I'm think of buying a few 100' DB25-M to DB25-M snakes to go from splitters onstage to mic pres at record position. Anyone think that's a bad idea? Either because of durability or something else.
It seems somwhat precarious for some reason...
DB25s on stage? No freakin' way! The DB-25 is a non-professional connector, designed to be used in environment where it would not be regularly disconnected and reconnected, not subject to strain and protected from abuse. That's not an onstage environment. They might be suitable for inter-equipment connects inside a dedicated rack where they won't be moved or accessed very often but definitely NOT on a snake. They're too flimsy and they have no effective strain relief.
For a snake cable you'll want something like EDACs/ELCOs or those big, round MIL-spec Amphenols equipped with woven sdteel wire Kellams grip strain reliefs. There's also another big, blocky multipin that I've seen on a lot of snakes that I don't know the name of off hand, a call to a manufacturer of large touring consoles or a large sound reinforcement company can probably get you the name. (EDIT: I see thast sdome of the other guys have provided the names of other pro quality multipin connectors.)
All these connectors are much more expensive than DB25s, but they will not fail in the middle of the show and are highly unlikely to develop annoying intermittents, assuming they have been correctly assembled. Connectors on stage snakes HAVE to be able to take a beating on a regular basis without developing problems.
If you're connecting to gear that uses DB-25 for connections, run a short DB-25 cable to a panel in the rack with the mating connector to your snake on it. Don';t connect the DB-25 directly to the snake. Another benefit of doing it this way is that a DB-25 is only capable of handling eight 3 wire mic lines, so you'd need to have several DB connectors splitting out from the snake, which is an inmvitation to broken wires and chronic maintenance problems, whereas the larger professional multipin connectors can frequently handle up to 32 mic lines each on a 96 contact connector.
Even if this snake is to be used in a non-portable venue or studio installation I would still go with the professional quality connector - if you don't you'll regret it down the line. Re4mkember, snake cable is HEAVY and if the connector lacks adequate strain relief it will put undue stress on the wire-to-contact connections which WILL eventually result in failure or, if not, annoyingly flaky connections. It'll also make those chintzy screws holding the DB-25 plug to the socket REALLY difficult to unscrew.
On last thing I'd like to mention - you are NOT going to find real professional quality sound reinforcement or location recording gear at any of the well known, mass market gear outlets. You'll have to go to a real pro audio dealer who specializes in catering to commercial studios and remote trucks and sound reinforcement companies. Most of these dealers don't advertise a whole lot because people who are in their market generally know who they are. And, with a few exceptions, most of the gear you see advertised in the gear publications as "moist pro" isn't. Even if a mass market dealer sells stuff from a company with a reputation for heavy-duty studio or SR gear - for example SSL - (with the exception of outboard), they almost certainly don't carry the real top of the line pro stuff and in many (or most) cases can't get it because they're on a lower tier of the company's dealer network.