CJ ET250S - Owners please tell me about these amps ....

[joeinid]

I think they have been discontinued but look like they are still available. I've read great and good reviews and wonder from actual owners what you think. So please give us some guidance. Would you buy again? What don't you like and what do you love about it?

[joeinid]

ET250S and MET150 Enhanced Triode Amplifiers
	MET150 introduced February 2007 ET250S introduced May 2007
	The conrad-johnson Enhanced Triode (ET) Amplifiers are power amplifiers designed to capture the best attributes of both fine vacuum-tube designs and of the best solid-state designs. The ET250S is a 250-watt per channel stereo power amplifier, the MET150 a five-channel amplifier rated at 150 watts per channel. These sophisticated zero-feedback amplifiers offer the refinement of a vacuum-tube amplifier with the guts and control of a solid-state amplifier. Zero Feedback. Negative feedback is an engineering technique used to reduce measured distortion. While feedback does achieve this goal, it also introduces aberrations in the tran*sient response characteristics of the circuit. We have found that eliminating loop negative feedback can result in much finer gradations in dynamic response (micro-dynamics) and more accurate decay on musical transients. But eliminating negative feedback requires much more care in the design of the circuits - both in choosing devices and in power-supply design, and places greater demands on the parts. The Right Device for the Job. A power amplifier has two distinctly different functions. First, a voltage gain stage must increase the amplitude of the input signal by a factor of about thirty. The distortion characteristics of the amplifier are dominated by this stage. No device is better suited to accurately amplifying signals at high amplitude than triode vacuum tubes. For our enhanced triode amplifiers, voltage gain is provided by a 6922 vacuum tube, selected for its ability to track a high amplitude signal accurately. Theory and 30 years of experience have taught us that the voltage gain stage of a power amplifier dominates the sonic character of the critical mid-range of a power amplifier, and indeed these amplifiers exhibit the smooth, lucid midrange for which tube amplifiers are so highly esteemed. The high amplitude signal produced by the voltage gain stage must then be efficiently coupled to the loudspeaker system through an output stage to produce the power and control needed for a musically accurate response – basically to provide current gain and a low output impedance. High-current bi-polar devices have been specified for the output stages of these amplifiers, based on their extremely low output impedance and their ability to handle a great deal of current. This contributes the fast, weighty bass and seemingly limitless power reserve that are notable in these amplifiers. Solid Power Supplies. Rock solid power supplies are needed to enable the audio circuits to reach their potential on musical transients. The ET amplifiers feature oversized main power transformers (so that the circuits are not starved for current), and massive power storage reservoirs with high-speed capacitor shunts to deliver quick, even startling transient response. Carefully designed DC voltage regulators isolate the critical voltage gain stages to prevent demands of the output stage from modulating the input signal. Quality Parts. Conrad-Johnson components are internationally known for the quality of their parts, and the ET amplifiers are no exception. The audio circuits and their related power supplies utilize precision low inductance laser-trimmed metal foil resistors. The circuits employ polypropylene, polystyrene and Teflon capacitors extensively, except in the main power supply storage, where high-speed electrolytics are used because of the extremely high capacitance required. Precision-machined input/output connectors have been carefully selected for optimal sonic performance. Even the internal wiring is chosen on the basis of its sound quality in its specific application. Thoughtful engineering, specification of top quality component parts, and painstaking care taken in production make the MET150 and ET250S capable of extraordinary performance in music reproduction. We invite you to arrange an audition with your conrad-johnson dealer to confirm for yourself the extraordinary musicality of these amplifiers.
	Specifications Power: ET250S - 250 Watts per channel from 20 Hz to 20 KHz at no more than 2 % THD, both channels driven into 8 Ohms, or 400 watts per channel driven into 4 Ohms. MET150 – 5 x 150 Watts from 20 Hz to 20 kHz at no more than 2 % THD into 8 Ohms, or 5 x 250 Watts into 4 Ohms. Sensitivity: ET250S – 1.85V to rated power. MET150 - 1.5V to rated power. Frequency Response (at 10 Watts): 20 Hz to 20 kHz, +/- .25 dB Hum and Noise: 104 dB below rated power Input Impedance: 100 kOhms Tube Complement: ET250S - 2 x 6922 MET150 - 5 x 6922 Dimensions: ET250S and MET150 – 16.125D x 19W x 7.188H inches Weight: ET250S and MET150 – 65 Lbs.

[NorthStar]

Joe, I just love (immensely) your new avatar! ...Angels.

By the way, did you ever notice that mine is Tonto's (Johnny Depp) wife; from 'The Lone Ranger''s movie?
...Check that bird on top of her head, I believe to be also a crow! ...She's a Crow Indian.

[joeinid]

Thank you Bob!

[NorthStar]

Hey, I just tell it like it is. ...I believe to be the nicest avatar I've ever seen from an audio site.
...Singing sweet music just like angels do.

[dlb2]

Hey, I just tell it like it is. ...I believe to be the nicest avatar I've ever seen from an audio site.
...Singing sweet music just like angels do.

That sounds familiar.

[NorthStar]

That sounds familiar.

Sounds alright too?

* And now it's gone; of course.

[joeinid]

Sounds alright too?

* And now it's gone; of course.

Ha! It will come back.

[NorthStar]

Ha! It will come back.

----

[MrAcoustat]

Hey, I just tell it like it is. ...I believe to be the nicest avatar I've ever seen from an audio site.
...Singing sweet music just like angels do.

No it's maybe the 2nd nicest BUT not the #1 before i discovered panels i use to dig cans but i was pretty young back then i didn't know much.

IMG_3773.JPG

[MrAcoustat]

I think they have been discontinued but look like they are still available. I've read great and good reviews and wonder from actual owners what you think. So please give us some guidance. Would you buy again? What don't you like and what do you love about it?

There is one for sale in Montreal for about 4k in very good condition, it's a Conrad Johnson it can't be bad.

Occasions

[joeinid]

Thanks Andre. I'm pretty happy with what I have but I'd sure love to hear it in my system.

[CDLehner]

Ha...I was about to ask about this amp too; when I saw there was already a thread.

Problem is...LOTS of avatar talk; 250S...not so much