The Holy Grail of Marantz Tube components (NOW SOLD)

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The Holy Grail of Marantz tube components have arrived in my shop. ( I will be taking this post down soon, this package just SOLD, January 5th 2017)

This will be sold only as a full set

(2) Marantz model 2 amplifiers (These are cosmetically mint and close serial numbers)
(2) Marantz Model 1 Consolette pre-amplifiers (These are cosmetically mint and close serial numbers)
(1) Marantz model 6 (this is the accessory unit that ties the two mono pre-amplifiers together to work as one stereo pre-amplifier (Cosmetically mint)

(2) power supplies for the Model one pre-amplifiers (MINT) not pictured

Price for package restored $ 20,000 FIRM

This is one of the nicest and most mint sets I have had in years!    serious inquiries only

The above is now sold , but I wanted to leave the post up for a while to show the fine components I get in the shop, I will be expanding this website in the year 2017 this will include an easy to see and view posted (page specific) on each component I get in and place up for sale. Please remember me when any of your vintage components need repairs or restoration too.


This Marantz set sold only as a set ( I will be taking this post down soon, this package just SOLD, Dec 23, 2016)

(1) Marantz 8B amplifier (This is close to Mint just a few very small pint nicks) functions perfect, never serviced                                                 (1) Marantz 7C pre-amplifier (This is very close to mint, note some tiny what appears to be light finger nail scratches at knob  selector areas and some very tiny (not visible a foot away) cosmetically abut a 9.5 will clean up nice. never serviced its original                                                                                                                                                                                                                                                                                                         (1) Marantz 10B tuner (This will be getting a new face dial glass, otherwise its face-plate is near mint and chassis is  not corroded it looks new) come with cabinet

This group above is being sold as a set for $ 9995.00

I will carefully pack each unit and insure via FedEx as the shipper USA shipping destination only, buyer will incur packing and shipping insurance costs

Payment only by Bank Cashiers Check or Certified Bank Check (verifiable) all funds must arrive in advance and clear before shipping out

Please contact me for any questions details and more information about these very rare Marantz Components

The above is now sold , but I wanted to leave the post up for a while to show the fine components I get in the shop, I will be expanding this website in the year 2017 this will include an easy to see and view posted (page specific) on each component I get in and place up for sale. Please remember me when any of your vintage components need repairs or restoration too.

Cheers, Dr. Tubeology




Changes on the wind………………………….

Classic Tube Audio is growing!, now gong into our 44 th year, our shop work space is busting at the seams. You know what that means ?, cleaning up and reorganizing it’s just not working anymore. So with that said a new shop is in order and in the works over the next 60 days we are constructing our dream lab.

I will be sacrificing a lot of electronics in the process, I do not wish to move all this heavy electronics audio inventory. Below is a partial list. no sane offer refused. Yes sane, do not insult me or yourself by being a low-baller. I will tell you to go pound sand.. Ha Ha. But if you are fair with me I will be in kind to you.

As we move toward the build out of the shop I will post progress reports. With the new shop comes changes with me I will be spending a lot more time on the bench so I will be expanding my offerings service wise taking in more work. Turnaround times will improve, as to quality of work no changes we already are #1 top rated in the good old USA we live and breathe vacuum tube Hi-Fi, new old in-between………

Dr Tubeology

Tube whisperer

New Arrivals, 
1)     McIntosh 2505 stereo amplifier, just serviced works perfect clean and in great condition $ 900.00

 1)     Pair Marantz Model 5 Tube mono-Block amplifiers EL 34   Tube (RARE) As-Is non restored, SOLD 8-2016

1)     McIntosh Model MC30 mono amplifier (Tube)

1)     McIntosh C8 Mono Pre-amplifier (Tube) ($ 395.00 as-is)



Very Rare Audiophile Amplifiers:


1) Futterman OTL 3 Complete (mono-bloc pair) restored and for sale (RARE) $ 2500.00 the pair (SOLD 8-2016)

(just changed the price as I installed a better set of close matched output tubes and also did a few circuit revisions, they are functioning better than new!, I was able to lower the distortion even more with some additional bypassing of the power supply)


1) Mr. Liang 845 amplifier ($ 500.00) Mint and functions perfect

2) McIntosh C20 pre-amplifier (1) sold 4/2016) (2nd one SOLD 8-2016)

1) McIntosh MR65B FM Stereo tuner (Ready to go and complete with original packing and box and documents)

1) Celestion SL600 bookshelf speakers (Pair)rough (Sold 7-2-2016)

1) Marantz 10B FM Stereo tuner (This will go into Q for full rebuild) ($ 2000.00)

1) Adcom GTP500 stereo Pre-Amplifier/Tuner/With phono (150.00)

1) Linn Basik LV X arm looks to be (new in box) with new Linn cartridge in headshell $ 600.00

1) McIntosh MC275 (to restore yet with new chassis and rebuilt electronics $ 4,000) or as is $ 2500.00 (SOLD)

3) McIntosh MR71 (One sold 5/2016 (2nd sold 6/2016) (1) Left, its in ok condition about a 4 on the scale, $ 150.00 as is

1) Marantz Model 8b Stereo Tube Amplifier (as-is $ 1500.00)

3) McIntosh MC240’s (2 sold 03-2016)(one sold 04-2016) 3 left

4) McIntosh MC30’s (2 sold 3-2016)

1) McIntosh C20 ($ 2100.00) (Near mint) all documents Never touched as it was originally works perfect

2) McIntosh MC2505 (MINT, 10 on the scale fully 100% operating $ 1100.00) (One Sold 5/2016), One I’m servicing, last one ready to go 8-8-2016
1) McIntosh 2505 stereo amplifier, just serviced works perfect clean and in great condition $ 900.00

2) McIntosh MR67

1) McIntosh 1700 (near mint $ 700.00) SOLD 8-8-2016

3) McIntosh C24, C26, C28 (1 each) (1 c26 sold 03-2016)

1) McIntosh MR500

1) McIntosh MR78 (gets new face glass and re-aligned $ 1100.00)

2) McIntosh MR74 (Sold 6-30-16) One MR74 left condition is 7.0 works fine

1) McIntosh MR500 Stereo FM Tuner

1) McIntosh MC2155 Stereo Power Amplifier ($ 1,000.00)

2) McIntosh MR 65 FM Stereo Tuner

1) Dual (United Audio) 1015 Turntable as is not tested, clean with manual (as-is $ 120.00)

1) Linn Sondek LP-12 Turntable with Ittok IV arm and Koestu Rosewood signature cartridge ($ 3500.00)

1) Michell “Micro” Turntable with Rega RB300 arm and Sumiko nude bluepoint (1200.00)

1)     Mono Marantz model 5 tube amplifier untested EL34 Tube clean (as-is 1500.00)


In the Q for rebuild

1) McIntosh C29 pre-amplifier, now in process

 More Hi-End and Audiophile electronics

 1) Pair Zu “Omen” larger book shelf speakers (no longer using I upgraded to large Zu’s) See website for details MINT $ 900.00

1) Bi-Frost DAC (Digital to analog converter) Mint with all UBER upgrades MINT $ 550.00

1) iFi Nano USB DAC mint all boxes and materials) $ 150.00 near brand new


 Many of the components offered are used in good working condition and bench checked (Trade-in’s and upgrades) My service is personal, professional and attentive, by appointment only. Please email me and I will be happy to follow up with you and set an appointment.

 See my extensive service and repair offerings on Craig’s list: Service’s offered (Small business ads section) check me out at:

Also Facebook at:

 **Our new offering is a home grown “Ultimate” 2A3 Vacuum Tube amplifier called the Truth; please see our direct website for more about this world class amplifier:, This year’s highlights. The CAS Stereo show in SF and received accolades as one of the best sounding systems at the show, Stereophile mentioned us as one of the top sounding systems, The Audio Traveler, noted at THE Show in Newport we were a show stopper. The NY Audio show, we just received the “Gold” award for one of the best sound rooms at the show. Soon to be revealed, “Product of the Year 2105” with a full review from

an internationally recognized hi-end audio publication, Tone Audio magazine’s premiere hard copy “printed” edition 


FORSALE – Pair of Heathkit W7-A – Super Rare & Super Mint

Each of these amps have had the following work completed by Classic Tube Audio.
You can own these for $995.00 + Shipping

  • New Power Supply Caps
  • New Bias Supply Caps
  • New Diodes in Power Supply and Bias Supply
  • All New Coupling Caps
  • New Thermistors for controlled slow start
  • Checked all of the critical resistors to make sure they are within Spec
  • New JJ El34 power tubes
  • NOS Used Tested 87% Matched 6an8 Driver Tubes

Chassis buffed and waxed and all pots cleaned with de-oxit

The only issue is one amp has a mismatched knob – I will include a matching knob so that both amps are exactly the same. –

Also one of the amps has a scratch by the plastic Heathkit logo maybe you can see it in the photos – or I can send you another photo of the scratch if you would like.

Overall this pair of Heathkits W7-A amps are about as mint as you can get all paint is shiny with a few minor scratches – (See photos).
The Cages are also very clean, however the cages do have a few scuffs and scratches.
see these on Ebay


Heathkit w7-A el34 monoblock with tube cage

They both function 100% and sound amazing. They are a loud 55 or so watts each.
The Balance and Bias Hold Perfectly !!!
These amps are super rare –



Underside of Restored Heathkit w7-A monoblock with new coupling caps

Pair heathkit W7-M

Mint Pair of Heathkit w7-A amplifiers 100% Restored


Super Clean Heathkit W7-A with JJ El34 tubes

Allied Knight-Kit km-15 mono amps X 2

I traded a 18 watt Marshall Clone amp for a pair of these super rare unbuilt Allied Knight-Kit KM-15 mono amps. The KM-15 is a small push pull amp. It has 2 inputs, a phono and tuner, and is rated at 12 watts RMS. The KM-15 uses a two 12ax7 tubes for the pre-amp and phase splitter, and 2 el84 (6bq5) tubes for the power amp section; and for rectification it uses a EZ81(6ca4) tube. See specs below.

As stated above these are un-built and came with everything as they did from the factory with the exception of the tubes. Someone went in and swapped out the original Mullard tubes and replaced them with some Sovtek (they are dated Jan, 1999 so they are even NOS at this point.

Now for the big question do I build them, or put them on Ebay? Part of me wants to build a vintage kit, I think it would be a hoot, on the other hand I have plenty of amps and have rebuilt several kit amps such as this pair of Heathkit w5m’s. – what should I do? Reply in the comments below.

And if you want to buy them and build them make me an offer.

new in box Knight-Kit KM15

I just opened the box

All the parts to build a pair of Knight Kit KM-15 mono amps - Mint and Un-Built

All the parts to build a pair of Knight Kit KM-15 mono amps – Mint and Un-Built

a close up of the chassis, mint original paint job

a close up of the chassis, mint original paint job


KM-15 Knight Kit amp new in box

All of the parts including the wire and hardware are still in neat little plastic bags with the Allied Knight Logo printed on them

Knight Kit KM-15

Inputs Tuner Input and Phono Input
Rated Power 12 Watts Continuous Sine-wave; 14watts IHMF
Peak Power 24 Watts; 48 Watts IHMF
Frequency Response + or – 1 1/2 db 30 to 15,000 cycles at 6 watts
Harmonic Distortion less than 1% at 12 watt, at 1kc (through the tuner input; Tone control settings normal)
Hum and Noise Better than 65db below 12 watts referred to 1 volt input at Tuner;Better than 45db below 12 watts, referred to 10mv input at Phono
Power Sensitivety 5mv at Phono input for 12 watts output1 volt at Tuner input for 12 watts output
Feedback 15db negative feedback
Controls Bass control: 9db of bass boost or cut at 40cpsTreble control: 9db of treble boost or cut at 10kcTuner or Phono selector switch

Volume control

Output inpedances 4, 8, and 16 ohm
Tube Complement 2 – el84/6bq62 – 12ax7 / ECC831 EZ81/6CA4 Rectifier
Power Consumption 50 Watts at 117 Volts, 60 cycle AC
Dimensions 5″ High, 91/2″ Wide, 6″ Deep

McIntosh MC30 Rebuild – Chassis Shots

Well, 2 installments in 2 days – WOW a record, I just started to gather parts, and I just got confirmation from the parts distributor that my Caps are on the way along with some of the odd value resistors that I didn’t have in stock. I also ordered a few different types of high end tube sockets, I wanted to see which ones looked / fitted the best in the chassis. I will be posting some photos of those as soon as they arrive. in the meantime here are a few more photos.

Once I have figured out a price for the ultimate pair of MC30’s I will be posting it but in the meantime you are free to contact me with any questions or requests along with any offers for the completed pair.

McIntosh MC30 Chrome Chassis Top View of Silk Screen Lettering

Nice and crisp lettering MC30 Chrome Chassis


Bottom Chassis with original serial number plate preserved under many many coats of automotive clear coat

McIntosh MC30 chassis parts ready for assembly

McIntosh MC 30 chrome chassis, bottom chassis and transformer ready for assembly

JUST IN !!!! McIntosh …….. Get your’s reserved now

We should have photos up soon, but I wanted to get these listed as they will go fast, you can by deposit reserve them now and we will build them to whatever restoration level you would like from just clean up and parts as needed to make nice functional units or more extreme, designer audiophile parts, special chrome and paint etc. To full “Maxx” restorations. We have just acquired the following (2) McIntosh MC60 Mono’s in a cosmetic condition of 8.5 out of 10 (1) McIntosh C20 in a cosmetic condition of 8  includes nice McIntosh wood cabinet. (1) McIntosh MR65 stereo FM tuner in a condition of 7.5

email us if you have interest in reserving any of these fine classics.. Thanks Pat~