Luxman L-309

Luxman L-309V

Luxman L-309X

September
1 9 7 3 september 1973
1 9 7 5 1975
1 9 7 8 1978

Luxurious mid-to-high-end amplifier which followed the L-308 and inaugurated LUX's staple Linear Equalizer.

Linear Equalizer is a 5-step up or down "tilt" to the preset RIAA curve, rotating the 1kHz-centered frequency response up or down : more bass & less treble or more treble & less bass.
There is too much compression and standardization today to justify a Linear Equalizer, but given the highly variable response curve of the recordings back then, this surely was uselful !

The regular tone controls are Lux's (other) staple NF controls with selectable center frequency.

The circuit is a fully-complementary DC power amp section with dual-rail power-supply and 3-stage DC EQ circuit for the phono - Single-Stage, Duo-ßeta, plus-X and Circuit /S were for later years.

Compared to the original L-308, the L-309 has an added back pot to attenuate the MAIN in input level and L/R MIC inputs with pull-on/off level pot instead of the tape 1 i/o jacks of the L-308.

Bar power output, the rest is the same : 2-position low cut, 2-position high cut, low boost, stereo/L/R/Mono (L+R)/Reverse, 3-position phono 1 impedance selector, tuner input level pot and 2-way dubbing/monitoring.

Beautiful, simple, healthy, shiny 1970s.


The L-309V version took over in late 1975 : exit the front tape i/os, replaced by the phono 1 impedance (previously located on the back) and 3-position muting switch (0dB / -10dB / -20dB), exit the MAIN in level pot and enter newer, bigger, speaker terminals.

Then the L-309X, c. 1978 replaced all, mainly doing away with the front MIC/MIX inputs and loop, swapping the regular trafo for a big toroidal, the regular volume pot with a proper 6-gang ALPS and probably circuits upgrades as well - an extra-rare and very brief version.



Inside a 309 here,
inside a 309X here.

Luxman L-309, image 1 Luxman L-309, image 2
Luxman L-309 specifications
Title Value
MAIN section L-309 : MAIN section[/C_1_B1]
RMS power output : 2x 75W (8 Ohm, continuous, both channels driven)
2x 85W (8 Ohm, continuous, single channel driven)
Power bandwidth : 5Hz...50Khz (-3dB ; 0,03% THD)
Frequency response : 10Hz...50Khz (± 1dB)
THD : < 0,03% (8 Ohm, 75W)
IMD : 0,04% (8 Ohm ; 75W)
Residual noise : 0,5mV (86dB)
Damping factor : 40 (8 Ohm)
Input : 600mV / 40kOhm
PRE section L-309 : PRE section
Frequency response : 10Hz...50Khz (line input ; -1dB)
THD : < 0,03% (line input ; 1V)
Inputs : 2,5mV / 90k-65k-50kOhm (phono 1)
2,5mV / 65kOhm (phono 2)
100mV / 150kOhm (aux 1 & 2)
100mV / 50kOhm (tuner)
Max. input signal : 300mV (phono ; 1Khz)
S/N ratio : > 65dB (phono 1 & 2)
> 80dB (lines)
Bass controls : ± 8dB / 100Hz ; 150Hz turnover
± 10dB / 100Hz ; 300Hz turnover
± 12dB / 100Hz ; 600Hz turnover
Treble controls : ± 12dB / 10Khz ; 1,5Khz turnover
± 10dB / 10Khz ; 3Khz turnover
± 8dB / 10Khz ; 6Khz turnover
Low cut filter : 20Hz or 70Hz / 6dB/octave
High cut filter : 7Khz or 12Khz / 6dB/octave
Low boost filter : 100Hz 6dB/octave
Special brand-new control : 5-steps Linear Equalizer
General L-309 : General
Dimensions : 48,5 x 30 x 16,5cm
Weight : 12,5kg.
Listprice : 120,000¥ (309 ; 1973)
148,000¥ (309 ; 1974)
158,000¥ (309X ; c. '77)
Luxman L-309 : 1 topic
(last updated topic shows up first)
  • Luxman L309V                             (2)last updated by Axel - 30/08/2010, 22H29
page online since : august 2010
page updated : not yet
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