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Dr. Z Jaz 20/40 40-Watt 1x12" Guitar Combo

Dr. Z Jaz 20/40 40-Watt 1x12" Guitar Combo

$2,199.00 Price Tier: High-end

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Page last updated Mar 05, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated March 5, 2026.

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Price

$2,199.00 2 available Used

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Average Price: $2,199

High-end/Boutique

$300

$701+

Price Tier

In the Combo Guitar Amplifiers category, Dr. Z Jaz 20/40 40-Watt 1x12" Guitar Combo is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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Standard

High-end

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Description

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The Dr. Z Jaz 20/40 40-Watt 1x12" Guitar Combo is a versatile powerhouse designed to meet the demands of any gigging musician. This combo amplifier delivers the perfect blend of vintage warmth and modern clarity, making it an ideal choice for blues, jazz, and rock guitarists who crave tonal variety. With its selectable power output of 20 or 40 watts, you can effortlessly transition from intimate club settings to larger venues without compromising on sound quality.

The amplifier's single 12" speaker delivers a balanced, rich sound with impressive projection and definition. The Jaz 20/40 is equipped with an all-tube design, ensuring that your guitar's voice is captured with authenticity and warmth. Its unique post-phase inverter master volume allows for nuanced control over your sound, giving you the flexibility to craft your tone with precision.

This amp doesn't just sound great; it offers practical features that make it a reliable companion for any gig. The built-in effects loop provides seamless integration with your pedalboard, while the dual footswitchable channels allow you to switch between clean and overdriven tones with ease. Whether you're dialing in smooth, jazzy cleans or gritty overdrives, the Dr. Z Jaz 20/40 delivers consistent performance every time.

Key Features:

Selectable power output: 20 or 40 watts
All-tube design for authentic tone
1x12" speaker configuration
Unique post-phase inverter master volume
Built-in effects loop
Dual footswitchable channels

Product specs

Brand	Dr. Z
Model	Jaz 20/40 40-Watt 1x12" Guitar Combo
Finish	Various
Year	2009 - 2011
Made In	United States
Categories	Guitar Combo Amps
Built-In Effects	Built-In Effects
Electronics	Tube
Number of Channels	1 Channel
Number of Inputs	1 Input
Output Power (Watts)	40
Power Tube Type	6V6
Reverb	Spring Reverb
Speaker Configuration	1x12"

FAQs

What type of tubes does the Dr. Z Jaz 20/40 use?: The Dr. Z Jaz 20/40 is equipped with 6V6 power tubes, which are known for delivering a warm, smooth tone with a classic American sound.
Is the Dr. Z Jaz 20/40 loud enough for live performances?: Yes, with a power output of 40 watts, the Dr. Z Jaz 20/40 is capable of providing ample volume for live performances, especially in small to medium-sized venues.
Does the Dr. Z Jaz 20/40 have built-in reverb?: Yes, the Dr. Z Jaz 20/40 features a built-in spring reverb, offering rich and natural reverb tones for added depth to your sound.
How many channels does the Dr. Z Jaz 20/40 have?: The Dr. Z Jaz 20/40 is a single-channel amplifier, focusing on delivering a pure and straightforward tone.
What is the speaker configuration of the Dr. Z Jaz 20/40?: The Dr. Z Jaz 20/40 features a 1x12" speaker configuration, providing a balanced and full sound that suits a wide range of musical styles.

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Dr. Z Jaz 20/40 40-Watt 1x12" Guitar Combo.

Features and functionality

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Owners appreciate the Dr. Z Jaz 20/40's front-mounted controls, allowing easy access and adjustment when the amp is positioned on a tilt.
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The Jaz 20/40 is praised for its ability to sound excellent at lower volumes, which is beneficial for those who cannot always play at high volume levels.
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The amp's master volume control is highlighted for its ability to provide a great sound without needing to be painfully loud.
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The Dr. Z Jaz 20/40 offers a favorable comparison to the Vox AC15, which excels in apartment settings with its breakup capability at lower volumes when using humbuckers.
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Comparisons

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Users note that the Dr. Z Jaz 20/40 combo can be converted into a head, offering flexibility to pair with various cab configurations like 2x12s or 2x10s.
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Some users indicate that the Dr. Z Jaz 20/40's tone is akin to a "Super Reverb on steroids," offering a robust sound with a killer tremolo and a half-wattage switch.
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Owners who have used both Dr. Z and other high-end brands like Matchless and Bad Cat often return to Dr. Z for its unique tonal characteristics that are hard to replicate.
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The Friedman Little Sister is praised for its build quality and sound over current Marshall models, with owners favoring it for smaller budgets or less ideal sound environments.
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Use cases and applications

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The Jaz 20/40's portability is highlighted, with the ability to easily carry it along with a guitar and pedalboard for quick setups.
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The Dr. Z Jaz 20/40 is recommended for its versatility in both home and gig settings, especially for genres like dad rock and classic rock.
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Value and pricing

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It's noted that combo amps like the Dr. Z Jaz 20/40 are often more affordable on the used market compared to separate heads and cabs due to shipping challenges.
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User experience

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Dr. Z owners report satisfaction with the amp's practicality, often preferring its compact, all-in-one design for gigging and home use.
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It's noted that the Dr. Z Jaz 20/40 can be incredibly loud, even at moderate settings, making it the loudest dual EL84 amp some users have experienced.
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Owners of the Dr. Z Jaz 20/40 find it appealing for its ability to achieve a "Super Reverb on steroids" tone, making it versatile for various rock styles.
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