Updated Whole House Audio Setup with a New 12-Channel Amp

Last month I picked up a Niles SI-1230 Audio Amplifier from a guy on Craigslist for crazy cheap and completely transformed my modest whole-house audio system into one that became worthy of me actually wanting to write about it. I’ve always loved the idea of whole-house audio, a pair of speakers in each room and the ability to play the music throughout the whole house with just the click of a mouse or a touch of a button on your phone. My existing setup had 4 zones and was powered by three Lapai LP-2020 amplifiers with the outside patio speakers being powered by a SMSL-SA50. I had plans to add two more zones and a brand new pair of Theater Solutions SC-6 in-ceiling speakers (bought for $12.99 from Goodwill, #bargainhunters, thanks DC) and was just waiting to bite the bullet and buy a couple more Lapai/SMSL/Dayton amps to finish off the house but for some reason could never get the energy to do so.

Which is why when I saw the ad on Craigslist for a Niles SI-1230 12-channel amp for only $50, I knew this was my chance to not only finish off the last two zones in my whole-house audio setup, but to do a serious upgrade to each of the existing zones at the same time. And I was able to do it for less than if I had just bought another pair of “t-amps” like I was planning. The deal was too good to pass up. The unit was in perfect condition too, including the original packing. I didn’t want to tell the guy that he could have sold this thing for more than $50 but he said he wasn’t interested in making any money off it, just wanted it to go to someone who would know what to do with it. Apparently few people knew what to do with this amp since the ad was a week old by the time I saw it and the guy said the few people he talked to didn’t know what kind of amp this was. This amp boasts some seriously sweet specs: 12 channels, 30W per channel into 8 ohms, 37W into 4 ohms, all channels are bridgeable into 80W per channel, input options range from discrete inputs per channel, BUS input, L+R input, with selectable “always on” or sense. And it weighs like 40 pounds! So enough with babbling, here’s how I installed this thing into my existing setup and made it a permanent addition to my whole house audio.

First step was to create a location where I could put this amp that was close to my whole-house home run and be out of the way enough to not get in the way but be accessible so I could adjust the levels and get everything hooked up easily. My home run is currently in the laundry room so it made sense to keep everything here so I wouldn’t need to run any extension cables. I started off by building a shelf using some leftover bull-nose particle board from a previous closet renovation project. It’s 15-1/4″ by 26 inches. I installed the shelf above the cabinets in a “corner” location in the laundry room. I attached a pair of 3/4″ pine “cleats” to the wall so that the shelf had something solid to rest on. I attached the shelf to the cleats with a few 1-1/2″ drywall screws.

I could have left it at this point since it was functional, but looked like crap, so I caulked and painted the shelf to match the rest of laundry room. This really finished off the shelf and made it look good, like it belonged. After finishing the shelf I realized I should have made it run the entire length of the wall on that side so I could have more storage space for electronics, amps, routers, and whatnot, but figured for this project, the shorter shelf would suit just fine.

The next thing I needed to do was pipe over 110V and bring over the CAT-5 and all speaker wires. I cut two holes in the wall above the shelf and added a plug for the electrical and another for the low-voltage wires. The two locations are separated by a 2×4 in the wall. I tapped into an outlet in the attic that was close by and fortunately was also on the same circuit as the laundry room. Since there’s not a lot of load on that circuit, it made for a perfect tapping off point for the new amp.

I drilled a couple of 1″ holes in the top plate in the attic over the wall location where the amp would sit. I pulled out the speaker wire from the old location and dropped them down the wall in the new location. I made a new CAT-5 cable to run from the exiting switch to a new switch to feed each Airport Express. I bought a cheap TP-Link 8-port 10/100 switch for each Airport Express. My entire house is wired with Gigabit switches except this switch which doesn’t need it since the Airports only run at 100Mbps.

I bought a set of (8) 3-ft CAT-5 cables to run from the switch to each Airport and a set of (6) 3.5mm-to-RCA cables to connect the audio from each Airport to one pair of channels on the amplifier. I connected each set of speakers to each pair of channels of the amp and that was pretty much it. I bought a surge protector that provided 7 outlets that were rotated so one Airport would fit into each plug. I still need to dress the cables but for now the whole setup is functional, it’s out of the way and looks a lot cleaner than the old setup. I cleaned up the cables and wires for the rest of my network and called it done. I put on some tunes and adjusted the levels for each zone and just rocked out. The new amp sounds fantastic! I added one more zone in the den/computer room while I was it also. I still have one more zone I can add and was thinking about doing a whole-house subwoofer as a zone. Maybe put a 12″ sub in the attic and then it could be selected as a separate zone for when you want a little extra bass.

Here’s some pictures below of the making of my new whole-house audio setup including the new speakers in den. And the before and after of my laundry room home run. Enjoy!

About Dan

For a complete biography, stop by www.danmarx.org and click around for a while.
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