Deals

Equipboard helps you discover, compare, and find the right gear for your sound.

Sign up Log in

Artist or band Music gear Music gear to an artist Report a duplicate

Contact us About Merch store

© Equipboard Inc.

Hughes & Kettner Quantum QC421 main image

Hughes & Kettner Quantum QC421

Hughes & Kettner Quantum QC421

See more

0 wishlisted

1 saved

Page last updated Feb 15, 2026

Pricing and availability

Store

Reviews

Price

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

The Hughes & Kettner Quantum QC421 is a formidable addition to any bassist’s gear arsenal, offering a blend of power and precision that’s hard to beat. Designed for both stage and studio, this bass combo amplifier is part of Hughes & Kettner's acclaimed Quantum series, known for delivering pristine sound clarity with every note.

Featuring a solid-state design, the QC421 ensures a robust low-end response without compromising on versatility. Its intuitive control panel allows for effortless sound shaping, making it suitable for jazz, rock, and everything in between. The integrated compression feature helps maintain tonal consistency across the frequency spectrum, ensuring that every pluck or slap is heard with clarity.

The QC421 also includes a DI output, making it a breeze to connect directly to PA systems or recording equipment, while the headphone output is perfect for silent practice sessions. With its rugged construction, this amplifier is built to withstand the rigors of touring, ensuring reliability gig after gig.

Key Features:

Solid-state design for reliable performance
Pristine sound clarity with every note
Integrated compression for consistent tone
DI output for direct connection to PA systems
Headphone output for silent practice
Rugged construction for durability on the road

Reviews

Based on 0 Reviews and 0 Ratings

5 star

4 star

3 star

2 star

1 star

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Alternative Rock

More Hughes & Kettner Bass Combo Amplifiers

Fender Rumble 100 Bass Combo Amplifiers

Fender Rumble 100

$329.99 - $429.99

9 available stores

4.5 (69)

^# 1

in Bass Combo Amplifiers Rank

Who’s using this:

9 artists using

Fender Rumble 25 Bass Combo Amplifiers

Fender Rumble 25

$129.99 - $189.99

7 available stores

4.5 (50)

^# 2

in Bass Combo Amplifiers Rank

Who’s using this:

Alexander Pushnoy

6 artists using

Fender Rumble 200 Bass Combo Amplifiers

Fender Rumble 200

$536.48 - $677.00

9 available stores

4.5 (32)

^# 3

in Bass Combo Amplifiers Rank

Who’s using this:

8 artists using

Fender Rumble 500 Bass Combo Amplifiers

Fender Rumble 500

$399.00 - $706.85

9 available stores

5.0 (41)

^# 4

in Bass Combo Amplifiers Rank

Who’s using this:

CHRIS PATTERSON

2 artists using

Orange Crush Bass 100 Bass Combo Amplifiers

Orange Crush Bass 100

$399.00 - $699.00

8 available stores

4.5 (16)

^# 5

in Bass Combo Amplifiers Rank

Who’s using this:

5 artists using

Fender Rumble 40 Bass Combo Amplifiers

Fender Rumble 40

$229.99 - $319.00

9 available stores

4.5 (40)

^# 6

in Bass Combo Amplifiers Rank

Who’s using this:

Markbass Mini CMD 121P Bass Combo Amplifiers

Markbass Mini CMD 121P

$825.00 - $949.99

7 available stores

5.0 (11)

^# 7

in Bass Combo Amplifiers Rank

Who’s using this:

3 artists using

Ampeg BA115 Bass Combo Amplifiers

Ampeg BA115

$198.00

1 available store

4.5 (42)

^# 8

in Bass Combo Amplifiers Rank

Who’s using this:

Garry Williams Beers

5 artists using

Hartke Kickback KB15 Bass Combo Amplifiers

Hartke Kickback KB15

$749.99

3 available stores

5.0 (6)

^# 9

in Bass Combo Amplifiers Rank

Who’s using this:

Valentine Cuisinier

3 artists using

Fender Rumble Studio 40 Bass Combo Amplifiers

Fender Rumble Studio 40

$235.61 - $499.99

7 available stores

5.0 (8)

^# 10

in Bass Combo Amplifiers Rank

Who’s using this:

Justin Meldal-Johnsen

Grace VanderWaal

2 artists using

Fender Rumble 15 Bass Combo Amplifiers

Fender Rumble 15

$48.60 - $109.99

4 available stores

4.0 (38)

^# 11

in Bass Combo Amplifiers Rank

Who’s using this:

Hartke HD25 Bass Combo Amplifiers

Hartke HD25

$151.00 - $199.99

5 available stores

4.5 (6)

^# 12

in Bass Combo Amplifiers Rank

Who’s using this:

2 artists using

Fender Rumble V1 100 Bass Amp Bass Combo Amplifiers

Fender Rumble V1 100 Bass Amp

$389.99 - $429.99

6 available stores

4.0 (15)

^# 13

in Bass Combo Amplifiers Rank

Who’s using this:

Fender Rumble 15 V2 Bass Combo Amplifiers

Fender Rumble 15 V2

$74.99 - $99.99

2 available stores

5.0 (4)

^# 14

in Bass Combo Amplifiers Rank

Who’s using this:

Fender Rumble 25W 1x8" Bass Combo Amplifier Bass Combo Amplifiers

Fender Rumble 25W 1x8" Bass Combo Amplifier

$129.99 - $164.93

4 available stores

4.5 (16)

^# 15

in Bass Combo Amplifiers Rank

Ampeg Rocket Bass RB-110 1x10" 50-watt Bass Combo Amp Bass Combo Amplifiers

Ampeg Rocket Bass RB-110 1x10" 50-watt Bass Combo Amp

$279.00 - $299.99

6 available stores

5.0 (1)

^# 16

in Bass Combo Amplifiers Rank

Who’s using this:

Jonny Greenwood

2 artists using

Fender Rumble 40 V3 Bass Combo Amplifiers

Fender Rumble 40 V3

$229.99 - $309.99

7 available stores

4.5 (16)

^# 17

in Bass Combo Amplifiers Rank

Fender Rumble 100 1x15 Bass Combo Amplifiers

Fender Rumble 100 1x15

$389.99 - $429.99

6 available stores

5.0 (1)

^# 18

in Bass Combo Amplifiers Rank

Who’s using this:

2 artists using

Fender Rumble 500 V3 2x10 500W Bass Combo Amp Ivory Bass Combo Amplifiers

Fender Rumble 500 V3 2x10 500W Bass Combo Amp Ivory

$679.99 - $789.99

6 available stores

5.0 (1)

^# 19

in Bass Combo Amplifiers Rank

Hartke HD15 Bass Combo Amplifiers

Hartke HD15

$105.00 - $213.78

5 available stores

4.0 (4)

^# 20

in Bass Combo Amplifiers Rank

Who’s using this:

Markbass Minimark 802 Bass Combo Amplifiers

Markbass Minimark 802

$589.04 - $899.99

5 available stores

4.0 (2)

^# 21

in Bass Combo Amplifiers Rank

Who’s using this:

Indro Hardjodikoro

3 artists using

Markbass Micromark 801 60-watt 1 x 8-inch Combo Amplifier Bass Combo Amplifiers

Markbass Micromark 801 60-watt 1 x 8-inch Combo Amplifier

$329.00 - $499.99

3 available stores

^# 22

in Bass Combo Amplifiers Rank

Markbass CMD JB Players School 200W 1x15 Bass Combo Amp Black Bass Combo Amplifiers

Markbass CMD JB Players School 200W 1x15 Bass Combo Amp Black

$554.00 - $769.99

6 available stores

4.5 (3)

^# 23

in Bass Combo Amplifiers Rank

Who’s using this:

Justin Rissmiller

Ampeg BA108V2 Bass Combo Amplifiers

Ampeg BA108V2

$190.30

1 available store

4.5 (30)

^# 24

in Bass Combo Amplifiers Rank

Who’s using this:

Fender Rumble LT 25 Bass Combo Amplifiers

Fender Rumble LT 25

$199.00 - $249.99

8 available stores

4.5 (9)

^# 25

in Bass Combo Amplifiers Rank

Markbass CMD 102P Bass Combo Amplifiers

Markbass CMD 102P

$899.00 - $1,156.23

3 available stores

5.0 (8)

^# 26

in Bass Combo Amplifiers Rank

Who’s using this:

5 artists using

Ampeg RB-210 Bass Combo Amplifiers

Ampeg RB-210

$625.86 - $749.99

7 available stores

4.5 (3)

^# 27

in Bass Combo Amplifiers Rank

Who’s using this:

Orange Crush Bass 50 1x12 Bass Combo Amplifiers

Orange Crush Bass 50 1x12

$249.00 - $399.00

5 available stores

4.5 (10)

^# 28

in Bass Combo Amplifiers Rank

Ampeg RB-115 Bass Combo Amplifiers

Ampeg RB-115

$455.78 - $639.00

7 available stores

5.0 (2)

^# 29

in Bass Combo Amplifiers Rank

Who’s using this:

Gallien Krueger MB 115 Bass Combo Amplifiers

Gallien Krueger MB 115

$949.00

4 available stores

4.0 (5)

^# 30

in Bass Combo Amplifiers Rank

Who’s using this:

3 artists using

Orange Crush 25BX Bass Combo Amplifiers

Orange Crush 25BX

$165.00 - $249.00

8 available stores

4.0 (10)

^# 31

in Bass Combo Amplifiers Rank

markbass cmd jb players school combo Bass Combo Amplifiers

markbass cmd jb players school combo

$554.00 - $769.99

7 available stores

5.0 (4)

^# 32

in Bass Combo Amplifiers Rank

Fender Bass Studio 200 Watt Bass Combo Amplifiers

Fender Bass Studio 200 Watt

$536.48 - $795.00

7 available stores

5.0 (4)

^# 33

in Bass Combo Amplifiers Rank

Gallien-Krueger MB 115-II Bass Combo Amplifiers

Gallien-Krueger MB 115-II

$34.00 - $949.00

6 available stores

4.5 (8)

^# 34

in Bass Combo Amplifiers Rank

Peavey Max 100 Bass Combo Amplifiers

Peavey Max 100

$299.99

6 available stores

5.0 (1)

^# 35

in Bass Combo Amplifiers Rank

Who’s using this:

Ampeg BA-210v2 Bass Combo Amplifier Bass Combo Amplifiers

Ampeg BA-210v2 Bass Combo Amplifier

$325.00

1 available store

4.5 (33)

^# 36

in Bass Combo Amplifiers Rank

Fender Rumble Stage 800 Bass Combo Amplifiers

Fender Rumble Stage 800

$869.00 - $1,199.99

9 available stores

5.0 (4)

^# 37

in Bass Combo Amplifiers Rank

Ampeg BA115 V2 Bass Combo Amplifiers

Ampeg BA115 V2

$625.36

1 available store

4.5 (19)

^# 38

in Bass Combo Amplifiers Rank

Who’s using this:

Markbass Micromark 801 Bass Combo Amplifiers

Markbass Micromark 801

$308.00 - $1,030.00

7 available stores

3.0 (2)

^# 39

in Bass Combo Amplifiers Rank

Who’s using this:

2 artists using

Gallien-Krueger MB210-II 500W 2X10 Ultralight Bass Combo Amp Bass Combo Amplifiers

Gallien-Krueger MB210-II 500W 2X10 Ultralight Bass Combo Amp

$990.00 - $1,149.00

6 available stores

5.0 (10)

^# 40

in Bass Combo Amplifiers Rank

See also: Bass Combo Amplifiers, Hughes & Kettner, Hughes & Kettner Bass Combo Amplifiers

Artist usage

Add artist usage

Community setups

Similar

Add recommendation

Most Popular Bass Combo Amplifiers

Added to Equipboard on 02-16-2019 by

crayfishofficial

Gear IQ 85