Review Category: Filters, Audio: (DSP and others)
| Product Name | # Reviews | Last Review | MSRP $ | Avg Rating |
|---|---|---|---|---|
| AOR TDF-370 MultiModeTerminal | 1 | 2001-08-22 | 329.95 | (3) |
| Autek Research QF-1 | 15 | 2019-08-24 | 79.95 | (4.3) |
| Autek Research QF-1A | 35 | 2023-07-25 | No longer in production | (4.9) |
| BHI ANEM - Amplified Noise Elimination Module | 16 | 2020-07-03 | 227 | (4.6) |
| BHI Compact-In-Line | 13 | 2024-08-08 | 259.00 | (4.8) |
| BHI Dual In-Line Noise Cancelling Unit | 3 | 2023-09-03 | 190 Euro | (4.7) |
| BHI NEDSP 1061 | 29 | 2019-07-02 | 139.00 | (4.9) |
| BHI NEDSP-1062 | 11 | 2020-10-09 | 159.99 | (5) |
| bhi NEIM1031 | 17 | 2019-11-03 | £129.95 | (4.4) |
| BHI NES 10-2 MK3. | 14 | 2024-08-17 | CIRCA £100.00 | (3.9) |
| bhi ParaPro EQ20-DSP | 7 | 2024-02-22 | $379.99 | (3.4) |
| Blue DSP by IW2NDH | 2 | 2023-08-30 | 75 Euro | (4.5) |
| ClearSpeech base unit | 32 | 2022-03-20 | 179.95 | (4.7) |
| Datong FL-2 | 8 | 2015-08-10 | ?? | (4.6) |
| Datong FL1 | 4 | 2004-10-15 | (4.8) | |
| Datong FL3 | 20 | 2022-11-03 | £64.95 (GBP) | (5) |
| Easy Audio Bandpass Filter Pacific Antenna | 1 | 2023-01-11 | 25 | (5) |
| ED88 NF-ASP Dierking | 3 | 2009-12-19 | 240 (about) = Euro 200 | (3.7) |
| Elecraft AF1 Active Filter with Audio Amplifier | 6 | 2015-09-06 | $59.95 | (5) |
| Elecraft KDSP2 for the K2 Transceiver | 4 | 2015-07-06 | 219.00 | (3.5) |
| FUNtronics ADSP Filter FDS-02 | 5 | 2023-01-26 | 85.00 | (3) |
| GAP HEAR IT Inline Module | 26 | 2021-06-16 | 180 | (4.5) |
| Gap Hear It Module inline DSP filter | 11 | 2022-12-02 | 200 | (4.6) |
| Heathkit HD-1418 | 6 | 2019-01-19 | 79.95 | (4.8) |
| HiPermite | 13 | 2018-08-26 | 19 | (5) |
| Idiom Press/Ham Supply SCAF-1 | 93 | 2019-02-22 | 108.95 kit 148.95 assembled | (4.7) |
| J-Com Magic Notch | 2 | 2016-10-28 | (5) | |
| JPS NF-60 DSP Notch Filter | 5 | 2008-03-14 | (5) | |
| JPS NIR-10 | 13 | 2014-08-30 | 299.95 | (4.5) |
| JPS NIR-12 Dual DSP | 16 | 2021-01-03 | 375.00 | (4.8) |
| JPS NRF-7 | 4 | 2015-06-01 | 199.95 | (5) |
| JPS NTR-1 | 1 | 2021-08-24 | 160 USD | (5) |
| Kenwood DSP-100 | 13 | 2017-03-24 | $500-$600 | (4.2) |
| LINGUA | 7 | 2016-12-20 | 290.00 | (4.6) |
| MFJ-720 Deluxe Super CW Filter | 1 | 2021-11-09 | $44.95 in 1981 | (5) |
| MFJ-721 | 3 | 2010-07-19 | 79.95 | (5) |
| MFJ-722 | 1 | 2004-03-18 | 79.95 | (4) |
| MFJ-722B | 2 | 2014-08-09 | 99.95 | (4.5) |
| MFJ-784B | 33 | 2019-06-03 | 249.95 | (4.3) |
| Michels Engineering Speech Extractor DX-21 | 1 | 2005-10-08 | 350 | (5) |
| Midnight Science CW Regen Filter (AKA The Scrubber) | 4 | 2021-04-16 | 70 | (5) |
| Mizuho AP-1D Audio Processor | 1 | 2003-04-22 | 99.50 in 1983 | (5) |
| Mizuho AP-M1 portable audio processor | 1 | 2007-06-23 | (5) | |
| MSC | 3 | 2018-06-08 | 195. | (4.7) |
| NEScaf Audio Filter | 33 | 2014-07-17 | 29.00 | (4.9) |
| NOBLE RADIO DRAKE R4C FILTERS | 2 | 2023-03-09 | $ 50 to $70 USD | (5) |
| Radio Shack DSP 40 | 40 | 2019-04-29 | 39.95 | (3.5) |
| SGC "Power Clear" Add-on-DSP | 2 | 2013-08-06 | 159.95 | (3) |
| Signal Enhancer II, Model: MFJ-752D | 3 | 2015-08-21 | 129.99 | (3.3) |
| SotaBeams DSP Filter | 2 | 2020-02-12 | 75 | (5) |
| SOTABEAMS LASERBEAM Vari Audio DSP Filter | 1 | 2020-05-02 | 46.83 Outside UK - 56.20 VAT | (5) |
| SuperSCAF by AFTRONICS | 1 | 2018-12-16 | unknown | (5) |
| Timewave DSP-59+ | 15 | 2019-05-07 | 249.99 | (4.5) |
| Timewave DSP-599zx | 39 | 2023-03-27 | 399 | (4.5) |
| Timewave DSP-59Y | 11 | 2008-12-03 | 329.95 | (4.8) |
| Timewave DSP-9 | 20 | 2013-08-05 | 219.99 c.1995 | (4.9) |
| Timewave DSP-9+ | 22 | 2024-06-22 | 199.55 | (4.7) |
| Vectronics VEC-820 CW Filter Kit | 8 | 2020-03-20 | 35 | (3.8) |
| Vectronics VEC-841 Tunable CW/SSB Audio Filter | 4 | 2012-12-13 | 69.96 | (4.8) |
| Vectronics VEC-884 | 2 | 2016-05-24 | 249.95 | (4.5) |
| W3NQN Passive Audio Filter | 37 | 2018-07-12 | 70 USD $75 Cdn $90. overseas | (4.9) |
| W4RT Gap Hear-It DSP (bhi) for Yeasu 817 | 24 | 2014-01-28 | 179.00 installed, 149.00 module | (5) |
| W9GR DSP Filter | 16 | 2023-04-29 | 170.00 | (4.8) |
| West Mountain Radio CLRdsp | 42 | 2024-02-06 | 219.95 | (4.4) |
| Wouxun Audio Filter | 1 | 2014-03-28 | 59.95 | (5) |
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MSC
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