| 40th Anniversary Edition Reference Preamp | | | |
| Howard | | | |
| LS 17SE | | | |
| LS-1 | hybrid, 20 lbs | | |
| LS-10 | 6 inputs | | |
| LS-15 | line stage, remote, 20 lbs | | |
| LS-16 | 20 lbs | | |
| LS-16 mkII | linestage | | |
| LS-17 | 7 inputs, 13 lbs | | |
| LS-17 SE | | | |
| LS-2 | hybrid, 5 line, direct, 21 lbs | | |
| LS-2 mkII | line stage, balanced outputs | | |
| LS-22 | line stage, bal and se i/o, remote, 26 lbs | | |
| LS-22r | with remote | | |
| LS-25 | remote, 25 lbs | | |
| LS-25 mkII | with remote, bal and se inputs | | |
| LS-26 | 8 inputs, 17 lbs | | |
| LS-28 | | | |
| LS-2b | hybrid, bal in, 30 lbs | | |
| LS-2b mkII | line stage, balanced i/o | | |
| LS-2br | line stage, remote | | |
| LS-2br mkII | line stage, balanced i/o, remote | | |
| LS-2r | stereo hybrid, remote | | |
| LS-2r mkII | bal out, remote, 28 lbs | | |
| LS-5 | line stage, bal i/o, 29 lbs | | |
| LS-5 mkII | line stage, tube, balanced i/o | | |
| LS-5 mkIII | line stage, tube, balanced i/o | | |
| LS-5r | line stage, tube, bal, remote | | |
| LS-7 | line stage | | |
| LS-8 | se inputs and outputs | | |
| LS-8 mkII | 5 se inputs, 25 lbs | | |
| LS25 | | | |
| LS28 / VT80 | | | |
| MCP-33 | phono stage, mc only, | | |
| PH-3 | tube phono, mm-mc input | | |
| PH-3 SE | tube phono, se inputs & otpts | | |
| PH-5 | phono pre, 11 lbs | | |
| PH-7 | phono pre, 15 lbs | | |
| REF 5 SE | | | |
| Ref Phono 2 | phono pre, 27 lbs | | |
| Reference 1 | tube line stage, rem, 35 lbs | | |
| Reference 10 | | | |
| Reference 2 | 11 tubes, 6922, 50 lbs | | |
| Reference 2 mkII | with remote, bal and se inputs | | |
| Reference 3 | remote, 48 lbs | | |
| Reference 5 | 7 inputs, 6H30P, 30 lbs | | |
| Reference 5SE | | | |
| Reference 6 | | | |
| Reference AE | class A triode, 6H30 | | |
| Reference phono | phono stage, se in-out, 28 lbs | | |
| SP - 15 | | | |
| SP-1 | tube pre | | |
| SP-10 | tube, two chassis, 31 lbs | | |
| SP-11 | phono, hybrid | | |
| SP-11 mkII | tube, 2 chassis | | |
| SP-12 | 3 inputs, 9 lbs | | |
| SP-14 | 6 line ins, hybrid, phono, 12 lbs | | |
| SP-15 | tube, 2 chassis | | |
| SP-16 | 6-12ax7, 18 lbs | | |
| SP-16L | 12AX7EH, 13 lbs | | |
| SP-17 | 6 inputs, phono, 13 lbs | | |
| SP-17L | linestage, 13 lbs | | |
| SP-1a | tube | | |
| SP-2 | 12ax7 x 10 | | |
| SP-20 | | | |
| SP-3 | tube | | |
| SP-3a | tube | | |
| SP-3a-1 | tube | | |
| SP-3b | tube pre | | |
| SP-3c | updated sp-3 | | |
| SP-6 | tube pre | | |
| SP-6a | tube, with phono | | |
| SP-6b | tube, with phono | | |
| SP-6c | tube, with phono, 30 lbs | | |
| SP-6c1 | | | |
| SP-6f | tube pre | | |
| SP-8 | tube, with phono, 22 lbs | | |
| SP-9 | hybrid tube, phono, 15lbs | | |
| SP-9 mkII | hybrid tube, phono, 15 lbs | | |
| SP-9 mkIII | hybrid tube, phono, 16 lbs | | |
| SP-9r mkIII | hybrid tube, phono, remore | | |
| SP6B | | | |
