This module is listed for individual sale.
Ready to use module replaces the Sanyo STK0030/40/50, but more robust.
The STK0050+ fits these models and probably a lot more:
SX-780, SR4000, KR-5010, RS-2004A, JA-S44, JCX-2050
NOTE: The STK0030/40/50 family is smaller than the STK0060/70/80 family.
Compact design, with the same mounting holes as the original Sanyo.
With just six solder connections, it takes a professional tech about 10 minutes to replace this module in a Pioneer SX-780.
Typical current gain 8,000-20,000 vs original 5,000.
15 amp, 160 volt transistors INSTEAD of the original 5 amp, 110 volt part.
These same power transistors are used in the 140 watt per channel Marantz SR8012, Denon AVR-X7200W, and the Yamaha RX-A3070.
NO bias adjustment, preset during testing.
NO paste needed, we supply silpads.
NO drilling or grinding to fit, only 4mm wider than the Sanyo.
NOT 35 years old or counterfeit. Sanyo quit making these in 1983.
YES, every module tested in our Pioneer SX-780 or Marantz SR 4000.
YES, gold-plated PCB. PCB Finish, ENIG (Gold), compliant with IPC-4552.
YES, 4 ohm speakers. We use 15 amp outputs vs original Sanyo 5 amp devices.
YES, free USPS shipping in the USA.
SX-780 typical performance into 8 ohms with the tone controls bypassed:
45 watt 1k 0.0039% 20k 0.0051%
4.5 watt 0.5k 0.0029%
1.0 watt 1k 0.0047% 20k 0.0177%
Performance into 4 ohms:
88 watts 1k 0.0095% 20k 0.0290%
1 watt 1k 0.0036% 20k 0.0934%
Noise -80 dBv 22-22k BW Audio Precision P1+DD test set
S/N 106 dB 22-22k
S/N 116 dB A-wtd
Hand tools and simple solder skills required.
Technical knowledge required.
No returns and limited support, this is not for beginners.
We do supply instructions and helpful test tips.
Other Products on Offer:
S-100+..........Sony SS-120A, Optonica S-100
SP-40W+.........SX-650, SA-7300, SA-6700, Rotel RA-414, Technics SA-425
STK0050+........SX-780, SR4000, KR-5010, RS-2004A, JA-S44, JCX-2050
STK0059+........Technics SA-300, SU-8044, Sanyo DCX-811, Pioneer SX-680, SX-690
STK0080+........Fisher RS-2010, CA-880, CA-800, Marantz SR6000
STK1060+........Sanyo STK1030, STK1040, STK1050, STK1060
STK1080+........Sanyo STK1070/80, Akai AA-R42
STV-X+..........Sanken STV-2H, STV-3H, STV-4HTA-100W+........Kenwood KA-8300/7500/9800
TA-100WA+.......Kenwood KA-9100/9150
TA-200W+........Kenwood KR-9600
ODR OUTER+......Converts Pioneer ODR Head units proprietary socket to Toslink
VS-1............Video/SPDIF/Audio Sensor for Home Automation
NOTE: The TA100W and TA-100WA are very similar, but do not run at the right temperature if swapped.