Davi

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 ?

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

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

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

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

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

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. 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.

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

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

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

Hi, Im currently using an Ampeg SVPCL preamp into a QSC 1850hd power amp, into 2x8ohm cabs daisy chained single channel with parallel switches engaged on the power amp, ive noticed the output of the Ampeg is very low and is possibly due to a voltage mismatch. What would be a good solution to this problem ? Maybe adding an EQ between the preamp and power amp or perhaps a boost pedal at the end of the pedal chain, im not sure. Any help would be appreciated. Many thanks