--- product_id: 8625831 title: "SM Pro Audio Nano Patch + Passive Volume Attenuator" brand: "smpro audio" price: "7888CFA" currency: XOF in_stock: false reviews_count: 2 url: https://www.desertcart.sn/products/8625831-sm-pro-audio-nano-patch-passive-volume-attenuator store_origin: SN region: Senegal --- # Passive operation 2-channel control No power needed SM Pro Audio Nano Patch + Passive Volume Attenuator **Brand:** smpro audio **Price:** 7888CFA **Availability:** ❌ Out of Stock ## Summary > πŸŽ›οΈ Elevate Your Sound Game! ## Quick Answers - **What is this?** SM Pro Audio Nano Patch + Passive Volume Attenuator by smpro audio - **How much does it cost?** 7888CFA with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/8625831-sm-pro-audio-nano-patch-passive-volume-attenuator) ## Best For - smpro audio enthusiasts ## Why This Product - Trusted smpro audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact Design:** Perfect for on-the-go audio setups. - β€’ **Transparent Sound:** Experience pure audio without interference. - β€’ **User-Friendly Control:** Effortless rotary volume adjustment. - β€’ **Power-Free Performance:** No need for external power sourcesβ€”just plug and play! - β€’ **Versatile Connectivity:** 2 combo inputs and TRS outputs for seamless integration. ## Overview The SM Pro Audio Nano Patch is a super compact, 2-channel analog passive volume control that offers completely transparent operation. With 2 combo inputs and 2 TRS outputs, it features a user-friendly rotary volume attenuation control and requires no external power, making it the ideal solution for professional audio setups. ## Description Building on the success of the original M-Patch and M-Patch 2 passive attenuators, the Nano Patch is a super-compact, desktop-sized passive volume attenuator, entering the market as one of the smallest around. Perfect for working with stereo signals from soundcards, CD players, pre-amps, and mixers, it is designed to allow precise level adjustments to analog audio source material. Featuring balanced combo XLR/TRS input jacks and TRS outputs, mute switch, and a good sized rotary volume encoder, its simply one of the most affordable improvements you could ever make to your studio.The Nano Patch really comes into its own when connected between your computer audio interface/soundcard master outputs and a pair of active (powered) monitor speakers. One of the benefits of passive volume attenuation is that you no longer have to control volumes with your softwares master volume fader. Reducing levels from your software only reduces the audio bit depth. It is better to keep your software masters at unity and attenuate the audio to your active monitors with a passive controller like the Nano Patch. This way you can maintain maximum audio resolution and reduce the amplitude of your monitoring volume with the confidence that the sonic integrity of your audio is not compromised.No active circuitry, buffers, transistors, batteries, or power supply of any kind can interfere with the main passive output of the Nano Patch. It simply delivers attenuated signal. Pure. Simple. Transparent.The devices rotary control (the same pot as used in our M-Patch 2) allows precise level adjustments within 1dB from 0 to -40dB. In addition, the Nano Patch features completely balanced operation with its combo XLR/TRS input jacks, and TRS outputs.A simple problem solver, you use the Nano Patch anywhere you need to trim gain ie, reduce the volume of analog audio signals. For example, you could use one to trim the output of a microphone preamp. With its high-quality potentiometer, the SMPro attenuator p ## Features - Super compact 2 channel analog passive volume control - Completely transparent operation - 2 x combo inputs, 2 x TRS outputs - Rotary volume attenuation control - No power required ## Images ![SM Pro Audio Nano Patch + Passive Volume Attenuator - Image 1](https://m.media-amazon.com/images/I/71g6qKYQ9nL.jpg) ![SM Pro Audio Nano Patch + Passive Volume Attenuator - Image 2](https://m.media-amazon.com/images/I/71Yd7R4Bx8L.jpg) ![SM Pro Audio Nano Patch + Passive Volume Attenuator - Image 3](https://m.media-amazon.com/images/I/71bHi2n0DAL.jpg) ![SM Pro Audio Nano Patch + Passive Volume Attenuator - Image 4](https://m.media-amazon.com/images/I/71ZfvyUpBmL.jpg) ![SM Pro Audio Nano Patch + Passive Volume Attenuator - Image 5](https://m.media-amazon.com/images/I/71YPqGrAjJL.jpg) ## Questions & Answers **Q: What are the dimensions in inches?** A: The top measures 5 inches wide by 3 and 5/8 inches deep. The height is 1 and 3/8 inches in front, 1 and 15/16 inches in back. Total height at the knob is 2 and 1/4 inches. **Q: When using this device, what volume should I put my soundcard and speakers at? I am just using a stock soundcard until I purchase an audio interface.** A: I would set the volume from the soundcard at full volume. The reason for this is that in order to set proper gain structure you what to make sure you have the full line audio signal when using a volume attenuator such as the nano patch. **Q: If I use the TRS output for my speakers, and I connect in the 3.5mm output my headphones, the TRS output will be bypassed?** A: As the other helpful souls have already indicated, Rocio......your instincts are absolutely right......HOWEVER...(...and sorry if I am now about to say something that you and others may already know...)...I thought it may be a good idea to make one extra observation......and that is to point out my feeling that the MATCHING of relative loudness between whatever actual headphones and speakers are hooked up this way will be absolutely key to how well this particular "studio" setup works.My suggestion would be to try "calibrating" this set-up via the following five steps:1) After hooking up your speaker and headset cabling, turn the Nano Patch gain down to its absolutely "off" position ...and...2) Do the same at the level control on your powered loudspeakers.3) Select a well-mixed track that you love, ...preferably one featuring a solo vocalist "out front and centre" from well-balanced full-spectrum instruments that have lots of "tish" (tops) and "thump" (bass) ...and start it playing.4) Put on your headsets and only open the Nano Patch level control to the point where the backing instrumentation is ONLY JUST clearly audible behind the "front and centre" featured sound.5) Now, take off your headsets, assume the position from where you normally listen to your speakers ...and gently raise THEIR level control to where the level of those speakers seems to MATCH that of your headsets. (I reckon it may well take quite a bit of headsets on/headsets off/headsets on again activity, maybe with a variety of replayed tracks over an hour or so, before you find this "golden" matched setting.)Once you've done all that, cut a tiny triangle of suitably coloured electrical tape to mark this "calibrated" point on your powered speakers, because once they're set there, the Nano Patch rotary control should be all you'll need to change the overall loudness of either or both monitoring systems, but ONLY for that particular make and model of headset with THOSE actual speakers. **Q: my guitar amp goes from silent to way-to-loud at one spot on the Master Vol, will this let me set vol at way-to-loud and decrease the sound to usable?** A: Dear Rocket Dog, your amp probably has a bad potentiometer, its about a 3 dollar part. You could use the nano patch but its a passive, relatively low impedance device that will load your pickup and probably change its tonal qualities. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Handy Headroom Helper *by R***M on Reviewed in the United States on November 28, 2012* First, I'll address what's wrong with it. (Five out of five stars ...and I'm talking about what's WRONG?)Just three things...Yep, its push-on plastic knob, its light-weight "mute" switch and the slightly scratch-prone nature of its front-panel finish are almost, but NOT quite, up to the expectations of "bullet proof" ruggedness that the silky and satin-like operation of its volume control and the elegance of its overall design make you expect.That's all. That is absolutely ALL I could find wrong with this little "life saver".Nit-picking? Pedantic? Overly fussy?Given that the SM Pro Audio NanoPatch has proven to be a reasonably rugged, sonically transparent and (above all) ACCURATE problem solver (for less than the price of a half-decent bottle of Scotch) ...guilty as charged Your Honour.If you're a non-technical user, that's probably all you need to know.For the rest of us, ...I'm an antipodean Audio Director with over forty years of ongoing experience, most of it live and on location. A veteran Sound Supervisor who wishes he'd had this little box in his kit from the very beginning.Why?Because conveniently attenuating "downstream" audio (in order to maintain the correct gain structure "upstream") has hitherto relied upon my collection of XL "connector-barrel-enclosed" fixed attenuators. Transparent and rugged, certainly, ...but their fixed attenuation meant carrying a weighty assortment of such metal-enclosed attenuators, (having values "stepped" in 10dB increments from -10dB to -60dB) with a pair of matched values being required for stereo.Instead of which I now use this cheap, light weight and (above all) tiny box, that allows me to instantly "dial in" matched pairs of exactly the values required.Not only that, but left to right "tracking" is maintained all the way down to -60dB and its front-panel indications, while never intended to be "lab-accurate" to a single decibel, are VERY close to the truth indeed.Balanced or unbalanced? No problem.High or low impedance? Fine, within the parameters of its intended use.It's exclusively a line level device, so the lowest it would normally encounter would be 600Ξ©, ...and the device undoubtedly DOES induce a tiny amount of roll-off at both ends of the frequency spectrum when it is "seeing" below about 1kΞ©.Such use is rare, normally being reserved for telco lines where this tiny amount of bandwidth restriction may well help anyway.Any other "interstage" insertions invariably present over 2kΞ© to this attenuator, with five to ten times that being the norm ...and I've not experienced ANY artefacts induced by the insertion of this device into such signal paths at levels nominally ranging from -20 to +4dBm.To me, that makes it the cheapest way of obtaining a "classy" calibrated stereo "volume control" for anything "downstream", be it a workstation's powered loudspeakers or an entire separate system.There's certainly nothing the least bit cheap, tiny or tinny evident in the resultant audio, ...audio that truly is "five star". ### ⭐ 1.0 out of 5 stars Very concerning failure rate, serious build-quality issues *by D***7 on Reviewed in the United States on September 10, 2014* Full disclosure, I bought one of these from a distributor other than Amazon, which I won't name. I don't know if that had anything to do with it. I don't think it should as it's the same product.First the good:This seems to be the only "big-knob" volume attenuator under $100 (and possibly even under $200) that has a simple two lines in, two lines out approach, and printed numbers. The only other one I could find that came close was the TC Level Pilot, which is more expensive and doesn't have graduated dB numbers printed on it. Having to spend any more than this is a real bummer if you're just looking for a simple way to control your volume with consistent results. Everything else I found was equipped with some kind of switching, and was in a completely different price range. Oh and the Nanopatch looks great on your desk, and the mute button is very convenient.Now the bad. I hooked it up and I immediately (out of the box) had a problem with an intermittent right channel. If I touched the plugs going into the back of the Nanopatch, the signal would cut in and out. I ruled out any problems with my cables and my plugs. After wiggling stuff around and messing with it, it eventually settled out to the right channel having have the volume of the left. I returned it as defective and the distributor sent me a replacement.THIS SECOND ONE one also had issues right out of the box. It was a slightly differeThe right channel would intermittently cut in, drop to half volume, or cut out completely - but it didn't seem to have anything to do with moving things around - it would cut in if I played something very loud and then it would eventually cut out again. I checked all my cables and plugs again as I thought I was going nuts, but sure enough, I could easily prove that it was a problem in the Nanopatch (by swapping the L and R channels independently).I needed this to work very badly, I didn't want to go through sending it back again, and I am fairly good with electronics. So I decided to fix it myself. With a balanced signal, having half-signal output usually means you have lost one conductor (since the signal is sent across two conductors plus ground). I disassembled it and did some troubleshooting with a multimeter. Here is what I found:1. The right channel issues were due to a cold solder joint in the header of one of the two ribbon cable headers. I resoldered this header and the right channel was no longer intermittent.2. In fact, it was now TWICE the volume as the left channel, uncovering the fact that the left channel had been having an issue as well. Again I checked through the signal path and discovered that there was a bad trace on the board connecting pin 2 of the XLR connector. Despite there being no visible break, this trace was not actually conducting. I couldn't believe it until I bypassed it with a wire, and the left channel was the same volume as the right channel. At that point everything sounded perfect. I shook the box, moved cables, pushed/pulled the plugs, everything was totally solid.So there were two defects in this thing that were directly related to workmanship issues. The connector was a poor soldering job, and the trace can only be explained by a poor PC board manufacturing. However, BOTH of the issues managed to get through their QC. And that happened with TWO SEPARATE UNITS in my own experience. What are the chances of that? (Granted, because both of these units came from the same distributor, they were most likely manufactured back-to-back and shipped in the same batch).Now that I have the thing working, I can say that it sounds very transparent, has an accurate volume control, the mute button works well. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/8625831-sm-pro-audio-nano-patch-passive-volume-attenuator](https://www.desertcart.sn/products/8625831-sm-pro-audio-nano-patch-passive-volume-attenuator) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-06-23*