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RE: 89db sensitivity and an 8-ohm load

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hahax@verizon.net

In Reply to: RE: 89db sensitivity and an 8-ohm load posted by farfetched on March 07, 2025 at 13:45:58

Just an off hand thought. Do the ML subs include a high pass filter. If so or if not and you can get a decent high pass at say 100 Hz you may be surprised. The little 5" woofer will be moving less than 1/4 as much and will be able to play much louder with the ML handling a bit more(hope it will go up to there). And there's a bonus the upper bass and mids from the 5" will be much cleaner, open and faster.

Adding a sub does a lot but adding it with a high pass filter(that many subs don't have unfortunately) does twice as much. I added large subs to a pair of SEAS froy 3 speakers at about 85 Hz so I know what a big deal it is.

Follow Ups:

RE: 89db sensitivity and an 8-ohm load - farfetched 11:37:35 03/09/25 (1)
Gosh it genuinely never occurred to me to try asking the Depth to do that.
Best I can do is 70hz high pass. That doesn't help. The celestion 5's at anything approaching row H (I like row K) is impossible. Back a bit in first balcony? Most stuff, yes, lovely.
Anything more, both speakers, putting test tonism aside, basic piano sonata stuff. Big left hand chord = audible (foam earplug, ear next to driver) cone breakup, a kind of fuzziness or dry-wool sound clearly marking the fact, oops, cannot do this, driver will not transmit. These are modest boxes and were designed modest. High praise if volume <9:00. 9:00, depends.
So my thinking is, realistically, what does that high pass need to be? I do not think 100 would cut it, not significantly. I think to get to Row H these boxes need 200hz. And that is me basically roleplaying a seller ;)
I will see. A high pass is a high pass. They are specced at 70hz [edit: 75hz} but any cut might be much improvement? Hmm. Thanks. I'll report back as the seson (baseball) progresses.

/ optimally proportioned triangles are our friends
- https://www.martinlogan.com/uploads/documents/manuals/manual (Open in New Window)
Edits: 03/09/25
- At the highest low pass (75hz) .. - farfetched 15:33:32 03/09/25 (0)
  The sound stage and note distinction on Tchaikovsky Orchestral Suite #3 3rd movement (scherzo) went to sludge with the Depth sub turned to its highest low pass setting, 75db. This made it the worst setting. Subs, I never have used them even at 75hz,
  
  So much for that notion.
  
  The final answer for me might be about finished.
  
  At its volume range of polite and a "book reading" speaker it's nothing but pleasant. I haven't said anything about soundstage or "tonal balance" or clarity or the Celestion tweeter, because those pass muster enough until way after that cone is not combat effective.
  
  The LRS's will be back in the listening room after I enjoy the new tv room system for a while.
  
  I am just so skeptical any 2-way monitor can overcome these problems and/or limits. Just mitigate and minimize them and get the colorations just right.
  / optimally proportioned triangles are our friends

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