Even the price of these units, though hardly insignificant, is far from the stratospheric levels of many high-end components. User login. Also, we cannot understand why the M-80 had a "Auto Class-A Power" switch at all. Sort by. For our part, even using conventional tone controls involves more "fiddling" than we care for, so these controls would probably get little from us. $149.99 by Amazon; View price information > Not satisfied with those reviews? For example, its dynamic headroom into 4 ohms was no less than 3.78 dB, with short-term power getting up to 787 watts per channel. The M-80, 17-1/8 inches wide, 16-3/4 inches deep, and 6-1/2 inches high, weighs a little over 50 pounds. As the loudness setting is reduced, the overall level goes down but the sound remains solid and well balanced, without a trace of the heaviness added by almost every other loudness control we have used. Some other loudness controls might also have made these sounds audible, but they would have left their mark in the form of intolerably unnatural voice quality. Reviewed Jan 05th, 2017 by . Yamaha Pre Amplifiers. The amplifier was stable when driving reactive simulated speaker loads and the standard IHF reactive load. The attention to detail in these products is impressive. C-85. The Yamaha C-80 is 17-1/8 inches wide, 15 inches deep, and 3-3/4 inches high. It wasn't even practical to drive both channels simultaneously into 2-ohm loads, since this overloaded our 15-ampere test-bench power system! To purchase C-80 spares or accessories, please contact the company via their website or visit an authorised retailer. Outstanding! The Natural Sound line combines highly sophisticated circuit design, for minimum distortion and noise, with some unusual control features. Given Yamaha's emphasis on the low-distortion circuitry of the M-80, we should not have been too surprised at the results of our distortion measurements. For some people, the parametric tone controls may be even more important. Among its special features is a switchable "Auto Class A Power" circuit that is supposed to operate the output transistors in Class A (for minimum distortion) at low power levels and make an imperceptible transition to Class AB as more power is required. The C-80 tone controls can easily simulate the action of conventional tone controls as well as giving a near-infinite variety of other response curves not obtainable with any but parametric controls. The frequency response of the C-80 was ruler-flat over most of the audible range, and its RIAA phono equalization was not affected significantly by the presence of the cartridge inductance at the phono input. For the inveterate "knob twiddler," however, the C-80 should be an ideal choice. Interestingly, we could measure no difference in distortion when we switched on the "Auto Class-A" circuit, even at low power levels of a watt or less. The M-80 is an extremely powerful amplifier, differing from most (especially those of Japanese origin) in having ratings for driving loads as low as 2 ohms. The loudness compensation was far and away the best we have used, so ideal in its operation that more than once when listening at very low levels we were surprised to hear solid organ or drum sounds in the low bass that should not have been audible at those levels. Poor Build quality compared to M-80 The bandwidth parameter, adjustable from 0.3 to 3, varies the width of the affected portion of the spectrum. These Yamaha "Natural Sound" components are well worth their price in today's market. C-65. Like; Tweet; Submit; Average Score: 4.5 ( 4.5/5 based on 2 reviews ) 1 user review: 50 % : 1 user review: 50 %: Buy this product. Every signal connector is gold-plated, as are the plugs on the twin shielded cable supplied with the C-80 for connection to the M-80. The price of each unit is $750. If you have any problems opening files please read the download FAQ. Yamaha C-80 and Yamaha M-80 From the top of Yamaha's "Natural Sound" line of audio separates come the C-80 preamplifier (Yamaha prefers to call it a "control amplifier") and the M-80 power amplifier. This website is not affiliated with or sponsored by Yamaha. Comments . C-70. They were indeed difficult and time-consuming to make, since the 1,000-Hz THD of this amplifier (driving 8-ohm loads) was less than 0.0025 percent up to the clipping point, and typically well under 0.001 percent. All user reviews for the Yamaha C-40. Our members also liked: Nad C372; Pioneer VSX-808RDS; Yamaha A-S500; View price information. By and large, they come as close to being ideal audio signal amplifying components as any we have seen (and heard). There are even fewer nits to pick concerning the C-80 preamplifier. It is difficult to take exception to any aspect of the performance of the Yamaha C-80 and M-80. 11/24/2004. If you have additional documentation please consider donating a copy to our free archive. And it sounded great. zangsax Working flawlessly for 26 yrs so far. The graph shows the treble control's maximum boost at maximum bandwidth when dialed to frequencies of 800, 4,500, and 20,000 Hz and the bass control's maximum cut at minimum bandwidth when dialed to 31.5, 150, and 800 Hz. The M-80 power amplifier, as its weight of over 50 pounds implies, is not an amplifier to be taken lightly. Design and Content © HiFi Engine 2006-2020, Vinyl Engine | FAQ | Site Policy | Cookie Options. Surprisingly, although Yamaha makes a point of the ability of the speaker connectors to accept oversized, heavy-duty speaker wires, they cannot be used with the Monster Cable Xterminator plugs or standard banana plugs. Reviews. Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line), Signal to noise ratio: 91dB (MC), 95dB (MM), 106dB (line), Channel separation: 70dB (MM), 50dB (line), Output: 150mV (line), 1.5V (Pre out), 8.5V (Pre out Max), instruction/owners manual   - Esteban Bikic. As the data in the table show, its output clipped at a very high level, and at any output up to the clipping point the 1,000-Hz distortion was extremely low. The parametric tone controls of the C-80 proved capable of response modifications far exceeding the ability of conventional tone controls. Finally, we came to the 2-ohm measurement, the nemesis of so many amplifiers. We made several response plots to measure the limits of the controls' effects. All the controls operate with smoothness and precision as well as electrical silence. It is a superb unit, as undaunting in appearance as any we have seen when its hinged panel is closed, yet as versatile as any when it is open. The phono (MM) input overloaded at safely high levels over the entire audio-frequency range. They can be purchased and used separately, but their all-black finishes harmonize, and the preamp can be stacked on top of the power amp. From the top of Yamaha's "Natural Sound" line of audio separates come the C-80 preamplifier (Yamaha prefers to call it a "control amplifier") and the M-80 power amplifier. Even with 4-ohm loads the distortion never exceeded 0.01 percent, and with 2-ohm loads it rose from less than 0.001 percent at a few watts to 0.02 percent at 300 watts and 0.15 percent at 400 watts. Both the M-80 and the C-80 employ what Yamaha calls "Zero Distortion Rule" circuits, apparently a combination of feedback and feedforward techniques that, in theory, can reduce distortion to zero. The C-80 has at least two of them: parametric tone controls and a continuously variable loudness control with an unconventional response characteristic. Its top became very hot (above the internal heat sinks) during the one-hour preconditioning and the following high-power tests, but it was no more than moderately warm in normal use. I have had several different Yamaha preamps-the C4,C70,c85 and the C1. The phono input impedance in the moving magnet (or MM) mode measured 48,000 ohms at 1,000 Hz, though it could not be modeled by a simple parallel combination of a resistance and capacitance. Login/Register. Login or register to post reviews. Driving one channel, the clipping power was 612 watts, and the dynamic power was a staggering 1045 watts. Yamaha literature also emphasizes the special circuitry used to reduce noise and distortion in its phono input stage. We did not make any measurements of the illuminated power indicators except to verify that in their peak mode they held the highest reading for an indefinitely long period (many minutes), and that the load buttons changed the indicator sensitivity by approximately the correct amount to read the power into loads of 2, 4, or 8 ohms. They can be purchased and used separately, but their all-black finishes harmonize, and the preamp can be stacked on top of the power amp. Request a new review. The audible results are solely up to the patience and listening judgment of the user. CX-1. At the loudness knob's maximum setting, the response is flat and the volume control can be set for the loudest level at which one expects to listen. Each (bass and treble) has three adjustments: level (boost or cut over a ± 12-dB range, with a flat-response center-detented position), center frequency (continuously variable over a range of 31.5 Hz to 800 Hz for the bass control, and from 800 Hz to 20,000 Hz for the treble), and "Q" or bandwidth. However, since we found no measurable or audible changes in distortion (or anything else) when this button was pressed or released, the point is moot. We tested them together, and they performed very well indeed. But the action of the Yamaha circuit is really undetectable except when it is doing what it is meant to do. We tested the C-80 preamplifier while driving a standard IHF load (10,000 ohms in parallel with 1,000 picofarads). Pre-Preamp burnt the CCT board to ruin the stage. It weighs 15 pounds. There could be no conceivable reason to switch off a circuit that produced the benefits claimed for this one. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited. The M-80's power performance into 8-ohm loads was quite impressive, but the really special qualities of the amplifier became more apparent when we drove lower impedance loads. DaddyCoolDell Poor Build quality compared to M-80 Pre-Preamp burnt the CCT board to ruin the stage. Reviewed Oct 27th, 2019 by . | FAQ | Site Policy | Cookie Options Engine 2006-2020, Vinyl Engine | FAQ | Policy... Controls and yamaha c80 preamp review continuously variable loudness control with an unconventional response characteristic reactive speaker! Via their website or visit an authorised retailer loads, since this overloaded our 15-ampere test-bench system! Emphasizes the special circuitry used to reduce noise and distortion in its phono input stage, with some control... Large, they come as close to being ideal audio signal amplifying components as any we seen. 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