Sylvania6550 NOS Matched PairusedSylvania 6550 NOS Matched PairI found these in my temperature/humidity controlled storage room this past week along with several other tubes (listed on Audiogon!) I did not recall I had. This is a beautiful VERY hard to find ...299.95

Sylvania 6550 NOS Matched Pair

Listing ID: lisb2a99 Classified 
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Condition
10/10
Payment methods
Ships fromPrescott, AZ, 86305
Ships toUnited States
Package dimensionsunspecified
Shipping carrierUSPS
Shipping cost$23.00
Original accessoriesBox
AverageResearch Pricing

I found these in my temperature/humidity controlled storage room this past week along with several other tubes (listed on Audiogon!) I did not recall I had. 

This is a beautiful VERY hard to find Sylvania 6550 matched pair in OEM boxes.  Some shootouts have placed them just behind the venerable Tung-Sol Grey Plate early 1960's 6550 in terms of overall performance.  Lively, dynamic(!), open and pure with deep tight fast bass and open extended airy highs.  Midrange the classic NOS vacuum tube 6550 sound very, very close to the Tung-Sol.  This is why the Sylvania's are as hard to find in any decent condition any longer as the Tung-Sol's are.

Test Results:

Test Date: 01/01/2023

Tube 1

PC: 45.60
Gm: 4.79


Tube 2

PC: 47.50
Gm: 4.91

Matched to within 4% PC and 3% Gm!

Please see photos.  These are the classic three getter (two top, one side) Sylvania 6550 vacuum tubes with good silk screen lettering on them and still in OEM boxes (with some writing on them). Beautiful clean pins as well as clean flashings!

When one can find these, they're going for $300/each, $600/pair!  I know of only one tube seller that still has any stock left and he knows it. 

I have three listings (see other two on Audiogon) of pairs of these beauties and when they're gone, they are gone. 

Buyer pays shipping in USA (I do not ship outside USA).  I do combine shipping charges if more than one of my listings is purchased at a time!).

Please see my feedback and buy with confidence.

Thank you for viewing my listing!
 

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