Give in to the Groove

Product details

About

The 861 is Boulders first amplifier in its size and it punches well above its weight class. Don’t believe us? You should really listen for yourself.

There is a solution for those in smaller living spaces, for those that have efficient systems, or for those who like the 866 Integrated sonically but prefer separates. The 861 Stereo Power Amplifier checks all these boxes. The 861 being the newest expansion of the 800 series is the same exact size as the 812 DAC Preamplifier it makes for an attractive combo both visually and audibly. All the boards and chassis are still made in Boulder’s dedicated facility in Colorado. You get the high performance, the expertise and craftsmanship in a manageable package.

Specifications

Features
75W peak power per channel into 8 ohms, 110W peak power into 4 ohms, 200W peak power into 2 ohms

New protection circuitry enables the 861 to deliver greater current at maximum output without fear of damage to the amplifier’s electronics

Space saving design is the same footprint (width and depth) as the 812 DAC Preamplifier

In-house manufacturing efficiency improvements have made the 861 an incredible value in comparison to previous amplifiers

Smaller carton packaging means easier transportation, unpacking, and installation

Along with assembly and testing, every circuit board and piece of metalwork is produced in-house at Boulder’s dedicated facility for unparalleled quality assurance

Boulder’s traditional in-house 0.25″ (6 mm) thumbscrew binding posts are included for secure speaker cable connections and optimal sound quality

IP control, and networked HTML page

Software updates to the internal control and housekeeping systems available as needed with automated online downloads or manual USB port installation

Specs
861 Stereo Power Amplifier
Continuous Power, 8 Ohms

50W

Peak Power, 8 Ohms

75W

Continuous power, 4 Ohms

90W

Peak Power, 4 Ohms

110W

Peak Power, 2 Ohms

200W

Balanced Analog Inputs

1 pair balanced via 3-pin XLR

Outputs

.25″ (6mm) Binding posts

Distortion, THD

0.01%

Equivalent Input Noise (EIN), 20 kHz

2.6 μV

Input Impedance

100kΩ Balanced

Frequency Response, 20 Hz to 20 kHz

+0.00, -0.04 dB

Frequency Response, -3 DB

0.015 Hz, 150 kHz

Maximum Analog Gain

26 dB

Power Requirements

100V, 120V, 240V, 50-60 Hz

Power Consumption

550W Maximum

Dimensions

12″x12″x3.5″

Weight

22 lbs

GIVE IN THE GROOVE

FAQs

Please read our FAQ before sending us a message.

How is my order processed ?

Once we have received your order and your payment, we issue you an invoice that will be mailed to you with a reference number for your order. Once your order is ready : it will be dispatched to you with insurance and tracking number.

Which payment methos are available in the Online Shop ?

You can choose between Paypal, bank transfer or Credit Card. Please take in consideration that payment via bank transfer will slightly delay the processing of your order as we have to receive your funds on our bank account to confirm your order.

Why are there different estimated delays prior to sending for some of the products

One of the politics of Ana Mighty Sound  is that every order is unique and made for a single customer. You will find next to each item an estimated delay prior to delivery. We will do our best to fulfill it before this delay (and most of the time we do).

Please keep in mind that we are a 100% human company working all over the Old World (Europe) and that we do commit to deliver you the best made / best quality product available, and to insure that : this can take some time.

Of course… some of our products are in stock !

Can I specify a courrier for my order ?

Yes you can ! Just drop us a line in the « additional remarks » of your mail order. This may add additional fees to your order. We can work with DHL, TNT, FedEX, UPS, French La Poste or Chronopost.

What if I have received the wrong item ?

In the very unlikely case this would happen just send us a photo of what you received and we will send you a courrier to fetch the item back. Once we have checked it out, we will send you the correct item.

My items are not up to specifications, what should I do ?

This is highly improbable as we use the most modern techniques to insure that our products are up to specs. In fact we even have a dedicated person checking that every single item is in perfect condition prior to shipping. Of course it can happen, but we doubt it seriously. In any case if you were bothered by something : just send us an email and we will sort it out with you.

I am very happy/disappointed with my order and I want you to know it ?

Please do not hesitate to drop us a line and we will be always happy to answer all of your requests. Our aim is your complete satisfaction.

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