--- product_id: 37158569 title: "Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black)" brand: "nobsound" price: "€ 104.34" currency: EUR in_stock: true reviews_count: 8 category: "Nobsound" url: https://www.desertcart.pt/products/37158569-mini-fully-balanced-single-ended-passive-preamp-hi-fi-pre store_origin: PT region: Portugal --- # Switchable XLR/RCA Input & Output Compact Sleek Black Metal Design ALPS 09 Quadruple Balanced Potentiometer Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black) **Brand:** nobsound **Price:** € 104.34 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your active monitors with pure, balanced control—because your sound deserves the best. ## Quick Answers - **What is this?** Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black) by nobsound - **How much does it cost?** € 104.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/37158569-mini-fully-balanced-single-ended-passive-preamp-hi-fi-pre) ## Best For - nobsound enthusiasts ## Why This Product - Trusted nobsound brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pure Sound Integrity:** Passive design ensures zero signal coloration—hear your music exactly as intended. - • **Versatile Connectivity:** Seamlessly switch between professional XLR and consumer RCA interfaces for ultimate flexibility. - • **Space-Smart Form Factor:** Compact footprint fits perfectly on any desk without cluttering your audio setup. - • **Effortless Volume Mastery:** Smooth, tactile knob lets you dial in precise levels—no distortion, no fuss. - • **Audiophile-Grade Components:** Premium ALPS potentiometer and NEUTRIK connectors guarantee smooth, reliable volume control. ## Overview The Nobsound Mini Passive Preamp is a compact, high-quality volume controller designed for active monitor speakers. Featuring a premium ALPS 09 fully-balanced potentiometer and professional-grade NEUTRIK XLR and RCA connectors, it offers switchable input/output modes without any amplification or signal alteration. Its sleek black metal design fits seamlessly into any professional audio setup, delivering pristine, uncolored sound with precise volume control. ## Description The Best Choice for Active SpeakersMore and more audiophiles find that the behavior of normal multimedia speakers cannot meet their demands, and then they choose professional active monitor speakers. However, this kind of speakers usually doesn't have a volume controller, which means a pre-amplifier is needed.Active monitor speakers are mostly placed on the desk and used for near field listening. So they need to consider the area required for Hi-Fi pre-amplifiers (normally very big). What'more, different pre-amplifiers may differ in their timbres and this is the most bothersome issue.As an audiophile brand, Nobsound decided to solve this problem and designed this product. Its small size won't take much place and its clean silver color suits for various usage scenarios. There is no amplifying circuit in the device and won't change the timbre, while the amplifier in the active speaker is enough to drive it. With this product, you can enjoy the most original timbre and quality of the speakers and won't be trapped in the selection of pre-amplifiers. Specifications:Dimension: 148 x 48 x 80 (mm)Weight: 0.6 (Kg)Impedance: 50KΩInput: RCA / XLR (selection switch)Output: RCA / XLR (selection switch) Package:1 * pre-amplifier Review: Better than hoped for my needs - I bought the Xduoo MT-604 hybrid amp, which has separate volume controls for right and left ears (annoying). Furthermore, the volume ramp up on this amp was SO FAST for each knob. THEN I hooked up my new Hifiman EF400 as a DAC, which seemed to overdrive and distort the inputs on the MT-604. My Focal Clear and Spirit Torino Radiante sounded too sharp/abrasive. This wee volume knob solved ALL of these problems. I can raise the volume on the hybrid amp way higher (probably getting more out of the amp), and I can control the volume with ONE knob. In addition, the output from the Hifiman DAC no longer runs hot into the amp, so the distortion is gone. IN ADDITION (big suprise), my formerly sharp Focal Clears and Radiante both sound well-tuned and easy to listen to. They sound fantastic now on the same hybrid amp. So, for me, I'm overjoyed by this product. That said, I'm not sure whether an impedance "issue" with this knob may be changing the sound signature of the output in ways that may be problematic for other users, or whether simply tempering the hot DAC output and cranking the amp "balanced" the headphone sound. So there may be a problem lurking for others with different gear, but for my situation I am extremely pleased. Everything sounds and feels excellent. No issues in my very short time with it. The price and value are fantastic relative to most alternatives. I very highly recommend at least trying this product if you have a similar need. Review: Does exactly what it was designed to do... and does it well. - Remember this is just a volume knob that can switch from RCA to XLR on inputs and outputs. That is it. All and everythign it does... I'm using it to control volume and switch between the Pre-amp in my Cambridge DAC (XLR in) and the Pre-amp on my turntable (RCA in) before going to my Crown XLS 1502 Amp (XLR out). There is no noticeable noise or anything added at high volume, to my ears anyways, which can't hear most mid-range anymore but are extremely tuned to very quiet high and low frequency according to my hearing tests at work. Volume knob is super smooth, but sturdy. Switching between XLR an RCA is tactile and firm, and should last as long as you don't sit and play with it. The box is small, but dense. The quality should honestly be good enough for most "audiophiles" even. ## Features - This product uses the expensive ALPS 09 quadruple fully-balanced potentiometer, NEUTRIK XLR, Pro-Singnal RCA. Nobsound never be stingy in the components and materials of our products. - This prodcut has a small size, while is still euipped with commonly-used interfaces. There is a selection switch which you can choose the fully-balanced or single-ended audio signal mode, as well as the output or input mode. - This prodcut has no amplifying circuit and won't change the timbre. You can enjoy the most original sound of your active monitor speakers. - Its clean black appearance suits for almost every usage scenarios. - PLEASE NOTE: This is a PASSIVE PREAMPLIFIER. It has NO amplifying circuit. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MXC9HHW | | Best Sellers Rank | #48,907 in Electronics ( See Top 100 in Electronics ) #290 in Audio Component Amplifiers | | Brand | Nobsound | | Color | Black | | Compatible Devices | Active monitor speakers, possibly some musical instrument amplifiers | | Connector Type | rca,xlr | | Customer Reviews | 4.3 out of 5 stars 181 Reviews | | Enclosure Material | Metal Or High-Quality Plastic | | Item Dimensions D x W x H | 1.89"D x 5.83"W x 3.15"H | | Item Weight | 1.1 Pounds | | Manufacturer | Nobsound | | Material | Metal Or High-Quality Plastic | | Mfr Part Number | 4330356338 | | Model Name | Mini Fully-Balanced/Single-Ended Passive Preamp | | Model Number | 4330356338 | | Output Channel Quantity | 2 | | Output Wattage | 1 Watts | | Power Source | Corded Electric | | Product Dimensions | 1.89"D x 5.83"W x 3.15"H | ## Product Details - **Brand:** Nobsound - **Color:** Black - **Compatible Devices:** Active monitor speakers, possibly some musical instrument amplifiers - **Material:** Metal Or High-Quality Plastic - **Output Wattage:** 1 Watts ## Images ![Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black) - Image 1](https://m.media-amazon.com/images/I/615Y5WVy0+L.jpg) ## Questions & Answers **Q: Is the reason for this box to convert unbalanced rcas to a balanced xlr signal? it’s just for defeating possible unbalanced signal noise?** A: I think most people purchase this box for volume control. It has a high quality potentiometer for this purpose. It will convert an RCA input to a balanced, XLR, output. But it would probably be more cost effective, and space saving, to purchase RCA to XLR cables if that’s all you want to do. **Q: Does this preamp output +4dBu or -10dbV?** A: Hello. This is a fully passive preamp with no amplification function. **Q: Is the case (including front panel) made of metal?** A: Yes, all metal. It is a ver solid unit. **Q: Can i use this between an amp (Topping MX3) and powered speakers to protect the speakers amp?** A: No. It would make more sense to use the headphone output and find a splitter to connect it to your powered speakers. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Better than hoped for my needs *by J***L on June 16, 2022* I bought the Xduoo MT-604 hybrid amp, which has separate volume controls for right and left ears (annoying). Furthermore, the volume ramp up on this amp was SO FAST for each knob. THEN I hooked up my new Hifiman EF400 as a DAC, which seemed to overdrive and distort the inputs on the MT-604. My Focal Clear and Spirit Torino Radiante sounded too sharp/abrasive. This wee volume knob solved ALL of these problems. I can raise the volume on the hybrid amp way higher (probably getting more out of the amp), and I can control the volume with ONE knob. In addition, the output from the Hifiman DAC no longer runs hot into the amp, so the distortion is gone. IN ADDITION (big suprise), my formerly sharp Focal Clears and Radiante both sound well-tuned and easy to listen to. They sound fantastic now on the same hybrid amp. So, for me, I'm overjoyed by this product. That said, I'm not sure whether an impedance "issue" with this knob may be changing the sound signature of the output in ways that may be problematic for other users, or whether simply tempering the hot DAC output and cranking the amp "balanced" the headphone sound. So there may be a problem lurking for others with different gear, but for my situation I am extremely pleased. Everything sounds and feels excellent. No issues in my very short time with it. The price and value are fantastic relative to most alternatives. I very highly recommend at least trying this product if you have a similar need. ### ⭐⭐⭐⭐⭐ Does exactly what it was designed to do... and does it well. *by W***W on January 17, 2019* Remember this is just a volume knob that can switch from RCA to XLR on inputs and outputs. That is it. All and everythign it does... I'm using it to control volume and switch between the Pre-amp in my Cambridge DAC (XLR in) and the Pre-amp on my turntable (RCA in) before going to my Crown XLS 1502 Amp (XLR out). There is no noticeable noise or anything added at high volume, to my ears anyways, which can't hear most mid-range anymore but are extremely tuned to very quiet high and low frequency according to my hearing tests at work. Volume knob is super smooth, but sturdy. Switching between XLR an RCA is tactile and firm, and should last as long as you don't sit and play with it. The box is small, but dense. The quality should honestly be good enough for most "audiophiles" even. ### ⭐⭐⭐⭐⭐ Exactly what I wanted, a little more than I expected *by S***N on February 28, 2024* Since I play music from my laptop to DAC, when I went from an integrated stereo to dual ZA3s (mono mode) I had to use my laptop's Windows sys tray for volume control - that got old fast. So I bought this passive preamp and it does the job with no fuss. The volume knob is weighty and smooth when adjusting and the device, as a whole, looks and feels much more premium than its price indicates. My intention was to use it temporarily while I saved for a more expensive preamp but I really like this little thing. It's added a little something in a good way to the sound that I can't quite put my finger on but whatever it is I like it. So, for now, it's apart of my base setup that I have no intentions of replacing it in the near future. ## Frequently Bought Together - Nobsound Mini Fully-Balanced/Single-Ended Passive Preamp; Hi-Fi Pre-Amplifier; XLR/RCA Volume Controller for Active Monitor Speakers (Black) - Cable Matters 2-Pack Premium Short XLR to XLR Cables - 3ft, Male to Female Microphone Cable, Oxygen-Free Copper (OFC) Mic Cord, Black - VANDESAIL XLR Cables, 3ft 2 Pack Microphone Cable, XLR Male to Female Balanced Microphone Cord 3 pin, 3 Foot Short mic Cord Oxygen-Free Copper (OFC) Nylon Braided --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/37158569-mini-fully-balanced-single-ended-passive-preamp-hi-fi-pre](https://www.desertcart.pt/products/37158569-mini-fully-balanced-single-ended-passive-preamp-hi-fi-pre) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-23*