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| Headphone Amps (full-size) Discussion of desktop headphone amps. |
04-03-2008, 08:24 PM
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500+ Head-Fi'er
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Join Date: May 2004
Location: Canton, MI
Posts: 596
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Beckman Tubes
Does anybody know who is the actual manufacturer of the 12AU7 tubes branded as Beckman?
Thanks.
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04-03-2008, 10:49 PM
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Headphoneus Supremus
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Join Date: Apr 2005
Location: Calgary, Alberta
Posts: 1,525
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Many of them are Amperex made
__________________
Source1: EMU 1616M---Monster Cable: Ultra Series THX® 1000 Fiber Optic Digital Interconnect--->Lavry Black DA10 (with Furutech Soundbar FUSE-Rhodium Plated & DIY power cables - Furutech cable + Wattgate 330i+350i)
Source2: 1616M
Headphone: HD600 (Equinox 9ft cable)->GS1000->ATH-CM7TI
Portable: IPOD U2->PSP->sharp MT831
PC speaker: Altec Lansing 6021
AMP1: EarMax Pro EE (-Amperex&Philips 50's D-getter 12at7 or early 50's Valvo T7s or Philips 1953 CV455 or Mullard 1954-1960 square-getter 12at7s or GEC A2900 (Triple Mica) or Telefunken ECC801s or Mullard 12at7 brand Amperex 1957 square getter or Philips 1951 12at7 low noise grade KÜHL Tube + 2* Telefunken 1950's CCa <same batch>)- -Philips 1952-1955 12at7 + 2*Siemens CCa brand Valvo (yellow labels) D getter- )+Nordost Frey interconnect cable
AMP2: EarMax Anniversary (#13, lucky # for Cantonese) (-Amperex bugle boy 12at7 "G clef" France made or Telefunken 1950's ECC801s (platinum grade) or Philips 1952 12at7 platinum grade KÜHL Tube + 2*Telefunken 1960's CCa -match curve,same batch- -Genalex Gold Lion 1959 B739 (KÜHL Tube) or Lorenz 1954 ECC81 + 2*Telefunken 1950's CCa <same batch>- )+Nordost SPM interconnect cable
Previously Owned:
headphone: SONY E888*5->AIWA-553*2->AIWA-557*2->AIWA-741->Bang-Olufsen A8*3->SONY-CD3000->ATH-W1000->SONY-SA3000(with Black Dragon cable)->ATH-A900->AKG K701->ATH-AD2000
source: DZ555->E01->SONY EJ2000->D777*2->D303->D25->D15->SONY D100->Panasonic ST790->iRiver H10->N10->some other MD,CDP players,
|^^^^^^^^ ^^^^^^| ||
|...V. TUBE TRUCK........| ||'|";, ___
|_..._..._______===|=||_|__|...., ]
"(@)'(@)"""''"**|(@)(@)*****''(@)
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04-04-2008, 12:51 AM
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100+ Head-Fi'er
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Join Date: Apr 2006
Posts: 214
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What about the 6080 with the same brand ?
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04-04-2008, 12:57 AM
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Headphoneus Supremus
Señor Stax.
Señor MAXX.
Can Jam '10 Organizer
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Join Date: Jun 2001
Posts: 1,580
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I have a few of those and mine are telefunken. Diamond
in the base. Likely Beckman bought whatever they could from
wherever they could and tested and graded the tubes themselves
for the low noise applications the tubes usually ended up in.
__________________
Proud Singlepower Extreme owner since 7/21/2009
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04-06-2008, 12:38 AM
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500+ Head-Fi'er
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Join Date: May 2004
Location: Canton, MI
Posts: 596
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I received the tubes. The just say Beckman made in USA and some codes.
I installed them in my RP-7 Lite with a thin silicone ring at the level of the top getter. They sound very good even better than the Amperex Bugle Boy I have.
The bass is fast deep and tight. The midrange is sweet and the highs are airy and well defined. The soundstage is pretty good and they have great dynamics.
I bargain for the $40+ I paid for them
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