Herbert with ISP Steve Lukather Subwoofer System

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lightningbolt1

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Hey guys, I have had my Diezel Herbert for 10 months now, Love it Love it Love it, This amp outshines all my others and I own many great amps ( Soldano, Metaltronix, Uberschall, MarkIIB Mesa).

About 2 months ago, I bought a ISP VECTOR SL Powered Subwoofer system(Steve Lukather model). This is how it connects to the Diezel (Speaker Jack out of the Diezel, into the Vector SL Input jack, the the speaker out jack of the Vector sub, into my 412 cabinet). The Vector gets its signal level from the output voltage of the Diezel Herberts speaker jack. The problem I am getting is not enough sub level, and way too much level in my 412 cabinet, I had sent a email to Peter, but had no response. The Diezel works fine so I know its no trouble on that end, my question is this? Does anyone here own a ISP sub, or played thru one? Buck from ISP states there is no way I have this 600watt RMS sub maxxed out, yet it is on 10 level wise, and not near enough bass. I want this setup to work, and Buck is trying to help, he has been great in trying to get this problem takin care of, just wondering if anyone here may have some tips or advice, Thanks in advance,

Larry Gunn
 

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Dear Larry !

My email didn´t arrive ?

We have the same level and impedance on the speaker
output as every other company. Did You try the 4 and
the 16 ohm output as well ?

Have You tried the send jack ?

Peter
 
Peter, Yes I did try the 16 ohm jack when using my Bogner Classic lead 80s 412, and I tried the 8 ohm jack when using my Mesa 412 with Xpattern wired V30s & 75s. I was told by Buck with ISP that his sub gets its input levels from the output voltage from the speaker jack out of Herbert. Buck is at Summer Namm and I believe he was going to try to catch Uwe at the booth. I cant really send a compensated out to the sub, as that signal is line level/not powered, unless we mod my sub. The Herbert amp has some of the nicest thick distortion I've ever heard, I'm just trying to mate it up with the type of attack that the newer de tuned bands use, then turn them both up, and hurt em all, make sure they feel it as well as hear it :) :lol: :LOL:
 
When you daisy chain them like that, which output on the head are you using? In a daisy chain, cabs have two jacks wired together, which in that case the signal will find its way to the path of least resistance and mostly over look one of the sources all together, so the signal may not make it to the power amp of the sub entirley or have a weaker signal rather than the cab that the signal wants to flow to. If you haven't already set both cabs to the same impedance/jack and if they're both 8 ohms use the 4 ohm output of the head, both 16 use the 8 ohm output. Also instead of daisy chaining them do it the normal way and use the 4 ohm jacks to each 8 ohm cab, 8 ohm jacks to each 16 ohm cab. If its not fine then, then something is up with the power amp in the sub.

-Nick
 
Nick, I'm only daisy chaining out of the herbert into the sub, into a speaker cabinet. 1 speaker cabinet, Was you thinking I was using both my 16 ohm and 8ohm cabs both with the sub? Thats not what I was doing. But I still wonder what could keep the sub from not getting a full level to amplify, The signal runs into the sub from Herbert, is at that point crossed over, low signals go to the powered sub, and mids and highs go to the speaker 412 cab. Now what I have noticed so far when it is crossed over and split then sent to cab is a less gain distortion tone that is super clear when the lows are removed. What I mean by less gain is if my gain knob was at 12 oclock position before using the sub, the gain knob may now need to go to the 1 or 2 oclock position to achieve the same amount of gain as it had before being crossed over, but I'm telling you, the clarity seems very very impressive.... I just need more bass to the sub to even things out. I was also using heavy 12 gauge speaker cables, even trying lighter speaker cables, but no dir=fference in output. Buck from ISP is going to be driving back from Summer Namm, and he is going to personally drop by, and check out my situation, how cool is that.... Between Peters at Diezel and Buck from ISP I cant ever imagine any better customer service in the music business, Thanks to you too Nick,

Larry Gunn
 
Hmm, now I dunna, haha. I had no idea the thing actually divided the frequencies though, didn't really look into it that much, I thought it just amplified what came in, in order to push the driver harder, might want to try adding more deep and or lows from your Herbert then, have you tried that? Maybe it needs a stronger signal from the sub frequencies itself? Sorry if you've tried that, just going with what's easiest.

-Nick
 
KGP 1, The Diezel Herbert amp has more punishing bass/ bottom, fairly tight and focused,with a extra thanks to the deep knob, but I decided to try out the Vector SL, when I hook it up to my Diezel, it sounds incredible as far as fullness, at low volumes,r eally filling up the spectrum, not only with extra low end freqs, but also by taking the bass freqs out of my Bogner 412's, or my Mesa Rectifier Cab X wired, the speaker cabinets now have much more clarirty. I have been chatting with Buck from Isp back and forth, and he 1st modded my SL to have more volume output than a stock SL, and modded mine with a XLR "OUT" jack, for feeding my low end thump, to a PA, I have not tried out that feature. Now the 2nd amp he built for me, had a bit more power, but once again, if I turned up Herbert to band volumes, or gig volume, the 412 cabs would get blazing loud, but the bottom didnt rise evenly, my top cab would be smoking loud, well I need to be able to play loud, and have that bottom end devastate like the top. So I kept trying different settings on Herbert- like open master volume, and keep channel volume low, then turn up channel volume, then vice vers- open up channel volumes, and barely turn up masters, even tried a 50/50 volumes between channel 2's channel volume and masters 1 and 2.

One wierd thing I didnt think of really till now... was this, all of my testing with my Vector SL and Herbert, was in Channel 2 of Herbert only. I didnt use channel 3 at all testing the sub. Channel 3 does not have any more bottom than 2 does it guys? I primarily use ch2 in the + position. So anyway, I had to try to explain over the phone to Buck at ISP what my deAL was with this, He personally came by to meet me/ visit, and see the rig in action for himself. He is now building me another amp interface, more power to suit my situation. How cool is this guys. The owner of the company, personally visits me to see 1st hand what my problem is, and then he can see/ understand what to do to make my Herbert/ SL rig, one of the most crushing and deep Herberts in action (I hope so). I will keep you all posted, when I get this going. I want to make some YOUTUBE vids to show Diezel Herbert in action, then with sub, so people could hear Vector SL and what it does/ adds.
 
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