What's to chat about?

[Seth]

So, according to my highly scientific $10 bathroom scale the 16" T39 built with CDX Douglas Fir and loaded with a Basslite S2012 is 55lb... should be 51ish empty cab and pushing 60 loaded with a 3012LF.

[Bryan Cox]

So, according to my highly scientific $10 bathroom scale the 16" T39 built with CDX Douglas Fir and loaded with a Basslite S2012 is 55lb... should be 51ish empty cab and pushing 60 loaded with a 3012LF.

Sounds about right. Mine were built from ACX, 20" wide, 3012LF, and came in at 63 lbs apiece.

[Seth]

So, according to my highly scientific $10 bathroom scale the 16" T39 built with CDX Douglas Fir and loaded with a Basslite S2012 is 55lb... should be 51ish empty cab and pushing 60 loaded with a 3012LF.

Sounds about right. Mine were built from ACX, 20" wide, 3012LF, and came in at 63 lbs apiece.

I'll be curious how the 30"ers compare in weight and overall sound quality/output. They're up next, I think.

[Seth]

...Show me yours if you can...

Mr. Owl, I don't have any closets to share with you. However, perhaps a little more gear porn will suffice.

Here's what I have stuffed in one 4RU roller; 32 channel mixer, 32 input/16 output stage box, wireless mic receiver which I use for my talk-back mic (I can talk to the whole band or individual musicians in full duplex audio(like a telephone), pretty much any time when they're on IEM's), 3 IEM transmitters with room for one more (I use one for myself, the others are for the band, they are all mixed in stereo to help produce a spacial sound, less in the head), the 2RU Klark Teknik module under the IEM transmitters is a digital output box which get's a CAT5 input from the mixer and outputs 8 channels of balanced audio which I have wired to the IEM's. I've found a power converter that will allow me to just have one "wall wart" to power all the smaller transmitter/receiver units. That will be nice to eliminate the weight, bulk, and untidy birds nest of power wires. There's still room for 2 more IEM transmitters, waiting for the need or good enough deal.

At some point, I'd like to have a separate IEM rack, probably a soft sided rack bag. That way I can put the stageI/O box where it will be the handiest and put the IEM transmitters where they will work best (as far as transimssion/reception quality) and just run a CAT5 to it's location from the stage box. And, if no one is on IEM's I don't have to tote it to the gig.


Anyway... Enjoy

[Grey Owl]

Hiya Seth
That's very economical packing I must say. Very efficient packaging.
Cheers

[NukePooch]

So, according to my highly scientific $10 bathroom scale the 16" T39 built with CDX Douglas Fir and loaded with a Basslite S2012 is 55lb... should be 51ish empty cab and pushing 60 loaded with a 3012LF.

Sounds about right. Mine were built from ACX, 20" wide, 3012LF, and came in at 63 lbs apiece.

I'll be curious how the 30"ers compare in weight and overall sound quality/output. They're up next, I think.

It's a bit outside what you were asking for, but one of my 32" T48 (3015, Arauco) came in at 107-ish lbs on the bathroom scale.
Jack112L is right at 30lbs.

[Seth]

Sounds about right. Mine were built from ACX, 20" wide, 3012LF, and came in at 63 lbs apiece.

I'll be curious how the 30"ers compare in weight and overall sound quality/output. They're up next, I think.

It's a bit outside what you were asking for, but one of my 32" T48 (3015, Arauco) came in at 107-ish lbs on the bathroom scale.
Jack112L is right at 30lbs.

It is, but I see some other similarities in your cabs I'm curious about. What's your feeling on the performance difference between your 15" and 32" cabs? Big difference?

[Seth]

Hiya Seth
That's very economical packing I must say. Very efficient packaging.
Cheers

I forgot to mention that I'll be putting a mini PC in there too, with the main purpose being multi track recording of performances. I used to have an expansion card in my mixer that recorded all tracks on an SD card, but I replaced that expansion card with the Dante Audio Networking Card. It should be easy enough to just run the Dante Network to the PC and record it into a DAW (I use Reaper, but any would do fine... ProTools or whatever). I run all my gigs from laptop or tablet (even used my phone once for a solo act) and can just use the remote desktop app to operate the mini PC without it having to have it's own dedicated monitor, keyboard, and mouse. Pretty cool if you ask me.

All of the connectivity that case needs is mics/instruments in the front, power, and 1-3 CAT5e's out of the rear. That's it. Super simple set-up.

[NukePooch]

It is, but I see some other similarities in your cabs I'm curious about. What's your feeling on the performance difference between your 15" and 32" cabs? Big difference?

Honestly, tough for me to say. I had the two slims for a while before I built the 4 32"s. The slims were okay, if I remember correctly. Once I built the 32"s, I honestly haven't even hooked up the slims. They've just been in the way in the garage...Truth be told, I'd probably sell them if I could get the energy to dig them out and take pics of em, LOL.

[Seth]

Just ran some impedance sweeps on the Titan and pair of SLAP's paralleled. Does everything look as it should? Is the 2 ohm dip at 5K on the SLAP's all good? Just as a side note; I used a 4.3Ohm resistor in place of the 4 ohm called for in the plans.

Two 2x6 SLA Pro's wired parallel (internally wired in series per the plans)

16" Titan 39 loaded with a Basslite S2012 20-20,000 sweep

[Seth]

The SLA's separately tested show slight variances, but are essentially nearly identical to each other.

Top

Bottom

Both together

[Seth]

I just put the 3012LF back in. Here's the impedance sweep compared to the S2012. Interesting results, but I have little idea what to make of it.

16" wide T39 3012LF

16" wide T39 S2012

[Bruce Weldy]

Interesting results, but I have little idea what to make of it.

I don't really understand what use an impedance chart would be to the end user. I'd be more interested in the frequency response.

Maybe one of the more savvy folks could explain the importance of the impedance chart to the user as opposed to a designer?

[Seth]

So, I put the 3012LF back in the T39, hooked up the 60v capable amp, one channel to the T39 one to the pair of SLA Pro 2x6 shorties, and set the limiter for the sub (aimed for 55-56, but could only get 54 or 57 and put it at 54v). The SLA Pro's are loving the extra power the larger amplifier is capable of. Since they're balanced with the T39, they're attenuated about 10dB below the sub and they stay clean all the way up to and beyond the point the sub is into it's limiter, deeply ticking the -6 indicator. It's waaaay more output than my dad will use rehearsing in his office or family room. It's probably more output than a back yard party band playing reasonable volumes would need. The whole system just cranks out great sound at fantastic volumes. The other amp (200wpc/40v) and Basslite S2012 are plenty. But, I think I'll leave the 3012LF in and give Dad the package in kick ass mode.

[Seth]

Interesting results, but I have little idea what to make of it.

I don't really understand what use an impedance chart would be to the end user. I'd be more interested in the frequency response.

Maybe one of the more savvy folks could explain the importance of the impedance chart to the user as opposed to a designer?

I agree. The function is built into the amplifier and is supposed to (I guess) indicate blown speakers or something. Otherwise, I think the peaks are indicators of the resonant frequencies and can be compared against intended design performance goals. I am a little curious about the 2ohm 5k dip and if it's within expectations though.