Art Dudley 

https://www.stereophile.com/content/listening-169

@jplunkettj

I have no experience with new Coincident Frankenstein stereo chassis amplifier. Word of mouth feedback says it’s very,very good. I’m an extremely happy owner of the Frankenstein MK II mono blocks bought new in 2009. My amplifiers use the 6EM7 (Driver tube) and the 5U4G as the rectifier tube.

The stereo version uses the6LS7 as a driver and the 5AR4 as rectifier. I don’t know what accounts for the different tube selection. I know that the late Art Dudley simply loved his Altecs paired with Shindo and other good quality SET amplifiers. They will be a different sound compared with your 6550 tubed push -pull class A/B Bob Latino 60 watt amplifier.

I believe that the Frankenstein will provide you with excellent transparency, inner detail, tactile presence and superb tonality. 8 watts of pure class A single ended topology. Your speakers are 16 ohm load which is terrific! My speakers are 14 ohm. I went from 100 watt KT 88/6550 mono blocks to the Frankensteins and have not looked back (14 years). It just depends on what sonic characteristics are most valued by you.

Charles

@lak 

👍 Congratulations!!!

With appropriately matched speakers you’ll have many years of superb music listening experiences to look forward to.

Charles 

Coincident Statement line stage (101D DHT tubes and transformer volume control).

Charles

@audiojan 

the Coincident’s are just more organic and natural. Significantly better low end and depth of soundstage. I would think the stereo amp is very similar 

I have not heard the Willsenton 300b SET amplifier. I do agree with the above description of the Frankenstein 300b mono block SET. I’ve owned the MK II model since 2009. In my opinion they are very authentic and natural in their presentation of recorded music. The antithesis of “electronic “ , contrived and canned sound. After 14 years of ownership I appreciate them more than ever.

Charles

That’s why I acknowledged that I don’t know how close the two Frankenstein models are. I do know that Israel Blume won’t present a new product to market if he does not think it is worthy. My suspicion is that it may not equal the mono block s exactly 100% (As is often the case between stereo and mono blocks) but knowing him , it will be very good. @paul_lindemann is very pleased with his stereo Frankenstein.

Charles

@lpretiring

A few years ago a friend had the Tekton Double Impacts and asked if I could bring my Frankenstein mono blocks over. I was happy to do so. The 8 watt SET drove his Double Impacts exceptionally well. No issues or strain/stress at all. His listening space is roughly 15x18 feet with 8 ft ceiling.

My Frankensteins lack a 4 ohm speaker tap. I have the early edition of this MK II (2009) amplifier which has 8 and 16 ohm taps. Newer models have 4 and 8 ohm taps. We used my 8 ohm tabs. So could potentially be even better matching with a 4 ohm tap.

These speakers are an easy load.
They are 4 ohm nominal but probably a very flat impedance curve and no steep phase angles to deal with. I don’t know how close the stereo version is to the mono block version however. If pretty close, then no problem.

Charles

I was looking hard at this amp about a year ago. I ended up going with the Tektron. Between 300B’s, 2A3’s, and 45’s, I prefer the 45’s. Looks like a great deal - enjoy

Any one of those 3 tubes is excellent with good amplifier implementation. You obviously have very efficient speakers if you are able to use the 45 tubes.

Charles

@sns

I know what you mean. Coincident does not do model changes or update models often. It was roughly 10 years between my original MK II Frankensteins and MK I Statement Line stage received updates. 13 years later and my early models are sounding fabulous! 😊 If the stereo amplifier is “close” to the sound quality of the mono blocks, this will be an exceptionally good deal.

Charles

Amplifiers

Frankenstein 300B Stereo Amplifier

Coincident is excited to introduce the newest addition to our series of power amplifiers - the Frankenstein 300B Stereo Amplifier. The Frankenstein 300B Stereo amplifier is the stereo version of the highly acclaimed Frankenstein M300B Mono Amps. The two Frankenstein amps share the exact same mirror finish stainless steel chassis, virtually the same design and circuitry and industry breakthrough performance. The differences are the Stereo amp uses the 6SL7 input tube instead of the 6EM7 and utilizes the 5AR4 rectifier instead of the 5U4GB. Both are all hardwired share the vast majority of components. The Frankenstein Stereo 300B will be the best constructed, finest performance and best value of any single ended 300B available. It represents a breakthrough at its reasonable price point.

Specifications

Output Power - 8 watts RMS SE class A
Output Impedance - 8 ohms
Frequency Response- 10hz- 20khz- +/- 1db
THD- less than 1% 20 hz - 20 kHz
Input Sensitivity - 800 MV full output
Input Impedance - 47K ohms
Power Requirements- AC 115V or 230V 50,60hz ( user selectable on the rear panel)
Dimensioin - 15” W x 12” D x 8.5” H
Net Weight - 17 kgs- 38 lbs.
Tube Compliment - 6SL7 x2, 300B x 2, 5AR4 x 1.

Price - $2499 US, All tubes included

WTF with $2500 retail price?

Yes, this is a new amplifier in the Coincident line. Stereo rather than mono block Frankensteins. The stereo version is using the 6SL7 as driver tubes, 6EM 7 is used as driver in the mono blocks. Not sure how long the 2500.00 introductory price will remain. A surprisingly low cost to get a single chassis Frankenstein 300b SET.

Charles

Likely, I will purchase the Frankie monos next month and compare them to Gordon's Wavelength Tritons
 

I look forward to your listening impressions. Two excellent 300b amplifiers, could not choose wrong with either one in my opinion.

Charles

@paul_lindemann

Good move and congratulations!!

I have been singing the praises of the Frankensteins mono blocks (And its sibling the Statement Line stage) since I purchased them new from Israel Blume 13 years ago. Both are superb and I understand your joy and admiration. What 300b tubes are you using? I have the EML XLS in mine. Apparently you have the new stereo single chassis version.

Charles