# Lowther Loudspeakers

> Lowther is a British manufacturer (founded 1934) of handcrafted full-range
> loudspeaker drive units, horn-loaded and full-range loudspeakers, the PX4
> valve amplifier, phase plugs and cables. Lowther also publishes cabinet plans
> and supplies drive units for DIY builders, and offers refurbishment/upgrades.
> Canonical contact email: hello@lowtherloudspeakers.com

## Drivers & specs
- [Decoding Lowther Driver Data](https://www.lowtherloudspeakers.com/collection/decoding-lowther-driver-data): Full-range drive unit specifications, Thiele-Small parameters, free-air resonance (Fs) and driver-to-cabinet compatibility.
- [Concert Collection](https://www.lowtherloudspeakers.com/collection/concert): Classic full-range drive units (PM/DX/EX, Alnico, ceramic and neodymium).
- [PM6C](https://www.lowtherloudspeakers.com/collection/concert/pm6c): The PM6C ceramic-magnet full-range drive unit.
- [Sinfonia Collection](https://www.lowtherloudspeakers.com/collection/sinfonia): Premium-diaphragm full-range drive units.
- [Philharmonic Collection](https://www.lowtherloudspeakers.com/collection/philharmonic): Lowther's most refined drive units.
- [Grand Opera Collection](https://www.lowtherloudspeakers.com/collection/grand-opera): Bespoke, commission-only drive units.

## DIY & plans
- [Build Your Own Lowther](https://www.lowtherloudspeakers.com/build-a-lowther): DIY speaker kits, official cabinet plans (Acousta, Bicor, Accolade, Academy) and matched drive units.

## Amplification
- [PX4 Valve Amplifier](https://www.lowtherloudspeakers.com/ensemble/px4-amplifier): Handcrafted Class-A PX4 valve amplifier, push-pull or single-ended.

## Phase plugs & accessories
- [Phase Plugs](https://www.lowtherloudspeakers.com/ensemble/phase-plugs): What a phase plug is and Lowther's Standard Dome, Phase Equaliser and Sound Diffuser.
- [Reference Cables](https://www.lowtherloudspeakers.com/ensemble/reference-cables): Lowther reference cables.

## Loudspeakers
- [Loudspeakers overview](https://www.lowtherloudspeakers.com/products): The full range of handcrafted Lowther loudspeakers.
- [Edilia](https://www.lowtherloudspeakers.com/loudspeakers/edilia)
- [Almira](https://www.lowtherloudspeakers.com/loudspeakers/almira)
- [Acousta 117](https://www.lowtherloudspeakers.com/loudspeakers/acousta-117)
- [Acousta Quarter Wave](https://www.lowtherloudspeakers.com/loudspeakers/acousta-quarter-wave)
- [Audiovector](https://www.lowtherloudspeakers.com/loudspeakers/audiovector)
- [Hegeman](https://www.lowtherloudspeakers.com/loudspeakers/hegeman)
- [Voigt Horn](https://www.lowtherloudspeakers.com/loudspeakers/voigt-horn)
- [TP2](https://www.lowtherloudspeakers.com/loudspeakers/tp2)

## Heritage
- [History](https://www.lowtherloudspeakers.com/history): What Lowther does, and the Paul Voigt / Donald Chave heritage since 1934.
- [Handcrafted](https://www.lowtherloudspeakers.com/brand/handcrafted): How Lowther products are made.
- [Lasting Legacy](https://www.lowtherloudspeakers.com/brand/lasting-legacy)
- [Donald Chave Era](https://www.lowtherloudspeakers.com/brand/donald-chave-era)
- [Our Craft](https://www.lowtherloudspeakers.com/brand/our-craft)

## Services
- [Refurbishments & Upgrades](https://www.lowtherloudspeakers.com/services/refurbishments-upgrades): Re-coning, re-gapping and upgrading Lowther drive units; break-in guidance.
- [Listening Rooms](https://www.lowtherloudspeakers.com/services/listening-rooms): Auditioning Lowther loudspeakers.
- [OEM Opportunities](https://www.lowtherloudspeakers.com/services/oem-opportunities)

## FAQs
- [Frequently Asked Questions](https://www.lowtherloudspeakers.com/faqs): Answers about Lowther loudspeakers, full-range drive units, the PX4 amplifier, phase plugs, building your own, refurbishments, buying and heritage.

## Contact
- [Contact & Pricing](https://www.lowtherloudspeakers.com/contact): Email hello@lowtherloudspeakers.com, phone +44 20 8300 9166, and how Lowther pricing/quotes work.
- [Book an Appointment](https://www.lowtherloudspeakers.com/book-appointment)