About the Yamaha A-S2100
An amplifier to look up to
An amplifier to look up to
We audiophiles can get a little nitpicky when it comes to equipment and sound quality — even downright ornery on occasion. That's why we aspire to own an amplifier like the Yamaha A-S2100. It can coax aural wonders from our speakers, it's impeccably built, and has a no-nonsense appearance that says, "I'm going to knock your socks off." While lesser integrated amps can certainly make sweet music, our chase for new levels of sonic pleasure make the A-S2100 a worthy objective and a pure delight.
The well-built A-S2100 amplifier features a large power supply and four large capacitors to deliver plenty of clean, dynamic power to your speakers.
Power and finesse
Many of the A-S2100's finer traits have been borrowed from Yamaha's flagship A-S3000. There's a large power transformer, delivering a heavy dose of current to satisfy even demanding 4-ohm speakers. But superior sound is about more than just brute force. That's where Yamaha's exclusive Floating and Balanced Power Amplifier comes in. It employs a symmetrical layout with isolated circuitry, ensuring a very high signal-to-noise ratio and a large, well-defined soundstage. This design also separates the power amp circuit from the "ground," so even tiny voltage fluctuations don't adversely affect sound quality. The fully balanced signal path ensures an ultra-low-noise signal.
A component you can be proud of
It's more than just the inner workings of this amp that demand respect. Check out those VU meters on the front panel. They harken back to an era in audio when sound quality was king and dancing dials were a visual representative of a component's dynamic agility. Heavy-duty switches and knobs grace the front panel, while a generous offering of connections on the back can accomodate both balanced and unbalanced sources. Once you've hoisted this handsome heavyweight into your cabinet or rack, you'll want to show it off like any new addition to the family. Except no one will complain when this thing gets loud.
- 90 watts x 2 channels into 8 ohms (20-20,000 Hz) at 0.07% THD
- 150 watts x 2 channels into 4 ohms (20-20,000 Hz) at 0.07% THD
- 4-ohm capability allows use with a wide range of speakers
- signal-to-noise ratio: 103 dB (CD, etc.), 93 dB (phono MM), 85 dB (phono MC)
- large illuminated level meters (VU or peak) for left and right channels
- large-capacity power transformer delivers clean, stable current
- full-stage balanced signal transmission for exceptionally clean, transparent sound
- Floating Balanced Power Amplifier design reduces distortion and noise
- symmetrical amp layout separates left and right channel circuits for improved signal-to-noise ratio
- aluminum front panel and wood side panels
- discrete phono preamplifier
- rotary bass and treble controls
- front-panel switching for 2 pairs of speakers
- binding-post speaker connectors with oversized screw-tops
- remote control
Connections and Dimensions:
- 1 pair of balanced XLR inputs
- 5 pairs of unbalanced RCA audio inputs, including MM (moving magnet)/MC (moving coil) phono input
- 1 stereo RCA record output
- preamp out/main in jacks
- 2 pairs of heavy-duty brass screw-type speaker terminals
- full-size headphone jack
- 12-volt trigger and remote in/out for use with external controllers
- detachable power cord
- weight: 51.6 lbs.
- 17-1/8"W x 6-1/8"H x 19-3/16"D
- warranty: 2 years
- Our 60-day money-back guarantee
- MFR # A-S2100BL
What's in the box:
- Integrated stereo amplifier
- 6.5' AC power cord
- Remote control (RAS31)
- 2 "AAA" batteries
- Owner's Manual
- Safety Brochure
- Online Product Registation Sheet
- US Warranty Information
- Canada Warranty Information
- "Yamaha Worldwide Representative Offices" Note
Yamaha A-S2100 reviews
I bought this particular amplifier because it had great reviews on performance when playing vinyl records and listening with headphones. It surpassed my expectations. No need for a separate headphone amp. The one built into this Yamaha is fantastic. This silver version is very nice looking. Crutchfield and UPS got this amplifier to me in California in perfect condition. I highly recommend the Yamaha A- S2100.
2 of 3 found this helpful
One small update.Something you should know about this amp.It uses relays when switching from loudspeakers to headphones .The same is with input selector.Now this might be a problem - if relay stays in same position many days or weeks,the contacts might oxidate losing tight contact and sound become poor - sharp highs and poor bas.My suggestion is - every time you want to listen music plug in firstly headphones for a second and move the input selector in any position and then turn it back in position you want to listen - doing so you are cleaning the relay surface from ultrathin oxide coat...you will be amazed what a difference it makes.
Pros: Clear highs,tight bass...all in all sweet sounding machine
Cons: relays...it seems they are not of first quality ...here should Yamaha take good old school
5 of 6 found this helpful
This is a beast that will take you to class on how to learn to listen all over again. Your music will come to life with so much more depth than you cam imagine. The way the amp pumps bass is so powerful with great mid range and treble. This amp creates sound imagery. A class all by itself.
Pros: clarity, big base, mid range , treble
Cons: overheats if there isn't enough air
1 of 1 found this helpful
Great sound ,brilliant amplifier with huge dynamic bass .Clean,warm,,crystal clear highs and smooth mids but mind the fact to separate power cord of the amplifier from all other power cords you might have around near as it influence the sound very much - the highs are less clear and smooth while mids get unpleasant - so put power cord as far as possible from all other power cord....I almost sold the 2100 thinking it was bad sounding amp but discovered- thanks God - it was all about power cord
4 of 6 found this helpful
I've had the 2100 now for a few weeks, and I couldn't be happier. This is an amp for grown ups. The richness of the sound is fabulous, bringing depth and contour to all of my favorite Be-Bop and Hard Bop, alongside early Baroque and classical guitar instrumentals. As you'll see from others, the unit is built like a tank, but its smoothness belies the hardened construction. It's worth noting that I've so far run it entirely "flat." There's just no need to engage the bass or treble - the sound is so pure that one doesn't need to edge it up or down, either high or low. I listen to CDs and HD Radio, which both sound beautifully clean. Can't wait for my new Salk Song Towers to arrive to see what it does with them. Absolutely recommend. Would be well worth twice the price. Oh, and Crutchfield is great. Packaging was careful and delivery spot on time.
Pros: Pure sound reproduction. Which is what we're all after. Powerful, yet gently smooth.
Cons: Somewhat large increments in volume adjustment with the remote. But it's a very minor point.
2 of 2 found this helpful
The sound quality of the A-S2100 is fantastic. This thing has some balls. I have an amp that is rated at 140 watts, and the Yamaha blows it away. The sound is dynamic and very realistic. High end sound at mid-fi price.
1 of 2 found this helpful
Ordered this integrated amplifier upon staff advice. I told staff that I wanted to run two pairs of Bose 901 speakers and that I would require equipment with power, tape monitor circuit or main pre amp in and out for the equalizer. When the amp arrived and I hooked it up I was disappointed that it would not function with the Bose equalizer. The amp in and out were not true in and out and while there was plenty of power the sound was horrible. I reordered a separate pre amp and amp and am awaiting its arrival--hoping that it will work. My twenty year Onkyo is on its last days but does run the equalizer to make the speakers sound terrific
1 of 32 found this helpful
The best bargain in the Yamaha S line is the 2100 no doubts. However, the next model up, the flagship A S-3000 is in a league of it's own. Describing it and reducing it to a few parts, copper and features difference here and there cannot have been made by someone who actually listened to both carefully as I did. Best sound for the money stays with the 2100, a terrific buy. But if you can afford it, the A S-3000 is the truly magical one. I've sold my more expensive amplifier to get the 3000....it is that good.
5 of 6 found this helpful
As one who pursues my hobbies with vigor, I tend toward the pursuit of perfection. That said, I enjoyed my Yamaha A-S2000 thoroughly over the past couple years. Despite the satisfaction, I could not help but wonder if the new A-S2100 might represent an upgrade. I made the purchase and I am very happy I did. Admittedly, the cost is much higher and we have one of those diminishing return factors here but it is closer to perfection. As others have reported, I also find more resolved deeper warmer richer base, sweet mid-range and more defined high frequency sparkle with better realism. The remote control is better built and offers a few more features and there are numerous other small benefits around the whole system. I heartily endorse the Yamaha A-S series of high-end amplifiers as worthy of investment and this model is the best I have tried in my pursuit of excellence. Crutchfield is also a great company that backs their products with a satisfaction guarantee--buy this amplifier from them without fear.
Pros: quality, full-scale music reproduction, built to last a lifetime. Pairs well with my Benchmark Media DAC2 and Goldenear Triton 1 speakers.
Cons: Very heavy at over 51 pounds, requires a good deal of cabinet depth
6 of 7 found this helpful
I've owned the A-S2100 for a few months and this thing is amazing! Never thought i'd get so much pleasure out of a "generic brand" IA, but this unit schooled everything else I checked out. I love the retro metered look, and its sturdy design. I considered going with a Macintosh, but glad I went this route (purchased a Sony HAP-Z1ES with the coin I saved). Great soundstage,headphone amp,and vinyl sounds exceptional as well. I initially thought it sounded a little "stiff", but the more broken in it gets,the better it sounds. Hats off to Yamaha for building a great amp for the $$. This 1000lb gorilla's a keeper!
Pros: sound,brand quality.
Cons: Wish the power cord was hardwired, but it seems everything is plugged these days. 2nd RCA output would have been nice.
3 of 4 found this helpful
This amplifier personifies the return to our senses.No more multi channel confusion.Pure sonic bliss out of two speakers.The heart beating life into my sole is now the wonderful Yamaha s2100.So clean ,natural and smooth,yet powerful. This will serve my Sony Hap Z1ES and Yamaha cd s2100 player to my ultimate [well almost] pleasure. Oh ,and dang it is so handsome.
Pros: Very much a high end market product. If this were 10,000.00 product it would still be a great value
Cons: NO cons
5 of 6 found this helpful
Just replaced my Sony STDR 5800ES receiver and replaced it with the A-S2100. Right out of the box it put the Sony to shame. Bass was noticeably improved, richer, tighter and much more inner detail. Imaging was 3 dimensional and nearly holographic. The treble was smooth and detailed, much better than I have ever had at home before. While playing c beautiful cello piece from my CD player, I enjoyed stunning and realistic reproduction of the instruments, right down to nearly feeling the presence of instruments in my room. I also tried the headphone output, and again I expirenced the same audio qualities I heard from my speakers. In fact, the Yamaha easily bested my SPL Phonitor 2 headphone amp. (I'm using the AKG K812). Haven't tried vinyl yet, but will this weekend. All in all, I couldn't be happier with not only the sound quality, but also the heavy duty build quality and beauty of the unit itself. VU meter is also a classic touch to this modern day integrated amp. Highly recommended.
Pros: Superb Stereo sound.
18 of 18 found this helpful
Not bad, but overpriced especially in terms of power. Shop around and compare, there are many excellent ones with fair price.
4 of 43 found this helpful
This amp is built like a tank with style. it weighs in at 50+ lbs but it looks delicate to the touch with finesse on its retro good looks. Its very old school with none of the modern goodies that todays amp has, every penny was given to its sound quality which this amp has in spades. This is an amp year for me and i bought a few amps to mess with and this is the winner for me in overall sound with my speakers. better than my Hegel 160 ! better than my Teac 3000 and better than my Parasound Halo. I Bought the CD2100 to go with it and it sounds fantastic! Better than my Oppo , Teac and Ayon combo. VFM at this high price is still a good buy and just for comparison sake its on par with my Devialet 120 and Ayon sprit 3. After reading the other review I'm heading off to get a AS 2000 to use it for bi amping.
Pros: good bass, silky mids and highs, very airy sounding and looks to cool for school. Excellent with Kef LS 50
Cons: gets fingerprints easy
18 of 60 found this helpful
The Yamaha A-S2100 (purchased in May 2015) is for lack of better words, Totally Awesome!! The Bass is tight, clean and powerful. Mids and Highs are smooth as silk. The Soundstage is Deep and Wide. No need for separates with this BEAST! I also own the Yamaha A-S2000 (it has conventional Transistors not MOSFETS) which I purchased in May of 2014. This unit is also exceptional. Bass is comparable to the A-S2100. However, when it comes to the Mids, Highs and Soundstage, this is where the A-S2100 really excels over the A-S2000, and significantly! I would attribute this to the fact that the A-S2100 is using MOSFETS (same as the flagship A-S3000) and has also carried over other attributes from the A-S3000. I have the Polk LSIM-707 Speakers (Awesome!) and I'm now bi-amping my system: using the new A-S2100 for Mids & Highs and the A-S2000 to drive the bass. The perfomance is unbelievable! Additionally, the VU meters and high gloss real wood sides of the A-S2100 are "icing on the cake" You'd have to spend $10k+ from the "boutique" manufacturers to get comparable performance and build quality that you get from Yamaha for the A-S2100. Keep your eye out for "open box" or "scratch & dent" and you really WIN! :-) UPDATED 7/6/16: After owning the Yamaha A-S2100 for a year now, I'm still amazed at the perfermance of this integrated Amplifier. It is an absolute Gem! Furthermore, after reviewing the schematics of the A-S2100 V.S the Flagship A-S3000, there is virtually little difference in the two units. The differences are: the A-S3000 has larger meters, toroidal transformer, additional copper shielding and 2 sets of additional balanced line inputs. Unless you have money to burn, my recommendation is the A-S2100 as there will be little or no sound perfermance improvement between the Flagship A-S3000 and A-S2100.
Pros: Flawless Sound. Exceptional Build Quality. I ordered "Scratch & Dent", all I could find was (1) one small, 1mm (0.040") slight scuff on the right side panel. UPDATED 7/6/16: Excellent Sound quality! Top notch build quality! Ultra Smooth and detailed Highs, precise mids, deep tight bass and spectacular wide and deep soundfield!
Cons: No tape loop for EQ. UPDATED 7/6/16: None. I've solved the lack of a tape loop for EQ.
21 of 22 found this helpful
The best I ever had (after a Sony, Denon and Marantz PM8000. It's even better than a more expensive new Marantz, see also a test in Audio, a German magazine. I am using it with an Arcam iRcan DAC and Pure Music.
11 of 12 found this helpful
More details on the Yamaha A-S2100
Features & specs
|Watts RMS per Channel (8-ohms)||90|
|Watts RMS per Channel (6-ohms)||Not given|
|Watts RMS per Channel (4-ohms)||150|
|Minimum Impedance||4 ohms|
|Signal to Noise Ratio||103|
|Digital Music Features|
|Built-in DAC (Digital to Analog Converter)||No|
|High-resolution Audio Playback||No|
|Total Analog Inputs||7|
|Optical Digital Inputs||No|
|Coaxial Digital Inputs||No|
|Dimensions and Warranty|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Floating & Balanced Power Amplifier with MOSFETs: The basic design of the power amp circuit adopts Yamaha's own, uniquely developed Floating and Balanced Power Amplifier technology. Adopting output elements with the same polarity on the plus and minus sides of the output stage, and also completely separating the NFB (Negative Feedback) circuit and power supply into total of four plus and minus sides of the left and right channels, results in thoroughly symmetric push-pull operation of the output stage. Completely floating the entire power amp circuit from the ground removes any negative impact of minute voltage fluctuations or ground noise. Moreover, the output elements are comprised of MOSFETs, which provide a warm and natural sonic character. The use of MOSFETs, which have the same polarity on the plus and minus sides, further evolves the ideal of a complete symmetrical design, to eliminate sound quality variations due to difference in polarity-a major distinguishing characteristic of the Floating and Balanced Power Amplifier-resulting in sound with a superior signal-to-noise ratio and superbly well-defined sound field.
All-Stage Full Discrete Construction, Balanced Transmission, and Low Impedance Design: The A-S2100 has achieved a fully discrete configuration during tone defeat, by thoroughly separating the tone control circuit from the signal system. This not only increases response but also improves slew-rate, and results in high range reproduction of greater vitality, richness and smoothness. Signal transmission and amplification features fully balanced transmission for thoroughly balanced operation, even of the control system circuitry. Signal loss through transmission has been significantly reduced, with the application of screw clamp connections and thick cables in connecting the pre amp unit with the power amp unit, which is vital for signal transmission, and in connecting the power step to the speaker terminals. This improves the damping factor and improves driver capacity and damping power of the speaker, resulting in vibrant and powerful bass reproduction.
High-Quality Electronic Volume Control: Yamaha utilizes a high-quality digital volume control specially designed by New Japan Radio Co., Ltd., which consists only of ladder-type resistance, removing the impact of slew-rate decline or coloring of the sound, delivering higher purity in the sound, and excellent, fast response to large volume changes and steep transients. Moreover, the tone controls employ a triple-parallel method, minimizing the detrimental impact on sound quality seen with straight-line tone controls. In addition, the bass, treble, and common circuits each utilize simple construction in which the NFB of the amp is not used and the CR elements are simply fixed in a straight line, ensuring exceptionally pure sound reproduction even when tone control is applied and superb response to audio signal transients. When tone defeat is applied, straight signal flow from only one volume circuit to a discrete configuration buffer amp is realized.
Large Capacity Power Supply: The A-S2100 employs an original EI transformer, carefully customized for optimum compatibility with the chassis. Combining four large capacity carbon sheath block capacitors delivers an energetic sound, even during high volume, that is possible only with the A-S2100. Moreover, since the control amp and control system is equipped with twelve shunt type local regulators that prevent deterioration caused by currency fluctuation, a clean and stable power supply is achieved. The EI transformer is mounted on the chassis using brass washers, restricting internal vibration that would result in noise.
Symmetrical Design: The left-right symmetrical construction with the power supply in the center and the power amp blocks on the ends achieves greater separation of the left and right channels (necessary for proper two-channel stereo reproduction) and ideal weight balance. Including fine tuning by a centre frame which extends from the front to the back of the casing, the A-S2100 has superb mechanical rigidity and installation stability that dramatically lessens the impact of external vibrations on sound quality.
Metal & Real Wood Construction: The refined design and construction of the A-S2100 reflects Yamaha's commitment to fine craftsmanship and art, uniquely drawing on its long experience as a world-class musical instrument maker. The metal front panel and the side wood panels have been beautifully integrated by the masterful use of advanced processing technology. Moreover, the dials and tone controls are machined aluminum knobs, for a richly textured finish and graceful touch.
Feet Insulators The insulators are crucial parts that block outside vibrations. They adopt Yamaha's original metal legs in order to maximize vibration control performance. The user can select point installation by applying the supplied spikes or plane insulation with the supplied pads, and use these combined with an interlocking rack if desired.
Balanced & Unbalanced Analog Inputs: The Yamaha A-S2100 integrated amplifier is fitted with both balanced & unbalanced analog inputs.
- Balanced XLR: The Yamaha A-S21000 features a set of balanced XLR inputs for connecting a high-end audio component, such as Yamaha's CD-S2100 CD player (sold separately). You can adjust the Attenuation and Phase of the XLR input.
- Unbalanced RCA: The Yamaha A-S2100 is equipped with six unbalanced analog RCA stereo inputs for connecting an external audio source such as a CD player, AM/FM tuner, Turntable, and/or cassette deck; as well a preamp or AV receiver. There is also one analog RCA stereo output for recording through the amplifier.
Main Direct Input: One of the A-S2100's analog inputs is labeled Main Direct Input. This input allows you to connect your preamplifier or AV receiver directly to the A-S2100 and use the Yamaha stereo amplifier as a power amplifier to drive a pair of speakers in your system.
Note: Audio signal coming into the amplifier's Main Direct Input is only output through the speaker outputs of the A-S2100. No audio signal will by output from the stereo amplifier's Pre-Out, Rec Out, or Headphone Output.
Discrete Phono Amp: The phono amp is comprised of an MC head amp and an equalizer amp, each of which are discretely configured, resulting in a rich sound with pronounced musicality, when playing vinyl records with both MC and MM phone cartridges. The unit's Phono input consists of stereo RCA jacks and a ground terminal.
Binding-Post Speaker Terminals: Yamaha's meticulous obsession with quality continues through to the speaker terminals, which are the last and crucial link in the audio chain. Featuring two sets of binding-post speaker terminals (A&B) with originally designed handles; these are created by cutting pure brass enabling secure connection with no reduction in sound quality. Contoured to the shape of human fingers, they not only look beautiful, but can be turned easily and fastened tightly with minimal effort. They are also compatible with connections using banana plugs.
Note: You can use the A & B speaker outputs to power two pair of separate speakers or you can bi-wire a single pair of speakers. If you use two sets (A and B) of speaker, the impedance of each speaker must be 8-ohm or higher. When only using one set of speakers (A or B), use speakers with an impedance of 4-ohm or higher.
Headphone Amp: The headphone amp is also equipped with fully discrete configuration, for preeminent drivability and damping properties. Included as well is a specialized level trimmer that responds to various load impedances. The unit's headphone amp uses a front-panel 1/4" headphone jack for connecting a pair of headphones (sold separately). Once a set of headphones are connected, the amplifier's speaker outputs mute automatically.
Note: The headphone amp does not function for the amplifier's Main Direct Input.
Pre-Outs: The Yamaha integrated amplifier is equipped with a stereo preamp output for connecting a powered subwoofer or to use the A-S2100 as a preamplifier and connect it to a larger power amplifier to power your speakers.
Trigger Input + Remote Input/Output: The A-S2100 features a 12V trigger input (3.5mm) to synchronize power on /off with another component that features a 12V trigger output. The integrated amp also has remote input and remote output minijack terminals for use with external IR receivers and compatible Yamaha components.
Remote Control: The supplied remote control features a design complementary to the aluminum panel of the amplifier itself, with a simple, easy-to-understand button layout and metallic texture. In addition to the basic volume adjustment and input switching controls of the A-S2100, it can also be used for operation of the companion CD-S2100 CD player (sold separately).
Front-Panel Controls: The integrated amplifier also offers the following convenient front-panel controls.
- Volume: Controls amplifier's output volume level. The volume control does not effect the amplifiers Main Direct Input or Record Output.
- Input Select:
- Speakers: The Speaker Selector switch allows you to select only A speakers, only B speakers, A+B speakers, Bi-Wire, or no speakers; so you can control which speakers are playing.
- Trim: Adjusts the volume level when headphones are plugged in to avoid sudden changes in volume. Choose from -6, 0, +6, or + 12 dB.
- Tone Control: Adjustable Bass (+/-10dB), Treble (+/-10dB), and Balance (L-R). The tone controls do not effect the amplifiers Main Direct Input or Record Output.
- Meter: Switches the meter display between Off (no meter), Peak (peak level), or VU (volume unit).
- Phono Switch: Selects the type of turntable (MM or MC) connected to the integrated amp's phono input.
- Audio Mute: Reduces the current volume level by approximately 20 dB.
Front-Panel Level Meters: The center of the main unit features level meters that provide visual enjoyment of the music as well, with the rapid and delicate movement of the needles. The meter is illuminated softly from inside by LED, giving a warm, beautiful lamplight look. The meter indicators can, along with VU display, be switched to peak display, and can be selected according to your preferences. The window of the meters has been precision-fit to the panel for an elegantly beautiful appearance.
Auto Power Standby: The unit enter standby mode automatically if not operate for approximately 8 hours.
Q Crutchfield asked: Why did you buy this?