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HIWATT World Register

Biacrown Amps

(S/N 15xxx+)

Last updated April 21, 2010

 

Note: Several Hylight labels were used on amps made after Dave Reeve's death in March of 1981,
most likely until they used up the ones they had on hand.

S/N Model Notes Loc.
15266DR103 Hylight 2-input Tested sticker date 5/6/81, PartridgesCH
15267DR504 Hylight 2-input, toggles, Partridges, factory IEC, black sel. rings, fuse holders and one output jack replaced, cab. roughHR
15268DR103 Hylight 2-input UK
15294DR103 Hylight 2-input Custom Hiwatt 50US
15297DR504 Hylight 2-input, Partridges, 120V hard-wire, Tested 22/6/81, factory IEC, squeaky clean US
15303DR103 Hylight 2-input, PC boards, Partridge transformers TH7545/4,H9682P, TH7549/2, H9683, made for Canada US
15353DR103 Hylight 2-input, pc boards, Partridge transformers, made for canada.US
15367DR504 Hylight 2-input, Partridges, PCB & inside can caps, typical Canadian voltage selector neutering, not currently working.CA
15375DR103 Hylight 2-input, togglesCA
15379DR103 Hylight 2-inputDE
15386DR504 Hylight 2-input, all original save for the output tubes ,1981 ,no mods whatsoever.CA
15405DR103 Hylight 2-input CN
15405DR103 Hylight 2-input, PCB, Canadian mains mod, Partridges, straight heat shield, toggles, very cleanCN
15421DR103 Hylight 2-input Modified to include a 1980s DOD Compressor, strangely.CA
15424DR504 Biacrown 2-input, toggle sw, Partridges w/end bells, slave out, white jacks, stickerUS
15469DR103 Biacrown 2-input SE
15532DR201 6-EL34 Biacrown 2-input, 1982 QC StickerDE
15558DR201 6-EL34 Biacrown 2-input, non_Partridge??
15559DR103 Biacrown 2-input, toggle sw, non-PartridgeUS
15563DR103 Biacrown 2-input, toggle sw, non-Partridge, Canadian import mods and stickerCA
15563DR103 Biacrown 2-input, toggle sw, non-Partridge, Canadian voltage stickers and plates, otherwise all previous owner mods removed and restored to original condition.US
15574DR103 Biacrown 2-input The s/n 6 was overstamped with a 7 ?CA
15576DR103 Biacrown 2-inputCA
15589DR504 Biacrown 2-input, non-Partridge, Canadian mains modCA
15596DR103 Biacrown 2-input, purchased in San Francisco in 1993 or 1994 in non-working condition for a mere $100! De-modded and restored to stock.US
15622DR103 Biacrown 2-input inspection tag dates 14/7/82, non-Partridge, factory IEC, PCBs Green with hiwatt printed on them, toggles. purchased from the U.S. imported to AustraliaAU
15634DR103 Biacrown 2-inputUS
15660DR504 Biacrown 2-input, non-PartridgeUS
15661DR504 Biacrown 2-input Slave Output, Canadian voltage 120v, all original tubes, original ownerCA
15662DR103 Biacrown 2-inputUS
15682SA112 Biacrown 2-input Custom 50, toggles, tested 14/7/82, CA mod, Ontario Hydro sticker, no code or company name on trannies. Has 'Fane' and 'Made in England' embossed on the speaker. CA
15742DR103 Biacrown 2-input, blue PCBs, Ontario Hydro sticker and 115V-only mods, Drake transformers, togglesCA
15820DR504 Biacrown 2-input, toggles, Canadian voltage 115v, bright blue PCBs, inspected 17/11/82, non-Partridge, tin shieldCA
15846SA112 Biacrown 2-input, non-Partridge, bias(?) adjustment addedCA
15908DR103 Biacrown 2-input, PCB, toggles, OL circuit, IEC, added cap(?) on V3 socket, adj. bias mod, non-Partridge transformers.US
15914DR504S Biacrown 2-input Type AP, Harry Joyce name on chassis 8-4-83 also has the name Matt Anderson on chassis, toggle switches for main and standby.US
15925DR504S Biacrown 2-input Very good condition, has the Harry Joyce name on chassis but is not labeled correctly. This particular amp has the regular DR504 circuit, not the 504S switching circuit. It has the normal 2-input control panel and is built with the pots but not the tubes circuit board mounted.US
15925DR504S Biacrown 2-input, PCBs, togglesUS
15926DR504S Biacrown 2-input Found in a pawnshop in Akron,OH. Had it set up to original specs.Harry Joyce name on chassis. Previous owner painted a #2 on it. I consider it a #1US
15932DR504 Biacrown 2-inputCA
15938DR504S Biacrown 2-input, toggle switches, light blue pcb, Harry Joyce name on chassis, non-partridge transformers, sole owner purchased from Allied Music, New Orleans, LA. US 03/14/1984 - still have sales receipt from purchase. US
15938DR504S Biacrown 2-input, blue PCBs, toggles, non-Partridge US
15945SA112 Biacrown 2-input, 50 watt, 19/5/1983 inspection sticker, toggles, non-PartridgeCA
15963OL504 Biacrown 2-input, toggles, no OD control, non-partridge trannysUS
15964SA112OL Biacrown 2-input 50 watt combo, toggles, cast-frame Fane, IEC, perfect condition, cast frame Fane speaker model 122231US
15968SA112OL Biacrown 2-input Tag showed amp as a SA112OL and had factory channel switching between the bright and normal channel. There is a red LED beside the input jacks. It also must have added a gain stage when engaged. Harry Joyce name on chassis. Fane 12 speaker. Shipped with Gold Lion ECC83s and EL34s.US
15985OL103 Biacrown 2-input US
16006OL103 Biacrown 2-inputUS
16015OL504 Biacrown 2-input, 1983, 50w custom, 2 GEC Gold Lion KT77s, Drake transformers, rocker switches, Harry Joyce on chassis. Favorite amp! full-time use/abuse for 15 yrs. NEVER A PROBLEM!us
16024OL504 Biacrown 2-input Custom Lead 50, metal toggles, Svetlana EL34s, strong gain, full rich tone with any guitar, never fails.US
16035SA112 Biacrown 2-input United States
16043DR103 Biacrown 2-input, BiacrownCA
16044DR103 Biacrown 2-input Metal toggles, par for course.US
16060DR504 Biacrown 2-input (used with Hiwatt 4x12)CA
16063DR504 Biacrown 2-input, rockers, Canadian/OntarioHydro 115V mod, very good condition.US
16064DR504 Biacrown 2-input, toggle switches, original caps have 1983 date codes. Drake trannys, PCB. Voltage selector patched over and hardwired to 115V for import to Canada. CA
16093DR504OL Biacrown 2-input, rocker switches, non-PartridgeUS
16112DR504 OL Biacrown 2-input, rocker sw, PCB, non-Partridge, 1983 date codesUS
16145SA112 Biacrown 2-input, 50 watt, PCBUS
16160OL103 Biacrown 2-input, I got this from a good friend about 15 plus years ago. He was from alaska. I have a matching cab but my speakers were stolen.US
16203SA112 OL Biacrown 2-input, 50 watt, 12/1983 inspection sticker, rocker switches, normal control set, originally had Gold Lion KT77 power tubesUS
16216DR504 Biacrown 2-input, OL factory circuit, 1983 date codesUS
16231DR504 Biacrown 2-input, 1983 stockUS
16247OL103 Biacrown 2-input Chassis inspection sticker stamped 7/12/83. Has unusual 4 coupling caps to output tubes. Rocker switches, Drake transformers.US
16260DR504 OL Biacrown 2-input, Rocker Sw, non PartridgeUS
16274DR504 OL Biacrown 2-input, Rocker Sw, non Partridge, PCBUS
16298SA112 OL Biacrown 2-input, 2 Rocker Switches, tranformers unknown, Celestion 12H100 speaker, re-capped by Frank Finkhauser, German Tube-Amp Authority, otherwise all original.DE
16302OL103 Biacrown 2-inputCA
16311OL105 Biacrown 2-input, Overdrive control, Canadian Hydro mods (voltage selector neutered), non-Partridge, appears all originalCA
16312OL103 Biacrown 2-input, overdrive control, CA 115v hard-wired, non-PartridgeUS
16322DR504 Biacrown 2-input, rockers, OL mod, recovered in bright orangeUS
16342DR103 Biacrown 2-input Biacrown 2-input, rocker sw, non-PartridgeKR
16346DR103 Biacrown 2-input Custom Hiwatt 100, 2 input, bass series 100 tag on back in script. Slave output marked 0dbm. Bought new at Akron music center in Akron, OH in August 1985. Using with 2 1-15 cabs front loaded with 200 watt EV-MsUS
16355DR504 Biacrown 2-input, rockers, Canadian Hydro sticker/power mod, very clean, PCB, insp. 10.2.84, non-Partridge, straight tin shieldUS
16367DR103 Biacrown 2-inputCA
16379DR103OL Biacrown 2-input Lead 100, PCB, Overdrive contol, non-Partridge trannys, Came from Nova Scotia, CA.US
16382other Biacrown 2-input Custom Hiwatt 50 Bulldog Model SE112 Type:AP w/Celestion G12-H100, Came with 4 Mullard ECC83s since replaced with 4 Sovtech 12AX7WBs still has original output tubes, Gold Lion KT77s. The tube on the left has a black plastic base an additional number on it 7921 KT77. The pwr.tube on the right has a brown plastic base is numbered 7848Z KT77.This is generally a clean sounding amp that will distort but really needs to be cranked well beyond club playing levels to be fully appreciated. A very dry,rigid sound when plugged straight into the amp, until you turn up the volume and push the power section it begins to open up, really speak. It is an impossibly LOUD 50 watts. I bought this amp new for $325.00 from a guy whose music store was going out of business in the early 1980s. 83-84?, togglesUS
16399DR504 Biacrown 2-input US
16426DR103 Biacrown 2-input, PCB, toggle switches, cap cans date 83-49, transformers unknownUS
16433DR504OL Biacrown 2-input, PCB, non-Partridge, clean, all originalUS
16434DR504OL Biacrown 2-input US
16444DR103 Biacrown 2-input, PCB, Drake(?) transformers, toggles, VG conditionUS
16445DR103 Biacrown 2-input, PT replaced, has effects loopUS
16459DR504 Biacrown 2-input Harry Joyce name on the amps bottom frame, one unknown added jack omn rear panel.CA
16460DR504 Biacrown 2-input Purchased from original owner, who bought it in Ontario around 1984. Non-original KT77 power tubes, but all preamp tubes are original MullardsCA
16478DR103 Biacrown 2-input, PCB, caps in side, no heat shield, non-Partridge, hard-wired to 115v mains, odd diodes added, clean exterior.US
16480DR504 OL Biacrown 2-input, 1984, Harry Joyce on chassis. Came with 4 1974 fane 12 122309 speakers with a date code of 03/74.US
16485DR504 Bicrown 2-input, OL factory circuit, 1984 QC stickerUS
16488DR405 Bicrown 2-input, Partridges, Choke, turrets, IECUS
16496DR103OL Biacrown 2-input, Drakes, Sovtek preamp, Svetlana power tubesUS
16500OL103 Biacrown 2-input, overdrive control, non-Partridge, PT replaced, no heat shieldUS
16512OL103 Biacrown 2-inputSP
16514DR103OL Biacrown 2-input, changed transformer (Drake melt down), replaced with 75watt partridge, made it even more scary! Sovtek preamp, Svetlana power tubesUS
16520OL103 Biacrown 2-inputUS
16525OL103 Biacrown 2-input HIWATT LEAD 100 w/overdrive control, 1/11/84 testUS
16527OL103 Biacrown 2-input HIWATT LEAD 100 w/overdrive control, front logo detached, non-Partridge, no heat shield, has small added tranny 'ED-7' for reverb added (perhaps from factory), control pot on rear panel, extra preamp tube. tested 1/11/84US
16530OL103 Biacrown 2-input, PCB, overdrive control, non-PartridgeUS
16532OL103 Biacrown 2-input, PCB, overdrive control, non-Partridge, chassis dated 8/11/84, Gold Lion KT77sUS
16544SA112 Biacrown 2-input, Type: APNO
16599DR504 Biacrown 2-input, rocker switches, PCB, Drake TransformersUS
16613DR504 Biacrown 2-input, factory OL mod, rocker switches, PCB, Drake Transformers, odd S/N plateUS
16637OL103 Biacrown 2-input HIWATT LEAD 100 w/overdrive controlCA
16477S100 Biacrown 4-input -- 'Maxwatt G/B.'CA
16694SA112 Biacrown 2-input, rocker switches, OL mod, G12H-100 Celestion speaker, serial number plate replaced, unknown custom control added to back panel (NFB?).UK
16697SA112 Biacrown 2-input Rocker switches, two inputs, G12H-100 Celestion speaker, channel switching modUK
AM052SA112 Biacrown 4-input S/N number reads AM0524 and plate says Biacrown, hand wired and partridge trannies.US
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