McIntosh
MC3500 Vacuum Tube Amplifier Mk II

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MC3500 1-Channel Vacuum Tube Amplifier Mk II

– 350 Watt Monoblock
– Inspired by the original 1968-71 MC3500 – the Amplifier that Inspired a Generation
– Powered by eight EL509S high-power output vacuum tubes
– Power Guard Screen Grid Sensor™, Sentry Monitor, Solid Cinch speaker binding posts
– Machined aluminum front panel with a bead blast finish and gold anodizing

Orders ship Saturday through Thursday from our offices in Dubai, UAE.

In-stock products typically ship within 48 hours and should be expected to arrive in 3-4 business days. Orders outside of the UAE should be expected to arrive in 5-7 business days.

Pre-order and backorder products will state the approximate delivery timeline beside the Add To Cart button.

If you would like to place a custom order, chat with our specialists for a guided shopping experience. Once your order has been placed, a timeline will be provided depending on your order details.

- Free delivery within the UAE
- Shipping charges will be calculated upon checkout for orders outside of the UAE (Bahrain, Oman, Kuwait, Saudi Arabia & Qatar).
- Taxes and duties are calculated according to the applicable laws of the state or country an item is shipped to and are the customer's responsibility.

For additional information on shipping and our exchange & return policy visit our help center.

Installation charges are applicable and can be paid upon delivery for our clients based in Dubai.

- Installation Charges: AED 350 Per Hour
- Speaker Cables: AED 15 Per Meter
- Trunking: AED 10 Per Meter

For clients based outside of the UAE, please contact our specialists and we will share an estimate based on your requirements.


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Product Code: MC3500-62405
Inspired by the amplifier that inspired a generation.

There's no denying the historic significance of the 1969 Woodstock Music and Art Fair. There had never been anything like it, and many would argue there's not been anything like it since. With an unexpected crowd of over 400,000 people, there was a lot that could have gone wrong – and some things did. But one aspect that's nearly universally agreed upon was how great all the musicians sounded. That sound quality is thanks in part to the McIntosh MC3500 Vacuum Tube Amplifiers that exclusively powered the sound system used at Woodstock.1 The MC3500 would go on to power many other influential music events.

It was at a 2019 event to celebrate the 50th Anniversary of Woodstock where McIntosh President Charlie Randall, realizing the historical importance of the MC3500, first dreamed of bringing it back into production. That proved no easy task considering it was first designed over 50 years ago. But after more than two years of development, that dream has become reality as McIntosh is proud to announce the MC3500 Vacuum Tube Amplifier Mk II.

The MC3500 Vacuum Tube Amplifier Mk II is a conservatively rated 350 Watt monoblock that takes its inspiration from the original 1968-71 MC3500 and incorporates everything we have learned about vacuum tube amplifier design since the 1960s. It has been upgraded to modern standards and with modern components to deliver an audio performance worthy of its predecessor and the legacy of their shared model number – all while adhering to the original design as much as possible. Like the original MC3500, the MC3500 Mk II uses our Unity Coupled Circuit output transformer, which allows the full 350 Watts to be safely delivered to virtually any speaker regardless if it has 2, 4 or 8-Ohm impedance.

The MC3500 Mk II is powered by eight EL509S high-power output vacuum tubes. The EL509S tube was chosen specifically due to it having many similar qualities and characteristics of the 6LQ6 "sweep tubes" used on the original MC3500. Like the 6LQ6, the EL509S is very rugged thanks to its robust cathode and associated heating element which produces a high peak plate current capability in excess of 1 Amp.

Sweep tubes like the original 6LQ6 were primarily designed for 1950-60s era TVs where they would sweep the cathode ray gun in the picture tube across the phosphor screen. This was a very power-hungry process that required these high-powered sweep tubes. The use of sweep tubes by McIntosh engineers in the original MC3500 amplifier was a very cool and innovative application. By using the high-power EL509S vacuum tubes, the MC3500 Mk II amplifier remains as faithful as possible to original MC3500 output design. In addition, just like in the original MC3500, the MC3500 Mk II uses an additional feedback loop to enhance the linearity of the output tubes.

Like the original MC3500, the MC3500 Mk II has a fully balanced driver section that utilizes three 12AX7A and one 12AT7 vacuum tubes. The first 12AX7A is the differential input amp; the second is the buffer/driver for the voltage amp; the third is the voltage amp. The 12AT7 is the buffer/driver for the EL509S output tubes. All the vacuum tubes are located behind the power and output transformers, and are covered by a 12-gauge stainless steel wire cage with a black powder coated finish. The cage is shaped so that our patented, gold-plated Solid Cinch™ speaker binding posts are easily accessible even when the cage is installed.

Our exclusive Power Guard Screen Grid Sensor™ (SGS) technology is included in the MC3500 Mk II. Power Guard SGS is designed specifically for our vacuum tube amplifiers and similar in nature to our patented Power Guard® technology found in our solid-state amplifiers. Power Guard SGS helps prevent premature vacuum tube failure by monitoring the screen grid current in the output vacuum tubes. If the current becomes too high, a circuit in Power Guard SGS is activated which dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels. The fully balanced driver section of the MC3500 MK II is an ideal match to use with Power Guard SGS. Sentry Monitor™, which observes the output current and shuts the amplifier off if it ever exceeds safe limits, is also included.

Both a balanced and unbalanced input are included for connecting to your preamplifier and the rest of your home audio system. A balanced and unbalanced output are also included for multi-amp configurations, such as bi-amping or tri-amping.

Just as the original MC3500 did, the Mk II version has an output meter, though it's larger and centered on the front panel instead of offset to the left side. This makes the meter easier to read and presents a symmetrical look in a typical two-channel stereo system layout. The meter uses a variation of our DualView™ Power Output Meter design, with the top scale showing the power output in both Watts and decibels, while the bottom scale shows the amplifier warmup time. When powered on, the meter starts to slowly rise; once it reaches 100%, it drops back down to zero and the amplifier is ready to play music.

The MC3500 Mk II has handles just like the original, but they have more ergonomic design that are friendlier on your hands when moving this 121 lb. (54.9 kg) heavyweight. The base of the chassis is stainless steel polished to a mirror finish. The front panel is machined aluminum with a bead blast finish and gold anodizing that emulates the look and finish of the original MC3500. A clear glass insert covers the meter; a black glass insert at the bottom houses the knobs and illuminated lettering.

As an homage to the look of the original MC3500, the Mk II features two U-shaped siderails that wrap around the top, back, and bottom of each side. Many of original MC3500s were used on the road a lot and these siderails provided a lot of strength and durability. It is a very unique design element that we wanted to duplicate in the MC3500 Mk II. There were also four black rubber bumpers on the back of the rails that allowed the amp to be temporarily stood upright while setting up for shows; the bumpers were big enough to prevent any parts sticking off the back of the amplifier from scraping against the floor and being damaged. These bumpers have also been replicated on the MC3500 Mk II.

The MC3500 Mk II is both a thoroughly modern and thoroughly retro amplifier. It's inspired by the amplifier that helped inspire a generation. You can combine with a variety of preamplifiers, turntables, CD players, media streamers, speakers and other specialty products to form a complete home audio system.
- The MC3500 Vacuum Tube Amplifier Mk II is a conservatively rated 350 Watt monoblock that takes its inspiration from the original 1968-71
MC3500, and incorporates everything we have learned about vacuum tubeamplifier design since the 1960s.

- Upgraded to modern standards and with modern components to deliver an audio performance worthy of its predecessor and the legacy of their
shared model number.

- Uses our Unity Coupled Circuit output transformer, which allows the full 350 Watts to be safely delivered to virtually any speaker regardless if it has 2, 4 or 8-Ohm impedance.

- Output powered by eight EL509S high-power output vacuum tubes, which was chosen specifically due to it having many similar qualities and
characteristics of the 6LQ6 “sweep tubes” used on the original MC3500.

- Like the original MC3500, the MC3500 Mk II has a fully balanced driver section that utilizes three 12AX7A and one 12AT7 vacuum tubes.

- Power Guard Screen Grid Sensor™ (SGS) helps prevent premature vacuumtube failure by monitoring the screen grid current in the output tubes. If the current becomes too high, Power Guard SGS dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels.

- Sentry Monitor™ observes the output current and shuts the amplifier off ifit ever exceeds safe limits.

- Uses a variation of our DualView™ Power Output Meter design, with thetop scale showing the power output in both Watts and decibels, while the bottom scale shows the amplifier warmup time.

- Front panel is machined aluminum with a bead blast finish and gold anodizing that emulates the look and finish of the original MC3500. A clear glass insert covers the meter; a black glass insert at the bottom houses the knobs and illuminated lettering.
ELECTRONIC SPECIFICATIONS

Power Output per Channel:350W @ 2, 4 or 8 Ohms
Number of Channels: 1
Total Harmonic Distortion:
- 0.3% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
S/N below rated output:120dB
Dynamic Headroom:2.4dB
Damping Factor:>25 Wideband
Rated Power Band:20Hz to 20kHz
Frequency Response:
- +0, -0.5dB from 20Hz to 20,000Hz
- +0, -3.0dB from 10Hz to 70,000Hz

CONTROL

Remote Power Control:Yes
Multi-Channel DB25 Cable:N/A

GENERAL SPECIFICATIONS

Circuit Configuration:Unity Coupled
Circuit Design:Vacuum Tube
Mono Bridge:No
Mono Parallel:No
Output Type:Unity Coupled Output Transformer
Meters:Yes
Meter Light Switch:Yes
Balanced Input:Yes
Front Panel:Machined aluminum with handles
Illumination:Direct LED
Chassis Style:Polished stainless steel

CONNECTIVITY

Speaker Binding Post Type:Patented Solid Cinch™ Speaker Binding Posts

WEIGHTS & DIMENSIONS
Unit Dimensions (W x H x D):
- 18" (45.7cm) x 11-13/16" (30cm) x 21-5/8" (54.9cm)
Unit Weight:121 lbs (54.9 kg)
Shipping Weight:147 lbs (66.7 kg)
Inspired by the amplifier that inspired a generation.

There's no denying the historic significance of the 1969 Woodstock Music and Art Fair. There had never been anything like it, and many would argue there's not been anything like it since. With an unexpected crowd of over 400,000 people, there was a lot that could have gone wrong – and some things did. But one aspect that's nearly universally agreed upon was how great all the musicians sounded. That sound quality is thanks in part to the McIntosh MC3500 Vacuum Tube Amplifiers that exclusively powered the sound system used at Woodstock.1 The MC3500 would go on to power many other influential music events.

It was at a 2019 event to celebrate the 50th Anniversary of Woodstock where McIntosh President Charlie Randall, realizing the historical importance of the MC3500, first dreamed of bringing it back into production. That proved no easy task considering it was first designed over 50 years ago. But after more than two years of development, that dream has become reality as McIntosh is proud to announce the MC3500 Vacuum Tube Amplifier Mk II.

The MC3500 Vacuum Tube Amplifier Mk II is a conservatively rated 350 Watt monoblock that takes its inspiration from the original 1968-71 MC3500 and incorporates everything we have learned about vacuum tube amplifier design since the 1960s. It has been upgraded to modern standards and with modern components to deliver an audio performance worthy of its predecessor and the legacy of their shared model number – all while adhering to the original design as much as possible. Like the original MC3500, the MC3500 Mk II uses our Unity Coupled Circuit output transformer, which allows the full 350 Watts to be safely delivered to virtually any speaker regardless if it has 2, 4 or 8-Ohm impedance.

The MC3500 Mk II is powered by eight EL509S high-power output vacuum tubes. The EL509S tube was chosen specifically due to it having many similar qualities and characteristics of the 6LQ6 "sweep tubes" used on the original MC3500. Like the 6LQ6, the EL509S is very rugged thanks to its robust cathode and associated heating element which produces a high peak plate current capability in excess of 1 Amp.

Sweep tubes like the original 6LQ6 were primarily designed for 1950-60s era TVs where they would sweep the cathode ray gun in the picture tube across the phosphor screen. This was a very power-hungry process that required these high-powered sweep tubes. The use of sweep tubes by McIntosh engineers in the original MC3500 amplifier was a very cool and innovative application. By using the high-power EL509S vacuum tubes, the MC3500 Mk II amplifier remains as faithful as possible to original MC3500 output design. In addition, just like in the original MC3500, the MC3500 Mk II uses an additional feedback loop to enhance the linearity of the output tubes.

Like the original MC3500, the MC3500 Mk II has a fully balanced driver section that utilizes three 12AX7A and one 12AT7 vacuum tubes. The first 12AX7A is the differential input amp; the second is the buffer/driver for the voltage amp; the third is the voltage amp. The 12AT7 is the buffer/driver for the EL509S output tubes. All the vacuum tubes are located behind the power and output transformers, and are covered by a 12-gauge stainless steel wire cage with a black powder coated finish. The cage is shaped so that our patented, gold-plated Solid Cinch™ speaker binding posts are easily accessible even when the cage is installed.

Our exclusive Power Guard Screen Grid Sensor™ (SGS) technology is included in the MC3500 Mk II. Power Guard SGS is designed specifically for our vacuum tube amplifiers and similar in nature to our patented Power Guard® technology found in our solid-state amplifiers. Power Guard SGS helps prevent premature vacuum tube failure by monitoring the screen grid current in the output vacuum tubes. If the current becomes too high, a circuit in Power Guard SGS is activated which dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels. The fully balanced driver section of the MC3500 MK II is an ideal match to use with Power Guard SGS. Sentry Monitor™, which observes the output current and shuts the amplifier off if it ever exceeds safe limits, is also included.

Both a balanced and unbalanced input are included for connecting to your preamplifier and the rest of your home audio system. A balanced and unbalanced output are also included for multi-amp configurations, such as bi-amping or tri-amping.

Just as the original MC3500 did, the Mk II version has an output meter, though it's larger and centered on the front panel instead of offset to the left side. This makes the meter easier to read and presents a symmetrical look in a typical two-channel stereo system layout. The meter uses a variation of our DualView™ Power Output Meter design, with the top scale showing the power output in both Watts and decibels, while the bottom scale shows the amplifier warmup time. When powered on, the meter starts to slowly rise; once it reaches 100%, it drops back down to zero and the amplifier is ready to play music.

The MC3500 Mk II has handles just like the original, but they have more ergonomic design that are friendlier on your hands when moving this 121 lb. (54.9 kg) heavyweight. The base of the chassis is stainless steel polished to a mirror finish. The front panel is machined aluminum with a bead blast finish and gold anodizing that emulates the look and finish of the original MC3500. A clear glass insert covers the meter; a black glass insert at the bottom houses the knobs and illuminated lettering.

As an homage to the look of the original MC3500, the Mk II features two U-shaped siderails that wrap around the top, back, and bottom of each side. Many of original MC3500s were used on the road a lot and these siderails provided a lot of strength and durability. It is a very unique design element that we wanted to duplicate in the MC3500 Mk II. There were also four black rubber bumpers on the back of the rails that allowed the amp to be temporarily stood upright while setting up for shows; the bumpers were big enough to prevent any parts sticking off the back of the amplifier from scraping against the floor and being damaged. These bumpers have also been replicated on the MC3500 Mk II.

The MC3500 Mk II is both a thoroughly modern and thoroughly retro amplifier. It's inspired by the amplifier that helped inspire a generation. You can combine with a variety of preamplifiers, turntables, CD players, media streamers, speakers and other specialty products to form a complete home audio system.
Read more

- The MC3500 Vacuum Tube Amplifier Mk II is a conservatively rated 350 Watt monoblock that takes its inspiration from the original 1968-71
MC3500, and incorporates everything we have learned about vacuum tubeamplifier design since the 1960s.

- Upgraded to modern standards and with modern components to deliver an audio performance worthy of its predecessor and the legacy of their
shared model number.

- Uses our Unity Coupled Circuit output transformer, which allows the full 350 Watts to be safely delivered to virtually any speaker regardless if it has 2, 4 or 8-Ohm impedance.

- Output powered by eight EL509S high-power output vacuum tubes, which was chosen specifically due to it having many similar qualities and
characteristics of the 6LQ6 “sweep tubes” used on the original MC3500.

- Like the original MC3500, the MC3500 Mk II has a fully balanced driver section that utilizes three 12AX7A and one 12AT7 vacuum tubes.

- Power Guard Screen Grid Sensor™ (SGS) helps prevent premature vacuumtube failure by monitoring the screen grid current in the output tubes. If the current becomes too high, Power Guard SGS dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels.

- Sentry Monitor™ observes the output current and shuts the amplifier off ifit ever exceeds safe limits.

- Uses a variation of our DualView™ Power Output Meter design, with thetop scale showing the power output in both Watts and decibels, while the bottom scale shows the amplifier warmup time.

- Front panel is machined aluminum with a bead blast finish and gold anodizing that emulates the look and finish of the original MC3500. A clear glass insert covers the meter; a black glass insert at the bottom houses the knobs and illuminated lettering.

ELECTRONIC SPECIFICATIONS

Power Output per Channel:350W @ 2, 4 or 8 Ohms
Number of Channels: 1
Total Harmonic Distortion:
- 0.3% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
S/N below rated output:120dB
Dynamic Headroom:2.4dB
Damping Factor:>25 Wideband
Rated Power Band:20Hz to 20kHz
Frequency Response:
- +0, -0.5dB from 20Hz to 20,000Hz
- +0, -3.0dB from 10Hz to 70,000Hz

CONTROL

Remote Power Control:Yes
Multi-Channel DB25 Cable:N/A

GENERAL SPECIFICATIONS

Circuit Configuration:Unity Coupled
Circuit Design:Vacuum Tube
Mono Bridge:No
Mono Parallel:No
Output Type:Unity Coupled Output Transformer
Meters:Yes
Meter Light Switch:Yes
Balanced Input:Yes
Front Panel:Machined aluminum with handles
Illumination:Direct LED
Chassis Style:Polished stainless steel

CONNECTIVITY

Speaker Binding Post Type:Patented Solid Cinch™ Speaker Binding Posts

WEIGHTS & DIMENSIONS
Unit Dimensions (W x H x D):
- 18" (45.7cm) x 11-13/16" (30cm) x 21-5/8" (54.9cm)
Unit Weight:121 lbs (54.9 kg)
Shipping Weight:147 lbs (66.7 kg)

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