Wyred 4 Sound ST-1000 570wpc amps-Great review out

The ST-1000 is a dual mono 570 watts per channel stereo power amplifier that does 1140 watts into 4 ohm loads.

The 1000 is a dual mono amp & the only parts shared by the two channels are the box and power cord.

In the 1st review of the ST-1000 Jerry in 10Audio.com says:
"Wyred 4 Sound ST-1000 stereo amplifier, we have a maturing technology that absolutely changes the performance-to-price expectation for solid-state amplifiers in the $2,000 to $10,000 price range."

He sums up with:
"Every other solid state amplifier under $10,000 has driven me away over a period from one evening to several months by their offenses. Even the Halcro MC20, with a trace of dryness or harmonic thinness in the upper frequencies, met its match with the big Marantz amps. The ST-1000 is not perfect, but it never actively offends, either. This technology sounds somewhat different than either tube or solid state, but after a short period of adjustment, it just sounds right. It certainly belongs on your radar if you are looking for an excellent sounding amplifier that just happens to offer exceptional value."

Read the entire review at:
http://www.10audio.com/wyred4sound_st1000.htm

In the August 2008 Ultimate AV review David Vaughn sums up his MC amp review with:
"In my time with this amp, I have been in audio heaven. When I review a product, I usually look forward to placing my own equipment back in my rack, but that wasn't the case here. After I reinstalled my Anthem, I instantly missed the Wyred 4 Sound, and I immediately put it on my short list of upgrades—it's that good."

Read the entire review at:
http://ultimateavmag.com/amplifiers/808wyred/

John Potis in Positive Feedback reviewed the smaller ST-500 and summed up with:
"in some ways the Wyred 4 Sound is a ground breaking accomplishment that'll bring a new level of power and sophistication to a budget conscious listening audience that could only dream of such performance before."

Read the entire review at:
http://www.positive-feedback.com/Issue39/wyred4sound.htm

Wyred 4 Sound amps are manufactured by Cullen Circuits of California. Doesn’t ring a bell? Cullen Circuits has been in business for 20 years years and has manufactured amplifiers and other electronics for the following: PS Audio, Ampzilla, Infinity, Genesis, BGW, Camelot, CAT and many more. Now are you staring to get the picture?

Wyred 4 Sound amplifiers are only sold Internet direct, and I am work with the factory. What this means to you is that there is no dealer mark-ups, and therefore, these amps are being sold at about 40%-60% less than competitive products with are all sold at substantially higher prices.

The ST-1000 uses the same ICE based amp power modules as the Jeff Rowland $6700.00 watt mono amps, the $6000.00 Red Dragon's and $4000.00 PS Audio's. They are then modified to sound better.

Modifications include extensive use of Dale resistors and Muse audiophile grade capacitors as well as other upgraded parts. These amps also feature a custom buffered dual FET input stage designed by Bascom King. This very high quality input stage has an input impedance of 61k to work with both solid state and tube preamps.

You will find all specifications listed below, but it is worth noting that these amps have a distortion level below 0.02% and a damping factor of 2000 for tremendous woofer control.

Sonics are exceptional with superb low level resolution, exceptional transparency and tremendous bass detail and extension. There are a number of big name 500 watt ICE based amps that have received Class A reviews all over the world. Rest assured that the ST-1000 is as good as the best and better than most.

See the technical info at the bottom of this ad.

All Wyred 4 Sound amps are Made in the USA (California) and come with a 3-year factory warranty.

Features are below this ad.

We accept Visa and MasterCard as well as money orders. Read our AudiogoN #1 rated feedback and then call us at 770-667-5633 to discuss these ultra high value products.

We ship Worldwide. 220-240 volt versions are available for export.
International sales are handled by bank funds wire transfer only.

ST-1000 stereo power Amplifier
- 570W into 8ohms (conservatively)1140w into 4 ohms
- 16.5"w x 4.25"h x 14.25"d
- Two ohm stable operation
- Balanced and unbalanced input
- Gold plated RCA inputs
- Custom buffered input stage w/61K ohm input impedance
- Custom designed insulated binding posts
- Dual mono design
- Two mono amps in one box
- Separate power supply for each channel for no crosstalk
- Extremely low noise
- Enhanced powerful bass
- Warm and inviting
- Very good low level resolution & detail
- Huge soundstage
- Excellent imaging
- Very low low distortion
- Powered by ICE POWER®.
- FULL OUTPUT THD+N - 83 % total efficiency @ FULL OUTPUT
- CCIF Intermodulation distortion = 0.002%, 19kHz/20kHz
- Damping factor = 2000, 100Hz, 8 ohm
- Factory Selectable mains 115/230VAC
- Stand-by power consumption 4.1W
- Thermal protection
- Over current protection
- DC output protection
- Sound optimized soft clip
- Rugged construction
- Laser Etched 3/8" Milled and Anodized Aluminum Front panel
- Custom insulated 5 way binding posts
- Gold plated unbalanced (RCA) inputs
- Neutrik Balanced (XLR) inputs
- Covered by a 3-YEAR WARRANTY

The following details some of the reasons why these amps outperform many of the big name competition. This was taken from an Internet post by Wyred 4 Sound:

There are many sonic differences with our amplifiers. The main reasons are held within our direct-coupled, balanced, dual FET input stage (input buffer). Not only does this raise the input impedance to 61.9K ohms which allows source equipment to easily and accurately drive the amplifier.The standard ICE modules which are found in the many other amplifiers have 8K ohms on the positive input and 10K ohms on the negative input to the ICE amp. So if you’re using RCA’s for instance, your source would be driving an 8,000 ohm load which isn’t really bad, but much harder to drive than 61.9K ohms. The lower impedance your source has to drive, the more you will experience lower volume levels, and slightly higher distortion going into your amplifier. This normally changes the way a preamp can amplify the signal applied, thus giving you less than optimal sound.

Balanced amplifiers (differential, driven from + and – signals) have a much better performance when driven balanced, which ours does. All the parts you will find on our input buffer are of the best quality. We use Dale Rn55D copper leaded resistors, Wima, and MUSE audio grade capacitors, and a thick traced PCB to connect everything. Audio signal doesn’t sound as good through standard magnetic steel leaded resistors, and electrolytic capacitors.

Inside the FETs on all of our input buffers, there is a voltage to current conversion. This is where we get the sweeter sound. The way a FET works is the current that flows from the output (the drain to source current) is controlled by the voltage on the input (the gate). This has a softening effect that complements the slight brightness and edgy sound of the Class D amplifier. It tends to make everything softer, smoother, and accurate. Given that the function of the amplifier, our input stage (buffer) has unity gain (no gain produced), and is ultra transparent.

We also perform modifications to the modules in every amplifier to enhance its’ performance. We bypass critical input coupling caps to allow audio to freely flow through while still allowing for DC protection, and “beef-up” the servo (feedback) circuit for enhanced bottom-end extension. Every module is connected to the binding posts with 14AWG 99.9% OFC high strand pure copper paralleled with 14AWG high strand PURE silver wire.

One of my favorite benefits with this amplifier is the sound stage, and AWESOME imaging. If the imaging is correct, you should be able to listen to your speakers R/L, and not hear each one as being separate. Instead, they should blend together and sound like one, half way between the two. Sound stage depths are also much more prominent. You should be able to hear differences vertically, horizontally, and even depth (front to back). Your speakers would obviously have to be able to produce these as well, but nearly all hi-end loudspeakers should be able to produce such results.

Our amplifiers have "tweaks" installed and are built to a much higher standard than other companies (most of which we also OEM manufacture for).

Brands carried:
Acoustic Zen, Audio Space tube electronics, Balanced Power Technologies, Bob Carver tube amps, Creek, Denon, Emerald Physics, Epos, Gallo, Gini Systems, Graham Slee, Jolida, LSA amps & speakers, Marantz Reference, Modwright, Music Hall, Okki Nokki record cleaners, Peachtree Audio, Project, PS Audio, PurePower APS, Quad, Raysonic, Rolls Bellari, SONOS, Spatial Computer, Spread Spectrum Technologies, VMPS Loudspeakers, Wadia, Wireworld, Wyred 4 Sound

Sales policies on our website at www.underwoodhifi.com