RELENTLESS EPIC 1600
RELENTLESS 800
MONOBLOCK AMPLIFIEROWN ER ’ S MAN UAL1A NOTE FRO M DAN D’AGOSTINOFounder, CEO, and chief designer of Dan D’Agostino Master Audio Systems
Every audio designer has a product they’ve always wanted to make but never could.
Either they worry it would be too costly for their customers to accept, or they fear it
would be too far ahead of its time, or they lack the resources to fund the research anddevelopment process. But thanks to the incredible support and encouragement that ourcustomers and dealers have given me since our founding days, I finally felt I could build
the amplifier I always dreamed of making: the Relentless Monoblock.
The Relentless Monoblock is the product of a simple question: “What amplifier would
I build if I could build any amplifier I wanted?” The simple answer is: an amplifier without
any limits.
Of course, every amplifier has at least one limit: the amount of power it can pull froma household AC circuit. But the Relentless is designed to work not only with standard
110-volt AC, but also with 220-volt/30-amp circuits, which allows the Epic 1600 to deliver astaggering 6,400 watts of continuous power into 2 ohms. With the Relentless Epic 1600,
every speaker ever made can achieve its best possible performance.
The Relentless 800 Monoblock takes the same design cues from its bigger brother,delivering identical performance attributes but with a power rating of 800/1600/3200
watts into 8/4/2 ohms, respectively.
We designed every stage of the Relentless from scratch. The unique input stage
achieves extraordinarily low noise and distortion by assuring that the positive andnegative halves of the signal are perfect opposites of each other, even if the incoming
signal is not perfectly balanced. The gain stage operates in the current domain instead of
the voltage domain, so it cannot be affected by fluctuations in the speaker’s impedance.
Our Super Rail design provides additional voltage to the gain stage, effectively“turbocharging” the output stage to deliver even greater dynamics and maintain an evenfirmer grip on the speaker. The linear open-loop response of these stages allowed us toeliminate global feedback, and thus preserve the music’s subtlest details.
My team and I couldn’t have built the Relentless if we weren’t confident that ourcustomers and dealers would back us in our efforts to create the world’s best audio
components, bar none. We thank you for purchasing this amplifier… and for believing in
the vision of Dan D’Agostino Master Audio Systems.

Sincerely,

1

LEGAL N OTIFICATIO N S
Dan D’Agostino Master Audio Systems is a registered trademark of Dan D’Agostino Master AudioSystems LLC. The information in this owner’s manual is subject to change without notice. CurrentVersion 2.0 of this manual was produced by the Dan D’Agostino Master Audio Systems LLC
engineering, sales and marketing departments.
The information in this manual is the sole property of Dan D’Agostino Master Audio Systems LLC.
Any reproduction in whole or part without the expressed written permission of Dan D’Agostino Master
Audio Systems LLC is prohibited. No material herein may be transmitted in any way, including either
electronic or mechanical methods, for any purpose without the expressed written permission ofDan D’Agostino Master Audio Systems LLC.

WARNING
Do not expose this amplifier to moisture or excessive humidity, and do not use it outdoors. Fire hazard
may result.
The lightning flash with arrowhead, within an equilateral triangle, is intended to alert theuser to the presence of uninsulated “dangerous voltage” within the product’s enclosurethat may be of sufficient magnitude to constitute a risk of electrical shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to thepresence of important operating maintenance (servicing) instructions in the literatureaccompanying the appliance.

CAUTION
No user-serviceable parts inside. Do not open the amplifier’s chassis or remove any of its screws.
Contact Dan D’Agostino Master Audio Systems LLC or your dealer if you have service needs.

2

U N PACKIN G AN D IN STALL ATIO N
Package contents
If any of the following items are missing, please contact your dealer:
1 Relentless Epic 1600 or Relentless 800 Monoblock amplifier in protective vinyl sleeve
1 owner’s manual
1 microfiber cleaning cloth
1 AC power cord (selected for your voltage and socket requirements)
1 ratchet with custom carbon-fiber socket for binding post

Unpacking the Relentless Monoblock amplifier from its case
Each Relentless Epic 1600 amplifier weighs 570 lbs/258 kg and the Relentless 800 weighs
320 lbs/145 kg, so each requires at least four strong adults to lift. Be sure to have a place cleared forit before you lift, and move the box as close as possible to the spot where the amplifier will rest.

Installation requirements
In most cases, the Relentless amplifiers will have to sit directly on the floor, because few shelves orstands can support their weight. If you do use a stand, make sure it has been designed specifically tosupport the Relentless amplifier. Stands used for other amplifiers will not be strong enough.
Adequate ventilation must be provided for the amplifier. There should be at least 6 inches ofclearance on each side of the amplifier and 6 inches of clearance at the top and bottom vents of theamplifier must not be obstructed by thick carpet, dust, etc. The amplifier may be installed in a closed
cabinet in an equipment closet, but the cabinet or closet must be designed with substantial ventilation
at top and bottom; active ventilation (i.e., powered fans) is preferred. Do not place the amplifier
directly on the a carpeted floor.
For best possible sound quality and maximum output, you must connect each Relentless Monoblock
amplifier to at least a dedicated 20-amp outlet. If your speakers are rated at 4 or 2 ohms impedance,and you want the amplifier to be able to achieve its maximum rated power, you will have to have two
220-volt/30-amp sockets installed, one for each amplifier. This is the same type of outlet commonlyused to power electric clothes dryers and ovens, and any licensed electrician can install them.

3

MAKIN G CO N N ECTIO N S TO TH E
RELENTLES S M O N O B LOCK AM PLIFIER
Speaker cables
Install the speaker cables first. We recommend the use of high-quality cables terminated with spade orring lugs that will fit the amplifier’s binding posts. We advise against the use of bare-wire connections.
Note that the positive (+) binding post has a red ring and the negative (–) binding post has a black ring.
Double-check to confirm that you are connecting your speaker cable’s conductors to the appropriate
binding posts—red to positive, black to negative. If your cables are marked to show desired signal flow,orient the cable so that the installation conforms to the cable manufacturer’s instructions.
Carefully loosen each speaker binding post to install speaker cables tipped with spade lugs or rings.
Turn counter-clockwise to loosen. If using spade lugs, insert each spade lug so that its two tines
straddle the binding post, then tighten the binding post nut with a binding post wrench. If using rings,
remove the binding post nut entirely, place the ring on the binding post, then replace the nut andtighten it securely.
A firm connection, tight enough that the spade lug or ring cannot move, is all that is needed. Do not
use a conventional wrench to tighten the binding posts. Be sure the wires are not in contact with
one another.

Interconnect cables
Connect the XLR cable to the input by pushing the cable onto the jack. To release the XLR cable, pushon the small tab on the end of the jack then grasp the cable by the plug and gently pull it out. Nevergrasp interconnect cables by the cable itself—you could damage the cable.

12-volt trigger input and output
The 1/8-inch (3.5mm) 12-volt trigger input and output jacks allow the Relentless to turn on automaticallywhen connected to a preamplifier or home automation system with 12-volt trigger output. Connect acable with a 1/8-inch plug (stereo or mono) on each end from the preamplifier’s 12-volt trigger output
to the amplifier’s 12-volt trigger input, and a second cable of the same type from the amplifier’s
12-volt trigger output to the other amplifier’s 12-volt trigger input. The amplifiers will automaticallypower up whenever the preamplifier is powered up.

AC cord
The Relentless Epic 1600 amplifier is fitted with threaded terminals for its power connections,rather than the IEC connector found on almost all other power amplifiers. Your amplifier has been
shipped with the appropriate power cord for the voltage and socket available in your region/country.
We strongly recommend you have a licensed electrician connect your power cable, to ensure theconnections are correct. Incorrect power connections will void your warranty and can damage
your amplifier.

4To connect the power cable, remove the two screws on the plastic cover that protects the AC cableterminal connections. Remove the nut on the amplifier’s positive terminal, place the spade ring of
the positive (+) conductor of the cable over the terminal, then replace the nut. Tighten the nut firmly
but gently with a 3/4-inch socket wrench. Use of excessive force on the socket wrench could damage
the terminal. Repeat the process for the negative (–) and ground conductors, then replace the plastic
cover and tighten the two screws down to secure it.
The Relentless 800 uses a 30A locking connector. Your AC power cable has been shipped with theappropriate power cord for the voltage and socket available in your region/country.

Relentless Epic 1600 power cord terminals

Relentless Epic 1600 power terminal cover

Relentless 800 power cord connector
5RELENTLES S EPIC 1 6 0 01234

511968

1. Heat sink venturis

7. 12-volt trigger output

2. Top panel vents

8. Three-position toggle switch for		 power meter brightness

3. Power meter
4. Standby/power button
5. XLR audio input
6. 12-volt on/off trigger input
6710

9. Speaker cable binding posts
10. Main power switch
11. AC power cord terminals

RELENTLES S 8 0 01234511106789

1. Heat sink venturis

7. 12-volt trigger output

2. Top panel vents

8. Three-position toggle switch for		 power meter brightness

3. Power meter
4. Standby/power button
5. XLR audio input
6. 12-volt on/off trigger input

9. Speaker cable binding posts
10. Main power switch
11. AC power cord connector
7A LOO K IN SID E
Premium parts andprecision machining ofcopper and aluminum arefundamental in achieving
the uncompromising
performance and build
quality of the Relentless
Monoblock amplifiers.

RELENTLES S 8 0 08

9O PER ATIO N
Initial power-up of the amplifier
Make sure the main power switch on the back of the amplifier is in the on position. The power meter
will be illuminated in red. The standby/power button is located on the front underside edge of theamplifier, right of the meter. Pressing the button will power up the amplifier, and the power meter
will change to green. After power is switched on, the Relentless amplifier requires approximately
30 minutes to reach optimal operating temperature. Although the amplifier will sound excellent upon
initial listening, the sound quality will improve as it warms up, much as the flavor of a fine red wine
improves if it is allowed to breathe for a few minutes.

During operation
The Relentless amplifier requires no adjustments during normal operation. If there is no sound or thesound quality is in some way impaired, please consult your authorized DDMAS dealer or distributor.

Power meter setting
The Display Low/Off/Hi switch on the back of the amplifier adjusts the illumination of the meter. Moveit to the left (when looking at the amplifier from the rear) for low brightness and to the right for highbrightness. If the switch is in the center position, the meter light will be turned off. The Relentless
amplifier’s power meter has self-adjusting sensitivity, so it will automatically provide a setting thatdelivers the most useful response for any given power level.

Maintenance
The Relentless amplifier requires no user maintenance other than to keep it clean and ensure that thevents remain unobstructed.
To clean the amplifier, first disconnect the AC plug. Spray a small amount of distilled water onto thesupplied microfiber cloth and gently wipe the amplifier’s surface in the direction of the metal grain.
Do not use a circular motion or apply heavy pressure. Do not apply the water directly onto the surfaceof the amplifier.

TROU B LESH OOTIN G
If you experience any issues with the operation of your Relentless Monoblock amplifier, please contact
your dealer or Dan D’Agostino Master Audio Systems at service@dandagostino.com
or 480.575.3069.

10RELENTLES S EPIC 1 6 0 0 & 8 0 0 M O N O B LOCKAM PLIFIER LIMITED WARR ANT YDan D’Agostino Master Audio Systems LLC warrants the Relentless Monoblock amplifier against
manufacturing defects and defects in materials for five years from the date of purchase or six years
from original ship date, whichever come first, from an authorized Dan D’Agostino Master Audio
Systems dealer, subject to the conditions listed below:
1.		

The warranty covers only new products purchased from an authorized Dan D’Agostino
Master Audio Systems LLC dealer.

2. The warranty is non-transferable and is valid only for the original purchaser.
3. The warranty is valid only if the product has been used according to the instructions in		 the owner’s manual. Damage due to accidents or owner abuse or neglect is not covered		 under this warranty.
4. All service must be performed by an authorized Dan D’Agostino Master Audio Systems		 dealer. Damage resulting from service by other parties is not covered under this warranty.
5. All products returned for service must be packaged in the original container and must		 include a photocopy of the original purchase receipt. If the original container has been lost		 or discarded, contact Dan D’Agostino Master Audio Systems LLC for a replacement.
6. If the product must be shipped back to Dan D’Agostino Master Audio Systems LLC for		 warranty service, the customer shall pay shipping costs. Dan D’Agostino Master Audio		 Systems LLC will pay for return shipping.
7.						Before shipping the product to Dan D’Agostino Master Audio Systems LLC for service,the customer must first obtain a Return Authorization (RA) number by calling Dan 		D’Agostino Master Audio Systems LLC. The RA number must be marked clearly on theside of the package.

8. This warranty covers only defects in products made by Dan D’Agostino Master Audio		 Systems LLC. It does not cover incidental or consequential damages, or damages to other		 products resulting from defects in Dan D’Agostino Master Audio Systems LLC products.
9. U.S. residents: Depending on which state you live in, you may have other rights not 				 elaborated in this document. For further information, contact Dan D’Agostino Master		 Audio Systems LLC.
10. Residents of other countries: Your authorized importer or dealer bears the direct 				 responsibility for warranty coverage of your amplifier. Please contact your importer		 or dealer with requests for service under warranty. Dan D’Agostino Master Audio		 Systems LLC will work with your importer or dealer to assure that the terms of the 				 warranty are fulfilled.
REGISTER YOUR RELENTLESS EPIC 1600 OR 800 MONOBLOCK AMPLIFIERS
Scan this QR code and complete the form to register your component.

11SPECIFICATIO N S
RELENTLES S EPIC 1 6 0 0Frequency response

20 Hz to 20 kHz, ±0.5 dB / <0.1 Hz to 100 kHz, +0/–3 dB

Signal-to-noise ratio>75 dB, wideband, unweighted, ref. to full power output

Gain

28 dB

Total harmonic distortion<0.05% at 1 kHz, at 1,500 W, 8Ω

Input impedance

100 kΩ

Output power

1,600 W RMS at 8Ω / 3,200 W RMS at 4Ω / 6,400 W RMS at 2Ω

Power consumption

Standby 40 W / Idle 480 W / Maximum 10 kW

Input

1 balanced via XLR connector

Outputs

1 pair binding posts

Dimensions

22.5 x 11.5 x 32.5 in (whd) / 57.2 x 28.0 x 82.6 cm (whd)

Weight (approx.)

570 lbs / 258 kg

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12RELENTLES S 8 0 0Frequency response

20 Hz to 20 kHz, ±0.5 dB / <0.1 Hz to 100 kHz, +0/–3 dB

Signal-to-noise ratio>75 dB, wideband, unweighted, ref. to full power output

Gain

26.5 dB

Total harmonic distortion<0.05% at 1 kHz, at 800 W, 8Ω

Input impedance

100 kΩOutput power

800 W RMS at 8Ω / 1,600 W RMS at 4Ω / 3,200 W RMS at 2Ω

Power consumption

Standby 35 W / Idle 325 W / Maximum 6 kW

Input

1 balanced via XLR connector

Outputs

1 pair binding posts

Dimensions

21.7 x 10.4 x 27.0 in (whd) / 55.1 x 26.4 x 68.6 cm (whd)

Weight (approx.)

320 lbs / 145 kg

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to learn more about the Relentless 800 Monoblock amplifierand download the latest owner’s manual.

RELENTLES S EPIC 1 6 0 0

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