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McIntosh MA5100 Integrated Amplifier
درهم 6,500
تفاصيل السلعة
العمر
10 سنوات وأكثر
الحالة
جيدة مع وجود تلف بسيط
ضمان
نعم
مدى الإستخدام
تم الاستخدام باعتدال
تم النشر بتاريخ: 24 أكتوبر 2026
الوصف
The McIntosh MA5100, produced from 1966 to 1972 with an original MSRP of $449, holds a historic spot as the brand's very first fully solid-state integrated amplifier. Built right during audio's great transition era, its internal chassis layout borrows heavily from vintage tube-amp topology while pioneering the early use of reliable silicon transistors.
Technical Specifications
The MA5100 splits its internal architecture cleanly across a screened preamplifier, a robust power stage, and an over-engineered power supply.
• Power Output: 45 Watts RMS per channel continuous into both 4Ω and 8Ω loads (20Hz to 20,000Hz).
• Total Harmonic Distortion (THD): Rated at <0.25% at full output. Bench tests show it drops as low as 0.07% at 40W.
• Frequency Response: 10Hz to 20,000Hz (+0, -0.5dB).
• Damping Factor: 80 into an 8Ω load.
• Input Sensitivity: 2mV for Phono (MM) / Tape Head; 300mV for Line-level inputs (Aux, Tuner, Tape In).
• Semiconductor Complement: 34 silicon transistors, 23 diodes/rectifiers, and 2 Triacs.
• Physical Dimensions: 16" W x 5-7/16" H front panel (approx. 403 x 138 x 368 mm).
• Weight: 25 lbs (11.3 kg) net.
Key Features & Control Layout
Unlike modern minimalist integrated amps, the MA5100 features a comprehensive suite of front-panel tone-shaping and utility features.
• Split Dual-Concentric Tone Controls: Independent Bass and Treble adjustment for left and right channels, bound together by a friction clutch so they turn in unison once matched.
• Unusual 7-Position Mode Selector: Highly versatile routing options including Left-only, Right-only, Reverse Stereo, Normal Stereo, Mono (L+R), and targeted split channels.
• Dual Vinyl Equalization: A toggle switch allows you to switch between standard RIAA and the older LP curve for pre-1950s mono pressings.
• Phase Inversion Switch: Renders the left channel either completely in phase (0°) or flipped 180° out of phase.
• Advanced Protection Circuits: Features an ultra-fast electronic "Sentry Monitor" circuit alongside temperature sensors to cut the drive to the output stage if a short circuit or over-driving occurs.
• Rear Connections: Includes a direct tap for a Tape Head, a dedicated L+R summed center channel RCA output (with its own gain control), and three convenience AC outlets.
Sound Performance & Review Summary
The general consensus from reviewers and long-time owners is that the MA5100 possesses a wonderfully organic, uncolored, and "musical" identity.
• The Tube-Like Solid State: While it relies on silicon transistors, its presentation avoids the harsh, brittle "transistor sound" typical of many early generation solid-state amplifiers. It produces a wide, deep soundstage with plenty of warmth.
• Authoritative Power Delivery: Despite its modest 45W rating, real-world testing proves that the overbuilt power supply behaves with immediate dynamic recovery, driving inefficient or reactive speakers with more control than modern amps claiming double the wattage.
• Low-Volume Excelence: Shootouts against period competitors like the Sony TA1120A note that the McIntosh delivers substantially richer, deeper bass response at low, late-night listening volumes.
• Prototypical Aesthetics: It wears the transitional black-and-silver anodized faceplate with illuminated lettering. Note that it does not feature the large glowing blue VU meters found on later McIntosh models (contrary to some misinformation on gear databases).
User Insights from Vintage Audio Communities
Audiophiles who live with this amplifier regularly praise its robust headroom and reliable nature when properly maintained.
“The McIntosh MA 5100 amp is "only" rated at 45 Watts RMS per channel, but quite franklly, it beats the snot out of my previous primary vintage Sherwood amp that is rated at 100 watts per channel RMS! I dont know what the McIntosh engineers did to create...”
AudioReview.com
“With the MA 5100 RMS (continuos) music is reproduced accurately. There is no fuzziness... The silicon rectifier power supply gives instant voltage to the amplifier when needed. Recovery from the loudet musical passage is immediate.
Technical Specifications
The MA5100 splits its internal architecture cleanly across a screened preamplifier, a robust power stage, and an over-engineered power supply.
• Power Output: 45 Watts RMS per channel continuous into both 4Ω and 8Ω loads (20Hz to 20,000Hz).
• Total Harmonic Distortion (THD): Rated at <0.25% at full output. Bench tests show it drops as low as 0.07% at 40W.
• Frequency Response: 10Hz to 20,000Hz (+0, -0.5dB).
• Damping Factor: 80 into an 8Ω load.
• Input Sensitivity: 2mV for Phono (MM) / Tape Head; 300mV for Line-level inputs (Aux, Tuner, Tape In).
• Semiconductor Complement: 34 silicon transistors, 23 diodes/rectifiers, and 2 Triacs.
• Physical Dimensions: 16" W x 5-7/16" H front panel (approx. 403 x 138 x 368 mm).
• Weight: 25 lbs (11.3 kg) net.
Key Features & Control Layout
Unlike modern minimalist integrated amps, the MA5100 features a comprehensive suite of front-panel tone-shaping and utility features.
• Split Dual-Concentric Tone Controls: Independent Bass and Treble adjustment for left and right channels, bound together by a friction clutch so they turn in unison once matched.
• Unusual 7-Position Mode Selector: Highly versatile routing options including Left-only, Right-only, Reverse Stereo, Normal Stereo, Mono (L+R), and targeted split channels.
• Dual Vinyl Equalization: A toggle switch allows you to switch between standard RIAA and the older LP curve for pre-1950s mono pressings.
• Phase Inversion Switch: Renders the left channel either completely in phase (0°) or flipped 180° out of phase.
• Advanced Protection Circuits: Features an ultra-fast electronic "Sentry Monitor" circuit alongside temperature sensors to cut the drive to the output stage if a short circuit or over-driving occurs.
• Rear Connections: Includes a direct tap for a Tape Head, a dedicated L+R summed center channel RCA output (with its own gain control), and three convenience AC outlets.
Sound Performance & Review Summary
The general consensus from reviewers and long-time owners is that the MA5100 possesses a wonderfully organic, uncolored, and "musical" identity.
• The Tube-Like Solid State: While it relies on silicon transistors, its presentation avoids the harsh, brittle "transistor sound" typical of many early generation solid-state amplifiers. It produces a wide, deep soundstage with plenty of warmth.
• Authoritative Power Delivery: Despite its modest 45W rating, real-world testing proves that the overbuilt power supply behaves with immediate dynamic recovery, driving inefficient or reactive speakers with more control than modern amps claiming double the wattage.
• Low-Volume Excelence: Shootouts against period competitors like the Sony TA1120A note that the McIntosh delivers substantially richer, deeper bass response at low, late-night listening volumes.
• Prototypical Aesthetics: It wears the transitional black-and-silver anodized faceplate with illuminated lettering. Note that it does not feature the large glowing blue VU meters found on later McIntosh models (contrary to some misinformation on gear databases).
User Insights from Vintage Audio Communities
Audiophiles who live with this amplifier regularly praise its robust headroom and reliable nature when properly maintained.
“The McIntosh MA 5100 amp is "only" rated at 45 Watts RMS per channel, but quite franklly, it beats the snot out of my previous primary vintage Sherwood amp that is rated at 100 watts per channel RMS! I dont know what the McIntosh engineers did to create...”
AudioReview.com
“With the MA 5100 RMS (continuos) music is reproduced accurately. There is no fuzziness... The silicon rectifier power supply gives instant voltage to the amplifier when needed. Recovery from the loudet musical passage is immediate.
منطقة
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