The Official McIntosh Labs MX-151/150 Owners Thread While there a few McIntosh threads here and there, there doesn't seem to be an official owners thread. I decided to start one and place it in this forum, since it's a processor that would typically be part of a $20k plus home theater setup. From the McIntosh web site: Description: The very best in music and film presentation - that's what you get with the MX151. Featuring the latest in HDMI technology with full support of 3D video pass-through, you'll see everything current Blu-ray discs™ have to offer. And when you combine the built-in Dolby® TrueHD and DTS-HD Master Audio™ decoding with the RoomPerfect™ room correction technology, which adjusts the audio signal to the specific acoustics of your space, the result is an enveloping audio experience that puts you in the center of the action.

Dual Zone feature allows you to play different media simultaneously in two separate rooms with independent program selection and control. The vast array of digital and analog inputs can be custom labeled for simplified system operation and matched in volume level for a smooth transition between sources. Assignable balance input and outputs, an analog phono section, bass and treble controls and optional processing up to 7.1 multi-channel using Dolby Pro Logic® IIx or DTS Neo:6 all enhance the two channel audio experience of the MX151. The MX151's unprecedented flexibility allows custom system design and function for every environment. Control options include traditional IR-remote, web based GUI, and interfacing with all third party control systems. Audio options for up to 12 channels, multiple subwoofers, or bi-amping of speaker systems are built in.

Shop from the world's largest selection and best deals for McIntosh Home Audio Amplifiers and Preamps. Original manual and. McIntosh MX151 Preamplifier. Owner's Manual Service Manual Brochure Catalog. MX151: MX151_own.pdf. McIntosh_History.pdf: Miscellaneous. Mcintosh manuals and schematics all available for free download. Mcintosh ultimate repair service manuals. View and download mcintosh mx151 owner's manual online. Preview McIntosh Amplifiers MC-2205 User's Manual Online and Download PDF Manuals & Instructions for FREE from Manualagent.com.

RoomPerfect is a registered trademark and the RoomPerfect logo is a trademark of Lyngdorf Audio A/S. Known Issues & Tips Known Issues: - Some broadcast 5.1 (DirecTV) audio, when expanded to 7.1, drop side channel audio. Currently, McIntosh claims this is because of the way the source is encoded. - Some 5.1 broadcasts drop center channel and redirect audio to left/right. Again, McIntosh claims this is because of the way the source is encoded - Cannot expand multichannel 5.1 PCM to 7.1 - signal steering goes wonky System Control Tips: Forget the OSD: Once you've configured the MX with an IP address, it is far simpler to configure and control the MX via with web interface, (which works perfectly on the iPad as well), for everything including Room Perfect calibration. To use it, first configure valid IP settings on the 150/151 via the OSD (I prefer a static address, not surprisingly ending in.151), along the the appropriate subnet, gateway, and DNS settings for your network.

Once saved, simply point any web browser to the MX's IP address, and you'll see the welcome screen: Room Perfect Tips: 1) Do not measure the front third of the room 2) Except for Focus Position measurements (which are pointed horizontally toward the front soundstage at each listening position), do NOT point the mic at any speaker during room measurements 3) Try to keep the mic at least three or four feet away from any speaker when measuring 4) Keep the mic at least two feet away from any surface. 5) Vary your measurements - walls (upper/lower), ceiling, floor, large furniture 6) When initially calibrating, stop when you reach the minimum Room Knowledge required (90%) Save the measurements, and check the LEVEL OFFSETS/Bypass Position: If any gains or cuts are more the +/-12 db, you will need to change get your system in balance and run again. Generally, this means the starting point for your subwoofer is too high or low. High minus values on speakers means the sub trim is too low (the MX is trying to cut the volume of the main/surround speakers to match the low level of the sub). Increase the sub's trim enough (2 - 4 - 6 db depending upon how low your worst reading was), and run Room Perfect again. Conversely, high plus gains (over +12), means the sub is too hot and the MX is trying to raise the mains/surrounds to keep up) Cut the sub's trim and run RP again. Esri Enterprise License Agreement Elastic.

If all the main/surround values were less than+/- 12 db, you are good to go. You can go back to Room Perfect to add additional room measurements positions to increase room knowledge, and additional focus positions without having to start from scratch. 7) Technically, while running RP again, all values are wiped, I like to manually clear out and save the LEVEL OFFSETS/Bypass Position values to 0. 8) Any speaker configuration changes, including crossover changes, will requires a new Room Perfect Calibration.