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Best preamp for "clean" bass sounds?

That good, huh? Been thinking about one for my Jazz...
Could not be happier with the J Retro. It's 3 screws and snap in the pickup leads. Box to bass installs in about 1 minute. Several knob options. Love it. And a very basic passive option if the battery fails.

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So I recently purchased a Microtubes X7 and I absolutely love the distorted sounds I can get out of it. It's a beast of a pedal. I can get some pretty decent clean sounds out of it too but I'd like to buy another preamp that can do better. I know the DG Harmonic Booster seems to be the obvious choice but I've heard people get some really good clean sounds out of the SansAmp also. Just curious, what preamp do you guys recommend for getting a good clean tone? I play mostly rock and some metal. I know it really depends on what sound I'm looking for. I play mostly modern rock (Tool, A Perfect Circle), classic rock (Black Sabbath, Led Zeppelin) and some metal. I'm mainly just looking for something versatile with really good sounding hi-mids and a tight lowend. I'm pretty much trying to decide between the Harmonic Booster and the SansAmp but I'd like to see what some other people suggest before I make up my mind and buy something...
There are two preamps i like in that arena. First let me say I generally look to a preamp for clean tone and will add dirt when necessary with a dedicated pedal.

Mesa Subway DI - Great clean tone and versatile.
Ampeg SCR-DI - It IS the Ampeg tone not an emulation. I don't use the scrambler side of the pedal

If you're looking for a rack pre... I have an Ampeg SVT-iiP I've had forever and can recommend that highly as well...if you can find one
 
So I recently purchased a Microtubes X7 and I absolutely love the distorted sounds I can get out of it. It's a beast of a pedal. I can get some pretty decent clean sounds out of it too but I'd like to buy another preamp that can do better. I know the DG Harmonic Booster seems to be the obvious choice but I've heard people get some really good clean sounds out of the SansAmp also. Just curious, what preamp do you guys recommend for getting a good clean tone? I play mostly rock and some metal. I know it really depends on what sound I'm looking for. I play mostly modern rock (Tool, A Perfect Circle), classic rock (Black Sabbath, Led Zeppelin) and some metal. I'm mainly just looking for something versatile with really good sounding hi-mids and a tight lowend. I'm pretty much trying to decide between the Harmonic Booster and the SansAmp but I'd like to see what some other people suggest before I make up my mind and buy something...

I had myself in the same exact position as you, but a little different on the music tastes. No classic rock for me, just 80's metal Megadeth/Testament/Metallica (early)etc or hair bands (which a lot of them do have a really clean bass sound). I had nailed the clean bass part first with my Two Notes Le Bass preamp pedal. It has the 12AX7 tube so it gives that really nice warmth to the cleans, especially the really low bassey notes. You like emphasis on the clean mids and the right side of the the Le Bass has those controls, plus you can stack the two sides and still make use of the tube. Then I was looking for that newer metal bass tone (not the whole band tone) like your Tool band or Periphery for my old 80's metal groups so I bought the Microtubes X DG pedal and 'tamed' the distortion just a bit and its the perfect thing for like Megadeth. But I dont know, I saw that one guys picture of the Sans Amp with the para-metrics and I think I will check that out myself.
 
Over the years, I've had many different preamps. They have all been excellent.

1. Trace Elliot SM/SMX series rackmount. I will never not recommend these.
2. Trace Elliot V-Type rackmount. Like the Alembic F1-X, this is based on the Fender Dual Showman circuit, and has been well-regarded for 25 years since it was introduced in 1995.
3. SWR Interstellar Overdrive rackmount. I actually found myself using the solid-state side more than the tube side, but that's not because the tube side is bad. Bonus: built-in 5 W tube power amp can be used as a practice amp
4. JoeMeek VC1Qcs channel strip (rackmount). This makes an amazing bass guitar preamp, plus you get a built-in optical compressor that is fantastic.

Pedals on my list to buy/try;
1. DSM/Humboldt Simplifier Bass Station
2. Tech21NYC Q\Strip (and maybe SansAmp BDDI v2, PDDI v2, and VTBD)
3. Mesa Subway and/or Subway+
4. Fishman Platinum Pro

Others I like:
Darkglass Microtubes B7K Ultra v1 (but only clean)
SansAmp RBI and RPM rackmounts

What's on my bass pedalboard right now:
Boss AD-2 Acoustic Preamp
Boss BB-1X Bass Driver

Current amp:
Mesa Walkabout

The problem is, there are just so many great preamps out there, and I really don't need them all.

For awhile in the 2000s, I was bringing a 12-space rack to gigs, loaded with the SWR 'Stella, the Trace Elliot V-Type, and the JoeMeek VC1Qcs, and was planning on adding the SansAmp RBI to that rack. I was using those to feed an SWR Power 750 power amp (in the same rack), and it was an incredible rig. Totally overkill, of course. I had so many sounds and options at my disposal, when I really only needed one.

It made me happy to have my little preamp museum. I adored every single piece in that rack, and I honestly wish I hadn't been forced to sell them all off due to financial disaster later in life.
 
I will add another upvote for the Mesa Subway + DI, I recently got one, and it replaced my previous DI's and my broughton HPF/LFP pedal. It is a huge pedal, and was shocked by how large it was. If you can get past the size and price, I would recommend one.

Yes, it was much larger than I expected, too. I guess my eyes glossed over reading the dimensions or something. It's roughly twice the size of a "normal" pedal.
 
For a clean sound (my preference), in order of least expensive to most expensive, ones I have owned and used and would recommend are the Broughton Messenger, The Grace Designs Alix, the A-Designs REDDI, and the Noble DI. If I want versatile then put I put the effect pedal of choice in front of it.
 
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IMHO there is some kind of misconception of "clean" tone in context of a mix. Sometimes while we hear clean tone, indeed it is not. Some mild overdrive and light grit could give us perception of clean bass tone audible among other instruments. And sometimes true clean tone could lost top end details and nuances under heavy guitar tones.
 
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Look no furþer þan Tech 21! If þe sansamp isn't clean enough, use þe Q Strip. Noþing is really cleaner þan a tech 21 Q strip. Þe setup shown here can do boþ clean & metal style tones very well.
 
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