Founded in 2004 in Veldhoven, The Netherlands, Grimm Audio has built its reputation around loudspeakers, music streamers, and a careful approach to signal integrity. After introducing the PW1 phono preamplifier in 2025, the company is now expanding into power amplification with the PA1, a compact monoblock amplifier making its debut at High End Vienna 2026.
Rated at 200 watts into 4 ohms and 150 watts into 8 ohms, the PA1 gives Grimm Audio a dedicated amplification platform for systems built around its existing loudspeakers and streamers. It also marks an important step for the Dutch manufacturer as it continues to move beyond source components and active loudspeaker systems into a broader high-end audio lineup.
Grimm PA1: Compact Monoblock, Serious Output
At 9.8 x 9.8 x 9.4 inches, the Grimm Audio PA1 is compact by monoblock amplifier standards, but its 33-pound weight makes it clear that this is not a lightweight design.
The PA1 is rated at 200 watts into 4 ohms and 150 watts into 8 ohms, delivering that output to a single channel. That gives Grimm Audio’s first power amplifier enough power for a wide range of demanding loudspeakers, while keeping the design focused on control, stability, and low distortion rather than unnecessary bulk.
Grimm Audio says the PA1 uses a wide-bandwidth circuit architecture designed to reduce several forms of distortion, including phase modulation, thermal distortion, and residual crossover distortion. The amplifier also incorporates an Amplimo toroidal power transformer and a 90,000 µF current buffer, giving the compact chassis a more substantial power supply than its size might suggest.
Building on a traditional Class A/B amplifier topology, the PA1 uses symmetrical circuitry with 96 power transistors mounted on an aluminium printed circuit board. Grimm Audio says the aluminium PCB provides tight thermal coupling for the output devices, helping maintain stable operating conditions under load.
The output stage and driver stage are designed to work together to preserve the amplifier’s operating point, even when delivering substantial low-frequency current to a loudspeaker. That matters because bass demands can place significant stress on an amplifier’s power supply and output stage.
Although Grimm Audio describes the PA1 as combining some of the tonal qualities often associated with tube amplifiers with the control and stability expected from solid-state designs, the PA1 itself is a solid-state Class A/B monoblock amplifier. The company’s goal is clearly not nostalgia, but a compact amplifier that combines low distortion, current delivery, and thermal stability in a form factor that is smaller than many high-end monoblocks.
“We have developed a solid-state amplifier capable of achieving an extraordinary combination of transparency, control, and musical naturalness,” says Eelco Grimm, Creative Director of Grimm Audio.
PA1 Monoblock Amplifier Specs
| Grimm Audio Model | PA1 |
| Product Type | Compact Monoblock Amplifier |
| Price | Forthcoming |
| Balanced Design | Yes |
| Amplifier Type | Class A/B |
| Power Output | 150 watts @ 8 Ohms 200 watts @ 4 Ohms |
| Frequency Response | 0.1 Hz – 300 kHz |
| Cross-over Distortion Limitation | Yes |
| Coupling Capacitors | None |
| Protection Circuitry | Yes |
| Inputs | 1 x XLR 1 x RCA |
| Input Impedance | XLR – 33 kΩ. RCA -16 kΩ. |
| Output Impedance | <10 mΩ. |
| Gain | 26 dB or 18 dB (selectable) |
| Damping Factor | 800 re 8 Ω. |
| THD | <0.0001 % (1 W, 8 Ω) |
| SNR | 96dB (1W,8Ω) 118dB (150W,8Ω) |
| Speaker Connections | 1 x 4 mm banana-style binding posts |
| Auto on/off Function | Yes |
| Power Supply | >150 W in 8 Ω |
| Power Consumption (Operation) | 65 W ~ 600 W |
| Power Consumption (Low Power Mode) | <5 W |
| Dimensions (WDH) | 250 x 250 x 240 mm 9.8 x 9.8 x 9.4 inches |
| Weight | 15Kg / 33lbs |
The Bottom Line
The Grimm Audio PA1 is not trying to be an integrated amplifier, lifestyle hub, or feature-packed control center. It is a compact Class A/B monoblock built to do one job: drive one loudspeaker with 150 watts into 8 ohms or 200 watts into 4 ohms from a relatively small, very dense chassis.
What makes it interesting is the combination of size, output, thermal design, and Grimm’s use of a symmetrical circuit with 96 power transistors on an aluminium PCB. That is not a typical recipe for a compact monoblock, and it suggests Grimm is focused on bandwidth, low distortion, and stability rather than just building another large metal amplifier with handles and a mortgage application.
The catch is obvious: you need two PA1 amplifiers for a stereo system, and Grimm has not announced pricing yet. Until that number lands, It is hard to know whether the PA1 will compete more directly with compact, high-performance monoblocks from Bel Canto and Benchmark, or with larger and more expensive designs from Bryston, Pass Labs, Michi, and others. Either way, the PA1 looks like a serious first amplifier from Grimm Audio, but the price will decide whether it is merely impressive or genuinely disruptive.
Price & Availability and Price
The release date and pricing for the PA1 have not been provided as of the publication date of this report, but in the meantime, it is being shown and demonstrated for the first time at Vienna High End 2026 in Grimm Audio’s demo space Hall X4, M01.
More information about the PA1 can be found on Grimm Audio’s Official PA1 product page.
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