--- product_id: 86201157 title: "MFJ Enterprises MFJ-784B Tunable DSP Filter" brand: "mfj" price: "60 zł" currency: PLN in_stock: false reviews_count: 3 url: https://www.desertcart.pl/products/86201157-mfj-enterprises-mfj-784b-tunable-dsp-filter store_origin: PL region: Poland --- # Bandwidth Range: 30-2100 Hz Noise Reduction: 20 dB Tunable Frequency: 300-3400 Hz MFJ Enterprises MFJ-784B Tunable DSP Filter **Brand:** mfj **Price:** 60 zł **Availability:** ❌ Out of Stock ## Summary > 🎶 Tune In, Zone Out: Elevate Your Audio Game! ## Quick Answers - **What is this?** MFJ Enterprises MFJ-784B Tunable DSP Filter by mfj - **How much does it cost?** 60 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/86201157-mfj-enterprises-mfj-784b-tunable-dsp-filter) ## Best For - mfj enthusiasts ## Why This Product - Trusted mfj brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **🔧 Precision Tuning:** Customize your audio experience with a wide frequency range. - • **📊 15 Pre-set Filters:** Choose from a variety of factory settings or create your own. - • **🔒 Programmable Settings:** Save your preferred configurations for quick access. - • **🚀 Advanced Noise Reduction:** Experience crystal-clear signals with minimal interference. - • **⚙️ Dual Filter Functionality:** Utilize two filters simultaneously for enhanced clarity. ## Overview The MFJ Enterprises MFJ-784B Tunable DSP Filter is a state-of-the-art audio filter designed for professionals seeking precision and clarity. With a tunable frequency range from 300 to 3400 Hz and adjustable bandwidth from 30 Hz to 2100 Hz, this filter allows users to eliminate unwanted noise and enhance signal quality. Featuring 15 pre-set filters and the ability to program custom settings, it caters to various modes including SSB, AM, and RTTY. The advanced LMS algorithm ensures a noise reduction of 20 dB, making it an essential tool for any serious audio technician. ## Description MFJs tunable super DSP filter automatically eliminates heterodyne, reduces noise and interference simultaneously on SSB, AM, CW, packet, AMTOR, PACTOR, RTTY, SSTV, WeFAX, FAX, weak signal VHF, EME, satellite -- nearly any mode. You get MFJs tunable FIR linear phase filters that minimize ringing, prevent data errors and have "brick wall" filter response with up to 57 dB attenuation 75 Hz away. Only MFJ gives you 5 tunable DSP filters. You can tune each lowpass, highpass, notch, and bandpass filter including optimized SSB and CW filters. You can vary the bandwidth to eliminate interference. Only MFJ gives you 5 factory pre-set filters and 10 programmable pre-set filters that you can customize. Instantly remove QRM with the turn of a switch! You get MFJs automatic notch that finds and eliminates multiple heterodyne. You get MFJs adaptive noise reduction. It silences background noise and QRN so much that SSB sound like local FM. The automatic notch and adaptive noise reduction can be used with all relevant tunable pre-set filters. Automatic gain control (AGC) keeps audio level constant during signal fade. Automatic notch filter MFJs automatic notch filter searches for and eliminates multiple heterodyne in milliseconds. Its so fast, that even interfering CW and RTTY signals are eliminates. With up to 50 dB attenuation, youll copy stations otherwise masked by heterodyne. Voice signals arent degraded because the notch is extremely narrow. Turn on automatic notch and youll never hear unwanted heterodyne or tuner-uppers. You can selectively remove unwanted tones using the two manually tunable notch filters -- an MFJ exclusive. Knock out unwanted CW stations while youre on CW. Adaptive noise Reduction Noise reduction silences background noise, reduces fatigue and makes signals readable. Noise reduction works in all filter modes and on all random noise -- white noise, static, impulse, ignition noise, power line noise, hiss. ## Features - You can tune the center frequency from 300 to 3400 Hz, and vary the bandwidth from 30 Hz to 2100 Hz -- from super-tight CW filters to wide razor-sharp Data filters. As you reduce bandwidth, interfering signals disappear -- theyre down 47dB, 60 Hz away. These linear phase filters dont distort signals with unequal time relays -- even the narrowest 30 Hz bandwidth doesnt ring. - One position gives you two tunable filters you can use together. For example, tune one to mark, one to space and set the bandwidth tight for an incredibly sharp RTTY filters. 15 pre-set filters -- factory set or you program. - You can select from 15 pre-set filters. Use SSB, AM, CW, packet, AMTOR, PACOTR, RTTY, SSTV, WeFAX, FAX or any mode. If you dont like our preset filters, you can program your own -- an MFJ exclusive! Save center frequency/bandwidth, lowpass/highpass cutoffs, auto/manual notch, noise reduction -- all filters setting -- in 10 programmable filters. - "Slice-off" overlapping SSB signals, hum, pulses, rasp and other low frequency noises. Tunable bandpass filters Narrow band signals like CW and RTTY jump out of QRM when you switch in MFJs exclusive tunable FIR bandpass filters. - The LMS algorithm reduces noise by 20 dB and is adjustable to prevent distortion. Tunable highpass/lowpass filters For voice and data, nothing beats MFJs exclusive tunable highpass/lowpass FIR linear phase "brick wall" filters. ## Technical Specifications | Specification | Value | |---------------|-------| | Item Package Dimensions L x W x H | 15.9 x 10 x 5.1 inches | | Package Weight | 3.7 Pounds | | Brand Name | MFJ | | Country of Origin | United States | | Manufacturer | MFJ Enterpises | | Part Number | MFJ-784B | ## Product Details - **Brand:** MFJ - **Special Feature:** Noise Reduction - **Water Resistance Level:** Water Resistant - **Manufacturer:** MFJ Enterpises - **UPC:** 702646178722 ## Images ![MFJ Enterprises MFJ-784B Tunable DSP Filter - Image 1](https://m.media-amazon.com/images/I/41T8b8hGN2L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars I am a amateur radio operator and this works for me *by J***N on Reviewed in the United States on June 26, 2019* It filters the incoming radio in m y headphones does a good job of filtering and bring the signal up louder. ### ⭐⭐ 2.0 out of 5 stars I could not make it work so I have to ... *by P***O on Reviewed in the United States on July 18, 2016* I could not make it work so I have to return it. I think I would have kept it if it worked. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Works wonders for CW *by K***R on Reviewed in the United States on April 2, 2021* This unit does an OK job on SSB, and has lots of adjustments which can be selected, but makes the audio sound a little tinny as some of the lower frequencies are rolled off. Where this unit really shines, is on CW. I use this in conjunction with FLdigi and a simple microphone picking up my speaker outout, and using the waterfall display, I can zero beat a signal and isolate it out completely. So 3 stars for SSB, 5 stars for CW. --- ## 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.pl/products/86201157-mfj-enterprises-mfj-784b-tunable-dsp-filter](https://www.desertcart.pl/products/86201157-mfj-enterprises-mfj-784b-tunable-dsp-filter) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-24*