Ampeg V4B v Ashdown CTM100

[skychaserhigh]

I tend to back off bass slightly, small boost of 800 and treble. Sounds great with a Jazz or Precision. 

[The fasting showman]

Everyone has gone against what I was going to say, be drastic! That mid control is like a Mini Moog, those amps have a lovely smooth treble so I used to engage ultra hi even if treble is at noon.

 

I owned a mk1 SVT for a while but preferred the v4b ( late 70s), for me even though they're brand siblings that share an active switchable mid with massive boost, making each anp work to it's strengths was completely different, I found anyway. 

I never got to try the old v4b through an 8x10 so I guess the cabs being used would have caused the difference maybe.

Edited Wednesday at 19:35 by The fasting showman
Explanation

[Beer of the Bass]

On 22/07/2025 at 18:19, The fasting showman said:

I found that really interesting. The valve ( tube) compliment on the old version doesn't mention the 6k11 compactron valve that drives the mid circuit. 

 

What valve does that job in the new model?

 

I've owned a couple of v4Bs, of the valve amps I had they worked well for me, paired with a Marshall vbc412 in particular. 

 

There have been a few different versions of Ampeg's active midrange EQ in different models over the years. They all use a multi-tapped inductor in a similar way, but they've used several different valves to do it.