Pimped my Quest’s

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Hassebasse75

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Just some pictures of my Quest speakers, during the makeover I have put them through. They started as a bad buy, with one dead panel. Was on my way to sell them with a loss. But contacted the ML distributor here in Norway, and around christmas 2015, I got them brand new panels. I use an electronic crossover, and all passive parts in the speakers crossover are bypassed. I run the panels with Audio Research VS115, with PSvane kt88t2 tubes. And the bass is run by Electrocomaniet AW400 monoblocks.

I have no given the speakers new paint, new bass, and feets/spikes. The new bass is from the carstereo production to Focal, E30kx. So I am verry nervous and exited for how they will play now. But the seller made simmulations to my speakers volum to play in. And I have taken a shot in the dark going for these elements. I have my tube amp on service at the time, so have not been able to play them after this upgrade.
 

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Hassebasse75

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I have allso removed the cover/grill infront of the bass. I mounted two strips of mdf on each side, to hold the stators in place. Think it looks good!
 

Robert D

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Great job! They look very good. Those woofers are probably going to be better than the original.
 

Hassebasse75

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Great job! They look very good. Those woofers are probably going to be better than the original.
I really hope so. I have used the original split at 150 hz so far, with the old bass. But I have an 170 Hz possibility also, on my electronic crossover. I maybe will try that, when everything is run in again. In the end I hope for a bit more smack in the upper bass.
 

Hassebasse75

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Higher is better, trust me. I run the even larger Monolith panels with a 315Hz crossover.

Nice job on the restoration!
Thanks!

I will have that about even higher crossover on my mind. Thanks for the tip. 😊
 

JonFo

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What is the original crossover on the Monolith’s?
A way-to-low 120Hz. Panel resonated like crazy, as they used a shallow 12dB passive XO, and panel was trying to produce significant output at 60Hz. Even the new Neolith (same panel dimensions ) lists the crossover as 250-400 (confusingly vague, with no explanation).
Anyway, my tests showed that below 300Hz the panel was being stressed at higher volumes. So I use 315Hz and a 24dB/Octave (fourth-order) LR in the active XO.
My goal was to achieve 105dB SPL / 1M with <1% THD across the spectrum. That is a high bar.
 

Hassebasse75

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A way-to-low 120Hz. Panel resonated like crazy, as they used a shallow 12dB passive XO, and panel was trying to produce significant output at 60Hz. Even the new Neolith (same panel dimensions ) lists the crossover as 250-400 (confusingly vague, with no explanation).
Anyway, my tests showed that below 300Hz the panel was being stressed at higher volumes. So I use 315Hz and a 24dB/Octave (fourth-order) LR in the active XO.
My goal was to achieve 105dB SPL / 1M with <1% THD across the spectrum. That is a high bar.
My crossover is a build over linkwitz riley 24 db-oktave. But only have the options 130/150/170 Hz. Specail build from what the picture shows. I guess going from 150 to 170 doesn’t do much then. So I should probably over time aim for an new crossover then? 👍
 

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JonFo

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So I should probably over time aim for an new crossover then?
That screenshot shows a model with much lower crossover points than you mention. It seems like a XO for a sub, not an intra-speaker XO.
If your model supports 170, then try that for a while.
But a t some point, trying an XO at a higher point might be worth doing if you can also adjust delay. So that implies a DSP-based unit.
The panel to woofer impulse alignment required can also be set, IIRC a 1.6ms delay to panel relative to woofer on the Monolith, the Quest will be different.
 

Hassebasse75

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That screenshot shows a model with much lower crossover points than you mention. It seems like a XO for a sub, not an intra-speaker XO.
If your model supports 170, then try that for a while.
But a t some point, trying an XO at a higher point might be worth doing if you can also adjust delay. So that implies a DSP-based unit.
The panel to woofer impulse alignment required can also be set, IIRC a 1.6ms delay to panel relative to woofer on the Monolith, the Quest will be different.
My model have been modified by builder/producer. The tecnical sheet shows the original specs. Thanks for the tip about the crossover.
 
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