either case, the Attenuator is active and you can use it to reduce the output of your amplifier safely The Attenuation Control in PowerHouse is full featured and provides a Bypass plus 4 Power Reduction levels, -4, -8, -12 and -16dB, with the lowest setting featuring an infinite attenuation LEVEL control that allows whisper soft volumes and below. A Voicing Switch rounds out the Front Panel and includes NORMAL, BRIGHT and WARM read more settings on the 3-position mini toggle. Output to your Live Cabinets are covered as well with two " OUTPUT jacks wired in parallel, so running additional Extension Cabs is easy. The PowerHouse can handle amplifiers up to 150 Watts and is available in 4, 8 and 16 Ohm impedance versions/ratings.

Made in Petaluma, California "Home of Tone" with the finest materials and craftsmanship.

Features:

- Dynamic Reactive Load Circuit + Attenuation provides the feel and tone of your amp running at its optimum output at any volume, with or without a real speaker cabinet!
- Rated for Amps up to 150-Watts
- Attenuator Switch provides 4 levels of power/volume reduction, -4dB, -8dB, -12dB and -16dB
- -16dB Level Control allows infinite power/volume reduction down from the -16dB position
- Speaker/Load Switch Choose between using your live speaker cabinet or the internal reactive load
- Normal/Bright/Warm Voicing Switch
- One 0.25" Input Jack (From Amp Speaker Output)
- Two 0.25" "To Live Spkr Cab" Output Jacks
- Independent " Line Level "Dry" Output Jack (exact signal from amp's speaker output) with Level Control
- Fan Cooled
- Tall Rubber Feet - Allows PowerHouse to sit on top of most amps, clearing the handle
read less

-Dimensions: 8" W (with knobs) x 7.375" D x 3.5" H (with feet)
-Weight: 4lbs 1.7 Oz

Dimensions and Weight in Packaging

16 Ohms

  • Shipping Weight: 4.66 lbs
  • Shipping Dimensions: 10 x 9 x 4 in
  • Manufacturer Part Number (MPN): AC.ATT16

4 Ohms

  • Shipping Weight: 4.67 lbs
  • Shipping Dimensions: 10 x 9 x 4 in
  • Manufacturer Part Number (MPN): AC.ATT4

Open Box (Like New), 4 Ohms

  • Shipping Weight: 4.67 lbs
  • Shipping Dimensions: 10 x 9 x 4 in
  • Manufacturer Part Number (MPN): AC.ATT4

8 Ohms

  • Shipping Weight: 4.7 lbs
  • Shipping Dimensions: 10 x 9 x 4 in
  • Manufacturer Part Number (MPN): AC.ATT8

Open Box (Like New), 8 Ohms

  • Shipping Weight: 4.7 lbs
  • Shipping Dimensions: 10 x 9 x 4 in
  • Manufacturer Part Number (MPN): AC.ATT8

For support or warranty questions, please contact the manufacturer:
Phone: 707-789-3348, 1-800-4GIBSON
Email: service@gibson.com
Web: https://www.mesaboogie.com/support/

Reviewers gave this product an overall rating of 5 out of 5 stars. (1 ratings)
Submitted August 2, 2025 by a customer from yahoo.com

"Mesa boogie powerhouse attenuator"

Overall: 5 out of 5 stars
(see rating details)
Verified Purchaser zZounds has verified that this reviewer purchased this specific product from us.
I love this product. Now I’m getting the sound I want and I’m much lower volume. Mesa gives me this incredible tone, and now I don’t have to annoy my neighbors to enjoy it.
3 of 3 people (100%) people found this review helpful. Did you?
Thanks for your opinion!

4 Ohms

$559.00
  • 8 payments of 
    $69.88/mo
FREE -Day Shipping!
Get it for 
Get it (or get it with an order of ), if you order within
Shipping to