Connect with us

Hi, what are you looking for?

New Products

Leema Acoustics’ Quantum Line Neutron Preamp/DAC and Graviton Power Amp Deliver An Affordable System Solution

Leema Acoustics makes its case for stereo separates. The new Quantum series combo is £2,800 and made in the U.K.

Leema Acousitcs Graviton Power Amplifier and Neutron Pre-Amplifier in Silver and Black Stacked Lifestyle

Leema Acoustics is a smaller UK-based brand that has been manufacturing high-end audio for almost 25 years and whilst it does not have a huge following here in North America, things are hopefully about to change. If you are looking for a more affordable path into better sound quality at home, their products most certainly merit a listen.

Tip: Although Leema started with loudspeakers, they are not currently part of their product mix.

The Quantum Collection

Building on its success, Leema Acoustics has announced the first two entries in its new Quantum Collection, the Neutron Preamp/DAC, and Graviton Power Amp.

Note: Leema Acoustics has not posted official product pages for the Quantum Collection as the publication date of the article.  

The Quantum collection is the first new Leema Acoustics range in over a decade and has been entirely designed, engineered, and built in the Welshpool factory in Powys, Wales, overseen by Leema Acoustics’ co-founder and ex-BBC sound engineer, Lee Taylor.

The Quantum line borrows from Leema’s flagship Constellation Series and has been repackaged to improve affordability. The casework is simpler, single transformers replace multi-transformers, and the board assembly has been simplified with no loss of component quality.

The circuit boards are manufactured at Leema’s UK factory, which controls quality at a targeted price point. The majority of the PCB (Printed Circuit Board) components are shared with the Constellation series allowing economies of scale to benefit the new Quantum range directly.

Neutron Preamp

Lemma Acoustics Quantum Series Neutron Preamp/DAC Silver Front Angle

The Neutron preamp is built on Leema Acoustics’ 25-year UK hi-fi manufacturing experience. The Neutron is designed to be an affordable audio ‘hub’. It provides as much transparency as possible while offering flexibility with 13 inputs. The Neutron introduces Leema Acoustics’ latest circuit designs, featuring reference-standard low crosstalk for enhanced transparency.

The Neutron offers a high-quality switchable MM/MC phono stage. The preamp also features an advanced asynchronous ESS 24-bit/192 kHz USB DAC, a dedicated headphone amplifier, plus a high-end Burr-Brown analog volume control.

Lemma Acoustics Quantum Line Neutron Preamp/DAC Silver Front/Rear

The Neutron also includes 13 assignable inputs: 

Outputs include:

Advertisement. Scroll to continue reading.

  • 1 x Fixed-level record
  • 2 x Subwoofer
  • 1 x Headphone (high-quality dedicated headphone amp)
  • 1 x 12 V trigger.

Graviton Power Amp 

Lemma Acoustics Quantum Line Graviton Power Amp Silver Front/Rear

The core of the Leema Graviton stereo power amplifier is what they claim is the biggest toroidal power supply seen at its price point! This enables the amp to handle any room conditions and speakers you can through at it. 

The Graviton incorporates a Class A/B design, providing 150 watts per channel into 8 ohms and 260 watts into 4 ohms. For added support, the Graviton deploys six output transistors per channel for wide dynamic ability combined with unforced sonic detail. 

From Leema’s co-founder Lee Taylor: “Quantum takes much of the Leema Acoustics’ Constellation product design, yet simplified to meet a more affordable price point. However, no compromises have been made where it counts: The Neutron’s onboard phono stage is cloned directly from the award-winning Essentials Phono, USB is handled via an XMOS interface rather than the Leema M1 module, signal switching is via gold-palladium relays, not solid state, plus volume is regulated via an analog resistor ladder; Leema Acoustics has used this method for nearly 25 years…The Graviton has an over-specified single transformer supply and six matched Toshiba output transistors per channel, allowing high instantaneous current delivery for superior transient capability and long-term reliability. Dual speaker binding posts are included to allow easy bi-wiring, plus line level loop through-outputs for bi-amping.

Leema Acousitcs Graviton Power Amplifier and Neutron Pre-Amplifier in Black Stacked Front View

Finish Options

All Quantum-range devices incorporate UK-made casework in brushed black or silver finishes, with solid aluminum precision-machined front panels and control dials. 

Pricing and Availability

Both items can be bought together for £2,800, or individually at the following prices through authorized UK Dealers and Worldwide Distributors.

  • Leema Acoustics Neutron Pre-Amplifier – £1,500
  • Leema Acoustics Graviton Power Amplifier – £1,500

U.S. price and availability TBD.

Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *


You May Also Like


Our top 13 audiophile upgrades for 2023 feature a variety of affordable products that we've used all year and merit serious consideration.

New Products

Naim Audio makes a very subtle visual change to its 500 Series of high-end audio components as of October 2023.

Floorstanding Speakers

Rune Skov, Sales Director for Denmark’s ultra-luxe high-end audio brand, Gryphon Audio joins us on the podcast from T.H.E. Show 2023.


Monoprice's latest Monolith Series power amplifiers offer an affordable path for those looking to improve the sound quality of their home theater system.


Allen Sides of Ocean Way Audio and Alberto Guerra of AGD Productions join us to discuss their collaboration during T.H.E. Show 2023.

Floorstanding Speakers

Anthony Chiarella is the North American Director of Sales and Marketing for Denmark’s ultra-luxe high-end audio brand, Gryphon Audio Designs.

A/V Receivers & Preamp/Processors

AV preamp/processors offer superior connectivity and audio/video processing for home theater systems. What exactly do they offer? We explain.


Monitor Audio's Custom Installation Amplifiers 2G offer a wide range of power options for multi-room and dedicated home theater systems.


ecoustics is a hi-fi and music magazine offering product reviews, podcasts, news and advice for aspiring audiophiles, home theater enthusiasts and headphone hipsters. Read more

Copyright © 1999-2024 ecoustics | Disclaimer: We may earn a commission when you buy through links on our site.

SVS Bluesound PSB Speakers NAD Q Acoustics RSL Speakers ProjectorScreen Focal Naim Audio Cambridge Audio