DIY M19 idea's

[magnarc]

Guys,

The MR994 is the large CD horn for the small format drivers.
I have a pair and I like them. Larger than even the 511.

I think an M19 clone based on them would be cool.

But with that, the M19 is really a simple bass reflex bottom end, with the 811 horn and a pretty decent crossover. The cabs are way cool looking, but still just a basic BR.

That said, here are my 19's with the 994 on top just to play with.



If a guy had 19's, and wanted to build new tops, you could put this together.

Were I to start from scratch, I'd build duplicates, with ducted ports, use the -8B woofs and the 902-8a drivers.

Would be a fun project.

As it is, I love my 19's as modded. Look ma, no vanes in the 811's! Oh, I said I'd never mention that again....I lied!

Ron

Are you sure they aren't MRII594A's there, the ones that take 288 series drivers?

[les winter]

Thanks. Looks like I need to cut a few holes. !@#$#$%
Les

[GM]

Are you sure they aren't MRII594A's there, the ones that take 288 series drivers?

Hmm, IIRC the only difference between the two expansions is that the 594 is a truncated 994 to create a larger throat same as the 511E Vs 511B, so from the front you're not likely to notice which it is.

GM

[GM]

Thanks. Looks like I need to cut a few holes. !@#$#$%
Les

Note that this will tune the cab ~6 Hz lower with the existing 2" vent length if I did the math right, so removing the vents to create two slightly larger vents 3/4" deep should bring it back up close enough if the lower tuning leans the bass out too much for you.

GM

[bfish]

Hmm, IIRC the only difference between the two expansions is that the 594 is a truncated 994 to create a larger throat same as the 511E Vs 511B, so from the front you're not likely to notice which it is.

GM

Yep. The MRII594/MR994 share HxW dimensions, and only 7/10" difference in length.



(courtesy Lansing Heritage)

[bfish]

Once you slip a 994 in an ~M19 sized box and add the requisite shaping filter, you begin to notice it's more like an M500/9815/A-15 than an M19 (which isn't a bad thing at all). Then you get to longing for the extra ~octave a 3154 can get you, and you abandon the M19 altogether and build some modified M500s/9815s/A-15s.

All can be done with new GPA components too, save for the MR994...

[GM]

Yep, then all you need is a second 3154 in the M19's net Vb to get a SET friendly sensitivity.

GM

[bfish]

Or SS homewreckers.

[les winter]

Hello Russ.

May I ask one more question: is every wall, including the bottom and top of each enclosure, lined with fiber glass and to what thickness.

Many thanks.
Les

[RonSSS]

Are you sure they aren't MRII594A's there, the ones that take 288 series drivers?

Nope, these fit the small format drivers.

Ron