Vintage AmplifierCollectors archive

Leak TL/25 Plus Tube Amplifier, Boxed

H.J. Leak & Co. First posted January 2013

Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.

Leak TL25 Plus Tube Amplifier
Leak TL25 Plus Tube Amplifier
From the original site

I do not have much knowledge of these items, they have not been tested. These item were sent home by a GI and by the time he got home he had a family and they sat in a closet for over 30 years.

Added in 2026

About this model

The TL/25 Plus was one of Leak's ultra-linear mono amplifiers built on the layout of the 1948 TL/12, rated at 25 watts. The Science Museum Group holds an example dated around 1965; Radiomuseum lists the model as 1958 with a question mark. Wikipedia's article on the EL34 names the Leak TL25 among the amplifiers that used that tube.

This boxed pair, according to the seller, was sent home by an American GI and sat untested in a closet for more than thirty years. Amplifiers stored that long need new capacitors before use, and boxed examples are worth keeping boxed.

At a glance
MakerH.J. Leak & Co., London
ModelTL/25 Plus
TypeMono power amplifier, ultra-linear
Rated output25 W
Output tubesKT66 or EL34 (both appear in period sources)
Datec. 1958–1965 (sources differ)

Questions collectors ask

How powerful is the Leak TL/25 Plus?

25 watts, from an ultra-linear output stage. Period sources show both KT66 and EL34 output valves in this model.

When was the Leak TL/25 Plus made?

Sources differ: Radiomuseum gives 1958 with a question mark, and the Science Museum Group dates its example to about 1965.

Sources: Science Museum Group: Leak TL25 plus; Radiomuseum: Leak TL/25 Plus; Wikipedia: LEAK.

More from the archive