---
product_id: 92006590
title: "PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister"
brand: "procool"
price: "$306.77"
currency: USD
in_stock: true
reviews_count: 1
url: https://www.desertcart.ec/products/92006590-procool-hk640b-rm40-1u-rack-mount-intake-led-fan-designed
store_origin: EC
region: Ecuador
---

# 6 vibrant blue LED fans Ultra-quiet 20 dBA noise level 31 CFM airflow intake PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister

**Brand:** procool
**Price:** $306.77
**Availability:** ✅ In Stock

## Summary

> ❄️ Cool your tone, not your vibe.

## Quick Answers

- **What is this?** PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister by procool
- **How much does it cost?** $306.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/92006590-procool-hk640b-rm40-1u-rack-mount-intake-led-fan-designed)

## Best For

- procool enthusiasts

## Why This Product

- Trusted procool brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek 1U Rack Design:** Fits perfectly in a single rack space, maximizing your gear setup with minimal footprint.
- • **Precision Cooling Power:** Delivers a robust 31 CFM airflow to keep your amp running flawlessly under pressure.
- • **Whisper-Quiet Operation:** At just 20 dBA, it cools without disrupting your creative flow or studio vibe.
- • **Eye-Catching Blue LED Glow:** Adds a modern, professional aesthetic to your rig that stands out on stage or in the studio.
- • **Custom Fit for Hughes & Kettner:** Specifically engineered for Grandmeister and Tubemeister amps, ensuring seamless integration.

## Overview

The PROCOOL HK640B-RM40 is a 1U rack mount intake fan designed exclusively for Hughes & Kettner Grandmeister and Tubemeister guitar amps. Featuring six blue LED fans, it delivers a powerful 31 CFM airflow while maintaining an ultra-quiet 20 dBA noise level. Its sleek design includes RM-40 mounts for easy installation, ensuring your tube amp stays cool and performing at its best with a stylish edge.

## Description

Buy PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister: Rack Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Amazing!! - Works amazing just like it should!

## Features

- For Hughes & Kettner Tubemeister and Grandmeister rack mount amps
- 1U One rack space Fan and (4U) Four rack space mounts for Grandmeister | 6 Blue LED Quiet fans
- Airflow = 31 CFM (INTAKE) Noise = 20 dBA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07HR3PYSS |
| Amplifier Type | Tube |
| Brand | PROCOOL |
| Color | Black |
| Compatible Devices | Guitar |
| Connector Type | 6.35mm Jack |
| Customer Reviews | 5.0 out of 5 stars 7 Reviews |
| Item Dimensions D x W x H | 1.75"D x 19"W x 1.5"H |
| Item Height | 1.75 inches |
| Item Weight | 2.4 Pounds |
| Manufacturer | PROCOOL |
| Model Name | PROCOOL |
| Output Channel Quantity | 1 |
| Output Wattage | 4.5 Watts |
| Power Source | Corded Electric |
| Product Dimensions | 1.75"D x 19"W x 1.5"H |
| Warranty Description | 3 Year limited warranty |

## Product Details

- **Brand:** PROCOOL
- **Color:** Black
- **Compatible Devices:** Guitar
- **Output Wattage:** 4.5 Watts
- **Product Dimensions:** 1.75"D x 19"W x 1.5"H

## Images

![PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister - Image 1](https://m.media-amazon.com/images/I/41gdxVNJyAL.jpg)
![PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister - Image 2](https://m.media-amazon.com/images/I/51Xd+-Cx6LL.jpg)
![PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister - Image 3](https://m.media-amazon.com/images/I/6156TP6yyhL.jpg)
![PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister - Image 4](https://m.media-amazon.com/images/I/618O68pjvsL.jpg)
![PROCOOL HK640B-RM40 / 1U Rack Mount Intake LED Fan Designed for Hughes & Kettner Grandmeister and Tubemeister Guitar Amps - Includes RM-40 Rack Mounts for The Grandmeister - Image 5](https://m.media-amazon.com/images/I/61CG8JPkhhL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing!!
*by B***T on May 4, 2019*

Works amazing just like it should!

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ec/products/92006590-procool-hk640b-rm40-1u-rack-mount-intake-led-fan-designed](https://www.desertcart.ec/products/92006590-procool-hk640b-rm40-1u-rack-mount-intake-led-fan-designed)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-07*