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| Preamplifiers | | Manufacturer | Model# | Model Year | | Channels | Weight | Details | | | Blue Circle Audio | SBT | 2008 | | - | 15 LBS | 5 INPUTS, 15 LBS | - |
| Blue Circle Audio | BC-301 FY | 2008 | | - | 15 LBS | 5 INPUTS, 15 LBS | - |
| Blue Circle Audio | BC-303 | 2008 | | - | 95 LBS | 3 INPUTS, 95 LBS | - |
| Blue Circle Audio | BC-3 PLS BAL | 2008 | | - | 35 LBS | 3 INPUTS, 35 LBS | - |
| Blue Circle Audio | BC-3 PLS SE | 2008 | | - | 35 LBS | 5 INPUTS, 35 LBS | - |
| Blue Circle Audio | BC-709 | 2008 | | - | 8 LBS | PHONO PRE, 8 LBS | - |
| Blue Circle Audio | BC-703 | 2008 | | - | 35 LBS | PHONO PRE, MM-MC, 35 LBS | - |
| Blue Circle Audio | BC-707 | 2008 | | - | 10 LBS | PHONO PRE, 10 LBS | - |
| Blue Circle Audio | FON LO THINGEE | 2008 | | - | 2 LBS | PHONO PRE, 2 LBS | - |
| Blue Circle Audio | SBP | 2008 | | - | 10 LBS | 5 INPUTS, 10 LBS | - |
| Blue Circle Audio | BC-3000 MKII SE | 2008 | | - | 55 LBS | 5 INPUTS, 55 LBS | - |
| Blue Circle Audio | BC-109 | 2008 | | - | 25 LBS | 5 INPUTS, MM, 25 LBS | - |
| Blue Circle Audio | BC-109-CP1 | 2008 | | - | 28 LBS | 5 INPUTS, MM, 28 LBS | - |
| Blue Circle Audio | BC-3000 MKII | 2003 | | - | - | TUBE, 2 CHASSIS | - |
| Blue Circle Audio | BC-27PI | 2003 | | - | - | SEPARATE PWR SUPP | - |
| Blue Circle Audio | BC-103 | 2003 | | - | - | LINESTAGE, DUAL MONO | - |
| Blue Circle Audio | BC-27 | 2003 | | - | - | PHONO STAGE | - |
| Blue Circle Audio | BC-21.1 | 2003 | | - | 25 LBS | LINESTAGE, 6922, 25 LBS | - |
| Blue Circle Audio | MUSIC PURSE | 2002 | | - | - | LINESTAGE, IN PURSE | - |
| Blue Circle Audio | CS PRE | 2002 | | - | 10 LBS | 3 GOLD INPUTS, 10 LBS | - |
| Blue Circle Audio | AG-3000 | 2002 | | - | 22 LBS | PRE 22 LBS, PWR SUPP 35 LBS | - |
| Blue Circle Audio | BC-9 | 2002 | | - | - | DUAL MONO, BAL, 6922 | - |
| Blue Circle Audio | BC-25 | 2002 | | - | - | LINESTAGE, BAL | - |
| Blue Circle Audio | BC-3 GALATEA | 2000 | | - | 35 LBS | CLASS A TRIODE, DUAL MONO, 35 LBS | - |
| Blue Circle Audio | BC-23 | 2000 | | - | - | PHONO STAGE | - |
| Blue Circle Audio | BC-21 | 2000 | | - | 15 LBS | LINESTAGE, 6SN7, 15 LBS | - |
| Blue Circle Audio | BC-3000 | 1998 | | - | - | TUBE, 2 CHASSIS | - |
| Blue Circle Audio | BC-3 DESPINA | 1995 | | - | - | 2 CHASSIS, DUAL MONO, 6922 | - |
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