I have a larger-than-I-really-need collection of dirt pedals that are either specifically low gain or can do a very good low gain and, as I’m sure you’re well aware, I’m also a big Stingray fan, too.

I typically use three different dirts on my pedal board: one for my standard tone and set for pretty low gain (just enough to add some very light drive that warms it up), one set for a little more gain than my standard tone and brighter than it, and one set for a little more gain than my standard tone and darker than it.
I REALLY love my Broughton FlipTop as my standard tone though it does add some color (think old Ampeg B15) - but it’s a wonderful color! It's very low gain but it does what it does exceptionally well.
For a change of pace, I also use a Spacemen Effects Saturn VI as a standard tone and that’s actually what’s on my board right now. Spacemen actually calls it a harmonic booster because it has separate controls for both even order and odd order harmonics, as well as a passive tone control. I find it to be quite transparent, especially when favoring the even-order harmonics (the Boost knob) and blending in the Drive knob (odd-ordered) for a touch or the dirt that gets noticeable when I hit the strings harder.
FWIW, I specifically said “standard tone” rather than “always on tone” because I don’t stack my dirt pedals, so none of my ODs are always on. So the one I use most I call my standard tone. Yeah, that’s picking nits, but it helps better explain how I use my pedals.
Another transparent one I like is the JPTR FX Jive. Because I tend to stick with relatively low gain, I tend to use only the Gain knob without engaging any of the clipping diodes. I think it works nicely that way and is fairly transparent for my purposes, even with the gain up around 2:00
I also LOVE the Blueberry circuit, probably my favorite drive flavor, and use a Bearfoot FX Blueberry as my darker toned, slightly more driven tone and think it’s heavenly, especially on blues songs and older classic rock. At low gain I find it pretty transparent but it will color your tone more at higher gains (I rarely go about 12:00, though). I also have a One Control Blackberry and a Bearfoot FX Queen Bee, which are two different variants of the Blueberry circuit. I prefer the simplicity of the basic Blueberry myself, but the other two are also excellent and my impression is that they have a little less overall gain than the Bearfoot FX version, especially the Blackberry.
I have several other low gain drives worth mentioning for your application, but these will impart some kind of color:
- I love the One Control Hooker’s Green Bass Machine, which I find somewhat Blueberry-like. This one does NOT lose low end – I find it pretty beefy. I have the original three-knob with a bass level control that you access via a screwdriver on the side of the chassis. But they now have a 4-knob version that the old bass control up to the top of the chassis with the other knobs. The videos I watched make me think it sounds much the same as the original.
- The SolidgoldFX Beta is a great low gain drive, but it’s pretty colored (though it’s a really nice color!). I have the original version, not the II which has the mid switch or the current V, which has several other controls. It does a great lower gain, old school tone, especially for a Motown kind of tone.
- Also consider the Way Huge Pork Loin, which has a ton of tonal control and can be set to be not too colored at low gain. I haven’t had it on my board very often, but I really do need to use it more.
- This one was pretty much hated when it first came out but I really like it a lot – the EHX Bass Soul Food. It reveals more color as you raise the Gain above 2:00-3:00 and the Treble above noon but I love it with the Blend knob about noon, the Gain below 3:00, and the Treble no higher than noon (if I need more definition, then I’ll boost the treble on my bass). It truly is low gain, so if you use it the way it was intended and don’t push the Gain too high, it’s a great sounding pedal. YMMV.
- I almost always use my Broughton SV-Pre as my dirtier and brighter than my standard tone pedal, but I keep the gain below noon. Even with the Ultra Low switch in the middle setting (basically flat), it still has plenty of low end and I also turn on the Bright switch. It also has a selectable mid frequency and a mid boost or cut. It can get dirtier than I need (by a lot), but it works great for me with the gain set below noon. It does have an SVT-like color but, again, at low gain it’s not too obvious and it sounds great.
- My [sfx] Micro Red Dragon is a great sounding low gain drive, also kind of Blueberry-like to my ears, but these have been discontinued for several years and are just plain hard to find. I was lucky that I happened to see the listing on Reverb for this a short time after the seller posted it, so I was able to grab it.
Yikes, sorry for the long post. I got started and couldn't close the floodgates.

But I like the low to med gain tone of these and they sound especially good with my Stingrays.