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NAD - Fender ACB 50

It's rare for me to be interested in a Fender bass amp or even any brand tube amp, and well, I am. I bought the Rumble 500 (350 Watts) five years ago. It's been great. I also haven't looked at any bass amp or even any online shopping/GAS-ing since. I have no reason to get another bass amp, but I'm interested enough in this to seek it out in real time, and give it a real chance on a vintage vibe/vintage tube sound premise... Even if I'm currently not in any band situation where this would unquestionably work in terms of wattage and sound characteristics. A $2,000 estimated "basement amp" is probably where it will be for the forseeable future, but it seems like a very interesting Fender bass amp product, and I'm at least curious.
I have a Rumble 500 and 200. Great amps, I think I prefer the 200 myself. Do you use the vintage setting or just plain? I don't find the OD that useful on them, would need a pedal to add the right amount of hair. The ACB gives a bit more colour on the flats I use (760FLs and Chromes on my jazzes).
 
Well, I don't know if Adam Clayton is exaggerating when he says "it will change your life", but I took the plunge when I saw it on special and finally achieved my dream of tubey goodness!

I told my wife it was a Christmas present, and she got a new capo so it's worked out well. Apart from a minor hiccup with a blown fuse (an under-rated one had been installed) I haven't stopped smiling :)

This amp is perfect for me , can jam at home but it's still loud enought for drums. It's quite loud actually. The tones on the two channels are spot on for the music we like: a mid-forward channel for those trad R&B / blues / classic rock sounds, and a flat channel which sounds more modern (with treble and bass boosts).

I have a Rumble 500 and 200. Great amps, I think I prefer the 200 myself. Do you use the vintage setting or just plain? I don't find the OD that useful on them, would need a pedal to add the right amount of hair. The ACB gives a bit more colour on the flats I use (760FLs and Chromes on my jazzes).
Looks very tasteful. How does your new tube Fender compare to a Rumble 200?
 
Nice shot of the rig! What sort of music are you playing? Does the amp give you enough stage volume?
Thank you. We play Americana covers.. 5 pc.. good stage volume but I did have FOH support and a monitor mix as well. But i wasn’t pushing the amp and it reproduced what I dialed up.
We’re on rotation in a bunch of rooms and I know the layout and acoustics in advance...it will work in some of those rooms and not in others. I will test it with an extra cabinet soon… I will try one of my Bag End 15’s …
 
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Looks very tasteful. How does your new tube Fender compare to a Rumble 200?
What I first noticed was how punchy and articulate the ACB was. The speaker plays a part in that I think. A fat but "focused" sound (thank you mids), very responsive and touch sensitive, and something hard to explain but the transients pop nicely while the sound which comes after sort of settles if that makes sense. So a mix of tone, articulation and response. It makes the flats sound even nicer. I've not been able to get any break up yet, stuff was rattling around in the house too much as I pushed the volume.

So going back to both my Rumbles, they still sound great, but if I use the vintage button to thicken the sound it also muddies it a bit. I tend to leave it off, but that's also a compromise and there's no way of adding a hint of OD because the inbuilt option is not subtle and thins out the bottom end. You can EQ for that, but then it's not footswitchable to the other setting without redoing the EQ. The Rumbles sounded great with the JHS Punchline, but that bypasses the preamp and tone controls.

So in short, I like the Rumbles a lot, and they outperform their price point, but they have some compromises. They're certainly a lot lighter.... :)

The sound I'm chasing in my head is Jerry Jemmott or an early 70s rock bass with some break up. Spotify says my listening age is 69...
 
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Thank you. We play Americana covers.. 5 pc.. good stage volume but I did have FOH support and a monitor mix as well. But i wasn’t pushing the amp and it reproduced what I dialed up.
We’re on rotation in a bunch of rooms and I know the layout and acoustics in advance...it will work in some of those rooms and not in others. I will test it with an extra cabinet soon… I will try one of my Bag End 15’s …
It's a shame Fender cabs are all different sizes. The Rumble 115 is slightly narrower. I wondered about daisy chaining a Rumble combo on it's side, but that's a bit small too. Someone on the ACB Owners Club thread built a matching cab which looks great!!!
 
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It's a shame Fender cabs are all different sizes. The Rumble 115 is slightly narrower. I wondered about daisy chaining a Rumble combo on it's side, but that's a bit small too. Someone on the ACB Owners Club thread built a matching cab which looks great!!!
I was going to research that as well..having a matching cabinet would be great..
 
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Cheers, bass is a stripped back Flea with new Lavaguard and covers. Small mod project for me. Otherwise stock.
Have you shared your beauty here?

 
Have you shared your beauty here?

Yes indeed, right here:

Post in thread 'Fender Flea Road Worn Jazz Bass Club' https://www.talkbass.com/threads/fender-flea-road-worn-jazz-bass-club.1443156/page-22#post-28775134

I got mine from someone who bought it in 2016 I think. There's a couple of second hand one for sale here online at the moment, it's great value for money. Possibly the colour is not everyone's favourite though.
 
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I've been jonesing for a ACB since it was released. Was afraid the tone is too close to my TV so I went for an Aguilar TH500 and 2 SL112s instead. As much as I love this Aggie rig, I always wonder if I made the right move. There is just something so right about tubes and a 1x15.
It does sound a lot like the TV 15. I have both and they are close, but the ACB just has that tube "air" about it that the TV can't get to. Also, channel 2 is just wild with the tone and bass. Tube tone in spades.
 
What I first noticed was how punchy and articulate the ACB was. The speaker plays a part in that I think. A fat but "focused" sound (thank you mids), very responsive and touch sensitive, and something hard to explain but the transients pop nicely while the sound which comes after sort of settles if that makes sense. So a mix of tone, articulation and response. It makes the flats sound even nicer. I've not been able to get any break up yet, stuff was rattling around in the house too much as I pushed the volume.

So going back to both my Rumbles, they still sound great, but if I use the vintage button to thicken the sound it also muddies it a bit. I tend to leave it off, but that's also a compromise and there's no way of adding a hint of OD because the inbuilt option is not subtle and thins out the bottom end. You can EQ for that, but then it's not footswitchable to the other setting without redoing the EQ. The Rumbles sounded great with the JHS Punchline, but that bypasses the preamp and tone controls.

So in short, I like the Rumbles a lot, and they outperform their price point, but they have some compromises. They're certainly a lot lighter.... :)

The sound I'm chasing in my head is Jerry Jemmott or an early 70s rock bass with some break up. Spotify says my listening age is 69...
Thanks for all that detail. I have a Rumble 200. After trying many amps and cabs I settled on the Rumble because I can't really fault it, and it's light and easy to move around. From your description the tube option only offer more if you're going for a bit of warm fuzz?
 
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Thanks for all that detail. I have a Rumble 200. After trying many amps and cabs I settled on the Rumble because I can't really fault it, and it's light and easy to move around. From your description the tube option only offer more if you're going for a bit of warm fuzz?
Basically yes. It's 4x the price of the Rumble 200 so there's a quality step up, but like everything else it's diminishing returns. I'm playing my 200 now as it happens, I have it at another location. I prefer 115 to 210.
 
Congrats on the new amp; I just managed to pick one up as well used for $1150. Super good deal I think, and it is in great shape and was local to me. I hope you enjoy it! Here is mine:
20251116_164949.jpg
 
I have a Rumble 500 and 200. Great amps, I think I prefer the 200 myself. Do you use the vintage setting or just plain? I don't find the OD that useful on them, would need a pedal to add the right amount of hair. The ACB gives a bit more colour on the flats I use (760FLs and Chromes on my jazzes).
Thanks for asking. Actually, I use the "Bright" setting with the tweeter ON, always. I want that Mark King/Level 42/Marcus Miller kind of top end and slap/funk tone. I've never really used the overdrive setting on the amp. I don't dislike it, but I have a very small pedalboard (tuner to chorus to overdrive) where I have all the effects in one place and I can EQ the overdrive right on the pedal, and also I'm not going to string another cord out on the stage to activate the footswitch and channel switching capability of the amp, nor am I going to turn around and manually engage the overdrive section directly on the amp. So pedal overdrive next to my mic stand it is.

As cool as it is, I'm not in any situation where I think I'd choose ACB over the Rumble 500 based on the music I currently play in the bands, or the way I play, but I could see a situation where the ACB could be a viable gigging amp... but I'm just not in such a situation, and haven't been for a long time. Right now, the ACB would be a super-nice basement practice amp.

But I still want to try one and quickly put it through my normal paces for amp demos.
 
Thanks for asking. Actually, I use the "Bright" setting with the tweeter ON, always. I want that Mark King/Level 42/Marcus Miller kind of top end and slap/funk tone. I've never really used the overdrive setting on the amp. I don't dislike it, but I have a very small pedalboard (tuner to chorus to overdrive) where I have all the effects in one place and I can EQ the overdrive right on the pedal, and also I'm not going to string another cord out on the stage to activate the footswitch and channel switching capability of the amp, nor am I going to turn around and manually engage the overdrive section directly on the amp. So pedal overdrive next to my mic stand it is.

As cool as it is, I'm not in any situation where I think I'd choose ACB over the Rumble 500 based on the music I currently play in the bands, or the way I play, but I could see a situation where the ACB could be a viable gigging amp... but I'm just not in such a situation, and haven't been for a long time. Right now, the ACB would be a super-nice basement practice amp.

But I still want to try one and quickly put it through my normal paces for amp demos.
Yep for that type of sound I can definitely see the 500 as a better choice, as well as being more portable.