This is a Butler Audio Tube Driver Model 750, made in the USA by Phaze Audio. It is one of the few (and definitely the best!) tube driven amplifier ever designed for mobile audio. The clarity is amazing. I am selling this amp for the estate of a fellow audiophile, who unfortunately passed away before he could install it in his car; so it's brand new! This sale includes all the documentation I could find (see photo) but not the original factory box, which I couldn't find - but it will be expertly packed! Please understand, because it's tube equipment and no longer in warranty, I have to make this an 'as is' sale.
Nevertheless, it was bench tested by my audio tech, Stephen Sank, who takes care of all my home equipment. It meets all specs and sounds incredible! There are a couple of small marks in the metal case that just come from storage, but nothing serious or too obvious. Please let me know if you have any questions. If you don't know what a Tube Driver amp is, please Google 'Butler Audio' for a lot of very good information.----------------------------------------------------------------------------------- Vacuum Tube Driven Mobile Power Amplifier - Overview DESIGN
With authentic Vacuum Tube response and an open-ended design, (ZERO global negative feedback), Tube Driver overcomes one of the most universally agreed upon sonic problems plaguing virtually all current amplifier designs; harsh degenerative feedback causes a plethora of undesirable sonic products. Tube Driver eliminates global negative feedback entirely! Coupled with a totally unique output load mirroring circuit, the hand selected 6SL7GT twin triode tubes operate in a safe, near plate-saturated mode continuously. The design creates the ideal electrical environment for classic vacuum tube thermionic characteristics. PERFORMANCE
Tube Driver amplifiers utilize natural vacuum tube thermionic emissions to automatically enhance biasing of the audiophile-quality Sanken bi-polar devices used in every model. This unique USA patented design reduces both Crossover and Total Harmonic Distortion (THD) figures to LESS than 0.15%. This achievement is almost unheard of in an open-ended, ZERO negative feedback high fidelity amplifier. Conventional open-ended/low feedback vacuum tube amplifiers often exhibit real world THD of 2% or greater and are generally limited to quite low output power. Tube Driver operates at 10 times less THD while maintaining real power vacuum tube tonality! Now you can hear the original pure essence of vacuum tube audio with a Tube Driver amplifier. PROTECTION
All this performance must be effectively controlled. The exceptional electrical design of the Tube Driver, coupled with a MASSIVE aluminum heat exchanger and heat sink, provides protection and cooling capacity far in excess of any contemplated needs. A long life, temperature-controlled cooling fan is activated if the surface temperature exceeds 50° C, keeping heat stress well within safety levels. Additionally, DC fault protection with soft start (10-15 sec) and a fully regulated DC tube-heater supply circuit protect your Tube Driver amplifier in every way possible. General features: • ZERO negative feedback. No global negative
degenerative feedback loop
• Open Ended Audiophile Circuitry
• Musical, warm and dynamic, rivaling "all-tube" single-ended home audiophile amplifiers
• Hand selected/matched 6SL7GT Twin Triode tubes (One per channel)
• Fully regulated Tube Heaters with Delayed Soft Start
(10-15 second turn-on delay)
• Load Adaptive Vacuum Tube Driven output circuitry
• Massive (400% oversize) internal/external Heat Exchanger with Temperature-controlled Fan Cooling
• Tightly regulated MosFET Power Supply
• DC fault / Short Circuit Protection Circuitry
• Dual Color Diagnostic LED: Green=Normal / Red=Fault
• Gold Plated RCA, Power and Speaker Connectors
both RCA and XLR (balanced) input connectors
• Frosted Platinum finish
• Patented Design
• Concept & Design: BK Butler / USA Specifications: • Rated Power (both channels driven):
2 x 75 Watts RMS
• 2-Ohm Stereo, 4-Ohm Mono Stable
• Freq response: 5Hz to 100kHz (+/- 1dB)
• THD: <0.19% (30kHz bandwidth)
• S/N Ratio: >105dB (A-Weighted)
• Input Sensitivity: .450v - 12v RMS
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| Payment and Shipping |
| Pay By: |
Personal Check after it clears, Paypal, Money Order/Certified Check, Visa, Mastercard, American Express, Discover |
| Ship Weight: |
9 lbs. |
| Ships From: |
85701 (Tucson, AZ) |
| Ships To: |
USA and Canada |
| Shippers/Payer: |
UPS, FedEx, Postal / Paid by: Buyer |
| Shipping Notes: |
Just FYI, ground shipping + insurance will be approximately =< $20
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