| AOR | ABF-125 VHF Air Band RF Filter DISCONTINUED |
ABF-128 VHF Air Band RF Filter  |
|
| Gap | Hear-It In-line Module |
| Kenwood | SP-31 Speaker with Audio Filters |
| MFJ | MFJ-616 Speech Intelligibility Filter |
| MFJ-722 SSB/CW Audio Notch Filter | |
| MFJ-752C Audio Filter | |
| MFJ-784B DSP Audio Filter | |
| MFJ-781 DSP Multimode Audio Filter | |
| NCS | 3230 Multi-Receiver Console |
| Par | BCST-HPF Shortwave Listener RF Filter |
| BCST-LPF Longwave Listener RF Filter | |
| VHF-FM Scanner Listener RF Filter | |
| VHFSYM152HT Scanner Intermod Filter | |
| Timewave | ANC-4 RF Noise Canceller |
| DSP-599zx DSP Audio Filter | |
| West Mountain | CLR/DSP Audio Filter |
| Please also see | Speakers Speakers with Filtration |
| Ham Accessories TVI Filters | |
| Discontinued Audio Filters |
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