Name: Definitive Technology SubAmp 600
Brand: Definitive Technology
SKU: 735AMP600
Rating: 5 (2 reviews)

by Crutchfield's Colin M.

Power and control for your in-wall subs

Definitive Technology's SubAmp 600 was custom-built with their IWSub 10/10 and IW Sub Reference in mind. It provides the optimal amount of power needed to effortlessly drive these passive in-wall subwoofers. It can drive one sub or a pair. If you're rocking a pair, they can be in the same room or in two different zones. A solo sub is powered with 275 watts, while a pair will get 230 watts per channel.

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Power and control for your in-wall subs

This amplifier's slim chassis slides into a rack or onto a shelf with ease. You can fine-tune your system with convenient front-panel knobs for output level, low-pass filter, and phase control.

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Product highlights:

designed to complement the Definitive Technology IWSub 10/10 and IW Sub Reference in-wall passive subwoofers
275 watts mono, 230 watts per channel when driving two subwoofers
shelf or rack mount design
front-panel volume control
front-panel variable 40-150 Hz low-pass crossover
continuously variable, front-panel phase control (0-180°)
binding post speaker-level inputs and outputs
stereo RCA line-level inputs
unfiltered LFE (Low Frequency Effects) input for connection to a home theater receiver's subwoofer output
signal-sensing auto on/off mode
rack ears included
black anodized aluminum face plate
detachable AC power cord
17-1/16"W x 3-11/16"H x 9-5/8"D (without bracket, with feet); 19-1/16"W x 3-7/16"H x 9-5/8"D (with bracket, without feet)
warranty: 3 years
MFR # UCYC

What's in the box:

Definitive Technology SubAmp 600 owner's manual

In-wall subwoofer amplifier
6.5' AC power cord
2 Mounting brackets
4 Screws
Owner's Manual
Online Product Registration card

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Researched by Crutchfield's Stacey B.

Features & specs

General
Number of Channels	1
Power Output per Channel (8 ohms)	---
Power Output per Channel (6 ohms)	---
Power Output per Channel (4 ohms)	275
Frequency Bandwidth	16-200Hz
THD	0%
Minimum Impedance	4
Bridged Power per Channel	0 watts
Speaker Outputs	2
THX Certification	No
Width (inches)	17-1/8
Height (inches)	3-11/16
Depth (inches)	11-1/8
Weight	25 pounds
Parts Warranty	3 Years
Labor Warranty	3 Years
Inputs & Outputs
Number of Inputs	3
Input Type	LFE, Speaker-Level
Removable Power Cord	IEC 2-prong
Level Controls	Yes
Speaker Connectors	Binding Post

Product Research

Features

Compatibility: The Definitive Technology SubAmp 600 is a high-powered amplifier and electronic crossover specifically engineered for use with the Definitive's IWSub 10/10 and IWSub References in-wall subwoofers (sold separately).

Subwoofer Amplifier: The Definitive Technology SubAmp 600 features two discrete high power amplifiers which provides optimal power for effortlessly driving one (275W) or two IWSubs (230W per channel), in the same room or in different zones.

Front-Panel Controls: The SubAmp 600 provides Volume, Low-Pass Crossover (40-150Hz/12db per octave), and Phase (0-180°) adjustments through convenient front-panel controls.

Low-Level & High-Level Connectivity: The Definitive Technology SubAmp 600 has a complete range of inputs and outputs to allow easy and effective hookup to your home receiver and Definitive's in-wall subwoofer (sold separately).

LFE/RCA Input: The Definitive Technology SubAmp 600 has a low-level direct LFE input which connects to your home receiver's LFE output; this type of connection bypasses the subwoofer amp's crossover network. If you are connecting the subwoofer to an AV receiver without a dedicated subwoofer/LFE preamp output, but does features a stereo RCA output, you can use the amplifier's stereo RCA inputs; this type of connection uses the amp's crossover network.
High-Level Inputs/Outputs: The speaker-level inputs (binding posts) are designed to be used on a home AV receiver that does not incorporate any RCA type subwoofer outputs. The SubAmp 600 also features speaker-level outputs (binding posts) to connect your front/main speakers. This type of connection uses the subwoofer amplifier's internal crossover network.
Subwoofer Output: The SubAmp 600 is fitted with two pair of subwoofer output binding post terminals to connect to one or two Definitive Technology in-wall subwoofers (sold separately).

Note: 5-way binding post terminals are used for the high-level inputs/outputs and subwoofer outputs. These speaker terminals will accept bare wire (up to 10AWG), spade-connectors, pin-connectors, and banana plugs (single or dual).

12V Trigger Input: Connect your AV receiver's 12-volt trigger output to the SubAmp 600's 12-volt trigger input to enable the SubAmp 600 to switch ON when you power up your home receiver.

Mounting Options: The SubAmp 600 fits easily on a shelf or in an audio equipment rack. It features side mounting brackets for use in professional audio racks. When installing the SubAmp 600 in either professional audio racks or in AV rack furniture, be sure to leave adequate ventilation space around the SubAmp 600 amplifier.

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3 questions already asked

Hi - In relation to a prior question on the Polk, I was told by Polk that this will, in fact, power the Polk CSW100 Passive in-floor/in-ceiling subwoofer. They recommended it for my failed SWA500 amp. Is this not the case? I realize it may have been designed for the definitive - but Polk wants to send me this as a replacement for the SWA500. They are all the same company.

john May 05, 2023

1 answer

Greetings John, and thank you for your question. From what I can see, the Polk subwoofer amp is discontinued. My guess is they are recommending the Definitive as an exchange as both companies are owned by a major corporation. There a little difference between the two amps. The Polk amp was putting out 500 watts to a 4 ohm load, and 250 out at 8 ohms. Your sub is 8 ohms, and its rated for the 250. Perfect match. The Polk amp also had a custom sound shaping circuit for the CSW100, and 200. The Definitive amp only has a 4 ohm rating listed, Im thinking because their inwall sub was 4 ohms? Anyway, their amp puts out 275 at 4 ohms, and most amps put out half that at 8 ohms. Short answer, I dont have an 8 ohm rating for their amp, but Im thinking it will be less than what the Polk amp had at 8 ohms. Perhaps Definitive can tell you what the 8 ohm rating would be? If its 250, great option. If its half of the 275 watt 4ohm rating, then not a good option. Sorry for the long, dragged out answer.

hogan May 05, 2023 (Staff)

Can this amp run a Polk Audio CSW155 in wall subwoofer?

francis Apr 30, 2023

1 answer

Thank you for your question, Francis. This amp is specifically designed to work with Definitive Technology's IWSub 10/10 and IW Sub Reference in wall subwoofers.

andrea May 01, 2023 (Staff)

Could this power two IWSub 10/10 in different rooms from two different receivers? Or is only one receiver supported?

michael Sep 21, 2022

1 answer

The Definitive Technology power amp is designed to only support one receiver.

arielle Sep 22, 2022 (Staff)

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