zenith2134
Lunatic Member
Alls I know is Tears for Fears sounds especially good on a Natural Sound unit for some reason.
Is The YAMAHA MX1000 The Best AMP From YAMAHA?
- Thread starter GlobalWarming
- Start date
The MX-2000 is not Class A. It uses Yamaha's HCA circuit.
Yamahalic
Super Member
Here is another HCA blurb from Yamaha that came out with my MX-2 amp:
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HCA (HYPERBOLIC CONVERSION AMPLIFICATION)
The Yamaha developed HCA circuit goes a step beyond the conventional Class A amplification generally used in a high performance amplifier. In a Class A amp, when output exceeds a limit determined by the idling current, operation degrades to Class AB, resulting in increased crossover and switching distortion. With the HCA there's less distortion and less heat generation.
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HCA (HYPERBOLIC CONVERSION AMPLIFICATION)
The Yamaha developed HCA circuit goes a step beyond the conventional Class A amplification generally used in a high performance amplifier. In a Class A amp, when output exceeds a limit determined by the idling current, operation degrades to Class AB, resulting in increased crossover and switching distortion. With the HCA there's less distortion and less heat generation.
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Yamaha used the HCA circuit in the Limited Centennial edition amp, the MX-10000. Yamaha's history with pure class A power supplies goes back a long ways, at least back to the highly regarded BX-1 mono block amp of the late 70's. Yamaha could have designed the MX-10000 as pure class A if they had wanted to, but used HCA instead.
Yamahalic
Super Member
SoCal Sam makes an interesting point, including the Yamaha Pro amps in our discussion (he mentioned the PC2002M). I dug through some of my old Yamaha literature, and found an intersting beast called a PC4002M (430w x 2 @ 8ohms, 95lbs.). I once owned a Yamaha P3500 pro amp (395w x 2 @ 8ohms, 55 lbs.), but I got rid of it because I could not come to terms with the loud fan noise. This can be a strong minus when considering the pro amps as they are designed to be placed in a remote location (or on a noisy stage), not exposed in a quiet environment such as in many consumer set-ups.
On another note, two more interesting Yamaha super amps come to mind, one I just recently discovered on another AK thread ("The Vintage Super Amps") called a Yamaha 101M (very large and substantial looking build, 500w x 2 @ 8 ohms), and a more recent Yamaha MX-D1 (500w WPC RMS, THD 0.003% or less at 1kHz, 120dB dynamic range, and exceptionally wide bandwidth: 1Hz–100kHz, ±3dB).
Lastly, I have always loved the unique design and look of the Yamaha B-6 (200w x 2 @ 8 ohms, THD 0.003%, S/N 127 db, stereo separation 92dB, bandwidth 10Hz-100kHz) pyramid looking amp simply because it is distinctive in looks and design, and its specs are impressive as well.
On another note, two more interesting Yamaha super amps come to mind, one I just recently discovered on another AK thread ("The Vintage Super Amps") called a Yamaha 101M (very large and substantial looking build, 500w x 2 @ 8 ohms), and a more recent Yamaha MX-D1 (500w WPC RMS, THD 0.003% or less at 1kHz, 120dB dynamic range, and exceptionally wide bandwidth: 1Hz–100kHz, ±3dB).
Lastly, I have always loved the unique design and look of the Yamaha B-6 (200w x 2 @ 8 ohms, THD 0.003%, S/N 127 db, stereo separation 92dB, bandwidth 10Hz-100kHz) pyramid looking amp simply because it is distinctive in looks and design, and its specs are impressive as well.
VintInfinity
Tactophonic
Love my PC2002M, no fans on that one, just 4 really big heatsinks.
SoCal Sam
Lunatic Member
My PC2002M's run just above room temperature and I run mine stacked. I'm never concerned about heat soak.
Bigears
Manager of my own day
Now that SoCal Sam mentions it, I've had M-85's and MX-1000's and while solid performers, they are history. Run very hot and don't handle difficult loads well. Like others have said, the PC2002's offer equal power with better sonics (IMHO) and zero heat issues. I can't get mine to heat up even when driving difficult loads in tight quarters. Not too concerned with spare parts either...there seems to be enough of these around to keep them all running.
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Yamahalic
Super Member
The Yamaha 500WPC Amp Challenge:
It now seems difficult to pick a "best" Yamaha amp, although there are so many fine contenders from which to choose. I would be curious to hear a direct comparison between two very notable Yamaha amps of similar power ratings, the Yamaha PC5002M vs. the Yamaha MX-D1...old school vs. new school...pro type vs. consumer type...analog vs. digital...bigger than life vs. not-so-big...back breaker vs. magic maker.
It now seems difficult to pick a "best" Yamaha amp, although there are so many fine contenders from which to choose. I would be curious to hear a direct comparison between two very notable Yamaha amps of similar power ratings, the Yamaha PC5002M vs. the Yamaha MX-D1...old school vs. new school...pro type vs. consumer type...analog vs. digital...bigger than life vs. not-so-big...back breaker vs. magic maker.
Hmmm, who has both of those amps besides me? I posted my opinion in Neanderthals thread on the PC5002M.
Yamahalic
Super Member
The Yamaha Ultra MX Challenge
Mark B, I read your comments in "Neanderthals thread", thank you for the info. You are very fortunate to have been able to hear both of these powerful amps to be able to compare them. Now, onto my Challenge #2...
The Yamaha Ultra MX Challenge
- In one corner the MX-10000, in the other the MX-2000.
- Both extraordinarily rare and beautiful, with outstanding design, specs, and build qualities.
- The older MX-10000 versus the newer MX-2000.
- Both the jewels of Yamaha past, both worthy of stereophile envy (powerful yet capable of artistic subtlety)
Mark B, I read your comments in "Neanderthals thread", thank you for the info. You are very fortunate to have been able to hear both of these powerful amps to be able to compare them. Now, onto my Challenge #2...
The Yamaha Ultra MX Challenge
- In one corner the MX-10000, in the other the MX-2000.
- Both extraordinarily rare and beautiful, with outstanding design, specs, and build qualities.
- The older MX-10000 versus the newer MX-2000.
- Both the jewels of Yamaha past, both worthy of stereophile envy (powerful yet capable of artistic subtlety)
Yamahalic
Super Member
The Yamaha 200WPC Challenge
I thought up another one, although I doubt these would quite match up to the MX-10000, MX-2000, and PCx002M series, but...
Contestants:
- M-2
- B-6 (aka. the pyramid)
- MX-1
Specs as follows (seems close to me)…
Min. RMS Output
M-2 200W + 200W (8ohms, 20Hz-30kHz, 0.005%THD)
B-6 200W + 200W (8ohms, 20Hz-20kHz, 0.003%THD)
MX-1 200W + 200W (8ohms, 20Hz-20kHz, 0.008%THD)
Damping Factor (8ohms, 1kHz)
M-2 200
B-6 200
MX-1 250
Channel Separation (1kHz)
M-2 100db
B-6 92db
MX-1 80db
S/N Ratio (IHF-A)
M-2 127db
B-6 127db
MX-1 125db
I thought up another one, although I doubt these would quite match up to the MX-10000, MX-2000, and PCx002M series, but...
Contestants:
- M-2
- B-6 (aka. the pyramid)
- MX-1
Specs as follows (seems close to me)…
Min. RMS Output
M-2 200W + 200W (8ohms, 20Hz-30kHz, 0.005%THD)
B-6 200W + 200W (8ohms, 20Hz-20kHz, 0.003%THD)
MX-1 200W + 200W (8ohms, 20Hz-20kHz, 0.008%THD)
Damping Factor (8ohms, 1kHz)
M-2 200
B-6 200
MX-1 250
Channel Separation (1kHz)
M-2 100db
B-6 92db
MX-1 80db
S/N Ratio (IHF-A)
M-2 127db
B-6 127db
MX-1 125db
Yamahalic
Super Member
Yamaha GF-D1
Speaking of Class A, I suppose another contender "might be" the rare and expensive Yamaha GF-D1. I search the web every now and then to see if anyone ever might publish an audio critique of this amp removed from the GF-1 speakers, but have yet to come across any.
www.hifido.co.jp
www.hifido.co.jp
Speaking of Class A, I suppose another contender "might be" the rare and expensive Yamaha GF-D1. I search the web every now and then to see if anyone ever might publish an audio critique of this amp removed from the GF-1 speakers, but have yet to come across any.
www.hifido.co.jp
www.hifido.co.jp
looks to me like that could be HCA as well. that's less heat-sinking than you normally see on a traditional fixed-bias Class A 100wpc amp, although the amp itself is bigger than you'd expect for a 100wpc HCA amp, at least compared to Yamaha's other efforts.
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and then there's my M-70 (amazing amp, I'm in love with it), also similar specs although slightly different again (see attached jpg screenshot I took from the specs section of the maintenance manual):
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rushfan
Super Member
Those are great numbers, for sure.
I aspire to own one of those TOL Yamaha amps one day. My experience with the M-65 has been great. It's truly a great sounding amp - clearly better than many I have listened to in the past couple of years. When I listen to it in class A mode, it makes me wonder how much cleaner an amp can get.
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