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Author Topic: OTS and Alesis Quadraverb  (Read 12006 times)
JEDMON01
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« on: November 24, 2008, 03:12:08 PM »
As we know the OTS FX loop is super hot and overloads most simple fx pedals, especially delays. The KLEIN-ULATOR addresses this problem admirably but it's quiet a large piece of kit to be balanced on the top of the amp head at gigs.

I though I would try a very old Alesis Quadraverb in the loop and was very pleasantly suprised. Check out the YouTube clips.

Won't know till tomorow when I play a gig with my band if it has sucked my tone in any way. I don't like my signal path being digitised  Sad

Clean tones



Overdriven tones




Due to the brick wall compressor on the camera the delay effect is much more pronounced on the video than in real life.

John
« Last Edit: November 24, 2008, 05:22:41 PM by JEDMON01 » Logged
Pickmaster
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« Reply #1 on: November 24, 2008, 05:05:09 PM »
John,

That was very sweet tone and lovely playing.
Quadraverb worked just great.

Cheers
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JEDMON01
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« Reply #2 on: November 24, 2008, 05:32:37 PM »
yeh, I'm really loving the Ceriatone OTS.
And it's all thanks to you  Grin .
Hope we bump into each other some time at the Moon.

Regards
John
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hywelg
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« Reply #3 on: November 24, 2008, 10:33:21 PM »
Hi John, nice to see you in here, (we met at Matt's Bath week)

I got a G sharp to go in my loop and found that it sucked both tone and volume (to be expected really since the impedance is not right) so I'm in the process of building a Kleinulator into a rack chassis with footswitcheable bypass. I'll post the layout when its done, I'm just waiting for the rack chassis coming from RS.

Best regards

Hywel Harris
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JEDMON01
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« Reply #4 on: November 25, 2008, 03:52:30 PM »
Hi Hywel,
I am using a KLEIN-ULATOR and a Mad Professor Deep Blue Delay. Excellent results but a lot of kit to set up at a gig, and it all looks a bit precarious balanced on top of the amp head. Look forward to seeing your solution.
I will try the Quadraverb tonight to see if it sucks my tone when playing with a live band. Probably will, being digital  Angry
John Edmonds
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JEDMON01
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« Reply #5 on: November 29, 2008, 06:27:54 PM »
As expected the OTS / Quadraverb combination sucks tone in a loud live band situation. I only lasted 3 songs before I disconnected it.
That's the problem with digitising pure tone  Undecided
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hywelg
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« Reply #6 on: November 29, 2008, 09:42:36 PM »
Quote from: JEDMON01 on November 29, 2008, 06:27:54 PM
As expected the OTS / Quadraverb combination sucks tone in a loud live band situation. I only lasted 3 songs before I disconnected it.
That's the problem with digitising pure tone  Undecided

Was that using the Kleinulator to run the Quadraverb John? or just on its own in the loop.
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JEDMON01
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« Reply #7 on: November 30, 2008, 11:00:58 AM »
Hi Hywel,

That was using the Quadraverb on it's own. I was trying to avoid the use of the KLEIN-ULATOR as it is so bulky.

I saw Paul Garner last week, ( best guitarist I have seen since Matt ), and he was using a TC Electronics Nova Reverb through an old s/f 50 Watt bassman.
His tone was incredible. I checked the TC and it will take an input signal of +16dBu which I am sure will accomodate the OTS FX loop.

I have ordered one, should be here tomorrow. Will let you know.

Regards
John
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hywelg
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« Reply #8 on: November 30, 2008, 01:07:25 PM »
Good luck with the Nova, though I think the issue, rather than one of input level,  is more likely to be the impedance mismatch. I'm not technically minded enough to understand the issues but I believe what the Klein does is remove impedance as an issue for anything in its' loop.

I've got the TC G# and I'm really hoping it will do the business when in the Klein loop.
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exocet
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« Reply #9 on: November 30, 2008, 03:45:13 PM »
You are correct in that the FX loop in the OTS is unbuffered valve which presents 2 issues, high signal voltage levels and high impedance.

It is a simple process to reduce the voltage level (a variable resistor or 'pot' will do this) however impedance matching is more complicated and involves the use of either a transformer or active circuitry (valves. transistors, op-amps etc).

If you feed a high impedance source (OTS FX Loop send) into a low impedance input (many FX units especially rack mount types which are most often designed for use in studio desk type send and returns) you will tend to lose both signal level and high frequencies.

FET's are often used in active buffer circuits due to their high input impedance characteristics - they are voltage devices like valves unlike standard bi-polar transistors which are current devices.
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JEDMON01
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« Reply #10 on: November 30, 2008, 06:30:42 PM »
That's interesting. The Nova's input impedance is 1Meg so it should be OK , Yes ?
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exocet
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« Reply #11 on: November 30, 2008, 10:47:23 PM »
1 Meg is certainly in the right area. A lot of rack mount type effects with Line input / output are in the region of a few k ohms.

I'm not sure what input / output impedances the Kleinulator presents as I've never looked at one.
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Pickmaster
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« Reply #12 on: December 05, 2008, 04:00:04 PM »
Quote from: JEDMON01 on November 30, 2008, 11:00:58 AM
I saw Paul Garner last week, ( best guitarist I have seen since Matt ), and he was using a TC Electronics Nova Reverb through an old s/f 50 Watt bassman.

Hmm? Best guitarists?
No disrespect for Matt and Paul but I thought you’ve seen Guthrie Govan, Dave Kilminster or Pete Wood, nothing to say about Robben Ford, Allan Holdsworth, John McLaughlin etc.
« Last Edit: December 05, 2008, 05:09:18 PM by Pickmaster » Logged
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JEDMON01
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« Reply #13 on: December 05, 2008, 09:49:44 PM »
I didn't mean it literally   Shocked
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hywelg
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« Reply #14 on: December 05, 2008, 10:30:25 PM »
Besides all the 'best' guitarists are dead.
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