# List of Stax products

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

## Headphones
### Currently in production

| Earspeaker Model No. | Release Year | Bias Type | Notes |
| SR-003MK2 | 2012 | Pro, 5-pin | In-Ear |
| SR-X1 | 2024 | Pro, 5-pin | |
| SR-X9000 | 2021 | Pro, 5-pin | Omega series, Current Flagship |
| SR-009S | 2018 | Pro, 5-pin | Omega series |
| SR-007Mk2 / SR-007A | 2007 | Pro, 5-pin | Omega series |
| SR-L300 | 2016 | Pro, 5-pin | Lambda series |
| SR-L700MK2 | 2019 | Pro, 5-pin | Lambda series |
| SR-L500MK2 | 2019 | 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-34 | 1982 | Electret | SR-30 Electret Earspeakers & SRD-4 Adaptor |
| 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-003 | 1997 | Pro, 5-pin | In-Ear |
| SR-001 MK2 | 1997 | 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 |
| 4070 | 2001 | Pro, 5-pin | Closed back |
| SR-404 Limited | 2009 | Pro, 5-pin | Lambda series, Limited Edition, 1,000 units |
| SR-207 | 2010 | Pro, 5-pin | Lambda series |
| SR-307 | 2010 | Pro, 5-pin | Lambda series |
| SR-407 | 2010 | Pro, 5-pin | Lambda series |
| SR-507 | 2010 | Pro, 5-pin | Lambda series |
| SR-002 | 2012 | Pro, special 6-pin | In-Ear portable |
| SR-L700 | 2015 | Pro, 5-pin | Lambda series |
| SR-L500 | 2015 | Pro, 5 Pin | Lambda series |
| SR-L300 Limited | 2018 | Pro, 5-pin | Lambda series, Limited Edition, 800 units |
| SR-009 | 2011 | Pro, 5-pin | Omega series |

## Headphone amplifiers
### Currently in production

Stax currently produces six solid-state and three hybrid vacuum-tube/solid-state hybrid earspeaker driver units.
| Driver Unit Model No. | Release Year | Output Voltage (RMS) | Inputs | Outputs | Notes |
| SRM-001 | 1995 | 240 V | 1x Miniplug | 1x Pro Bias, Special 6 Pin | Solid state, battery operated for portable use |
| SRM-252S | 2010 | 280 V | 1x RCA | 1x Pro Bias, RCA Loop Out | Solid State |
| SRM-T8000 | 2017 | 470 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube / Solid state hybrid, Current Flagship |
| SRM-D10 | 2018 | 200 V | 1x micro USB, 1x 1/8" analog | 1x Pro Bias | Solid state, with DAC |
| SRM-D50 | 2018 | 400 V | 1x USB B, 1x TOSLINK, 1x S/PDIF, 1x RCA | 1x Pro Bias | Solid state, with DAC |
| SRM-700T | 2020 | 340 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (2x 6SN7) / Solid state hybrid |
| SRM-700S | 2020 | 450 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-500T | 2021 | 300 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (2x 6FQ7 / 6CG7) / Solid state hybrid |
| SRM-400S | 2021 | 400 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Solid state |

### 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 | 350 V | | 2x Normal Bias | Vacuum tube |
| SRA-3S | 1968 | 279 V | | 2x Normal Bias | Vacuum tube / Solid state hybrid |
| SRA-10S | 1974 | | | 2x Normal Bias | Solid state |
| SRA-12S | 1977 | 350 V | 5x RCA | 2x Normal Bias, 2x RCA | Solid state |
| SRM-1 | 1979 | 370 V | 1x RCA, | 2x Normal Bias | Solid state |
| SRM-1 Pro | 1981 | 370 V | 1x RCA, | 1x Pro Bias, 1x Normal Bias, 1x RCA loop out | Solid state |
| SRM-1/MK2 Pro | 1982 | 370 V | 1x RCA | 1x Pro Bias, 1x Normal Bias, 1x RCA loop out | Solid state |
| SRA-14S | 1985 | 400 V | | 1x Pro Bias, 1x Normal Bias | Solid state |
| SRM-T1 | 1987 | 300 V | 2x RCA | 2x Pro Bias, 1x Normal Bias, 1x RCA loop out | Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid |
| SRM-1/Mk-2 PP | 1990 | 370 V | 1x RCA | 2x Pro Bias, 1x RCA loop out | Solid state |
| SRM-X Pro | 1990 | 280 V | 1x miniplug, 1x RCA | 1x Pro Bias, 1x Normal Bias | Solid state, Portable type |
| SRM-T1S | 1993 | 300 V | 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 | 300 V | 1x RCA | 2x Pro Bias, 1x RCA loop out | Solid state |
| SRM-T1W | 1994 | 300 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias (adjustable 480–580 V), 1x Normal Bias | Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid |
| SRM-T2 | 1994 | 630 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias | Vacuum tube / Solid state hybrid |
| SRM-Xh | 1992 | 280 V | 1x RCA | 1x Pro Bias | Solid state |
| SRM-212 | 1999 | 280 V | 1x RCA | 1x Pro Bias | Solid state |
| SRM-252A/SRM-252II | 2006 | 280 V | 1x RCA | 1x Pro Bias, RCA Loop Out | Solid State |
| SRM-313 | 1999 | 350 V | 1x RCA | 1x Pro Bias, 1x Normal Bias, 1x RCA loop out | Solid state |
| SRM-006t | 1999 | 300 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, 1x Normal Bias (or Pro Bias), RCA Loop Out | Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid |
| SRM-007t | 1998 | 340 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, 1x Normal Bias (or Pro Bias), RCA Loop Out | Vacuum tube (4x 6FQ7/6CG7) / Solid state hybrid |
| SRM-717 | 2000 | 450 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-323A / SRM-323II | 2006 | 400 V | 2x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-006tA / SRM-006tII | 2006 | 300 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (2x 6FQ7/6CG7) / Solid state hybrid |
| SRM-727A | 2006 | 450 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-727II | 2007 | 450 V | 1x Balanced XLR, 1x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-600 Limited | 2009 | 340 V | 1x Balanced XLR, 3x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (2x ECC99) / Solid state hybrid, Limited Edition, 600 units |
| SRM-323S | 2010 | 400 V | 2x RCA | 2x Pro Bias, RCA Loop Out | Solid state |
| SRM-353XBK | 2018 | 400 V | 1 Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Solid state, Limited Edition, 300 units |
| SRM-006tS | 2010 | 300 V | 1x Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (2x 6FQ7/6CG7) |
| SRM-007tA / SRM-007tII | 2006 | 340 V | 1x Balanced XLR, 3x RCA | 2x Pro Bias, RCA Loop Out | Vacuum tube (4x 6FQ7/6CG7) / Solid state hybrid |
| SRM-300 / SRM-310 | 2003 | 350 V | 1x RCA | 2x Pro Bias, RCA Loop Out | Solid state, styled as an earspeaker stand |
| SRM-353X | 2015 | 400 V | 1 Balanced XLR, 2x RCA | 2x Pro Bias, RCA Loop Out | Solid state |

## Amplifier adapters

Stax currently does not produce any 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 eight 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"(3.5 mm) inputs. Portable, uses eight C cell batteries or AC adapter. |

## Systems (headphone + driver)

| System Model no. | Earspeaker Unit Model no. | Driver Unit Model No. | Notes |
| SRS-002 | SR-002 | SRM-002 | In-Ear. Battery operated for portable use. |
| SRS-005 | SR-003 | SRM-212 | In-Ear. |
| SRS-005S Mk2 | SR-003mk2 | SRM-252S | In-Ear. |
| SRS-2050 | SR-202 | SRM-252 | Basic System |
| SRS-2170 | SR-207 | SRM-252S | Basic System |
| SRS-3170 | SR-307 | SRM-323S | |
| SRS-4170 | SR-407 | SRM-006tS | |
| SRS-3100 | SR-L300 | SRM-252S | |
| SRS-5100 | SR-L500 | SRM-353X | |

## Electrostatic loudspeakers (discontinued)

* ELS-4A - Electrostatic loudspeakers, 1976
* ELS-6A - Electrostatic loudspeakers, 1976
* ELS-F81 - Electrostatic loudspeaker, 1981
* ESTA-4U - Electrostatic loudspeaker, 1982 (self-biasing)
* EK-1 - Kit electrostatic speaker, 1983
* ELS-F83 - Electrostatic loudspeaker, 1983
* ESTA-4U Extra - Electrostatic loudspeaker, 1983 (self-biasing)
* EK-1/MK2 - Electrostatic loudspeaker, 1984
* ELS-F81 NEW - Electrostatic loudspeaker, 1984
* ELS-8X BB - Electrostatic loudspeaker, 1987 (battery-biased)
* ELS-6X - Electrostatic loudspeaker, 1988
* ELS-8X - Electrostatic loudspeaker, 1988
* ELS-F81X - Electrostatic loudspeaker, 1988
* CLASS Model2 - Electrostatic loudspeaker, 1992

## Tonearms

* UA-3 - Tonearm
* UA-3N - Tonearm
* UA-3NL -Tonearm
* UA-7 - Tonearm
* UA-70 - Tonearm
* UA-7N - Tonearm
* UA-70N - Tonearm
* UA-7cf - Tonearm
* UA-9N - Tonearm
* UA-90N - Tonearm
* UA-9 - Tonearm
* UA-90 - Tonearm

## Other audio products

* CPY - Electrostatic phono cartridge
* CPY-MK2 - Electrostatic phono cartridge
* ECP-1 - Equalizer/adapter for Stax electrostatic photo cartridges
* ED-1 Monitor - Equalizer for SR-Lambda/Professional, 1988
* ED-1 Signature - Diffuse field equalizer for SR-Lambda Signature, 1990
* DAC-X1T - Digital-to-analogue converter, 1989
* DAC-TALENT - Digital-to-analogue converter, 1990
* DA-300 - Speaker amplifier
* DA-80 - Speaker amplifier
* CDP Quattro - CD player, 1986
* CDP Quattro 2 - CD player, 1988

## Accessories

* SRE-15/44 (5 meter) earspeaker cable extension cord (discontinued)
* SRE-750 or SRE-950S (5 meter) and SRE-725 or SRE-925S (2.5 meter), earspeaker extension cords
* HPS-2, wooden earspeaker stand
* HPS-1, wooden and plastic earspeaker stand (discontinued)
* CPC-1, protective cover