TL;DR: GRP Synthesizer has unveiled the A10, a 1.2-meter-wide semi-modular analog flagship with four VCOs, four filter types, and a routable analog effects section. Pre-orders close at Superbooth 2026 for €10,000, with retail price rising to €12,000 — and delivery likely slipping into Spring 2027.
- Four VCOs with hard sync, cross mod, super saws, FM, and ring mod feed into an 8-channel stereo mixer with multiple filter routing options.
- Four filter types: transistor ladder, state variable, 18dB lowpass diode, and lowpass vactrol — each with manual and CV control.
- Analog effects section includes dual voltage-controlled wavefolder, 1-second BBD stereo delay, dual triple resonators, VC dual phaser, and spring stereo reverb with two independent tanks.
- Sequencer offers 24-step capacity configurable as 8×3, 16+8, or 24 steps, with per-row step sorting and ratcheting options.
- Pre-order price is €10,000 + VAT; after Superbooth, retail jumps to €12,000 + VAT, with over 40 units already spoken for.
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The A10 Is Finally Here
Last year, after Superbooth 2025, GRP Synthesizer’s Paolo Groppioni teased a set of drawings for something called the A10. We at Noxal filed it under “intriguing vapourware” and went back to our coffee. But here we are, a year later, and the Italian workshop has produced actual photographs of a fully realized, hand-built monster synth. The A10 is real, it measures 1200 mm across — roughly the width of a small desk — and it is coming to Superbooth 2026 as a non-sounding pre-prototype.
This is not a minor iteration. The A10 is the new flagship, surpassing even the already massive A8. It is semi-modular, meaning you can patch freely but it also works as a complete instrument out of the box. GRP has confirmed that pre-orders will close at Superbooth next week, so if you have been sitting on a €10,000 decision, you are running out of time.
The Engine: Four VCOs and Filter Sorcery
The heart of the A10 is a semi-modular analog voice with four VCOs. These are not your grandmother’s oscillators. Each offers hard sync, cross modulation, gate reset, super saws, two forms of FM (linear and exponential), pulse width modulation, and ring modulation. There is also a sub-oscillator, noise generator, and external input. This feeds into an 8-channel stereo mixer that can route signals through multiple filter configurations.
The filter section alone is worth the price of admission — if you can afford the admission. You get four distinct filter types: a transistor ladder, a state variable filter, an 18dB lowpass diode filter, and a lowpass vactrol filter. Each has manual and CV-controllable cutoff and resonance. They can be arranged in series or parallel, overdriven at the input, and modulated from numerous sources including resonance itself. A wavefolder can be placed before or after the filters, bringing West Coast grit to what is otherwise an East Coast-leaning architecture.
Analog Effects That Actually Route
Here is where the A10 separates itself from the semi-modular pack: a fully routable analog effects section. This is not a slapped-on reverb chip. You get a dual voltage-controlled wavefolder (pre or post filter), a feature-rich 1-second BBD stereo delay with independent sync and modulation for each channel, dual triple resonators, a voltage-controlled dual phaser, and a spring stereo reverb with two independent tanks.
Having two spring tanks in a single synth is the kind of over-engineering we at Noxal appreciate. It means true stereo reverb from an analog source, not a pseudo-stereo sum. The effects can be routed flexibly through the signal path, giving you the kind of patch-programmability usually reserved for Eurorack systems. This is a studio centerpiece, not a live-performance toy.
The Sequencer: Hands-On and Deep
The left side of the A10 is dominated by a sequencer that occupies a large portion of the user interface. It offers three rows of eight steps, which can be configured as 8×3, 16+8, or a single 24-step sequence. Each row is independently configurable for step sorting order — including patterns like 1.3, 2.1, 1.3.5, 1.1.21, and 1.2.3.2 — and step repeat options including X2, *2, ratchet *3, ratchet *4, glide on/off, and legato on/off.
This is a powerful hands-on sequencer that rivals standalone hardware sequencers in flexibility. Pair it with the multimode arpeggiator, which can be assigned to upper and lower sections in split mode, and you have a composition tool that could keep you busy for years. I have spent entire weekends with far less capable sequencers.
Pricing, Availability, and Who Should Care
The GRP A10 is priced at €10,000 + VAT for pre-orders, with a €1,000 deposit and a second €2,000 payment due three months later. After Superbooth, the retail price jumps to €12,000 + VAT. GRP reports over 40 pre-orders already, meaning new orders placed now will likely not ship until Spring 2027. This is not a synth for the faint of wallet or the impatient.
Who is this for? Collectors, serious studios, and anyone who believes that a synthesizer should be a lifetime investment. The A10 is hand-built in Italy by a company that has been producing high-quality instruments for years. If you have the space, the budget, and the patience, this could be the last analog synth you ever buy. For the rest of us, there is always Superbooth to stare at it longingly.
Frequently Asked Questions
What makes the GRP A10 different from the A8?
The A10 is larger, with a 1.2-meter-wide chassis, four VCOs instead of two, four filter types instead of two, and a fully routable analog effects section including dual spring reverb tanks. It also includes a built-in 24-step sequencer that the A8 lacked.
Can the A10 be used without patching?
Yes. The A10 is semi-modular, meaning all internal connections are normalled out of the box. You can play it as a complete synthesizer without a single patch cable. Patch cables add flexibility but are not required for basic operation.
When will the A10 ship if I order now?
GRP estimates delivery by the end of 2026 for current pre-orders, but with over 40 units already on the list, new orders placed now will likely not ship until Spring 2027. A €1,000 deposit is required to secure a spot.
At Noxal, we believe that the best synthesizers are the ones that make you forget to check your email. The A10 looks like it will accomplish that — though at this price, you might want to check your bank balance first. I will be at Superbooth with a fresh espresso and a notebook, ready to stare at this thing for an uncomfortable amount of time.