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Siemens - Klangfilm

Introduction / Overview

Klangfilm History

Moving Coil MC preamps

KLV Eurodyn Rack Amps

KLV Preamps

Output Transformers
Speakers
Siemens 2000 Amps

6SELA Preamps

6SELA Power Amps

6SELA Tuners

Spare Parts

Typical Tubes

Racks

Miscellanous

Projects

Eugen Bauer

 
  My personal KLV and 6SELA power amp ranking  

Several people asked me to give recommendations which power amp they should use. So I made this page. This represents my personal opinion using speakers which really do not need high input power... Anyway, I hope this helps...

Original

Sound quality using the amp in its unmodified (serviced) condition.

Parts

Stars for having (even) better parts - as MPs instead of electrolytics. The output transformers are neglected here.

Circuit

I like: Tube rectifiers, chokes in the power supply, moderate voltage designs, low feedback. I do not like: Too high B+, voltage doubling power supply designs, too much output power.

Final

This is my (very personal) opinion about the sonical quality of the model after having carried out the mentioned modifications.

Collection

Rare or hard to find model? Is it worth to collect this model for a special circuit design or other aspects or features? Nice looking?

  Model Picture Original Parts Circuit

Modifications

Final Collection  

KLV402

KLV403a

Klangfilm Siemens Eurodyn tube amp KLV V502 502 402 403 408a 410 409 551 **** ***** *****

Install an RCA jack input leading directly to the driver stage to omit the input stages.

***** *****  
KLV502 Klangfilm Siemens Eurodyn tube amp KLV V502 502 402 403 408a 410 409 551 **** ***** ***** Install an RCA jack input leading directly to the driver stage to omit the input stages. ***** ****  

KLV203

KLV204

KLV204a

Klangfilm Siemens Eurodyn tube amp KLV V502 502 402 403 408a 410 409 551 **** ***** **** Install an RCA jack input leading directly to the driver stage to omit the input stages. ***** *****  

KLV408

Klangfilm Siemens Eurodyn tube amp KLV V502 502 402 403 408a 410 409 551 *** **** **** Install an RCA jack input leading directly to the driver stage to omit the input stages. **** ****  

KLV408a

Klangfilm Siemens Eurodyn tube amp KLV V502 502 402 403 408a 410 409 551 *** **** **** Install an RCA jack input leading directly to the driver stage to omit the input stages. **** ***  
2765 Klangfilm Siemens 6SELA 2765 6S ELA 6 S ELA 2765 EL34 tube amp Röhrenverstärker tube classics - **** *** Output Transformer must be converted for low impedance speakers. Best for 16-32 Ohms. **** ***  
2805 Klangfilm Siemens 6SELA 2805 6S ELA 6 S ELA 2805 EL34 tube amp Röhrenverstärker tube classics - **** *** Output Transformer must be converted for low impedance speakers. *** **  

2798

(later)

Klangfilm Siemens 6SELA 2798 6S ELA 6 S ELA 2798 EL34 tube amp Röhrenverstärker tube classics - **** ** Output Transformer must be converted for low impedance speakers. *** **  
2796 Klangfilm Siemens 6SELA 2796 6S ELA 6 S ELA 2796 EL34 tube amp Röhrenverstärker tube classics

*

16-32 Ohm speakers

*** * Output Transformer should be converted for low impedance speakers. ** ****  

2797

Klangfilm Siemens 6SELA2797 6S ELA 6 S ELA 2797 EL34 tube amp Röhrenverstärker tube classics ** ***** **

Use the "inner" winding on the OPT (see OPT section).

714102/65/1849 = 71916-J102D999 OPT recommended!

**

(***)

**

(***)

 

2803

Klangfilm Siemens 6SELA 2803 6S ELA 6 S ELA 2803 EL34 tube amp Röhrenverstärker tube classics ** ***** **

Use the "inner" winding on the OPT (see OPT section).

714102/65/1849 = 71916-J102D999 OPT recommended!

**

(***)

**

(***)

 

2798

(early)98

Klangfilm Siemens 6SELA 2798 6S ELA 6 S ELA 2798 EL34 tube amp Röhrenverstärker tube classics ** **** **

Use the "inner" winding on the OPT (see OPT section).

714102/65/1849 = 71916-J102D999 OPT recommended!

**

(***)

**

 

KLV503

2737

2730

Klangfilm Siemens 6SELA 2737 6S ELA 6 S ELA 2737 EL34 tube amp Röhrenverstärker tube classics

- **** *****

New output transformer needed.

***** final possible !!!

Great base for DIY projects.

( - ) **  

KLV551

2735

2754

Siemens Klangfilm 6S ELA 6SELA 2427 2733 2735 2754 2803 2805 tube amp EL34 - **** ***

New output transformer needed.

*** final possible !!!

( - ) **  
                 
 

To compare:

       
 

Leak

ST20 ** ** *** Most TCC Metalmite caps are dead - the resistors drift ... ** **  
  Heath W5M *** *** **** Great OPT. Williamson circuit with too much feedback. Looks great! **** ***  
 

Dynaco

ST70 *** *** *** Nice OPTs. No real choke. 7199 = uncool tubes. *** **  
  Marantz 8b/8/5 *** *** **** Nice OPTs and bias meter. 6CG7 = uncool tubes. **** ***  
                 
 

Other comments:

       
   

- I have seen seen several KLV units (as V502) with blown power transformers. This is caused by connecting the units to 230V leads voltage (instead of 200V). I do not think the 6S ELA power transformers are really better.

- for being a single ended amp the sound of the KLV 203 can not be really compared with the others

- the Siemens Selenium rectifiers and also the electrolytic caps are of very nice quality (much better than Sprague or Mallory parts of the same age)

- the Siemens & Halske S-H resistors are still unreached in the world of vintage parts...

- the American / British amps got higher collection rates as I like their versability and the easy handling for their size and jacks

 
                 

 

               

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