Many opamps are spec'd for 2kohms load. They may be capable of driving 600 ohm loads, but at the cost of reduced headroom and increased distortion.
True 600 ohm I/O is mostly found on legacy (old) equipment. Most modern gear should interface with whatever is patched into it, some legacy gear, may encounter issues.
Just to clarify, op amps specified to drive 2k ohm loads to full scale, will current limit (distort) before driving 600 ohms full scale.
I actually think there lying and it's the same 1k input as the mic. But now we're talking conspiracy.
Playing it safe, If we take lambda/10 as the cable length at which one should start considering an audio cable as a transmission line, at a frequency of 20 KHz, and considering, say, a propagation speed of 0.8Xc0, I would say that it requires a 1.2 km cable, or 0.75 mi for those of you who insist on being impractical (for the record, just kidding). So Duke is right.
That is correct. However, it should be noted that the main reason to terminate those pieces of equipment is not due to reflections in the cable/maximum power transfer as required in RF or even video equipment, but rather due to level matching and frequency response. If you don't happen to terminate them with 600 ohms, it is not as critical as, say, an RF power amplifier, which can melt down.
Whats worse than old archaic gear, is brand new gear masquerading as old...
You weren't a good designer then, good designers are those who use a lot of tubes, 600 inputs/outputs and warm musical transformers that give depth and completeness to the sound. [\satire]Whats worse than old archaic gear, is brand new gear masquerading as old...
Do whatever floats your boat...
Back when I was still designing gear, I made sure that serious audio outputs could drive 600 ohm loads, but I did not attempt to mimic 600 ohm source impedance.
JR
Are you serious or joking? Let's say you have a 6kW contract with the electricity company. You plug a 9kW range/oven. What happens?
Could you have some kind of scientific data, like something with figures, impedance, level, distortion...
That would be a Jeep, of course....
It would need to be amphibious, equipped with arctic equipment.
Forget all the reflectiving and terminations, etc.
1.5k-2k is a typical mic input (bridging) termination.
Agreed, they could probably re-issue the LA2 and so on without the low input Z, but they would have to do some modifications and people would probably claim "it is not the real deal". If it is not a re-issue of some old gear, I don't know why would someone would want to have 600 ohm impedances.
Don't you miss the good old days when they used to add a discrete push-pull stage to the outputs of a TL070 for it to be able to handle 600 ohm loads?
I don't think anybody's complaining at you, but rather at those who don't fully understand the reasons for this state of affairs.
I've used truckloads of 553x to drive 600 ohm lines.
Probably the best thing about the 'good old days' was the much greater reliance on actual musical talent rather than electronics that can turn a sow's ear into a silk purse.
