tube amps
04-04-2006, 11:01 AM
#1
tube amps
who make them?
i see
Butler Audio - TUBE DRIVER BLUE
Vacuum Tube Amplifiers
TUBE DRIVER BLUE produces the best Vacuum Tube audio with a completely open-ended design (ZERO global degenerative negative feedback). Also Tube Driver BLUE eliminates one of the most problematic components that plagues virtually all other vacuum tube amplifier designs: the Output Transformer.
Coupled with novel output load mirroring circuitry, hand-selected dual triode tubes operate in a safe, near plate-saturated mode continuously. Therefore, Tube Drive BLUE creates the ideal electrical environment for classic vacuum tube characteristics.
SPECS
Power @ 4ohms, 14V 2 x 150Watts RMS, Both channels driven (TRUE Power)
1 x 500Watts RMS, Mono (Bridged)
Driver Tubes 6SL7GT x 2 Dual Triodes, Hand Selected
Tube Heaters DC, Fully Regulated, Delayed Soft Start
Output Devices 12 x 15Amps, Sanken (Audiophile grade)
Cooling Massive Internal/External Heat Exchanger with quiet, Temperature-controlled Fan
Heat Exchanger 400% Oversized (Compared to original model 1500)
Frequency Response 5Hz - 100Khz (+/- 1 dB)
Idling Current 2.4 Amps
THD (Distortion) Less than 0.15% (30Khz Bandwidth, Unweighted)
S/N Ratio Better than 110dB (A-weighted)
Negative Feedback ZERO, no global negative degenerative F/B loop (Open-Ended Design)
Tonality Musical, Warm & Dynamic (Rivals 'All Tube', home audiophile amps)
Dimensions 10.2" x 17.3" x 2.4"
Weight 12 Lbs.
Color Frosted Platinum
Tube Illumination Internal BLUE LEDs (Trademark and Patent Pending)
and
Milbert Bam amps
All-Tube Car Amp, the most musical car amp
Introducing the new BaM-235ab with significant advancements including Auto-Bias. [more] [purchase]
BaM-235ab Mobile Vacuum Tube Amplifier
World's only all-tube car amp handmade in USA since 1986.
Evolutionary new model, now with automatic plasma bias
20 year proven track record; 10+ year tube lifetimes
Patented designs, impervious to microphonic noise from vibration
100% all tube signal path, 35wpc, class A input stages
Designed by ear to sound good, not encumbered by any target budget
Built by hand in the USA with premium craftsmanship and components.
High-end home audio pedigree; a true top-quality tube amp, adapted for the car
Numerous glowing reviews over decades from respected high-end magazines and journals
June 2005 Robb Report magazine: "Milbert is most certainly the Holy Grail of autosound"
Adjustable feedback and grounding; overcurrent/heat limit and low voltage lockout
Proper, controlled tube heaters and voltages; soft-start power maximizes longevity
Tightly coupled, multi-stage regulation of all internal energy storage
Supersonically recharged 100+ joule (watt-second), bottomless energy reserves
Graceful overloading, does not hard clip but smoothly rolls if overdriven
Top quality parts throughout; Teflon wire, Kimber Kable, 'above milspec' circuitboard: thicker, fatter, better
Well made: machined aircraft aluminum, silver/ceramic sockets, stainless hardware and fittings that don't strip out
Adjustable speaker output impedances: 16ohms, 8ohms, 4ohms, 2ohms, half-ohm, custom magnetics
Unconditionally stable, sustains direct shorts without damage
Full Details: Facts, Specs, FAQ, Price, etc.
“ ... this unit sounds so good ... I was in tears. ” --Robert Reina, Soundslike magazine
i see
Butler Audio - TUBE DRIVER BLUE
Vacuum Tube Amplifiers
TUBE DRIVER BLUE produces the best Vacuum Tube audio with a completely open-ended design (ZERO global degenerative negative feedback). Also Tube Driver BLUE eliminates one of the most problematic components that plagues virtually all other vacuum tube amplifier designs: the Output Transformer.
Coupled with novel output load mirroring circuitry, hand-selected dual triode tubes operate in a safe, near plate-saturated mode continuously. Therefore, Tube Drive BLUE creates the ideal electrical environment for classic vacuum tube characteristics.
SPECS
Power @ 4ohms, 14V 2 x 150Watts RMS, Both channels driven (TRUE Power)
1 x 500Watts RMS, Mono (Bridged)
Driver Tubes 6SL7GT x 2 Dual Triodes, Hand Selected
Tube Heaters DC, Fully Regulated, Delayed Soft Start
Output Devices 12 x 15Amps, Sanken (Audiophile grade)
Cooling Massive Internal/External Heat Exchanger with quiet, Temperature-controlled Fan
Heat Exchanger 400% Oversized (Compared to original model 1500)
Frequency Response 5Hz - 100Khz (+/- 1 dB)
Idling Current 2.4 Amps
THD (Distortion) Less than 0.15% (30Khz Bandwidth, Unweighted)
S/N Ratio Better than 110dB (A-weighted)
Negative Feedback ZERO, no global negative degenerative F/B loop (Open-Ended Design)
Tonality Musical, Warm & Dynamic (Rivals 'All Tube', home audiophile amps)
Dimensions 10.2" x 17.3" x 2.4"
Weight 12 Lbs.
Color Frosted Platinum
Tube Illumination Internal BLUE LEDs (Trademark and Patent Pending)
and
Milbert Bam amps
All-Tube Car Amp, the most musical car amp
Introducing the new BaM-235ab with significant advancements including Auto-Bias. [more] [purchase]
BaM-235ab Mobile Vacuum Tube Amplifier
World's only all-tube car amp handmade in USA since 1986.
Evolutionary new model, now with automatic plasma bias
20 year proven track record; 10+ year tube lifetimes
Patented designs, impervious to microphonic noise from vibration
100% all tube signal path, 35wpc, class A input stages
Designed by ear to sound good, not encumbered by any target budget
Built by hand in the USA with premium craftsmanship and components.
High-end home audio pedigree; a true top-quality tube amp, adapted for the car
Numerous glowing reviews over decades from respected high-end magazines and journals
June 2005 Robb Report magazine: "Milbert is most certainly the Holy Grail of autosound"
Adjustable feedback and grounding; overcurrent/heat limit and low voltage lockout
Proper, controlled tube heaters and voltages; soft-start power maximizes longevity
Tightly coupled, multi-stage regulation of all internal energy storage
Supersonically recharged 100+ joule (watt-second), bottomless energy reserves
Graceful overloading, does not hard clip but smoothly rolls if overdriven
Top quality parts throughout; Teflon wire, Kimber Kable, 'above milspec' circuitboard: thicker, fatter, better
Well made: machined aircraft aluminum, silver/ceramic sockets, stainless hardware and fittings that don't strip out
Adjustable speaker output impedances: 16ohms, 8ohms, 4ohms, 2ohms, half-ohm, custom magnetics
Unconditionally stable, sustains direct shorts without damage
Full Details: Facts, Specs, FAQ, Price, etc.
“ ... this unit sounds so good ... I was in tears. ” --Robert Reina, Soundslike magazine
04-04-2006, 11:38 AM
#2
500 Watt CAFz'r
Join Date: Mar 2005
Posts: 884
^ The Tube Driver Blue is a "hybrid amp"........ not true tube outputs.
The Milbert reviews above (Soundslike Mag) was actually done with the David Berning design ones not their new BAM-235ab with all the new changes.
Other High-end Vacuum Tube Amps...
- TRU C-7.2AT all tube amp. @13 watts/channel with EL-84
- HSS Class A tube amp @30 watts /channel with KT-88 for the outputs..... very sweet!
The Milbert reviews above (Soundslike Mag) was actually done with the David Berning design ones not their new BAM-235ab with all the new changes.
Other High-end Vacuum Tube Amps...
- TRU C-7.2AT all tube amp. @13 watts/channel with EL-84
- HSS Class A tube amp @30 watts /channel with KT-88 for the outputs..... very sweet!
Last edited by SweetnLow91SC; 04-04-2006 at 11:44 AM.
04-04-2006, 03:47 PM
#4
Originally Posted by SweetnLow91SC
^ The Tube Driver Blue is a "hybrid amp"........ not true tube outputs.
The Milbert reviews above (Soundslike Mag) was actually done with the David Berning design ones not their new BAM-235ab with all the new changes.
Other High-end Vacuum Tube Amps...
- TRU C-7.2AT all tube amp. @13 watts/channel with EL-84
- HSS Class A tube amp @30 watts /channel with KT-88 for the outputs..... very sweet!
The Milbert reviews above (Soundslike Mag) was actually done with the David Berning design ones not their new BAM-235ab with all the new changes.
Other High-end Vacuum Tube Amps...
- TRU C-7.2AT all tube amp. @13 watts/channel with EL-84
- HSS Class A tube amp @30 watts /channel with KT-88 for the outputs..... very sweet!
04-17-2006, 11:50 AM
#9
500 Watt CAFz'r
Join Date: Mar 2005
Posts: 884
^ That's where I listened to the TRU Hybrid & the To3 amplifiers. It was one of the best sounding set up on a display/demo so far in the lower mainland....... 
TRU all tube amp's internals pic...
Originally posted by zzzzzzz: someone pls
Last edited by SweetnLow91SC; 04-17-2006 at 02:33 PM.
