Yamaha M-2

Yamaha B-5

1 9 7 9 april 1979
1 9 8 3 1983

All things must pass - gone were the V-FET, long live the High-fT !
High-fTs are made of multiple miniature transistors connected in parallel, offering lower switching distortion and a high frequency cutoff (High fT) up to 80MHz, thus offering better linearity.

Just like Sony, Yamaha dropped the expensive Vertical FETs for cheaper ones... which Sony used as well in many of its own units, from the 1977 TA-N86B onward. Just as for the VFETs, both Sony and Yamaha touted that the High-fT were exclusive designs of their respective R&D labs :-)

Released in Japan as a B-5, without the meters, but an impedance output level, as found in earlier and contemporary amps like the CA-S1. A very healthy power amplifier anyway, with a keyword : p o w e r.
The chassis, heatsinks, toroidal transformer and internal structure (but not necessarily circuits) were reused in the later PC2002 and PC2002M professional amplifiers (here), both of which came from the P-2200, a july 1976 bigga PA amp.

Yamaha M-2, image 1 Yamaha M-2, image 2 Yamaha M-2, image 3
Yamaha M-2 specifications
Title Value
8 Ohm power : 2x 200W (20Hz...30Khz, 0,005% THD)
4 Ohm power : ?
IMD : less than 0,002% (half rated power)
Frequency response : 10...100Khz (8 Ohm, 100W, 0,01% THD)
Bandwidth : DC...100Khz (-0,7 / +0,5dB)
Damping factor : 200 (8 Ohm, 1Khz)
S/N ratio : 127dB (IHF-A)
Stereo separation : 100dB (1Khz)
80dB (20Khz)
Inputs : 1V / 25kOhm (for 100W / 8 Ohm output, 470pF)
PC : 1500W max.
Dimensions : 43,5 x 18,3 x 36,2cm
Weight : 23kg.
List price : 250,000¥ (1979)
Features Features
gold-plated RCA inputs
gold-plated speaker outputs
2,5mm pure copper bussing
phase-corrected polystyrene caps
Linear Transfer bias switching
ground termination
AC+DC inputs
2011 : japanese catalog finally at hand... but it seems that specifications
are quite different between the export M-2 and the original B-5.
Yamaha M-2 : 0 topic
(last updated topic shows up first)
page online since : 2005
page updated : not yet
page type : LGT / KNB
page weight : 163.75 Kb / 0 b

You must login to access your account.

I forgot my password

Log me automatically on each visit
Hide my online status for this session
> Create an account

  • TVK Talk Forum
  • TVK Museum
  • Specials
  • Timelines
  • Utilities
  • Games