Mapletree Audio Design
offers a unique range of products designed and hand
crafted by Dr. Lloyd Peppard, a retired electronics
engineering professor. The goal is to increase your
enjoyment of recorded music through the use of vacuum
tube amplification and signal processing. |
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| Quick Find: Headphone Amplifiers
| Preamplifiers |
Other Products (line routers,
Dynaco driver boards, power amplifiers, crossovers) |
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SOLD. Special offer: Ear+ HD Super II demo with deluxe options. Save $300! ![]() ![]() Ear+ HD Super II with less than 10 hours operation with new warranty. This unit has Auricap 30 uF output capacitors, Vampire copper body RCA jacks, and Neutrik locking headphones jacks, all for the $850 price of a standard Ear+ HD Super II plus shipping. |
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| Mapletree Audio Design Product Overview | |||
| Go to: Preamps • Headphone Amps • Other
products (Power amps, Dynaco ST70 driver module, Magic
Eye monitors, Line Routers) NOTE: All MAD components, with the exception of the Super Stealth and Stealth Max power amplifiers, are available for 230-240 VAC 50 Hz at no extra cost. Super Stealth and Stealth Max monoblocs for 230-240 VAC are available at a slightly higher price. Chassis colors include RCA red, textured black, Sylvania yellow, eggshell white, cobalt blue, and sage green. Side panels are available in stained oak or ebonized maple (see Ear+ HD photos below for examples).
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Preamplifiers |
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| Line 2A SE
Line Preamplifier
Review
of Line 2A SE by John Hoffman in Affordable
Audio July/07 issue • Line 2A SE Preamp wins "Affordable$$Audio 2007 Big Bang, Little Bucks Award". See the January Issue of Affordable$$Audio (www.affordableaudio.org).
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Ultra 4A SE Phono/Line Preamplifier "MAD [Ultra 4] is my vote for best bang for the buck, heck maybe even best product contention at any reasonable price". NEW! Customer Review of
Ultra 4A and Ear+ Purist ![]() • Premium passive components include Auricap coupling capacitors and Black Gate bypass capacitors. ![]() • 48 dB phono gain, two 18 dB line inputs, two line outputs. • Individual channel level controls plus volume control for optimum gain adjustment. • 2 x 12SN7GT (switchable for 6SN7GT) and 2 x 12SC7. • Separate PS 2 power supply included. (Shown in custom grey hammertone finish) More Information • Customer Comments |
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PS 2 Power Supply (included with Line 2A SE and Ultra 4A SE)
• Provides 12 VDC@1A
(regulated) and +200 VDC@15 mA. |
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Headphone Amplifiers |
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| "Now I have to listen to all my CDs all over again. I have a decent stereo system but with the Ear+ it sounds like a $20,000 setup". Review
of the Ear+ by Steve Albers on Audio
Asylum NEW! Latest review of Ear+ HD on Head-Fi (with Grado PS-1000): Go To forum review Dowload review |
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Ear+ HD Super II Headphone Amplifier. The use of
6BQ5/EL84 output tubes in the Ear+ HD250 was popular with customers
who appreciated the wide availability of the type. Like
the HD250, the
new HD Super II
utilizes the EL84 with triode connection in cathode
follower mode (as is the 12B4A in the Ear+ HD). The
12AX7/5751 drivers are configured in SRPP topology. The
power supply is constructed on a separate chassis to
obtain the lowest possible noise floor and to minimize
heat buildup in the main amplifier chassis, thus
increasing component life expectancy. Both units are a
compact 5" wide. Appearance is distinctive with brushed
aluminum and chrome trim. Wood side panels are not
available as both chassis have ventilation holes along the
sides. The two chassis can be stacked, positioned side by
side or even located on different shelves. A 1 ft power
interconnect cable is supplied; longer cables can be
requested. Available with 240 VAC wiring at no extra
cost..
![]() ![]() User's Manual with full specifications ![]() ![]() Passive preamp option ($50) provides three inputs and a passive output. |
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![]() Now Available: Remote
volume control module for HD Super II. Bent Audio motorized Alps potentiometer or DACT stepped attenuator options. Provides 4 inputs, source output, and passive preamp output. Please inquire about price and package options. |
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SPECIAL OFFER while supply lasts. Upgrade your Super II with Solen 33 uF polypropylene PB series film output capacitors for FREE ($30 value). |
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NEW! Latest review of Ear+ HD on
Head-Fi (with Grado
PS-1000): Go
To forum review Dowload review ![]() ![]() • Outstanding headphone performance for a wide range of headphone impedances and drive requirements. • 2 x 12B4A NOS and 1 x 5751/12AX7/ECC83 tubes. • High and low impedance headhone jacks. • Premium passive components include Tantalum film plate resistors and Alps volume control. • Ultra high-speed rectifier diodes and Alps volume control are standard. • Passive line output for use as a passive preamp. • Dual inputs for easy patching into system. More Information • Customer Comments |
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| Contact
Information |
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Dr. P spins some 78s on his
mini system. Photo by Christian Keresztes For more information or to place an order, please telephone or email Lloyd Peppard at (613) 387-3830 lloydpeppard@yahoo.ca Lloyd Peppard
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