Tag Archives: preamp

Harman Kardon Citation Seventeen S Preamplifier

2 Apr

Harman Kardon Citation 17s

Harman Kardon Citation Seventeen S Preamplifier

The HK Seventeen S preamplifier was the last preamp made by Harman Kardon before the sale to the current owners, Beatrice Ford, and was the last piece that was made in the USA.

The volume pot is a 32-step / fixed-resistors attenuator while the headphones is fed by the connected power amp's loop through, allowing direct speaker selection from the Seventeen as well. Reaction to square waves is exemplary and the phono stage is difficult to overload.



Mcintosh C24 Preamplifier

31 Aug

Mcintosh C24 Preamplifier

Mcintosh C24 Preamplifier (1964-1970, 249.95 USD MSRP )


10D01 - 54D30  5,148 Units Produced


Dynaco PAT-5 Stereo Preamplifier

10 Jun

Dynaco Pat-5 Preamplifier

Dynaco PAT-5 Stereo Preamplifier (1974 MSRP  $239 Kit, $399 Built)

Dyna's replacement for the venerable PAT-4, adding such niceties as a high-power switchable outlet, speaker selector and terminals, dual tape monitors, an external "processor loop" intended for EQs or other signal modifiers, and an op-amp high-level stage. The BI-FET term is a trademark of National Semiconductor for the JFET LF357H IC used in the PAT-5 BI-FET version. This replaced the NS LM301 opamp in the PAT-5 preamp in 1977, opening the door for numerous audiophile mods including the highly acclaimed Frank Van Alstine and Walt Jung upgrades.


Semiconductor complement: 13 transistors; 2 integrated circuits; 3 zener diodes; 4 diodes.

Dimensions: 13-1/2" x 4-1/4" by 11-3/4".

Power Consumption: 12 watts, 120V or 240V, 50/60 Hz AC.

Shipping Weight: 13 lbs. (5.9 kilos)

Designed by:

Wade Burns



McIntosh C-20 Stereo Compensator / Preamplifier

17 Apr

Mcintosh C20 Preamplifier

Image Credit: Starsky on eBay


McIntosh C-20 Stereo Compensator / Preamplifier (1959-1963)

Retail price $269.00 in 1959.

"Simplicity, flexibility, and beauty have been integrated by careful engineering and design in the McIntosh C-20 Stereo Compensator. The greatest listening pleasure in stereo or monophonic reproduction is assured as a result of over a year of careful and diligent research in hte requirements of a new preamplifier designed for stereo. Full stereo flexibility has been provided plus built in protection for your investment in monophonic records. McIntosh has designed in the C-20 Stereo Compensator the necessary features required to give the finest monophonic reproduction the keenest listener may require. Complete satisfaction is yours in monophonic and stereophonic with the McIntosh C-20 Stereo Compensator."

For Sale:   This Mcintosh C-20 is currently for sale on eBay via seller Starsky. Get your bids in now, auction ends April 23, 2014.