Procool HK640B + RM40 Bundle

1U Rack mount Fan System and 4U Rack Mount Brackets
Designed for the Hughes & Kettner Grandmeister Deluxe 40 Guitar Amp

x out of stock

4 Reviews

  • Description
  • Specifications
  • More Info
  • Reviews

PROCOOL HK640B with RM20 or RM40 Bundle for the Hughes & Kettner GRANDMEISTER!

The Fan:

Model HK640B is a medium airflow, quiet 1U rack mount fan system.
(6) 40mm Procool Blue LED fans deliver the airflow to keep the Hughes & Kettner Grandmeister running cool and sounding great!

The Hughes & Kettner Rack Mounts:

Add the RM20 or RM40 rack mounts..
RM-20: TubeMeister 18, TubeMeister Deluxe 20
RM-40: TubeMeister 36, GrandMeister 36, TubeMeister Deluxe 40, GrandMeister Deluxe 40

You can puchase the fan only or add the rack mounts.
Select your option in the drop down list then add to cart.

Amp and rack case sold separately.

pdf iconRM20 and RM40 Installation Instructions

Airflow - 31 CFM
Noise - 20 dBA
3 Year Warranty

fan model SXT80

Procool HK40B Fans...

Procool model HK40B fans offer the most airflow for the 1U rack systems.
Blue LED's light up when the fan is on.
Airflow 5.2 CFM at 4000 RPM and Noise 16dBA per fan.

power supply

Power supply model # PSW-12V2A

Input: 100-240 VAC

Output: 12VDC

AC plug type: NEMA 1-15P

DC Cable: 36 inch with 2.1mm barrel plug)

Fits in one rack space when plugged as shown

Panel Size: (1U) 19" x 1.75" x 1.5"
Panel color/material: black/metal
Fans: 6 - SL40B Blue LED fans
Fan Size: 40mm x 40mm x 20mm
Fan Speed: 4000 RPM
Air Flow: 31.2 CFM
Noise: 20 dBA
Bearings: Rifle Bearing
Fan Thermistor wire length: n/a
Controller Thermal Probe length: n/a
Power Supply: 100-240 VAC - 12 VDC
Power Supply Cable length: 36"
Power Supply Plug Type: NEMA 1-15P
Current draw: 1.5A
Power consumption: 4.5w
Grills/Guards: Black Wire

Installation Instructions

Mount the fan above the Grandmeister blowing in across the top of the amp. Connect the power supply to the fan panel with the mating plugs. Connect the power supply to AC power. The power supply accepts from 100 to 240VAC.

To mount the rack ears on the Grandmeister or Tubemeister remove the specified screws shown on the instruction sheet. Install rack mounts using the same screws.

Operating Instructions

Power the fan on. Power on the Grandmeister. Crank it up. Play hard!

Care and Maintenance

To maintain optimal performance, keep the fans clean. Canned air works well. If the fans are used outdoors or in a dusty environment is recommended to clean the fan blades as needed to keep clean.


The fan will not start:

1. Check the power connections.
2. Is the light on the power switch on? If not check power. If on and the fans are not spinning see #3.
3. Turn the fan blade by hand to see if they are stuck. They should be free moving. If this starts the fan it is likely the fans need maintenance.

The fan is making noise:

1. Check for anything that could be rubbing against the fan blade.
2. Make sure the fan blades are clean. Dirty fan blades can make noise.

If the above steps do not solve the problem, contact our friendly customer service for assistance.

Customer Reviews

4 / 4 Reviews

Reviewed By: Chris on March 15th 2019

Superb silent fan and my GrandMeister stays cool in the flight case. It also looks cool. Shipping to Netherlands worked out great. 5 stars!!!!

Reviewed By: James on Jan 27th 2019

Received my fan and rack mounts in 2 days! I got the mounts for my TubeMeister 36 and they fit perfectly and very easy to install. I mounted the fan in my rack just above the TubeMeister as instructed and it works great! The whole rack stays cool. The blue lights match the TubeMeister perfectly and look very cool. So far I've gotten many compliments on my new set up. Thanks Hughes & Kettner and Procool for making great stuff!!! Can I give 10 stars?

Response from Procool:

Thank you for the great review! Yes, you can leave 10 stars. + On behalf of Hughes & Kettner we thank you for your business!

Reviewed By: Jeff on Feb 13th 2018

Great fan! Very quiet and keeps my GrandMeister cool. Looks great too.

Reviewed By: Matt on Feb 9th 2018

Keeps my new GrandMeister Deluxe 40 cool and is absolutely silent. 5 Stars!!!!!

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Frequently purchased with this item

C14 adaptor cable

Converts NEMA 5-15R to IEC320 C14
Use to connect all Procool power supplies to C13 receptacle.
Length = 12 inches
Part No. PSA-C14

EU plug adaptor

Converts US or EU plug to fit Australian outlets
Part no. PSA-AU

AU plug adaptor

Converts US and UK plug to fit European outlets
Part no. PSA-EU