JBL Studio 625C as LCR speaker?

[Stingber09]

Has anyone experienced or heard this speaker in vertical configuration?

I think it would be a good speaker for this job. I see it as a Studio 630 but with a slightly better dynamic in the mid-low range.

What are your thoughts?

Thanks

 

[staticV3]

It's an MTM speaker, with all the issues that comes with.

When used vertically, sit slightly above or below the tweeter axis and you'll be greeted by strong midrange suckout:


Even sitting perfectly on-axis, the floor- and ceiling bounce will contain that same suckout, coloring the in-room response.

 

[Stingber09]

@staticV3 Do you think these nulls can be mitigated with an active 2.5 way design and proper driver alignment at MLP? Thanks

 

[kyuu]

Ordinary 2-way bookshelves and floorstanders also have strong "suckouts" in the vertical axis. As an example:

There's good evidence that people are simply not that sensitive to the vertical off-axis reflections. Otherwise 90% of the speakers on the market would be a problem. As long as you're plus or minus 20-degrees vertically of the tweeter axis on an MTM (or other 2-way speaker), I don't think it will be an issue. In other words, the usual advise to get the tweeter at around ear height applies.

MTMs arranged vertically have a significant advantage over your average 2-way bookshelf design as the multiple drivers can handle a lot more power without distorting. Of course you can also get this with a floorstander that has multiple drivers.

 

[staticV3]

Ordinary 2-way bookshelves and floorstanders also have strong "suckouts" in the vertical axis. As an example:

That's a 2.5-way floorstander with four drivers.

Here's a normal 2-way bookshelf speaker:


And MTM for reference: