Transcript The First Attenuator - Altair PW-5

~Attenuator History~
The First Attenuator - The Altair PW-5
• First Attenuator marketed was the Altair
• It used wavy tungsten elements to dissipate the load; similar to
toaster elements. These were reported to cause amp or tube
damage.
The 2nd Generation Attenuator was the Scholz Power Soak (designed
by Tom Scholz the guitarist of Boston, he designed RockMan gear)
• This unit was a little better than the Altair. It uses banks of graduated
resistors to dissipate load. This is identical to modern attenuator circuit
design. It works better than the Altair, but users reported liability issues
such as:
1. Not very road worthy, solder would melt from heat, the load would become
disconnected, thus damaging the amp.
2. Tone and feel were diminished. The higher the attenuation, the worse the
effect.
3. 4db stepped attenuation - nearly impossible to set exact desired volume.
All attenuators to come will use
the same basic circuit design
used in the Scholz Power Soak!
Next came the Trainwreck Airbreak
• Ken Fisher worked for Ampeg. In the 80’s he designed his own line of amps called
Trainwreck Amps. These amps are regarded as some of the best in the world. Mr.
Fisher passed away on 12/23/06 and is truly missed. His legacy lives on and some of
his amps fetch around $30,000 each today.
• He also designed an attenuator called the Trainwreck Airbreak.
• It uses the same basic circuit design as the Scholz Power Soak .
The Ken Fisher original design of
the Trainwreck Airbreak was then
licensed to:
Kendrick Amplifiers for the
Power Glide Attenuator
Dr. Z Amplifiers for the
Dr. Z Air Break
Komet Amplifiers for the
Komet Airbrake
• Unable to locate a photo of the Komet Airbreak Attenuator
• Very Limited Availability
Then came THD Hotplate.
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It uses the same basic circuit design as the Scholz Power Soak .
It is the best selling Attenuator on the market.
Tone and dynamics are about the same as the Scholz Power Soak .
THD case is used as the heat sync. Very cleaver design and this
makes it smaller in size.
Then came the
Marshall Power Brake
• It uses the same basic circuit design for the Scholz Power Soak .
• Tone and dynamics are about the same as the Scholz Power Soak .
• It is huge in size and weight.
Then came the Weber Mass line
•It uses the same circuitry design as the Scholz Power Soak
•One difference is it uses a Speaker Motor to dissipate load instead
of resistors. The speaker motor moves like a speaker and is a good
idea; But it still has similar tone and dynamic issues.
Then came the Bad Cat Leash
• It is the latest attenuator of the same basic circuit design as
the Scholz Power Soak .
• Instead of using a fixed resistor to dissipate load, they use
rheostats. This is great idea, but it still has the same inherent
tone and feel problems of the other attenuators.
Remember the Inherent Problem with
most SPS type design attenuators is:
• Poor Sound Quality – Diminished Tone & Feel.
• Supports only one or two Ohm ratings.
• Stepped Attenuation – Each step moves the signal thru
another resistor bank in 4db steps thus degrading the original tone. The
more Attenuation applied, the further degraded the tone sounds.
The Solution to these
Tone Problems?
The Ultimate Attenuator
• Continuous hi-fidelity smooth taper attenuation from 0 to –
64db
• Total preservation of amp’s actual feel – no frequency roll off
• Supports any Ohm rating – You can safely mix and match
head & cab impedance!
Ultimate Attenuator Options Include:
• 100 Volt Tap – Runs the Amp with Less Heat thus greatly
preserving tube and component life.
• Bedroom Switch - Changes the volume pot to a higher impedance
that allows you dial in a lower volume with no loss of tone & feel
– Just Listen for Yourself!
• Plexi Switch - This boosts Presence and creates Bite that cuts
through without changing original tone & feel.
• Variable Line Out - The variable line level output is great for
running a wet/dry rig setup, and/or line out to a board. It is voiced
to sound excellent - many customers say it is the best sounding
line out they have heard!
• 200 Watt Load Upgrade - This upgrade increases the maximum
input load from 100watts to 200watts.
– Recommend for use with 6550 type output tubes or (4) or more EL34
output tubes.
– The 100 watt Marshall’s run 4 EL34 output tubes and actually output 120+
watts.
The Ultimate Attenuator
• THE BEST SOUNDING ATTENUATOR AVAILIBLE
TODAY!
• TRULY HEAR YOUR AMP’S ACTUAL TONE FOR THE
FIRST TIME GUARANTEED!