Davi

Designed by Sekou Bunch in 2009 and released in 2010 and ran until around 2014 when Carvin rebranded to Kiesel for their high end guitars. Stunning looks with amazing playability and stability, as you would expect from Carvin. One of the nicest basses ive ever played and you'd be hard pushed today to find a nicer bass under £1500.
Swamp ash body, Maple neck and Birdseye Maple fretboard, Carvin Alinoco pickups with Active/Passive switch, 18v preamp, stacked bass/treble knobs, 34" scale, 38mm nut width, Carvin premium tuners and bridge.
In excellent condition, the body neck and frets are immaculate. comes with a high quality Carvin hard case with original case candy included. No offers please.

Collection prefered but will post it out.

So I got down to the rehearsal room last night and ran a speakon lead out of each channel of the QSC into the 2 cabs, had 50hz filter on and clip limiter switches on, parallel mode switches on, plenty of volume and sounds good, the Sansamp gain at 12 oclock and output 2 oclock, using a Fender Jazz bass in passive mode, im noticing the clip LED on each channel of the QSC is still coming when playing harder, im not hearing any distortion or anything unpleasant, is this ok ?

On 13/02/2022 at 19:29, Downunderwonder said:

Check it hasn't had one end jumpered. Should be fine if it's a mic lead but random patch leads can be weird.

One of the jack leads had melted from the bridging experiment, ive replaced the jack with a speakon, now using both channels parallel with limiter swiches on and 50hz filters on, havent had the chance to test it properly as I had to go back home to, but will after the weekend.

13 hours ago, BassmanPaul said:

Just as a question: is the Cavern still active, pandemic aside? I played there in the sixties. LOL

  yes I was in there  recently, it was packed out

7 hours ago, Downunderwonder said:

Another possibility occurred to me. If there is clip indication on all the legs into the amp inputs it would mean there might only be 1/2 the potential driving happening. You really should get an XLR cable on the job.

Ive got an XLR, ill try it to see if there is any difference 

19 minutes ago, Downunderwonder said:

Potentially half your signal then went nowhere causing the one amp channel to be under driven but I would have thought the amp would be smarter and mirror a mono input to both channels in that mode. Putting one cab on each channel will soon tell.

I noticed both of the channel clip LED lights came on 

38 minutes ago, Downunderwonder said:

Checking again, this condition was with one cab on each channel? That is the recommended setup. Did you check sound was coming out of both cabs?

I had the 2 cabs daisy chained out of 1 channel. I was under the impression that id get 600watts at 4 ohms and running 1 cab per channel would give me 360 watts at 8ohms, ive since learned that this was incorrect and the wrong way to set up.

Both cabs are working. When I get the chance I will try running 1 cab per channel in parallel with clip limiter switch on and use an unbalanced jack from the sansamp out. 

8 minutes ago, Downunderwonder said:

Not using correct terms. Speakon is for speakers!

 

Should be a balanced cable, either TRS or XLR from Sansamp to QSC.

 

If you are lighting up the QSC overload light with a clean signal, that's your lot.

 

Output to the cabs should be Speakons. If you have changed anything in the speaker cables from your old amp that would be a good place to look for a muckup.

Sorry I meant to say im using an unbalanced jack from the sansamp output 

4 hours ago, Downunderwonder said:

Just checking, you are using the 'Sansamp' XLR out from the back of the RBI set to full ( 0dB) output and turning up the XLR on the front panel?

Ive been using an unbalanced jack to speakon sansamp out

I was originally running a Ashdown ABM IV 600 head into the cabs, it had plenty of grunt, I just didnt get along with the way it sounded. 

I then went with an Ampeg SVP-Cl preamp into the QSC 1850hd and loved the sound but struggled with the low output if the preamp.

The sansamp sounds pretty good and more output than the Ampeg but not as much power as the Ashdown and lots of LED clipping from the QSC.

The cabs are Ashdown 1x15 600w and 4x10 600w 8 ohms each. 

Running in parallel 1 cab per channel would put out around 380w each at 8ohms ? I find im struggling at this level within a band situation. I was under the impression that daisy chaining 2 cabs into the one channel would bring the load to 4ohms and around 600w, ive since learned that this isnt the case with the QSC 1850hd. It seems from what im reading that bridging the amp would be the best way to gain more headroom and reduce clipping with the correctly wired speakon lead.

Im looking for some advice regarding my QSC RMX 1850HD. Im running a Sansamp RBI preamp ( which I like the sound of) into the QSC and daisy chaining 2 x 8 ohm cabs out of channel 1 to get a 4ohm load, I have the filter switches set to 50hz and also the switches set to parallel, the clip LED comes on quite frequently, I have both channels on the QSC set to full and the pre at around 12 o'clock. I also tried the bridged mono mode with the switches set to parallel, channel 2 filters and limiter off the but wasnt impressed by how it sounded. Am I doing something wrong with the way ive set it up ?

20 minutes ago, hooky_lowdown said:

It's a G2202.

I was under the impression that the G2202 only had one pickup and the G1222 was the 2 pickup version 

Hi, could anyone help me identify what model it is, its definitely not the G2220, the decals are different, the strap button is at the 13th fret rather than the 15th and the controls switch is in a different place to the G2220, im struggling to find a definitive answer. G1212 or G1222 maybe ?
 It was bought around 2001 and is made in Korea.

Thanks for all your advice and help, stacking gain on top of each other isnt a perfect solution to the output issue but it gets the job done with minimal hiss

2 hours ago, agedhorse said:

Yes, that would work fine.

It worked well, I put it between the SVP and the power amp

TUBE ULTRAGAIN MIC100 User Manual
5. Specifications
XLR Input
Connector balanced/unbalanced
Type transformerless, DC-decoupled input
Impedance approx. 2 kΩ
Max. input level +7 dBu / -20 dB with pad
¼" TRS Input
Connector balanced/unbalanced
Type transformerless, DC-decoupled input
Impedance approx. 1 MΩ
Max. input level +16 dBu / -20 dB with pad
Audio Outputs
Connectors XLR connector + ¼" TRS jack
balanced/unbalanced
Type transformerless, DC-decoupled output
Impedance approx. 700 Ω balanced,

approx. 350 Ω unbalanced
Max. output level approx. +26 dBu @ 100 kΩ

40 minutes ago, bassman7755 said:

If it were me I would go for something like this https://www.amazon.co.uk/Behringer-MX400-Micromix-Noise-Channel/dp/B000KGYAYQ?th=1 

Ive got this tube preamplifier that I use at home, im wondering if this would solve the issue

9 hours ago, agedhorse said:

The preamp output must be -10dBu nominal then. The sensitivity difference between .775V and 1.16V is insignificant in this context.

 

There are several versions of the SVP, it’s very possible that this is common with all SVP models.

Would a boost pedal between the pre and power amp solve the volume issue ? 

6 minutes ago, Bigguy2017 said:

Looks like the Ampeg pre output is low level (-10dB or less ? - not stated in the manual) and better suited to FX returns

There is very little technical information in the SVP-CL manual, it doesnt mention anything about the output level

1 hour ago, Bigguy2017 said:

What cabling method are you using? This could be a cabling issue

Im using a speakon to jack for the first cab then daisy chaining the next cab speakon to jack to get a 4ohm parallel connection.

1 hour ago, Bigguy2017 said:

As to the amp inputs you've got the option of bal XLR, mono jack or screw terminals - as the preamp outs are unbal mono I'd go jack-to-jack to the amp's jack ins with two mono jack cables.

The manual also gives the option of balanced jack. Ive been using unbalanced jack, tonight I will try a balanced jack to see if the 20kohm (balanced) to 10kohm (unbalanced) makes much difference.

11 minutes ago, NAS Bass said:

Try a power amp with a lower input sensitivity 

Ive got 2 QSC 1850hd Power amps, im considering selling them both and buying something that has the option of changing the input sensitivity from .775 to 1.5v

26 minutes ago, Steve Soar said:

Have you tried the pre into separate left and right channels?

Yes, that brings everything to 8ohms and even less headroom

2 hours ago, la bam said:

I think these are notorious for struggling to drive a power amp I'm afraid. Hopefully someone will know a bit more.

It does seem that way, if it wasnt for the boost from spectracomp compressor on my pedal board it would be completely useless for band rehearsal

Yes and full on the preamp output also