Table of Leak preamps and power amps from late 1940 to 1960's

					Early Amp	Year	M/S	Circuit	Tubes	Power(W)	Distortion
					Type 15	1946	Mono	4-stages	(2) KT66	15	0.1

Pre	Year	M/S	Circuit Notes	Tube(s)	Matching Amp	Year	M/S	Circuit	Tubes	Power	Distortion
RC/PA ¹	1948	Mono	Feedback (reducing exit impedance)	(1) EF40 pentode	TL/12	1948	Mono	Triode configuration for output stage	GZ32 -EF36/6J7 - ECC83/6SN7 - (2)KT66²	12	0.1
RC/PA/U	1950	Mono	Feedback shunt	(1)ECC40⁽³⁾	TL/12	1948	Mono	Triode configuaration in output stage	GZ32 -EF36/6J7 - ECC83/6SN7 - (2)KT66²	12	0.1
					TL/10	1950	Mono	Ultra-linear output stage	EF86 - 6SN7 - (2)KT66	10	0.1
Point One	1952	Mono	Baxandall feedback for tone circuit⁽⁴⁾	(2) EF86	TL/10	1950	Mono	Ultra-linear output stage	EF86 - 6SN7 - (2)KT66	10	0.1
Varislope	1952	Mono	Variable frequency low-filter	(1) ECC81/12AT7	TL/10	1950	Mono	Ultra-linear output stage	EF86 - 6SN7 - (2)KT66	10	0.1
Varislope II	1954	Mono	Feedback shunt	(2) EF86 pentode	TL/10	1950	Mono	Ultra-linear output stage	EF86 - 6SN7 - (2)KT66	10	0.1
Varislope III	1956	Mono	Baxandall feedback for tone circuit⁽⁴⁾	(2) EF86 pentode	TL/12 Plus	1956	Mono	Ultra-linear output stage	5AR4 - EF86 -ECC81 -EL84/6BQ5	12	0.1
					TL/25 Plus		Mono		5AR4 - EF86 -ECC81 -(2)EL34/6CA7	25(32)	0.1
					TL750 Plus		Mono	Ultra-linear output stage	5AR4 - EF86 -ECC81 -(2)KT88	50	0.1 ⁷
Point One Stereo	1958	Stereo	Baxandall feedback for tone circuit⁽⁴⁾	(4) EF86	Stereo 20	1958	Stereo	Ultra-linear output stage	5AR4 -(3) ECC83/12AX7 - (4) EL84/6BQ5 -	12 + 12	0.1
Point One Plus	1958(?)	Mono	Fixed slope for treble filter	(2) EF86	TL/12 Plus	1956	Mono	Ultra-linear output stage	5AR4 - EF86 -ECC81 -EL84/6BQ5	12	0.1
Varislope Stereo	1958-60	Stereo	Baxandall feedback for tone circuit⁽⁴⁾	(4) EF86	Stereo 50		Stereo	Ultra-linear output stage	5AR4 - (3) ECC83/12AX7 - (4) EL34/6CA7	25 + 25	0.1
					Stereo 50		Stereo	Ultra-linear output stage	5AR4 - (3) ECC83/12AX7 - (4) EL34/6CA7	25 + 25	0.1
Svarislope Stereo ⁵		Stereo	Baxandall feedback for tone circuit⁽⁴⁾	(4) EF86	Stereo 60		Stereo	Ultra-linear output stage	5AR4 - (3) ECC83/12AX7 - (4) EL34/6CA7	30 + 30	0.1
Varislope 2 Stereo ⁶	1960	Stereo	2 set-up limited slope	(4) EF86	Leak new series transistor amps

Remote control amplifier
Triode configuration
Double triode
Continuos control instead of stepped switches
Front panel and knobs in gold anodized aluminum
Anodized silver and grey front panel
Up to 45W

Leak Pre/Power Amps from late 40’s to 60’s

Leak Point One - Preamplifier

Leak Stereo 20 - Power Amplifier