Pricing and availability

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Average Price: $885

High-end/Boutique

$300

$701+

Price Tier

Budget

Standard

High-end

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Description

Elevate your sound with the Supro 1675RT Rhythm Master, a versatile combo amp that brings the legendary tone of its predecessors into the modern age. This powerhouse marries all-tube spring reverb and power tube tremolo with the flexibility of switchable Class A / Class AB wiring, offering unmatched sonic versatility. Whether you're crafting delicate melodies or roaring riffs, the independent bass and treble controls ensure your tone remains uniquely yours. Perfect for musicians seeking depth and clarity in their sound, the Rhythm Master stands as a testament to Supro's commitment to quality and innovation.

Key Features:

  • All-tube spring reverb for lush, organic soundscapes
  • Power tube tremolo adds a warm, pulsating effect to your tone
  • Switchable Class A / Class AB power amp wiring for tonal versatility
  • Independent bass and treble controls for precise sound shaping
  • Inherits the revered tone and functionality of the S6420+ Thunderbolt Plus

Product specs

Brand Supro
Model 1675RT Rhythm Master
Finish Blue Rhino
Year 2015 - 2025
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) 60
Power Tube Type 5881
Reverb Spring Reverb
Speaker Configuration 1x15"

FAQs

What type of tubes are used in the Supro 1675RT Rhythm Master amplifier?

The Supro 1675RT Rhythm Master amplifier uses 5881 power tubes, known for their robust and dynamic sound, making it suitable for a variety of playing styles.

How many channels does the Supro 1675RT Rhythm Master have?

The Supro 1675RT Rhythm Master features a single channel, providing a straightforward and focused tonal experience.

Does the Supro 1675RT Rhythm Master have built-in effects?

Yes, the Supro 1675RT Rhythm Master includes built-in effects, featuring a classic spring reverb to enhance your sound.

What speaker configuration does the Supro 1675RT Rhythm Master use?

The Supro 1675RT Rhythm Master is equipped with a 1x15" speaker configuration, offering a rich and full-bodied sound.

Is the Supro 1675RT Rhythm Master suitable for live performances?

With an output power of 60 watts, the Supro 1675RT Rhythm Master is powerful enough for live performances, providing ample volume and clarity for gigs.

ProGuitarShopDemos

ProGuitarShopDemos

Supro 1675RT Rhythm Master 1x15 Combo

Video thumbnail for Supro 1675RT Rhythm Master 1x15 Combo by ProGuitarShopDemos

Supro 1675RT Rhythm Master 1x15 Combo

ProGuitarShopDemos

ProGuitarShopDemos

Video thumbnail for Supro 1675RT Rhythm Master 1x15 Tube Combo Amplifier Tone Report Demo by Andy Martin by SuproUSA

Supro 1675RT Rhythm Master 1x15 Tube Combo Amplifier Tone Report Demo by Andy Martin

SuproUSA

SuproUSA

Video thumbnail for Supro Rhythm Master Amplifier by Mike Hermans

Supro Rhythm Master Amplifier

Mike Hermans

Mike Hermans

Video thumbnail for Supro Rhythm Master 1675RT | Playthrough Demo by ChoptonesOfficial

Supro Rhythm Master 1675RT | Playthrough Demo

ChoptonesOfficial

ChoptonesOfficial

Reviews

PROS

  • Breaks up nicely at lower volumes on 35W setting

  • Bright, full-range sound without being shrill

  • Versatile tonestack, great for Blues/Rock

  • Onboard reverb and tremolo add lush, swampy character

  • Sufficient headroom for clean tones at gig volumes

  • Handles pedals well, especially at 35W setting

  • Organic, pleasing distortion quality

CONS

  • Heavier than expected at over 50 lbs

  • Onboard reverb not as impressive as Fender models

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Supro 1675RT Rhythm Master.

Features and functionality

  • The Supro Keeley Custom is designed as a pedal platform with no mid EQ adjustment and a cathode-biased 25-watt output, featuring a Creamback speaker with 97dB sensitivity.

    Source
  • The Blues King 12 includes an FX loop, absent in newer Delta King models, allowing for separate modulation and drive effects, crucial for some users' setups.

    Source

Comparisons

  • The Supro Blues King 12 and Keeley Custom 12 are distinct lines, with the former offering a '50s "tweed" sound and the latter serving as a clean canvas for pedals.

    Source
  • The Blues King 12 is favored over other amps like the Blues Jr and Orange Tiny Terror for its unique sound, especially when paired with a Tube Screamer.

    Source

User experience

  • Blues King 12 users appreciate its unique sound and prefer it with a Tube Screamer for enhanced tone, although they find the gain circuit lacking.

    Source
  • Some owners report the Blues King 12's gain circuit is lacking, recommending external pedals for better overdrive and tone shaping.

    Source

Value and pricing

  • Concerns are raised about Supro's specification claims, specifically regarding the power output of their amps, which some argue are overstated.

    Source
  • The Blues King 12 can be found used for less than $400, making it a more budget-friendly option compared to the Keeley Custom line.

    Source

Use cases and applications

  • The Blues King 12 appeals to those seeking a low-wattage amp with an FX loop for home use, offering versatile tones for blues and classic rock.

    Source
  • For those who prefer a low-watt amp for home use, the Blues King 12 offers versatile tones and is appreciated for its distinct sound profile.

    Source

Critic Reviews

Supro 1675RT Rhythm Master review | MusicRadar

musicradar.com

The Supro 1675RT Rhythm Master is a stunningly crafted amp that marries vintage charm with modern performance. Its robust construction and keen pricing make it a standout choice for musicians seeking quality and value. The amp delivers superb tone, with a straightforward setup free of unnecessary complexities. It shines particularly in blues settings, offering warm, gritty sounds perfect for Texas blues enthusiasts. The onboard reverb and tremolo add depth, making it versatile for various styles. Despite its single channel, the amp's sound quality and ease of use outweigh any potential downsides.

positive

5.0 out of 5

Based on 1 Review and 1 Rating

5 star
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1 star
shoebird

Where is the 6th Star?

This amp is amazing. Pleasing, dirty, wild, soft... as you wish. I love the spring reverb and the tremolo is amazing - subtle on 35 Watts, crazy on 45/60 watts. It’s Alabama Shakes in-a-box, I mean in-an-amp. And when you crank the volume with a Tele - pure magic. And no - I‘m not a Jimmy Page fanboy. But a Supro-fanboy? Definitely yes.

Artist usage

Add artist
See how Andy Martin uses Supro 1675RT Rhythm Master

Andy Martin

Guitarist

...
Verified via YouTube

In a YouTube demo by ProGuitarShopDemos, Andy Martin showcases the Supro 1675RT Rhythm Master. This 6L6-powered combo amplifier, featuring a custom 15-inch speaker and unique tube-powered reverb and tremolo, offers versatile tonal options. The video highlights the amp's ability to switch between Class-A and Class-AB operation, providing different wattage and tremolo characteristics. The collaboration with Eminence on the speaker design and its vintage-inspired features make it a standout choice for Martin.

Genre Usage

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

Used With

Based on how musicians on Equipboard use Supro 1675RT Rhythm Master, it is most commonly used with the following gear.

Pigtronix FAT Drive
Pigtronix FAT Drive Overdrive Effects Pedals
1

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