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Old 11-07-2015, 01:33 PM
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Default RE mt 15 info req. PSI or others

This section seems kinda dead, hopefully someone from PSI can help. Anyone with info about the RE mt 15 feel free to jump in.

I recently picked up two RE mt D2 15's reconed by PSI a few years ago. Supposedly he bought them directly from PSI on caco.

The subs have double leads, relatively soft suspension (assumed daily use), carbon fiber dustcaps, and a flatwound (aluminum i think) coil.

One has a chipped magnet that was glued by you guys i assume if that helps identify these subs.

Anyways, the point in me making this thread is to figure out what these soft parts do to this sub, and its excursion, thermal, and mechanical capabilities. Is it a 3 inch coil, or 4 inch? seems like the dust cap gets hot pretty quick. I've heard these subs handle 2-3k rms with ease (with 4 inch coils), so I want to know if maybe i got a 3 inch coil version?

do carbon fiber dustcaps get hotter than regular? let me put it this way, the dustcap gets way hotter on the same power my soundqubed hds315 was on.

what kind of box do they like? I know they're made for spl, but ive also heard they kill lows. seems likethe sub maxes out quick on low notes though (maybe im being a wuss). currently have a 5 cube box @ 35hz with an 8 inch octo and it's killing it but maybe its not ideal?

thanks in advance

Last edited by mitchell0715; 11-07-2015 at 01:37 PM.
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Old 11-07-2015, 01:41 PM
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Quote:
Originally Posted by mitchell0715 View Post
This section seems kinda dead, hopefully someone from PSI can help. Anyone with info about the RE mt 15 feel free to jump in.



I recently picked up two RE mt 15's reconed by PSI a few years ago. Supposedly he bought them directly from PSI on caco.



The subs have double leads, relatively soft suspension (assumed daily use), carbon fiber dustcaps, and a flatwound (aluminum i think) coil.



One has a chipped magnet that was glued by you guys i assume if that helps identify these subs.



Anyways, the point in me making this thread is to figure out what these soft parts do to this sub, and its excursion, thermal, and mechanical capabilities. Is it a 3 inch coil, or 4 inch? seems like the dust cap gets hot pretty quick. I've heard these subs handle 2-3k rms with ease (with 4 inch coils), so I want to know if maybe i got a 3 inch coil version?



do carbon fiber dustcaps get hotter than regular? let me put it this way, the dustcap gets way hotter on the same power my soundqubed hds315 was on.



what kind of box do they like? I know they're made for spl, but ive also heard they kill lows. seems likethe sub maxes out quick on low notes though (maybe im being a wuss). currently have a 5 cube box @ 35hz with an 8 inch octo and it's killing it but maybe its not ideal?



thanks in advance

All Re Audio MT are 3" vc and yes they are rated at 2500. Feeding them 3k clean shouldn't be a issue. Any pix??


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Old 11-07-2015, 01:51 PM
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Originally Posted by Silver-N-black View Post
All Re Audio MT are 3" vc and yes they are rated at 2500. Feeding them 3k clean shouldn't be a issue. Any pix??


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I'll upload some pics here shortly, I'm going to the local crescendo show so it might be tonight.

Dunno where I hear that they were 4 inch coils lol maybe they're 8 layer?

My taramps hd3000 seems to push them to their limit and I usually only clamp 1500-2000w out of it. Long bass lines on a very soft clip gets them warm quick.
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Old 11-07-2015, 09:10 PM
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I know my MT 15d2 has stock parts and takes a good amount of power
5cf sounds huge I think mine was 3.5cf
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Old 11-07-2015, 09:36 PM
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Originally Posted by tymoto21 View Post
I know my MT 15d2 has stock parts and takes a good amount of power
5cf sounds huge I think mine was 3.5cf
that's probably why. i really want to hear from the guys who made this sub more than anything, they'll know exactly what it can do lol these are known to be "spl" oriented but with the PSI soft parts that could of changed.

5 cubes is definitely huge but im pretty sure thats why its so damn loud also so it might be a good thing
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Old 11-11-2015, 10:08 PM
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If you only have a real 1500-2000 Watts RMS, I would recommend checking to see how clean that power might be.I would venture to guess that your amplifier is sending a clipped output, causing excess heat build up in the voice coils.

The MT has a solid pole vent and actually cools the coil very well. any heat that you are feeling the dustcap is being absorbed from the voice coil itself. If the richest the dustcap, it's heat that you are pouring into the voice coil via your amplifier. Either you have entirely too much power for the subwoofers to handle (not likely) or that power must be clipped.

What do you have for an electrical system? Wiring? Head unit?

Your subwoofers are capable of a lot of low end output. I would again venture to take a wild guess that your amplifier might be the weak link in this scenario.

Do you have any friends that might be able to let you borrow a stronger amplifier? Do you have an oscilloscope or other distortion meter that you can use?
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Old 12-18-2015, 08:22 PM
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Originally Posted by TeamPSI View Post
If you only have a real 1500-2000 Watts RMS, I would recommend checking to see how clean that power might be.I would venture to guess that your amplifier is sending a clipped output, causing excess heat build up in the voice coils.

The MT has a solid pole vent and actually cools the coil very well. any heat that you are feeling the dustcap is being absorbed from the voice coil itself. If the richest the dustcap, it's heat that you are pouring into the voice coil via your amplifier. Either you have entirely too much power for the subwoofers to handle (not likely) or that power must be clipped.

What do you have for an electrical system? Wiring? Head unit?

Your subwoofers are capable of a lot of low end output. I would again venture to take a wild guess that your amplifier might be the weak link in this scenario.

Do you have any friends that might be able to let you borrow a stronger amplifier? Do you have an oscilloscope or other distortion meter that you can use?
Wow, I'm not sure how I missed this up to this point, but I appreciate your in depth reply regarding these subs. I'll post a plethora of pictures at the end of this post if it helps identify them.

Regarding the power I'm sending to the sub, the amp is a Taramps HD3000, with clean clamped output right around 2kw rising between 1.5 and 2 ohms. The glue smell has actually seemed to dissipate over time, which I would assume is attributable to excess glue burning off. The power is clean, the amp has a clip light, and I have plenty of electrical to back it with two 55ah batteries under the hood and dual alternators, voltage never drops below 13.5. I used an oscope to set the gain with a -6db tone, I left an extra 2 positions on the subw level output of my headunit for increasing the gain overlap for songs with bass recorded lower, mostly rock. I have soft clipped the sub for short periods, and only smelled coil a couple times, hasn't given me any smell for weeks since.

The driver is in a 5 cube net enclosure tuned to 35hz with an 8x18 inch octoport and seems to lose significant output below 25hz, whether or not this is a natural roll-off for this driver in this enclosure is up in the air for me, it could be possible that I'm expecting too much. Besides that, these subs are nearly perfect, just plain loud and really great sounding considering their original design was for spl.

But back on topic, I'm mostly interested in knowing what this sub has been built with, and what type of enclosure it would enjoy most? It feels like it has daily spiders, they're relatively soft, so would this driver prefer a lower tuning or smaller box?









Last edited by mitchell0715; 12-18-2015 at 08:35 PM.
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Old 12-18-2015, 08:43 PM
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If your looking for solid output below 25hz try tuning lower than 35hz like 28hz.
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Old 12-18-2015, 08:51 PM
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If your looking for solid output below 25hz try tuning lower than 35hz like 28hz.
it's not like I really want output down there, id rather get more output around a usable frequency, say 30-60hz, than 20-50hz. just dont know if i was expecting too much out of this driver at that low of a frequency because it seems to be hitting xmax pretty quickly
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Old 12-21-2015, 09:04 AM
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Playing below the tuning frequency of the box is like playing the subwoofer in a box with a big hole in he side of it. The port has no effect on the sub, and doesnt help to control it, when playing about >3hz under tuning. No subwoofers will deliver high output below the tuning.

Set your subsonic filter at 30 to take care of over excursion below tuning.

Do these subs have dates written on the back of the cones?

they look like they were built with 8 layer coils, 4 original style stiff spiders (less stiff than what we use now), dual leadwires and CF caps. I would rate these subs at up to 2000w rms for daily use.
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