Lundahl Transformers

Tibeliusgatan 7, 761 50 Norrtälje

Phone: +46 176 139 30

Fax: +46 176 139 35

October 2015

What could be the possible disadvantage to use LL1540 (line input transformer) as output transformer?

October 23rd, 2015|Products|

Click here to read the answer!

SIB15 – Hassle free connection of consumer audio sources

October 6th, 2015|News, Products|

The SIB15 – Stereo Isolator & Balancer is a new product from Lundahl Transformers, made on demand from our customers. This handy unit provides superior hum and buzz rejection when connecting portable audio sources (smartphones, laptops...) to professional sound systems. The two LL1532 transformers within the SIB15 guarantee a 10 Hz to 50 KHz bandwidth, [...]

September 2015


September 30th, 2015|Products|

The new small mains transformer LL2758 was designed in cooperation with Claus Byrith, for many years the head of the studio at the Royal Academy of Music in Aarhus. We have asked Claus to introduce the LL2758 transformer: ”The new mains transformer LL2758 is designed with the serious valve oriented audio enthusiast in mind. Its [...]

What is the sound difference between mu metal and amorphous core transformers?

September 16th, 2015|News, Products|

Many customers ask us for the difference in sound between our mu metal lamination transformers and our strip core amorphous transformers. We have forwarded the question to Kevin Carter at K&K Audio. Here are his impressions!

New interstage transformers!

September 2nd, 2015|News, Products|

During the last year Lundahl Transformers have developed a new line of Single-End to Single-End 1:1 interstage transformers. When conventional design practice is applied to this type of transformers you easily get destructive capacitive coupling between the primary and secondary windings. This will reduce the HF bandwidth and increase HF ringing. After a more thorough [...]

August 2015

Cable Factory DI-Pro with our LL1530 transformer.

August 15th, 2015|Products|

A nice (we think!) preliminary review of the Cable Factory DI-Pro with our LL1530 transformer. DI boxes are used e.g. when you connect your electric guitar to a microphone preamp input. Thank you! We look forward to the final review when the unit is fully tested. Click here to read the review

September 2014

New sub-page!

September 24th, 2014|Products|

A new sub-page, Products/Accessories presents our housings for tube OPTs, our new DIN unit for small isolation and splitting transformers and a beautiful case for Moving Coil step-up transformers. Products/Accessories.

New transformers!

September 9th, 2014|Products|

Tube amplifier line output transformer LL2745 is a line output transformer with modest turns ratio (2.8 + 2.8 : 1+1+1+1) and the same internal structure as our well known LL1660. Line Input Transformer LL1948 is a new amorphous core line input transformer designed to meet extreme audiophile requirements. The LL1948 is available with Cardas ultra-pure [...]

April 2012

Silver wire transformers!

April 17th, 2012|Products|

  Our top-of-the-line moving coil stepup transformers are now available with high purity silver wire windings. The transformers are named: LL1931Ag (1+1 : 8+8, amorphous core) LL1933Ag (1+1 : 8+8, mu metal core) LL1941Ag (1+1 : 16+16, amorphous core) LL1943Ag (1+1 : 16+16, mu metal core) In spite of the small difference in electrical conductivity [...]