List of Stax products

The following is a list of audio products manufactured by Stax Ltd.

Headphones

Currently in production

Earspeaker Model No.	Release Year	Bias Type	Notes
SR-001 MK2	1997	Pro, Special 6 Pin	In-Ear portable
SR-003	1997	Pro, 5 Pin	In-Ear
SR-007Mk2 / SR-007A	2007	Pro, 5 Pin	Omega series
SR-009	2011	Pro, 5 Pin	Omega series, Current Flagship
SR-L700	2015	Pro, 5 Pin	Lambda series
SR-L500	2015	Pro, 5 Pin	Lambda series
SR-507	2011	Pro, 5 Pin	Lambda series
SR-407	2011	Pro, 5 Pin	Lambda series
SR-307	2011	Pro, 5 Pin	Lambda series
SR-207	2010	Pro, 5 Pin	Lambda series

Discontinued

Earspeaker Model No.	Release Year	Bias Type	Notes
SR-1	1960	Normal, 6 Pin
SR-2	1968	Normal, 6 Pin
SR-3	1968	Normal, 6 Pin
SR-X	1970	Normal, 6 Pin
SR-3 New	1971	Normal, 6 Pin
SR-X/MK2	1972	Normal, 6 Pin
SR-5	1975	Normal, 6 Pin
SR-X/MK3	1975	Normal, 6 Pin
SR-40	1975	Electret
SR-60	1975	Electret
SR-Sigma	1977	Normal, 6 Pin	Sigma series
SR-50	1979	Electret	Closed back
SR-Lambda	1979	Normal, 6 Pin	Lambda series
SR-30	1982	Electret
SR-80	1982	Electret
SR-5N / SR-5NB	1982	Normal, 6 Pin
SR-Lambda Pro	1982	Pro, 5 Pin	Lambda series
SR-Gamma	1985	Normal, 6 Pin	Gamma series
SR-Gamma Pro	1985	Pro, 5 Pin	Gamma series
SR-X/MK3 Pro	1985	Pro, 5 Pin
SR-Sigma Pro	1987	Pro, 5 Pin	Sigma series
SR-Lambda Signature	1987	Pro, 5 Pin	Lambda series
SR-Alpha Pro Excellent	1989	Pro, 5 Pin	Alpha series
SR-80 Pro	1989	Electret
SR-30 Pro	1989	Electret
SR-Lambda Spirit	1992	Pro, 5 Pin	Lambda series
SR-Lambda Pro Classic	1993	Pro, 5 Pin	Lambda series
SR-Omega	1993	Pro, 5 Pin	Omega series
SR-Lambda Nova Basic	1994	Pro, 5 Pin	Lambda series
SR-Lambda Nova Classic	1994	Pro, 5 Pin	Lambda series
SR-Lambda Nova Signature	1994	Pro, 5 Pin	Lambda series
SR-001	1995	Pro, Special 6 Pin	In-Ear portable
SR-007 / SR-007BL	1998	Pro, 5 Pin	Omega series
SR-202 Basic	1999	Pro, 5 Pin	Lambda series
SR-303 Classic	1999	Pro, 5 Pin	Lambda series
SR-404 Signature	1999	Pro, 5 Pin	Lambda series
SR-404 Limited	2009	Pro, 5 Pin	Lambda series, Limited Edition, 1,000 units
4070	2001	Pro, 5 Pin	Closed back

Headphone amplifiers

Currently in production

Stax currently produces six solid-state and two hybrid vacuum-tube/solid-state hybrid earspeaker driver units.

Driver Unit Model No.	Release Year	Output Voltage (RMS)	Inputs	Outputs	Notes
SRM-001	1995	240V	1x Miniplug	1x Pro Bias, Special 6 Pin	Solid state, battery operated for portable use
SRM-300 / SRM-310	2003	350V	1x RCA	2x Pro Bias, RCA Loop Out	Solid state, styled as an earspeaker stand
SRM-252A / SRM-252II	2006	280V	1x RCA	1x Pro Bias, RCA Loop Out	Solid state
SRM-323A / SRM-323II	2006	400V	2x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-323S	2010	400V	2x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-353X	2015	400V	1 Balanced XLR, 2x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-727A	2006	450V	1x Balanced XLR, 2x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-727II	2007	450V	1x Balanced XLR, 1x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-006tA / SRM-006tII	2006	300V	1x Balanced XLR, 2x RCA	2x Pro Bias, RCA Loop Out	Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid
SRM-006tS	2010	300V	1x Balanced XLR, 2x RCA	2x Pro Bias, RCA Loop Out	Vacuum tube
SRM-007tA / SRM-007tII	2006	340V	1x Balanced XLR, 3x RCA	2x Pro Bias, RCA Loop Out	Vacuum tube (4x 6FQ7/6CG7) / Solid state hybrid

Discontinued

Driver Unit Model No.	Release Year	Output Voltage (RMS)	Inputs	Outputs	Notes
SRA-4S / SRA-6S	1960			2x Normal Bias	Vacuum tube
SRA-7S	1966			2x Normal Bias	Vacuum tube
SRA-8S	1967	350V		2x Normal Bias	Vacuum tube
SRA-3S	1968	279V		2x Normal Bias	Vacuum tube / Solid state hybrid
SRA-10S	1974			2x Normal Bias	Solid state
SRA-12S	1977	350V	5x RCA	2x Normal Bias, 2x RCA	Solid state
SRM-1	1979	370V	1x RCA,	2x Normal Bias	Solid state
SRM-1 Pro	1981	370V	1x RCA,	1x Pro Bias, 1x Normal Bias, 1x RCA loop out	Solid state
SRM-1/MK2	1982	370V	1x RCA	1x Pro Bias, 1x Normal Bias, 1x RCA loop out	Solid state
SRA-14S	1985	400V		1x Pro Bias, 1x Normal Bias	Solid state
SRM-T1	1987	300V	2x RCA	2x Pro Bias, 1x Normal Bias, 1x RCA loop out	Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid
SRM-Monitor	1988	370V	1x Balanced XLR, 1x RCA	2x Pro Bias, 1x Normal Bias, 1x RCA loop out	Solid state, diffuse field equaliser
SRM-1/Mk-2 PP	1990	370V	1x RCA	2x Pro Bias, 1x RCA loop out	Solid state
SRM-X Pro	1990	280V	1x miniplug, 1x RCA	1x Pro Bias, 1x Normal Bias	Solid state, Portable type
SRM-T1S	1993	300V	1x Balanced XLR, 2x RCA	2x Pro Bias, 1x Normal Bias, 1x RCA loop out	Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid
SRM-3	1994	300V	1x RCA	2x Pro Bias, 1x RCA loop out	Solid state
SRM-T1W	1994	300V	1x Balanced XLR, 2x RCA	2x Pro Bias (adjustable 480-580V), 1x Normal Bias	Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid
SRM-T2	1994	630V	1x Balanced XLR, 2x RCA	2x Pro Bias, 1x Normal Bias	Vacuum tube / Solid state hybrid
SRM-Xh	1997	280V	1x RCA	1x Pro Bias	Solid state
SRM-212	1999	280V	1x RCA	1x Pro Bias	Solid state
SRM-313	1999	350V	1x RCA	1x Pro Bias, 1x Normal Bias, 1x RCA loop out	Solid state
SRM-006t		300V	1x Balanced XLR, 2x RCA	2x Pro Bias, 1x Normal Bias, RCA Loop Out	Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid
SRM-007t	1998	340V	1x Balanced XLR, 2x RCA	2x Pro Bias, 1x Normal Bias, RCA Loop Out	Vacuum tube (4x 6FQ7/6CG7) / Solid state hybrid
SRM-717	2000	450V	1x Balanced XLR, 1x RCA	2x Pro Bias, RCA Loop Out	Solid state
SRM-600 Limited	2009	340V	1x Balanced XLR, 3x RCA	2x Pro Bias, RCA Loop Out	Vacuum tube (2x ECC99) / Solid state hybrid
SRM-252S		280V		1x Pro Bias	Solid state

Amplifier adapters

Adapter Unit Model No.	Release Year	Outputs	Notes
SRD-1	1960	2x Normal Bias
SRD-2	1960	2x Normal Bias
SRD-3	1965	2x Normal Bias
SRD-5	1968	2x Normal Bias
SRD-7	1971	2x Normal Bias
SRD-6	1973	1x Normal Bias
SRD-4	1975	Electret
SRD-6SB	1978	1x Normal Bias	Self-Bias
SRD-7SB	1979	2x Normal Bias	Self Bias
SRD-X	1979	1x Normal Bias	1/4" male plug input on integral coiled cord, no RCA. Portable, uses 8 C cell batteries or AC adapter.
SRD-7/Pro	1982-83	2x Pro Bias
SRD-7SB/MK2	1985	1x Pro Bias, 1x Normal Bias
SRD-X/Pro	1986	1x Pro Bias, 1x Normal Bias	RCA input
SRD-P	1986	2x Electret/Pro Bias	Both RCA and 1/8"(3.5MM) inputs. Portable, uses 8 C cell batteries or AC adapter.

Accessories

SRE-15/44 (5 meter) earspeaker extension cord (discontinued). SRE-750 (5 meter) and SRE-725 (2.5 meter), earspeaker extension cords.

HPS-2, wooden earspeaker stand.

HPS-1, wooden and plastic earspeaker stand (discontinued).