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Avatar 3 way 15/6/tweet part 2

#81
AwkwardLoudness said:
Cab design and port size could certainly be a factor. I know from much experience that the Hiwatt 400 farts out cabs much easier than other tubes amps I've had especially with the 'bass' EQ knob dialed clockwise. The output transformer has a frequency response range of 3.6 hz - 112 khz. MHuss Hiwatt Amplifier Pages - Tech Info
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If your amp is putting 3.6hz-30hz into your cab, I'd consider that a design flaw. I'd also consider picking up one of those nice high pass filters that are floating around these days to keep such signal from your speakers.
 
#83
This is the first time I've heard of the 3015LF farting out. That must of been L.O.U.D. I once had my LDS 15/6 cranked up with 1000w at 8 ohms in a large club and that was almost painfully loud, yet the woofer didnt complain at all. If I were a betting man I'd agree with GB's assessment on port size being the issue.
 
#84
greenboy said:
To others: And yet others have liked various tube heads through fEARfuls and nearfuls. So why would subjectives about THAT have much to do with this mention of farting?
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One man's farting is another man's mushy - which is what cranked tubes through a 3015LF sound like to me (Mushy). I wasn't mentioning it as a certainty, just that it's possible he's hearing what I heard that caused me to flip the 400+.

The words we use to discuss stuff are so subjective it's hard to know what someone is describing sometimes.
 
#85
::::BASSIST:::: said:
This is the first time I've heard of the 3015LF farting out. That must of been L.O.U.D. I once had my LDS 15/6 cranked up with 1000w at 8 ohms in a large club and that was almost painfully loud, yet the woofer didnt complain at all. If I were a betting man I'd agree with GB's assessment on port size being the issue.
Click to expand...

This is also possible. Calculating tuning frequency on a cabinet seems to be a fidgetier process than it's often made out to be, and seems like it can require measurement to get exactly right.

I'd be curious to see a measurement of that box.
 
#86
greenboy said:
To others: And yet others have liked various tube heads through fEARfuls and nearfuls. So why would subjectives about THAT have much to do with this mention of farting?
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I should have structured that quote a little better. My comment had nothing to do with the "farting" out cabs post. It was more just in agreement with rpsands about his experience with tube heads and his cabinet.
I don't care for my SVT through the TB153. Maybe it would be a different case with a "true" fEarful, but the TB153 does not communicate the music in that head like my NV610 does.
Purely personal preference.
I love how my other heads sound through the TB153. One of which is a Streamliner. Go figure.
 
#87
FWIW I hammered my 153 pretty hard with nary a sign of farting or chuffing. (I'm still assuming it had a fauyty xover, but am still awaiting their diagnosis and that's another story).
 
#88
greenboy said:
I'm not denying that the sweet monster can fart a lot of cabs out, man ; } -- it's partly why I have an aversion to so many commercial cab designs.
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I may need to build one of your fEarful design cabs for comparison. I have the tools but not much time. In the meantime, I'll try a compressor or EQ pedal to tame the lowest frequencies. All of the lows move through that transformer with the amp's bass EQ knob turned up.
 
#89
lomo said:
FWIW I hammered my 153 pretty hard with nary a sign of farting or chuffing. (I'm still assuming it had a fauyty xover, but am still awaiting their diagnosis and that's another story).
Click to expand...

It kind of amazes me that I've been reading similiar comments about this cab, and then, someone with a tube amp comes along with TWO of these cabs and gets them to fart out ! Thre's gotta be something else going on there. :eyebrow:
 
#90
jnewmark said:
It kind of amazes me that I've been reading similiar comments about this cab, and then, someone with a tube amp comes along with TWO of these cabs and gets them to fart out ! Thre's gotta be something else going on there. :eyebrow:
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It's the crazy lows and dynamics of my amp's transformer I think. It only farts out with the bass knob turned up and a whole lotta volume. That amp can fart out the speakers in every 8x10 cab I've tried to use.
 
#92
You can make a 3015LF fart out with a 300 watt solid state amp if you add 10db of bass. I know this because I've done it with an MB500 (and can do the same with my Shuttle 9.0).

Many tube heads are just insanely bassily voiced.
 
#93
I wish I could find a pair of vintage Hiwatt 4x15 cabs with original speakers, which was the recommended pairing with that amp per the old Hiwatt catalogs. I've never seen one for sale with all four original Fane 15" speakers. I'd need a larger vehicle. With regular 6 string guitar, these Hiwatts always sound best with the original Fane speakers, so I figure the same is true for bass.

greenboy said:
810 cabs are easier to fart out than you think. A single stock 8-ohm 3015LF boxed and tuned right has nearly has as much displacement as most - if not all - 810 cabs out there.
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Oh trust me, I am aware of this ;).
 
#94
have you looked at YOUR cab's tuning, rpsands?

Frankly, I've done resonant envelope synth stuff with my V-Bass that's easily got twice as much fundamental content as electric bass, and added 7 or 8 dB or low EQ to that and then layered it with bass-boosted signal. I'm aware of what massive LF content can do. Still, this isn't adding up entirely. I've had tube amps on the 3015LF early on too. And I know the Fender tone stack's proclivities, as well as some others.

But then, I have 4th order BW highpass at 35 Hz. That's a good sanity check.
 
#95
greenboy said:
have you looked at YOUR cab's tuning, rpsands?

Frankly, I've done resonant envelope synth stuff with my V-Bass that's easily got twice as much fundamental content as electric bass, and added 7 or 8 dB or low EQ to that and then layered it with bass-boosted signal. I'm aware of what massive LF content can do. Still, this isn't adding up entirely. I've had tube amps on the 3015LF early on too. And I know the Fender tone stack's proclivities, as well as some others.

But then, I have 4th order BW highpass at 35 Hz. That's a good sanity check.
Click to expand...

Based on some screwing around with sine waves and testing air flow I am pretty sure mine is tuned to 47hz or so. I'm not sure what results drove me to that, but I think I was playing with figuring out where the center of the saddle was (e.g. where the maximum air flow was with a sine wave generator).

With 10db of bass boost I can cause some audible distortion with the volume dimed on an MB500, although not at all points obviously. Note: For some reason sine waves are a lot more forgiving as far as causing "farting" than electric bass...my Jack 112 can take a brutalizing with recorded music or sine waves, but bass can make it distort with a 200 watt amp.

I was not using a high pass at all though, to be fair.
 
#97
My cab is on the way back from Avatar. They found no smoking gun, but a rattle in one of the handles, which they changed, and some chuffing through a screw hole, which they sealed. I hope this is it. Shipping was pricey, although they're covering the return trip.
 

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