[IR-equipped 15W] Suhr PT15: A next-generation amplifier for home recording and professional recording

A groundbreaking guitar amplifier developed in collaboration with professional guitarist Pete Thorn.

Suhr PT15

The 15W output tube amplifier has a built-in reactive load and impulse response (IR) function, making it possible to record at home or practice in a quiet environment, which was difficult with conventional amplifiers.

In this article, we will thoroughly explain the Suhr PT15 IR's product specifications, features, sound quality, comparisons with other products, and actual user reviews.

We take a closer look at the capabilities of the "next-generation hybrid amplifier," which combines the rich sound of a vacuum tube amplifier with the convenience of digital technology.

Suhr PT15 | Specifications and Features

Basic information about the Suhr PT15

output	15W RMS (6V6GT x 2)
Number of Channels	3ch: CH1 Clean/Crunch, CH2 Overdrive, CH3 Lead
プリ管	12AX7×5
パワー管	6V6GT×2
Built-in IR	16 types (selected by Suhr/Pete Thorn) *User IRs can be added via USB
Reactive Loading	Fixed at 8 Ω (safe operation even without speaker connection)
Output terminal	SP OUT 4/8/16 Ω, LINE OUT (TRS balanced/unbalanced)
Input terminals	INST IN (front), AUX IN (stereo mini)
headphone	Stereo mini, IR/bypass switchable
FX Loop	Serial, with tube buffer (SEND/RETURN)
Footswitch	3 buttons included (CH switching + FX loop)
USB	For IR management and firmware updates
Dimensions/weight	Approx. 521 x 209 x 235 mm / Approx. 11.2 kg
Price (domestic)	Around 57 10,000 yen

Suhr PT15 | Features and Functions

The innovation of tube amp + IR integration

In the past, to record good sound from a tube amplifier and output it to a line, you had to use a separate power attenuator or IR loader (such as Two Notes or Suhr Reactive Load IR). However, the PT15 IRWorld's first "Built-in IR function for tube amplifier"We have integrated them into a single product.

By adding the cabinet and miking resonance with digital IR technology to the rich distortion and harmonic components produced by classic tube circuits, you can get the ideal mic'd sound anytime, anywhere. In fact, the manufacturer claims that it can "reproduce the best tube amp sound in any environment," and the convenience of being able to complete everything from home to the studio and stage with just one amp head is a major benefit for both professionals and amateurs.

Per-channel IR assignment

PT15 IR最大のユニーク機能が、チャンネル毎のIRデータ割り当てです。3つのチャンネルそれぞれに異なるキャビネットIRをプリセット可能で、例えば「CH1クリーンにはオープンバック2×12のFender系IR、CH2クランチにはVOX系2×12、CH3リードにはクローズドバック4×12のMarshall系IR」といった使い分けができます。

This flexibility was nearly impossible with analog equipment, and the optimal cabinet characteristics can be automatically applied from clean tones to high-gain leads, so you can make sounds as if you were changing amps and cabinets for each song. The 16 preloaded IRs include 6 custom IRs selected and created by Pete Thorn himself, and of course users can replace them with their favorite IRs. The way the IRs are instantly switched in conjunction with channel switching makes it seem as if "multiple famous cabinets are installed inside the amp," and it will be useful even in professional situations.

Headphone and AUX functions for convenient home practice

The PT15 IR is a reliable ally whether you're practicing at home or late at night. By inserting headphones into the headphone jack on the front of the unit and selecting IR, you can output realistic tube amp sound directly to the headphones even without connecting speakers.

Furthermore, by connecting a smartphone, audio player, or other audio source to the AUX input, you can mix the amp sound with the external sound source (such as the accompaniment or rhythm track of a song) and monitor it through headphones. This means that even in a quiet environment, you can enjoy the sound of the amp being fully driven while jamming or practicing along with your favorite songs.

The PT15 IR solves the problem of tube amplifiers, which is that you need to turn up the volume to get good sound, by using a reactive load, IR, and headphone output. Its ease of use is such that the official catchphrase, "The best partner for the bedroom," is no surprise.

Extensive connectivity and reliable design

The rear of the PT15 IR. In addition to the output terminal for the cabinet speaker (switchable between 4/8/16 Ω), it is equipped with an interface sufficient for professional use, such as an FX loop (SEND/RETURN), a foot switch terminal, a balanced/unbalanced line out (DI) terminal, an IR filter on/off switch, and a USB port. The built-in reactive load allows the amplifier itself to operate safely even when no speaker is connected.

With professional use in mind, the PT15 IR's rear panel is extremely well-equipped. The cabinet output supports 4Ω, 8Ω, and 16Ω, allowing you to drive any speaker you like, from a small combo to a four-speaker cabinet. The built-in reactive load circuit ensures that even if no speakers are connected, the amplifier is properly loaded, allowing it to operate safely without damaging the vacuum tubes. The line output supports balanced connections via 4/1-inch TRS terminals instead of XLR, allowing you to connect directly to a mixer or audio interface to send a high-quality DI signal. The sound has been described as "amazingly authentic, like a miked cabinet," and it can be sent directly to a PA during live performances or used for recording.Time-saving setup without a microphoneIt also has the expandability to allow firmware updates and IR data management via a USB port, making it a design that can be used for a long time with peace of mind.

Suhr PT15 | Sound demo

Suhr PT15 | Review and reputation

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Negative reputation

Suhr PT15 | Uncompromising "all-in-one" professional amplifier

The Suhr PT15 IR is the ultimate all-in-one guitar amp that combines the pure sound of a tube amp with advanced IR technology. With an easy-to-handle 15W output, it has Pete Thorn's outstanding tone from clean to high gain, and can be used for a wide range of purposes, from home recording and silent practice to live performance using line output. Although the initial investment is larger than other amps, it is worth it for its high level of completion and convenience, making it a dream piece of equipment that can do anything with just one unit. Professionals and serious guitarists will surely be satisfied with it. The Suhr PT1 IR is packed with the beauty of tube amps and digital technology, so if you have the opportunity, be sure to experience its sound and usability.