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Mackie M800 FR-Series High Current Professional Power Amp

Enormous amounts of current into extremely low impedances. (26) Read 1 review for this product | Rate and review this product
Ships to: Can ship to United States
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Product Description

When Mackie introduced thier FR Series(tm) High Current Power Amplifiers some folks went, "Huh Power amps from Mackie" After all, they've mostly been known for their precision, studio-quality mixers.

Three years later, the "Huh's have turned into "WOW!s." FR Series amps are everywhere! And with good reason. They've racked up a strong record of reliability in demanding sound reinforcement applications. And tens of thousands of satisfied owners have come to appreciate FR Series sound quality and extra system-enhancing features. Now they've proliferated inside the powered mixers, active sound reinforcement speakers, and industry-standard HR824 near-field studio monitors.

FR Series power amps don't pull power out of the ozone or switch on and off a gazillion times a second. They're traditional "lead sled" designs with massive toroid transformers, huge storage capacitors, state-of-the-art output devices and cooling systems that outperform all amps in their price ranges. They deliver enormous amounts of current into extremely low impedances - and they have dynamic power reserves to spare. The reason FR Series amps are so affordable is because of Mackie's huge investment in automated manufacturing technology, not because they cut any corners.

Cutting to the chase: FR power amps sound better than their competition when driven into clipping (overload). Since that's how 99 out of every hundred PA systems are usually operated, this is a major point.

When an amp clips, you start hearing harmonic distortion. So conventional amps use something called negative feedback to help control clipping distortion. The output section of the amp sends a signal back to earlier stages to "throttle the system down." The trouble is, this "solution" causes its own problem: During clipping, when the amp relies on negative feedback, it electronically "confuses" earlier amp stages, causing them to latch in a clipping mode instead of recovering quickly. Latching causes the amp to sound really awful when pushed too hard - which it inevitably will be.

To effectively deal with clipping, an amp must be able to recoup almost instantaneously. That's what is meant by Fast Recovery. FR Series amps use very sparing amounts of negative feedback. Then they use complementary Baker Clamp circuits on the positive and negative voltage amp stages, which prevent the stages from saturating (and latching) during periods of overdrive. An additional transistor senses when the Baker Clamp is active and then activates the FR Series amplifiers' internal limiting circuits. The result is no latching, instant recovery from overdriving the amp, and way better sound.

The more heat you can conduct away from an amp's output devices (transistors) the longer they'll last. The better physical contact that can be made between a transistor and its heat exchanger, the more heat can be pulled away and dissipated in the air. All 4 FR Series amplifier models have a mirror-polished heat exchanger that maximizes thermal transfer. This requires hand polishing the exchanger extrusion, but we think it's worth it to achieve better reliability and performance.

The exchanger itself is transverse mounted with its air inlet in the middle. Cool room air enters the front of the amp, then travels down 2 short cooling tunnels and exits on the amplifier's sides. This T-Tunnel design provides a more constant thermal gradient than one long cooling tunnel - in other words, 2 short air passages keep all transistors closer to the same temperature instead of getting processively hotter as the air temperature increases down one long exchanger.

A big advantage to owning an FR Series amp is that you get important extra features. Features other amp manufacturers make you pay extra for or leave out all together.

Variable low cut filters for tighter bass. All PA cabinets only reproduce bass down to a certain point, called the tuned frequency. Below that point, you get audio sludge and potential woofer damage. FR Series variable low cut filters let you feed your system only the frequencies it can handle. You can "dial in" any tuned frequency from 5Hz to 170Hz. All models also include an infrasonic stabilizer circuit that cuts the really low frequencies that cause visible woofer cone flutter.

Constant Directivity Horn EQ for smoother treble. To improve high frequency reproduction, many sound systems use constant directivity (CD horns). They improve treble dispersion by more evenly distributing high frequencies. But in doing so, they actually create a frequency "dip" that reduces important frequencies anywhere from 2.5kHz to 5kHz. The old way to compensate for this was a special crossover module (hard to find and usually expensive) or a graphic equalizer (nice try, but the "cure" is worse than the problem). The M

zZounds is an authorized dealer of Mackie products.
Maximum Power
175 watts per channel into 8 ohms
275 watts per channel into 4 ohms
400 watts per channel into 2 ohms
500 watts into 8 ohms bridged
800 watts into 4 ohms bridged

Power Bandwidth: 20Hz-70kHz (+0, -3dB)

Frequency Response (1 watt, 8 ohm load)
20Hz-40kHz (+0, -1dB)
10Hz-70kHz (+0, -3dB)

Power Consumption
At idle: 55 watts
With musical program fully loaded:
2 ohms/side or 4 ohms bridged 600w
4 ohms/side or 8 ohms bridged 400w
Continuous sine wave 8 ohms 550w
Continuous sine wave 4 ohms 950w
Continuous sine wave 2 ohms 1500w

AC Line Power: 120 V AC 60Hz

Physical
Dimensions (H x W x D): 3.5 x 19.0 x 15.25 in.; 89 x 483 x 387mm
Overall Depth: 16.25 in.; 413mm
Weight: 28 lbs.; 12.7 kg

Note: Specifications may change at any time without notice.
If you have additional warranty questions, please contact the manufacturer at 800-898-3211 and 425-487-4333
Customer Reviews
4.5 out of 5 (26 ratings) Rate and Review This Product
zZounds has verified that this customer bought this product from us. "Mackie and my dilemma"
Sound: it would sound better i suppose if i were spinning music at cd quality instead of mp3's Ease of Use: just hook up play Quality: bought this for a gig i had coming up. Practiced spinning for a few days straight with no problems. I turned on my tables and mixer , turn on the Mackie ...i hear a fizzle of some kind, then smell something electrical burned. This equipment was brand new and never left my home. I had to return it to Zzounds and it cost me a gig waiting for the replacement. Value: Could go for 250...i cant see why not. Manufacturer Support: Zzzounds was great they sent me a replacement within a few days and apologized for my loss. The Wow Factor: Nothing sexy about this piece of equipment. Overall: this Mackie better last me the life of the warranty.
Style of Music: funk soul afrobeat hip hop pop reggae latin
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Available on
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Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

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We approve everyone, with very few exceptions, as long as we can verify your identity.
No interest. Ever.
It's just as if you paid the whole amount up front!
No paperwork. Nothing to track.
No application to mail or fax, no bills to pay. We automatically charge the payments to your credit card.

We'll wait on your money so you don't have to wait for your gear!

When you checkout, just click the Play as you Pay checkbox to indicate which installment plan you wish to use.

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on most orders $29+

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Really heavy stuff might cost you a
little more

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Why fight traffic and pushy salesmen when we'll bring your gear straight to your home, free of charge?

zZounds free shipping is really free!
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Fast, reliable delivery
We have warehouses on both coasts, so most shipments arrive in 3 days or less.
We don't collect sales tax. Bonus!
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