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Consecutive Serial Numbers Matter?

musichal

poet emeritus
I often see comments such as, "...these have consecutive serial numbers, for those who care about such things..." and I am one who does care. Especially for speakers like several Klipsch models with production eras measured in decades rather than years.

Don't get me wrong. I'm not saying I wouldn't buy speakers not consecutive (or very close to it), but I'd rather see it than not, for several reasons:

Having sold audio, I know that the store's orders were filled by speakers with consecutive numbers, and we took pains to place them in our storeroom so that as we sold them, we could keep consecutive numbers together. So assuming an owner took good care of them, and you are looking at them 15 years later, you know they were built at the same time, sold together, and are something of a matched pair.

They aren't likely to be different due to changes in parts over time. So the drivers should match, all the parts should match. If one has a woofer that appears different, then it was likely replaced. If SNs were far apart in this scenario, you don't know what differences might be the manufacturer's over time, or a cheapskate owner who put in a will-fit. Sure, you can perhaps research and figure such things out, but when deciding to buy or not on the spot, consecutively numbered speakers are a good sign, and make it easier to pull the trigger.

Of course, sometimes some noob salesman might forget to check, so maybe the numbers skip a few digits - at least they are very close and all the above advantages are in play. Speakers in very good condition obviously sell for more than those which aren't. For me, if they are also consecutively numbered and appear identical, that goes a long way toward justifying the ask.

I'm not saying that I wouldn't buy without very close or consecutive numbers, but I will expect to pay less in most such cases. Obviously there are exceptions.

I thought the guy's ask a bit high for the Khorns I bought [1976 pair, $2400]. I tried to get him down about ten percent, but he wasn't budging. The fact that they looked decent, looked identical, sounded right, and have consecutive SNs made the buy easier to justify.

Why would anyone not really care? Even to the guy who's just looking for a deal, it matters.
 
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Huh ... don't expect they'd sound any different one way or the other ... <G>

That said, it's not a bad idea to come close. Factories DO slipstream in design changes without changing the model number, and that could certainly factor into getting a good match on your system.
 
Some speakers were built before stereo became a feature, finding a pair of those with consecutive numbers might take a while.
 
Did you sell a truckload of one speaker during the Christmas rush? No way to keep the serial numbers consecutive in that load of product. But for a higher end offering, getting a couple few pairs at a time, this was not a problem. I'm surprised that my DQ-10s and L1590/2 don't have consecutive numbers. Close but not consecutive. I don't care, but would use it as a selling feature. For the DQs, one pair 4 digits off, one pair consecutive, I'm happy I have the numbers for both pair as these are frequently lost, a little chunk of paper glued to the back of one of the baffle boards up top. A puff of wind and away it goes. I don't think I have ever seen a pair of Advent Loudspeakers with consecutive numbers.
 
Got me wondering whether the McIntosh XR16's I've had for 30 years were sequentially numbered.

Yes they are.

Now I can go back to not giving a rodent's behind. ;-}
 
I know in the case of klipsch they use a process to match the veneer as close as possible for consecutive serial numbers. I believe each speaker moves down the line as a pair to make sure they are as close a match as possible. I don't think it's a requirement, just a plus
 
Not an issue with isoplanar designs.

gal_75407_4fe1fd1d38a8f.jpg


Definitely a good idea to check if the design is "mirrored", but that's more the exception than the rule.

494209-marantz_m10_speakersmirrored_euro_set.jpg


... and remember ... three lefts make a right! <G>
 
It always makes me laugh when someone selling anything in the KEF Reference range (I really don't know if this applies to all of their offerings) makes a special point of them having matching serial numbers,and then proceeds to make a big deal out of it. ALL pairs had matching serial numbers with an A and a B unit. The reason being that these are (so they say) sonically matched as pairs at the factory. In my case,when it comes to KEF at least,matching numbers is the only way to go.
 
Found a set of Infinity RS 4B's at a thrift and noticed after putting on new surrounds they had consecutive numbers, Now how lucky is that!
 
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Not an issue with isoplanar designs.

gal_75407_4fe1fd1d38a8f.jpg


Definitely a good idea to check if the design is "mirrored", but that's more the exception than the rule.

494209-marantz_m10_speakersmirrored_euro_set.jpg


... and remember ... three lefts make a right! <G>
NS-1000's are the same .. Same serial # with a L and R suffix.
 
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