EternalArts Audio Laboratorium

About EternalArts

EternalArts was founded in 2004 by Dr. Burkhardt Schwäbe and manufactures high-end audio components in small series at its Hannover-Isernhagen site, including the transformerless tube amplifier OTL MkIII, the phono preamplifier HLP Phono MkII, the DVB-S audio satellite tuner DT with tube output stage, the headphone amplifier KHV and the turntable motor control TMC. Production is carried out as a circuit-board-based assembly with selected components; housings are made from powder-coated sheet steel with high-gloss acrylic front panels and nickel-plated metal parts, and printed circuit boards feature 70 µm gold-plated copper traces. A second core competency is the repair and restoration of classic audio components, in particular tape machines from Revox and Studer as well as devices from McIntosh and Sennheiser. Out-of-stock spare parts such as housings, power transformers, glass front panels, RF filters, circuit boards and markings are reproduced in the laboratory. As an authorized Revox sales and service partner, the company also sells the B77 Mk III and performs service and warranty work. Since 2009, the company has used a factory building in Hannover-Isernhagen-Süd with laboratory, production and warehouse.

Site

Hannover-Isernhagen

Processes

Small-series production of audio electronics (e.g. DVB-S audio satellite tuner DT with, Repair and restoration of high-quality classic audio components (tape machines, amplifiers,, Reproduction of out-of-stock spare parts: housings, power transformers, glass front panels,, Manufacture of own audio components (tube amplifier OTL MkIII, preamplifier HLP Phono MkII,, Expert assessments and evaluation of consumer electronics devices (publicly appointed and, Repair and restoration of classic tape machines and audio components, Sales of authorized Revox products (B77 Mk III) including service and warranty work, Manufacture of tube amplifiers (OTL MkIII, preamplifier HLP Phono MkII)

Materials

Sheet steel (powder-coated), Acrylic (high-gloss front panel), Nickel (nickel-plated stand feet and knobs), Copper (70µ gold-plated traces on circuit boards), Acrylic, Nickel (nickel-plated), Copper (gold-plated), Glass

Founded

2004

Industries

High-end audio / consumer electronics, Analog sound engineering / tape recording

1. 01

   Design and circuit development (engineering)

2. 02

   Procurement of selected components

3. 03

   Circuit-board-based assembly and population

4. 04

   Housing production (sheet steel, acrylic front panel)

5. 05

   Final production, final inspection and test run

6. 06

   Sales, service and restoration

Materials and Processes

Sites

Hannover-Isernhagen

DE

Laboratory, production, warehouse, sales

Lot size

Small series

Materials

Sheet steel (powder-coated), acrylic, nickel, copper (gold-plated traces), glass

Manufacturing and Restoration Services

Inside the production

Processes & technical limits

History

1. 2004

   Foundation of EternalArts by Dr. Burkhardt Schwäbe

2. 2007

   Introduction of the EternalArts brand; realization of an OTL tube power amplifier based on Julius Futterman

3. 2008

   Dr. Schwäbe appointed by the Hanover Chamber of Commerce (IHK Hannover) as a publicly appointed and sworn expert for consumer electronics

4. 2009

   Relocation to a factory building in Hannover-Isernhagen-Süd (laboratory, production, warehouse)

5. 2024

   Test of the OTL Mk III in HiFi Statement; factory visit by the Analogue Audio Association

6. 2026

   Official service partnership with Revox; presentation of the Commemorative Edition of the OTL MkIII (test in image hifi 2/2026); appearance at the North German HiFi Days Hamburg