2026 Upgraded RO03 Mic Preamp, 120db EIN Ultral Low Noise Booster, for Dynamic & Condenser & Ribbon Microphone & Instrument, XLR/TRS Line Out, Type C Powered,with Build in 48V

The sound on this preamp is incredibly clean. I use it to power a 6-outlet Whirlwind mult-box connection for news conferences, and it gave me the good sound I wanted even with a 100' cable run. Does the job. The cord on the power supply is too short, only about 4'.

I bought this To amplify my Sennheiser Microphones which I use with Dragon NaturallySpeaking for speech recognition. It is very solidly built and provides clean amplification. I changed out the power supply for third-party power supplies that I use with all of my audio equipment to make sure that there's no noise. The sound is very clear which is necessary for speech recognition. However, it does not provide any additional warmth like the ART preamps that I use for voice recording but it's about one third the price of those units. while the sound is a little dry, it doesn't sound unnatural on my zoom calls. I can't comment on singing are instrumental application since I don't do that.

My initial impression was that the unit was well made. It's heavy, in a sturdy metal enclosure, and the switches and ports seem to be of high quality. I am using it in conjunction with a Fostex cassette 4-track, and I had some technical hook-up questions. My email was answered within a few hours, and the customer service rep was incredibly helpful. We exchanged a few emails until an optimum solution was suggested. The preamp works perfectly, and in fact even makes a very low end mic work/sound great. I am 100% satisfied with my purchase and would happily buy more products from this manufacturer.

I was interested in trying this because it offers a lot of clean gain (75 dB) for the price, which I thought might be useful for low-output ribbon & dynamic mics. I did a little a/b test comparing the Rodyweil to the built-in preamps of a Yamaha mixer -- the Rodyweil definitely has a LOT more clean gain, which is nice and useful. I tried it with an SM57 and an sE ribbon microphone and it's loud enough for both, without needing something like a cloudlifter. I also tried the line input, and also a condenser mic with the phantom power button engaged, and both worked fine. My only complaints are (like others mentioned) the unbalanced mini jack outputs, which are a pain -- 1/4" would be a lot more useful. Also, when I tried turning the gain knob up and down, most of the action seems to happen towards the very end of the control's travel -- it's fairly quiet quiet quiet and then at the end gets REALLY LOUD, rather than a smooth transition. Also: the little spec sheet that comes in the box describes this as a "2-channel" preamp, which AFAIK usually means a stereo unit, or something with two separate inputs & outputs. This is a mono, single-channel preamp. It does have separate XLR and 1/4" inputs, and you can run a mic and a line signal through both inputs at the same time, but you've got just the one output. For the price, though, I think it's pretty good, and I'm planning on using it on various recording projects.

usable but still a bit on the noisy side.... Also, had to clean the contacts for the TRS connections. Short on the gain level.

I had to dig through a lot of junk in my shed to find my dusty ol' mic. It has a filter to keep popping and other noises you don't really want down to a minimum. I hooked up my amp to this preamplifier and voila! Gain was the first thing I noticed. No feedback, but significantly louder mic output. I love that, I usually have issues with feedback and organizing distances of my equipment to deter that. My voice came through cleaner than I had imagined. This preamp is compact as well, I could fit it in my pocket, but not with jeans on. Overall, this preamp is very nice and beneficial in many applications of use, I highly recommend getting one!

Works

Sounded like it was picking up radio waves. Tried new cables, and different plugs, but nothing helped.

As my headline suggests, there is not a lot to be said about a device as simple as this. Is your microphone output too low? Simply plug this in, connect your microphone to it and connect this to whatever you are using and "pump up the volume!" :) Also if your mic needs "Phantom power" it can provide it. Nuff said!

Behringer : l’innovation audio accessible à tous Depuis des années, Behringer s’est imposé comme un acteur incontournable dans l’univers du son. La marque a bâti sa réputation sur un principe simple : offrir des produits audio performants, robustes et abordables, capables de satisfaire aussi bien les musiciens débutants que les professionnels exigeants. Une qualité sonore maîtrisée Les équipements Behringer — tables de mixage, interfaces audio, enceintes, micros ou processeurs d’effets — sont conçus pour délivrer un son clair, précis et équilibré. - Les préamplis offrent un signal propre et dynamique. - Les convertisseurs numériques assurent une restitution fidèle. - Les effets intégrés sont réputés pour leur polyvalence et leur musicalité. Cette constance permet aux utilisateurs de travailler, enregistrer ou jouer en live avec une fiabilité remarquable. Une conception robuste et durable Behringer mise sur des matériaux solides et une construction pensée pour résister à l’usage intensif. Les boutons, faders et connectiques sont renforcés, et les boîtiers sont conçus pour supporter les déplacements fréquents. On sent que chaque produit est pensé pour durer, même dans un environnement professionnel. Une marque tournée vers l’innovation Behringer se distingue par sa capacité à intégrer des technologies avancées tout en maintenant des prix accessibles. On retrouve souvent : - Des fonctionnalités inspirées de modèles haut de gamme - Des mises à jour régulières - Une compatibilité étendue avec les logiciels et équipements modernes Cette approche permet à un large public d’accéder à des outils performants sans compromis. Un rapport qualité‑prix difficile à battre C’est l’un des points forts de Behringer : proposer des produits fiables, complets et efficaces à des tarifs très compétitifs. Que ce soit pour un home‑studio, un setup live ou une installation audio, la marque offre une solution adaptée à chaque besoin.

Fantastic product! Works great and super easy to use. Just a no frills preamp with a nice and low noise floor, my signal always sounds great. I do think it works best with microphones though, for instruments, I like more coloration from less transparent preamps.

Rodyweil Microphone Preamp Mic Gain Booster with 2 Input Max 75db Gain 48V Phantom Power XLR Output for Dynamic and Condenser Mic i bought this to see if this will put some gain into my passive cardioid mics... it works and provides ample gain for sure. However i found this to have a bit too much noise in the path. An audible hiss. I went back to my inline phantompowered mic preamp instead which is very quiet. I will say if you needed something like this for inst or mic inputs, it does do the job OK but be aware of the noise you will introduce.

This is really gain lots for the microphone. It's really good build. but if you want to connect to the mic out on the back, it's a 6.5mm jack. if you have a 3.5mm jack, use the adapter. Good service. Thanks the delivery, and Rodyweil.