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. 

[police squad]

wowser

wowser

wowser

words fail me on just how good it sounds

bass flat

mid about 10 o clock

treble flat

ultra bass in

ultra hi in

mid swith in the middle

gain just on the edge

with a mark bass club 1x15 cab

with my 4003 it's amazing

 

I didn't even spend that long on it and found the sound

I have a couple of interesting gigs coming up in August so it'll get a proper work out

truly fat

Edited 10 hours ago by police squad

[BassmanPaul]

You make me want to put one together but I don't have speakers that would suit a 100W amp.

 

[BassAdder60]

1 hour ago, police squad said:

wowser

wowser

wowser

words fail me on just how good it sounds

bass flat

mid about 10 o clock

treble flat

ultra bass in

ultra hi in

mid swith in the middle

gain just on the edge

with a mark bass club 1x15 cab

with my 4003 it's amazing

 

I didn't even spend that long on it and found the sound

I have a couple of interesting gigs coming up in August so it'll get a proper work out

truly fat

Yep it’s a great amp for sure 

I found not using Ultra Low but more bass in my EQ and it kept the mids very punchy in the band 

 

It’s very loud for a 100w amp and has a different feel playing notes 

If you’re a pick player then Ultra Low on would definitely work 

Glad you like it 

[police squad]

5 minutes ago, BassAdder60 said:

Yep it’s a great amp for sure 

I found not using Ultra Low but more bass in my EQ and it kept the mids very punchy in the band 

 

It’s very loud for a 100w amp and has a different feel playing notes 

If you’re a pick player then Ultra Low on would definitely work 

Glad you like it 

absolutely blown away
I'll spend more time with it this week. Plug the other cab in and see how do

As you say it feels different, it's more dynamic and organic

gigs coming up will need

Mustang with flats (blues/rock gig)

New wave/ ska / mod dep (4003 with rounds) P bass with flats

Police gig 50s style P bass with rounds

 

I know its going to smash the new wave gig with the 4003

[skychaserhigh]

There's not a bad sound in that amp, just a case of choosing what works best for you. Enjoy!